Patent Application
20130317014
β-Amyloid deposits and neurofibrillary tangles are two major pathologic characterizations associated with Alzheimer's disease (AD). Clinically, AD is characterized by the loss of memory, cognition, reasoning, judgment, and orientation. Also affected, as the disease progresses, are motor, sensory and linguistic abilities until global impairment of multiple cognitive functions occurs. These cognitive losses take place gradually, but typically lead to severe impairment and eventual death in 4-12 years.
β-Amyloid deposits are predominantly an aggregate of Aβ peptide, which in turn is a product of the proteolysis of amyloid precursor protein (APP). More specifically, Aβ peptide results from the cleavage of APP at the C-terminals by one or more γ-secretases, and at the N-terminus by β-secretase enzyme (BACE), also known as aspartyl protease, as part of the β-amyloidogenic pathway.
BACE activity is correlated directly to the generation of Aβ peptide from APP, and studies increasingly indicate that the inhibition of BACE inhibits the production of Aβ peptide.
Amyloidogenic plaques and vascular amyloid angiopathy also characterize the brains of patients with Trisomy 21 (Down's Syndrome), Hereditary Cerebral Hemorrhage with Amyloidosis of the Dutch-type (HCHWA-D), and other neurodegenerative disorders. Neurofibrillary tangles also occur in other neurodegenerative disorders including dementia-inducing disorders.
Recently, Amyloid-β (Aβ) has been reported to be implicated in the development of RGC apotosis in glaucoma, with evidence of caspase-3-mediated abnormal amyloid precursor protein processing, increased expression of Aβ in RGCs in experimental glaucoma and decreased vitreous Aβ levels (consistent with retinal Aβ deposition) in patients with glaucoma.
The present invention provides compounds that are BACE inhibitors and are useful as therapeutic agents in the treatment, prevention and amelioration of a disease or disorder characterized by elevated β-amyloid deposits or β-amyloid levels in a patient.
The present invention relates to compounds represented by the following Structural Formula:
or a pharmaceutically acceptable salt thereof, wherein:
R1 is —H, aryl(C1-C6)alkyl or heteroaryl(C1-C6)alkyl;
each R2 is independently selected from a) —H, -halogen, —CN, —NO2, —OR5, —NR6R7, —S(O)iR5, —C(═O)OR5, —C(═O)NR12R13, and —C(═O)R5; and b) (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents selected from the group consisting of F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl;
R3 and R4 are each independently —H, -halogen, —CN, —NO2, —OR5, —NR6R7, —S(O)iR5, —C(═O)OR5, —C(═O)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, or heteroaryl, wherein each (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, or heteroaryl is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, an aryl group, and a heteroaryl group; or
X is —O—, —S—, —SO—, —SO2—, —CH2—O—, or —O—CH2—;
each Y is independently —C(R8R9)—;
W is —N(R14)—, —S—, —O—;
Z is —C(═O)—, —C(═S)—, —C(═NR15)—, —O—, —C(═O)C(R16R17)—, —C(═S)CR16R17—, —C(═NR15)C(R16R17)—, —(CR16R17)m— or —O—(CR16R17)—;
R5 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, (C3-C7) cycloheteroalkyl, aryl, heteroaryl or benzyl, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, and (C1-C3)alkoxy(C1-C6)alkyl;
each R6 and R7 are independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkoxy(C1-C6)alkyl;
each R8 and R9 are independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C14)cycloalkyl, (C3-C13)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 4 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl, heteroaryl, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl; or
R8 and R9, together with the carbon to which they are attached, form ring A, which is a 3-14 membered monocyclic ring, 9-14 membered bicyclic ring or 9-14 membered polycyclic ring, wherein ring A is optionally substituted with 1 to 4 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl;
R11 is —H, (C1-C6)alkyl or halo(C1-C6)alkyl;
R12 and R13 are each independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, amino(C1-C6)alkyl, (C1-C3)alkylamino(C1-C6)alkyl, or di(C1-C3)alkylamino(C1-C6)alkyl;
or R12 and R13, together with the nitrogen to which they are attached, form a 3-8 membered ring optionally substituted with 1 to 3 substituents independently selected from the group consisting of F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, and (C1-C6)alkoxy(C1-C3)alkyl; wherein the 3-8 membered ring optionally contains 1 to 3 additional heteroatoms, which are independently selected from O, N, and S, wherein when the additional heteroatom is nitrogen, the nitrogen is optionally substituted with (C1-C3)alkyl or halo(C1-C3)alkyl, and when the additional heteroatom is sulfur, the sulfur is optionally mono or di-oxygenated;
R14 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8)cycloalkyl, cycloheteroalkyl(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl, aryl(C1-C6)alkyl, heteroaryl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy;
R15 is —H or (C1-C6)alkyl;
R16 and R17 are each independently —H or (C1-C3)alkyl;
R18 is —H or (C1-C3)alkyl;
i is 0, 1 or 2;
p is 1, 2, 3 or 4;
m is 1 or 2; and
n is 1 or 2.
In another embodiment, compounds of the invention is represented by Structural Formula (I′):
or a pharmaceutically acceptable salt thereof, wherein:
R1 is R1 is —H, (C1-C6)alkyl, aryl(C1-C6)alkyl, or heteroaryl(C1-C6)alkyl;
R2 is a) —H, —F, —Cl, —Br, or —CN or b) (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C6)alkoxy(C1-C3)alkyl;
R3 and R4 are each independently —H, —F, —Br, —Cl or (C1-C6)alkyl;
X is —O—, —S—, —SO—, —SO2—, —CH2O— or —OCH2—;
Y is —C(R8R9)—;
W is —N(R14)—, —S—, —O—;
Z is —C(═O)—, —C(═S)—, —C(═NR15)—, —O—, —C(═O)C(R16R17)—, —C(═S)C(R16R17)—, —C(═NR15)C(R16R17)—, —N(R18)—, or —(CR16R17)m—;
R5 is —H, (C4-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, (C3-C7) cycloheteroalkyl, aryl, heteroaryl or benzyl, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, and (C1-C3)alkoxy(C1-C6)alkyl;
R6 and R7 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8) cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy(C1-C6)alkyl;
R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8) cycloalkyl, (C3-C7)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy; or
R8 and R9, together with the carbon to which they are attached, form a 3-8 membered ring (ring A) optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C6)alkoxy(C1-C3)alkyl, wherein ring A contains 0 to 3 heteroatoms, which are independently selected from O, N and S; wherein when the heteroatom is nitrogen, the nitrogen is substituted with —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl, and when the heteroatom is sulfur, the sulfur is optionally mono- or di-oxygenated;
R11 is —H, (C1-C6)alkyl or halo(C1-C6)alkyl;
R12 and R13 are each independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, amino(C1-C6)alkyl, (C1-C3)alkylamino(C1-C6)alkyl, or di(C1-C3)alkylamino(C1-C6)alkyl;
or R12 and R13, together with the nitrogen to which they are attached, form a 3-8 membered ring optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C6)alkoxy(C1-C3)alkyl, wherein ring A contains 0 to 3 heteroatoms, which are independently selected from O, N and S, wherein when the heteroatom is nitrogen, the nitrogens is substituted with —H, (C1-C3)alkyl or halo(C1-C3)alkyl, and when the heteroatom is sulfur, the sulfurs is optionally mono or di-oxygenated;
R14 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8)cycloalkyl, cycloheteroalkyl(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl, aryl(C1-C6)alkyl, heteroaryl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy;
R15 is —H or (C1-C6)alkyl;
R16 and R17 are each independently —H or (C1-C3)alkyl;
R18 is —H or (C1-C3)alkyl;
i is 0, 1 or 2;
p is 1 or 2;
m is 1 or 2; and
n is 1 or 2.
One embodiment of the invention is a pharmaceutical composition comprising a pharmaceutically acceptable carrier or diluent and a BACE inhibitor disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof).
Another embodiment of the invention is a method of inhibiting BACE activity in a subject in need of such treatment. The method comprises administering to the subject an effective amount of a BACE inhibitor disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof).
Another embodiment of the invention is a method of treating a BACE mediated disorder in a subject. The method comprises administering to the subject an effective amount of a BACE inhibitor disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof).
Another embodiment of the invention is a method of treating a disorder selected from the group consisting of Alzheimer's disease, cognitive impairment, Down's Syndrome, HCHWA-D, cognitive decline, senile dementia, cerebral amyloid angiopathy, degenerative dementia, other neurodegenerative disorders, and glaucoma in a subject in need of such treatment comprising administering to the subject an effective amount of a compound disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′) or a pharmaceutically acceptable salt thereof).
Another embodiment of the invention is the use of a BACE inhibitor disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof) for the manufacture of a medicament for inhibiting BACE activity in a subject.
Another embodiment of the invention is the use of a BACE inhibitor disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof) for the manufacture of a medicament for treating a BACE mediated disorder in a subject.
Another embodiment of the invention is the use of a compound disclosed herein (e.g., a compound represented by Structural Formula (I) or (I′), or a pharmaceutically acceptable salt thereof) for the manufacture of a medicament for treating a disorder selected from the group consisting of Alzheimer's disease, cognitive impairment, Down's Syndrome, HCHWA-D, cognitive decline, senile dementia, cerebral amyloid angiopathy, degenerative dementia, other neurodegenerative disorders, and glaucoma in a subject.
The present invention is directed to compounds represented by the Structural Formula (I) or a pharmaceutically acceptable salt thereof. Values and particular values for the variables in Structural Formula I or an enantiomer, a diastereomer, a tautomer, or a pharmaceutically acceptable salt thereof are provided in the following paragraphs. It is understood that the invention encompasses all combinations of the substituent variables (i.e., R1, R2, R3, etc.) defined herein. For Structural Formula (I):
or an enantiomer, a diastereomer or a pharmaceutically acceptable salt thereof:
R1 is —H, (C1-C6)alkyl, aryl(C1-C6)alkyl or heteroaryl(C1-C6)alkyl. In one embodiment R1 is —H, (C1-C6)alkyl or benzyl. In another embodiment, R1 is —H.
each R2 is independently selected from a) —H, —F, —Cl, —Br, and —CN and b) (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl.
In one embodiment, R2 is —H, —Br, —F, —Cl, (C1-C6)alkyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl.
In another particular embodiment, R2 is —H, —Cl, —Br or —F.
In another particular embodiment, R2 is (C1-C6)alkyl. More particularly, R2 is (C1-C3)alkyl.
In another particular embodiment, R2 is a (C2-C6) alkynyl optionally substituted with —F, —Cl, —Br, —CN, —OR5, —SR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl or heteroaryl. More particularly, R2 is a (C2-C6) alkynyl optionally substituted with (C1-C6)alkyl or (C3-C8)cycloalkyl.
In another particular embodiment, R2 is phenyl optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. More specifically, the substituents are independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylthio, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl.
In another particular embodiment, R2 is pyridinyl, thiophenyl, pyrrolyl, pyrimidinyl, cyclohexyl, or thiazolyl, each optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. More particularly, the substituents are independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C3)alkyl, a 5-6 membered aryl or heteroaryl. Even more specifically, the substituents are independently selected from the group —F, —Cl, —Br, —CN, (C1-C3)alkyl, pyrrolyl and imidazolyl.
In another particular embodiment, R2 is phenoxy or benzyloxy, each optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. More particularly, R2 is unsubstituted phenoxy or benzyloxy.
R3 and R4 are each independently —H, —F, —Br, —Cl or (C1-C6)alkyl optionally substituted with an aryl group or a heteraryl group. In a particular embodiment, R3 and R4 are both —H. In another particular embodiment, R3 and R4 are independently —H, —F or methyl. In another particular embodiment, one of R3 and R4 are —H, the other is a (C1-C6)alkyl optionally substituted with a phenyl group, where the phenyl group is optionally substituted with 1-3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkyl and halo(C1-C6)alkyl.
R5 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, (C3-C7) cycloheteroalkyl, aryl, heteroaryl, or benzyl, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C3)alkoxy(C1-C6)alkyl. In a particular embodiment, R5 is (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C7)cycloheteroalkyl or benzyl. In a more particular embodiment, R5 is (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, pyrrolidinyl or benzyl. More particular, R5 is methyl, ethyl, propyl, butyl, methoxypropyl, methoxyethyl, benzyl or pyrrolidinyl.
each R6 and R7 are independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8) cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy(C1-C6)alkyl. In a particular embodiment, R6 and R7 are each independently —H or (C1-C6)alkyl. In another particular embodiment, R6 and R7 are both —H.
In one embodiment, each R8 and R9 are independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C7)cycloheteroalkyl.
In a particular embodiment, R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, phenyl or heteraryl, each of which optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl, (C3-C8)cycloheteroalkyl, phenyloxy and benzyloxy.
In another particular embodiment, R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. More particularly, R8 and R9 are both —H, methyl or hydroxymethyl.
In another embodiment, one of R8 and R9 is —H, the other one is a (C1-C6)alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C6)alkyl and (C3-C8)cycloheteroalkyl. Even more particularly, one of R8 and R9 is —H, the other one is a (C1-C3)alkyl optionally substituted (C3-C8)cycloheteroalkyl (preferrably a tetrahydrofuran or tetrahydropyran).
In another embodiment, one of R8 and R9 is —H, the other one is a (C2-C6)alkenyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C3)alkyl and hydroxy(C1-C3)alkyl.
In another particular embodiment, one of R8 and R9 is —H and the other is unsubstituted phenyl. In another particular embodiment, one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl. More particularly, the substituents independently selected from —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy.
In another particular embodiment, one of R8 and R9 is —H and the other is (C3-C14)cyloalkyl (preferrably monocyclic (C3-C8)cycloalkyl such as cyclopentyl and cyclohexyl, or bicyclic fused (C9-C14)cycloalkyl, such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), (C3-C13)cycloheteroalkyl (preferrably monocyclic (C3-C7)cycloheteroalkyl such as tetrahydrofuran, tetrahydropyran and piperidine, or bicyclic fused or bridged (C8-C13)cycloheteroalkyl such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. More particularly, one of R8 and R9 is —H and the other is unsubstituted (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl). In another more particular embodiment, one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each of which is optionally substituted with (C1-C6)alkyl, preferably methyl.
In another embodiment, R8 and R9, together with the carbon to which they are attached, form ring A, which is a 3-14 membered monocyclic ring, 9-14 membered bicyclic ring or 9-14 membered polycyclic ring, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. In a particular embodiment, ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. In a particular embodiment, ring A is a 5-7 membered monocycle ring optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy and (C1-C3)alkylcarbonyl, in another particular embodiment, ring A is a 9-14 membered bicyclic fused or bicyclic bridged ring optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy and (C1-C3)alkylcarbonyl. In another particular embodiment, ring A is selected from tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy and (C1-C3)alkylcarbonyl.
R11 is —H, (C1-C6)alkyl or halo(C1-C6)alkyl. In a particular embodiment, R11 is —H.
Each R12 and R13 are independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, amino(C1-C6)alkyl, (C1-C3)alkylamino(C1-C6)alkyl, or di(C1-C3)alkylamino(C1-C6)alkyl. In a particular embodiment, R12 and R13 are independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, hydroxy(C1-C3)alkyl, cyano(C1-C3)alkyl, or di(C1-C3)alkylamino(C1-C3)alkyl. More particularly, R12 and R13 are independently —H, methyl, ethyl, propyl, butyl, methoxyethyl, cyanoethyl, or dimethylaminoethyl.
R14 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8)cycloalkyl, cycloheteroalkyl(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl, aryl(C1-C6)alkyl, heteroaryl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy. In a particular embodiment, R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. In another particular embodiment, R14 is ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl. In another particular embodiment, R14 is methyl.
R15 is —H or (C1-C6)alkyl. In a particular embodiment, R15 is —H.
R16 and R17 are each independently —H or (C1-C3)alkyl. In a particular embodiment, R16 and R17 are both —H.
R18 is —H or (C1-C3)alkyl. In a particular embodiment, R18 is —H.
X is —O—, —S—, —SO—, —SO2—, —CH2O—, or —OCH2—. In a particular embodiment, X is —O—. In another particular embodiment, X is —S—. In another particular embodiment, X is —SO—. In another particular embodiment, X is —SO2—.
Y is —C(R8R9)—.
W is —N(R14)—, —S—, or —O—. In a particular embodiment, W is —N(R14)—.
Z is —C(═O)—, —C(═S)—, —C(═NR15)—, —O—, —C(═O)C(R16R17)—, —C(═S)C(R16R17)—, —C(═NR15)C(R16R17)—, —N(R18)—, or —(CR16R17)m—. In a particular embodiment, Z is —O—. In another particular embodiment, Z is —C(═O)—.
i is 0, 1 or 2;
p is 1 or 2. In a particular embodiment, p is 1.
m is 1 or 2.
n is 1 or 2. In a particular embodiment, n is 1.
One embodiment of the present invention is directed to compounds represented by the Structural Formula (I′) or a pharmaceutically acceptable salt thereof. Values and particular values for the variables in Structural Formula (I′) or an enantiomer, a diastereomer, a tautomer, or a pharmaceutically acceptable salt thereof are provided in the following paragraphs. It is understood that the invention encompasses all combinations of the substituent variables (i.e., R1, R2, R3, etc.) defined herein. For Structural Formula (I′):
or an enantiomer, a diastereomer or a pharmaceutically acceptable salt thereof:
R1 is —H, (C1-C6)alkyl, aryl(C1-C6)alkyl or heteroaryl(C1-C6)alkyl. In one embodiment R1 is —H, (C1-C6)alkyl or benzyl. In another embodiment, R1 is —H.
R2 is a) —H, —F, —Cl, —Br, or —CN or b) (C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl and aryl.
In one embodiment, R2 is —H, —Br, —F, —Cl, (C1-C6)alkyl, (C3-C8)cycloalkyl, aryl, heteroaryl, phenoxy, or benzyloxy, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —COOR5, —CONR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —COR5, (C1-C3)alkyl, halo(C1-C3)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, or (C1-C6)alkoxy(C1-C3)alkyl.
In another particular embodiment, R2 is —H, —Cl, —Br or —F.
In another particular embodiment, R2 is (C1-C6)alkyl. More particularly, R2 is (C1-C3)alkyl.
In another particular embodiment, R2 is phenyl optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5; (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C6)alkoxy(C1-C3)alkyl.
In another particular embodiment, R2 is pyridinyl, thiophenyl, pyrrolyl, pyrimidinyl or cyclohexyl, each optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl and aryl. More particularly, the substituents are independently selected from the group consisting of —F, —Cl, —Br, —CN and (C1-C3)alkyl.
In another particular embodiment, R2 is phenoxy or benzyloxy, each optionally substituted with 1-3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, or (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, and (C1-C6)alkoxy(C1-C3)alkyl. More particularly, R2 is unsubstituted phenoxy or benzyloxy.
R3 and R4 are each independently —H, —F, —Br, —Cl or (C1-C6)alkyl. In a particular embodiment, R3 and R4 are both —H. In another particular embodiment, R3 and R4 are independently —H, —F or methyl.
R5 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, (C3-C7) cycloheteroalkyl, aryl, heteroaryl, or benzyl, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C3)alkoxy(C1-C6)alkyl. In a particular embodiment, R5 is (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, (C3-C7)cycloheteroalkyl or benzyl. In a more particular embodiment, R5 is (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, pyrrolidinyl or benzyl. More particular, R5 is methyl, ethyl, propyl, butyl, methoxypropyl, methoxyethyl, benzyl or pyrrolidinyl.
R6 and R7 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8) cycloalkyl, (C3-C8)cycloalkyl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy(C1-C6)alkyl. In a particular embodiment, R6 and R7 are each independently —H or (C1-C6)alkyl. In another particular embodiment, R6 and R7 are both —H.
In one embodiment, R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8) cycloalkyl, (C3-C7)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. In a particular embodiment, R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C3-C8) cycloalkyl, (C3-C7)cycloheteroalkyl, phenyl or heteraryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. In another particular embodiment, R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. More particularly, R8 and R9 are both —H, methyl or hydroxymethyl. In another particular embodiment, one of R8 and R9 is —H and the other is unsubstituted phenyl. In another particular embodiment, one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. More particularly, the substituents independently selected from —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy. In another particular embodiment, one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. More particularly, one of R8 and R9 is —H and the other is unsubstituted (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl). In another more particular embodiment, one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each of which is optionally substituted with (C1-C6)alkyl, preferably methyl.
In another embodiment, R8 and R9, together with the carbon to which they are attached, form a substituted 3-8 membered ring (ring A) optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy and (C1-C6)alkoxy(C1-C3)alkyl; wherein ring A contains 0 to 3 heteroatoms, which are selected from O, N, S; wherein when the heteroatom is nitrogen, the nitrogen is substituted with —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl, and when the heteroatom is sulfur, the sulfur is optionally mono- or di-oxygenated. In a particular embodiment, ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. In a particular embodiment, ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, or piperidine, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkylcarbonyl.
R11 is —H, (C1-C6)alkyl or halo(C1-C6)alkyl. In a particular embodiment, R11 is —H.
R12 and R13 are each independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C6)alkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, amino(C1-C6)alkyl, (C1-C3)alkylamino(C1-C6)alkyl, or di(C1-C3)alkylamino(C1-C6)alkyl. In a particular embodiment, R12 and R13 are independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, hydroxy(C1-C3)alkyl, cyano(C1-C3)alkyl, or di(C1-C3)alkylamino(C1-C3)alkyl. More particularly, R12 and R13 are independently —H, methyl, ethyl, propyl, butyl, methoxyethyl, cyanoethyl, or dimethylaminoethyl.
R14 is —H, (C1-C6)alkyl, halo(C1-C6)alkyl, (C3-C8)cycloalkyl, cycloheteroalkyl(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl, aryl(C1-C6)alkyl, heteroaryl(C1-C6)alkyl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl and (C1-C3)alkoxy. In a particular embodiment, R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. In another particular embodiment, R14 is ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl. In another particular embodiment, R14 is methyl.
R15 is —H or (C1-C6)alkyl. In a particular embodiment, R15 is —H.
R16 and R17 are each independently —H or (C1-C3)alkyl. In a particular embodiment, R16 and R17 are both —H.
R18 is —H or (C1-C3)alkyl. In a particular embodiment, R18 is —H.
X is —O—, —S—, —SO—, —SO2—, —CH2O—, or —OCH2—. In a particular embodiment, X is —O—. In another particular embodiment, X is —S—. In another particular embodiment, X is —SO—. In another particular embodiment, X is —SO2—.
Y is —C(R8R9)—.
W is —N(R14)—, —S—, or —O—. In a particular embodiment, W is —N(R14)—.
Z is —C(═O)—, —C(═S)—, —C(═NR15)—, —O—, —C(═O)C(R16R17)—, —C(═S)C(R16R17)—, —C(═NR15)C(R16R17)—, —N(R18)—, or —(CR16R17)m—. In a particular embodiment, Z is —O—. In another particular embodiment, Z is —C(═O)—.
i is 0, 1 or 2;
p is 1 or 2. In a particular embodiment, p is 1.
m is 1 or 2.
n is 1 or 2. In a particular embodiment, n is 1.
In a 1st specific embodiment, the compound of the present invention is represented by Structural Formula (II):
Ring A is an optionally substituted 3-14 membered monocyclic ring, 9-14 membered bicyclic ring or 9-14 membered polycyclic ring. Values and particular values for the remainder of the variables in Structural Formula (II) are as described above for Structural Formula (I). Ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy.
Alternatively, Ring A is an optionally substituted 3-8 membered ring containing 0 to 3 heteroatoms, which are independently selected from O, N and S; wherein when the heteroatom is nitrogen, the nitrogen is substituted with —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl, and when the heteroatom is sulfur, the sulfur is optionally mono- or di-oxygenated. Values and particular values for the remainder of the variables in Structural Formula (II) are as described above for Structural Formula (I′). Ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy.
In a 2nd specific embodiment, the compound of the present invention is represented by the following Structural Formulas:
Values and particular values for Structural Formulas (III), (IV), (V), (VI), (VII) and (XIV) are as described above for Structural Formula (II) in the 1st specific embodiment. More specifically, R2 is independently —H, —F, —Cl or —Br and p is 2.
In a 3rd specific embodiment, the compound of the present invention is represented by the following Structural Formulas:
Values and particular values for Structural Formulas (IIIa), (IVa), (Va), (VIa), (VIIa) and (XIVa) are as described above for Structural Formula (II).
In a more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —O—, and the values and specific values of the remainder of the variable are as described in the 3rd specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIa) and (XIVa), X is —S—, and the values and specific values of the remainder of the variable are as described above in the 3rd specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO—, and the values and specific values of the remainder of the variable are as described above in the 3rd specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO2—, and the values and specific values of the remainder of the variable are as described above in the 3rd specific embodiment.
In a 4th specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl, and the values and specific values of the remainder of the variable are as described above in the 3rd specific embodiment.
In a more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl and X is —O—. Values and specific values of the remainder of the variable are as described above in the 4th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl and X is —S—. Values and specific values of the remainder of the variable are as described above in the 4th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl and X is —SO—. Values and specific values of the remainder of the variable are as described above in the 4th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl and X is —SO2—. Values and specific values of the remainder of the variable are as described above in the 4th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), ring A a 5-7 membered monocyclic ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIa)-(VIa) and (XIVa) are as described above in the 4th specific embodiment. In a even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), ring A is a 9-14 membered bicyclic fused or bicyclic bridged ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIa)-(VIa) are as described above in the 4th specific embodiment. In a even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), ring A is selected from tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIa)-(VIa) are as described above in the 4th specific embodiment. In a even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIa), (IVa), (VIa), and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. Values and specific values for the remainder of the variables in Structural Formulas (IIIa), (IVa), (VIa), and (XIVa), are as described above in the 4th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and R14 is ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl. In another even more specific embodiment, X is —O—; and R14 is methyl.
In another more specific embodiment, for compounds of Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and ring A is selected from tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), are as described above in the 4th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R14 is ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl; and ring A is unsubstituted tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, or piperidine. In another even more specific embodiment, X is —O—; R14 is methyl; and ring A is unsubstituted tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-M-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane.
In a 5th specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), R2 is (C3-C8)cycloalkyl, (C3-C8)cycloheteroalkyl, heteroaryl, phenoxy or benzyloxy, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —SR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. Values and specific values of the remainder of the variable are as described in the 3rd specific embodiment. More specifically, R2 is cyclohexyl, pyrrolidinyl, pyridinyl, pyrimidinyl, thiophenyl or thiazolyl. Even more specifically, the substituents are independently selected from —F, —Cl, —Br, —CN, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, phenyl and 5-6 membered heteroaryl (preferrably pyridine or pyrimidine).
In a more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —O—, and the values and specific values of the remainder of the variable are as described in the 5th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —S—, and the values and specific values of the remainder of the variable are as described in the 5th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO—, and the values and specific values of the remainder of the variable are as described in the 5th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO2—, and the values and specific values of the remainder of the variable are as described in the 5th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), ring A a 5-7 membered monocyclic ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIa)-(VIa) and (XIVa) are as described above in the 5th specific embodiment. In a even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more embodiment, for compounds of Structural Formulas (IIa)-(VIa) and (XIVa), ring A is a 9-14 membered bicyclic fused or bicyclic bridged ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIa)-(VIa) are as described above in the 5th specific embodiment. In a even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), ring A is selected from tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIa)-(VIIa) are as described above in the 5th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (Ina), (IVa), (VIa) and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. Values and specific values for the remainder of the variables in Structural Formulas (Ina), (IVa) and (VIa) are as described above in the 5th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and R14 is methyl, ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy and (C1-C3)alkylcarbonyl. Values and specific values for the remainder of the variables in Structural Formulas (IIIa), (IVa), (VIa) and (XIVa) are as described above in the 5th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R14 is methyl, ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl; ring A is unsubstituted tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane; R3 and R4 are —H; and R1 is —H.
In a 6th specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa), R2 is aryl and values and specific values for the remainder of the variables are as described above in the 3rd specific embodiment. More specifically, R2 is phenyl.
In a more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —O—, and values and specific values for the remainder of the variables are as described above in the 6th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —S—, and values and specific values for the remainder of the variables are as described above in the 6th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO—, and values and specific values for the remainder of the variables are as described above in the 6th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), X is —SO2—, and values and specific values for the remainder of the variables are as described above in the 6th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IIIa)-(VIIa) and (XIVa), ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIa)-(VIIa) and (XIVa) are as described above in the 6th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. Values and specific values for the remainder of the variables in Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), are as described above in the 6th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and R14 is methyl, ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl; R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIa), (IVa), (VIa) and (XIVa), are as described above in the 6th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; R14 is methyl, ethyl, propyl, cyclohexylmethyl, cyclopropylethyl, trifluoroethyl, or benzyl; ring A is unsubstituted tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane; R3 and R4 are —H; and R1 is —H.
In a 7th specific embodiment, the compounds of the present invention are represented by the following Structural Formulas:
R10 is —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)1R5, —NR11S(═O)1R5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C6)alkoxy(C1-C3)alkyl, aryl or heteroaryl, s is 0, 1, 2 or 3. Values and specific values for the remainder of the variables in Structural Formulas (IIIb)-(VIIb) and (XIVb) are as described above for Structural Formula (II).
In a more specific embodiment, for compounds of Structural Formulas (IIb)-(VIb) and (XIVb), ring A a 5-7 membered monocyclic ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIb)-(VIb) and (XIVb) are as described above in the 7th specific embodiment. In a even more specific embodiment, R3 and R4 are —H; and R1 is —H.
In another more embodiment, for compounds of Structural Formulas (IIb)-(VIb) and (XIVb), ring A is a 9-14 membered bicyclic fused or bicyclic bridged ring containing 0 to 2 heteratoms independently selected from O, S and N, wherein ring A is optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIb)-(VIb) and (XIVb) are as described above in the 7th specific embodiment. In a even more specific embodiment, R3 and R4 are —H; and R1 is —H.
In another more specific embodiment, for compounds of Structural Formulas (IIIb)-(VIIb) and (XIVb), ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIb)-(VIIb) and (XIVb) are as described above in the 7th specific embodiment. Even more specifically, R3 and R4 are —H.
In a more specific embodiment, for compounds of Structural Formulas (IIIb), (IVb), (VIb) and (XIVb), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl. Values and specific values for the remainder of the variables in Structural Formulas (IIIb), (IVb), (VIb) and (XIVb), are as described above in the 7th specific embodiment. Even more specifically, R14 is methyl.
In another more specific embodiment, for compounds of Structural Formulas (IVb), (IVb), (VIb) and (XIVb), R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables in Structural Formulas (IIIb), (IVb), (VIb) and (XIVb) are as described above in the 7th specific embodiment. Even more specifically, R14 is methyl, R1 is —H, and ring A is unsubstituted tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane.
In an 8th specific embodiment, for compounds of Structural Formulas (IIIb)-(VIIb) and (XIVb), the values for the variables are defined as the following:
R10 is —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5; (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, or (C1-C6)alkoxy(C1-C3)alkyl;
s is 0, 1 or 2;
ring A is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-M-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of (C1-C6)alkyl, halo(C1-C6)alkyl, (C1-C6)alkoxy, (C1-C3)alkylcarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy;
R1 is —H;
R3 and R4 are —H;
R5 is (C1-C6)alkyl or (C1-C3)alkoxy(C1-C3)alkyl;
R6 and R7 are —H;
R11 is —H;
R12 and R13 are independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, hydroxy(C1-C3)alkyl, cyano(C1-C3)alkyl, or di(C1-C3)alkylamino(C1-C3)alkyl;
R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and i is 0, 1, or 2.
In a more specific embodiment, for compounds of Structural Formulas (IIIb)-(VIIb) and (XIVb), R10 is —F, —Cl, —Br, —CN, —CF3, or —OR5; and R14 is methyl. Values and specific values for the remainder of the variables are as described above in the 8th specific embodiment.
In a 9th specific embodiment, the compounds of the present invention are represented by the following Structural Formulas:
wherein R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, aryl, heteroaryl, (C3-C8) cycloalkyl and (C3-C7)cycloheteroalkyl. Values and specific values for the remainder of the variables are as described above for Structural Formula (I).
Alternatively, for compounds represented by Structural Formula (VIII), R8 and R9 are each independently —H, (C1-C6)alkyl, hydroxy(C1-C6)alkyl, halo(C1-C6)alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C3-C8) cycloalkyl, (C3-C7)cycloheteroalkyl, aryl or heteroaryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. Values and specific values for the remainder of the variables are as described above for Structural Formula (I′).
In a 10th specific embodiment, the compounds of the present invention are represented by the following Structural Formulas:
Values and specific values for variables for Structural Formulas (IX)-(XIII) and (XV) are as described above for Structural Formula (VIII) in the 9th specific embodiment. In a more specific embodiment, X is —O—. In another more specific embodiment, X is —O—, R2 is independently —H, —F, —Cl or —Br and p is 2.
In an 11th specific embodiment, compounds of the present invention are represented by the following Structural Formulas:
Values and specific values for variables for Structural Formulas (IXa)-(XIIIa) and (XVa) are as described above for Structural Formula (VIII) in the 9th specific embodiment
In a more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —O— and the values and specific values of the remainder of the variables are as described above in the 11th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —S—, and the values and specific values of the remainder of the variables are as described above in the 11th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO—, and the values and specific values of the remainder of the variables are as described in the 11th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO2—, and the values and specific values of the remainder of the variables are as described in the 11th specific embodiment.
In a 12th specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R2 is —H, —Cl, —Br, —F or (C1-C6)alkyl, and the values and specific values of the remainder of the variable are as described above in the 11th specific embodiment.
In a more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —O—, and the values and specific values of the remainder of the variable are as described above in the 12th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —S—, and the values and specific values of the remainder of the variable are as described above in the 12th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO—, and the values and specific values of the remainder of the variable are as described above in the 12th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO2—, and the values and specific values of the remainder of the variable are as described above in the 12th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R8 and R9 are each independently —H, (C1-C6)alkyl, (C2-C6)alkenyl, hydroxy(C1-C6)alkyl, (C3-C8) cycloalkyl, (C3-C7)cycloheteroalkyl, phenyl or heteraryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, aryl, heteroaryl, (C3-C8) cycloalkyl and (C3-C7)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—, and R8 and R9 are —H, methyl or hydroxymethyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C1-C6)alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C6)alkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. More particularly, X is —O—. Even more particularly, one of R8 and R9 is —H, the other one is a (C1-C3)alkyl optionally substituted (C3-C8)cycloheteroalkyl (preferrably a tetrahydrofuran and tetrahydropyran) and X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C2-C6)alkenyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. More particularly, X is —O—. Even more particularly, substituents are selected from the group consisting of (C1-C3)alkyl and hydroxy(C1-C3)alkyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is unsubstituted phenyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting independently selected from —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy, ethoxy, acetyl, ethoxycarbonyl and hydroxymethyl.
In another particular embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, hydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicycic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicyclic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. In another even more specific embodiment, X is —O—; one of R8 and R9 is —H and the other is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxyl.
In another particular embodiment, for compounds of Structural Formula (IXa)-(XIIIa), one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 12th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 (C1-C6)alkyl.
In a 13th specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R2 is (C3-C8)cycloalkyl, (C3-C8)cycloheteroalkyl, heteroaryl, phenoxy or benzyloxy, each of which is optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, —OR5, —SR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C3-C8)cycloalkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxyl, (C1-C6)alkoxy(C1-C3)alkyl, aryl and heteroaryl. Values and specific values of the remainder of the variable are as described in the 11th specific embodiment. Even more specifically, R2 is cyclohexyl, pyrrolidinyl, pyridinyl, pyrimidinyl, thiophenyl or thiazolyl. Even more specifically, the substituents are independently selected from —F, —Cl, —Br, —CN, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C6)alkoxy(C1-C3)alkyl, phenyl and 5-6 membered heteroaryl.
In a more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —O—, and the values and specific values of the remainder of the variable are as described above in the 13th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —S—, and the values and specific values of the remainder of the variable are as described above in the 13th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO—, and the values and specific values of the remainder of the variable are as described above in the 13th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO2—, and the values and specific values of the remainder of the variable are as described above in the 13th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R8 and R9 are each independently —H, (C1-C6)alkyl, (C2-C6)alkenyl, hydroxy(C1-C6)alkyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, phenyl or heteraryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, aryl, heteroaryl, (C3-C8) cycloalkyl and (C3-C7)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. Even more specifically, X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa), R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and R8 and R9 are —H, methyl or hydroxymethyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C1-C6)alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C6)alkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. More particularly, X is —O—. Even more particularly, one of R8 and R9 is —H, the other one is a (C1-C3)alkyl optionally substituted (C3-C8)cycloheteroalkyl (preferrably a tetrahydrofuran and tetrahydropyran) and X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C2-C6)alkenyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. More particularly, X is —O—. Even more particularly, substituents are selected from the group consisting of (C1-C3)alkyl and hydroxy(C1-C3)alkyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is unsubstituted phenyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. Even more specifically, X is —O—.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy, ethoxy, acetyl, ethoxycarbonyl and hydroxymethyl.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicyclic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicyclic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. In another even more specific embodiment, X is —O—; one of R8 and R9 is —H and the other is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxyl.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa), one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 13th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 (C1-C6)alkyl.
In a 14th specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R2 is aryl and the values and specific values of the remainder of the variable are as described in the 11th specific embodiment. More specifically, R2 is phenyl. In another more specific embodiment, R2 is indolinyl or benzoimidazole (connected through the benzene ring).
In a more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —O—, and the values and specific values of the remainder of the variable are as described above in the 14th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —S—, and the values and specific values of the remainder of the variable are as described above in the 14th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO—, and the values and specific values of the remainder of the variable are as described above in the 14th specific embodiment.
In a more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), X is —SO2—, and the values and specific values of the remainder of the variable are as described above in the 14th specific embodiment.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R8 and R9 are each independently —H, (C1-C6)alkyl, (C2-C6)alkenyl, hydroxy(C1-C6)alkyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, phenyl or heteraryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, aryl, heteroaryl, (C3-C8) cycloalkyl and (C3-C7)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. Even more specifically, X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and R8 and R9 are —H, methyl or hydroxymethyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C1-C6)alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C6)alkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. More particularly, X is —O—. Even more particularly, one of R8 and R9 is —H, the other one is a (C1-C3)alkyl optionally substituted (C3-C8)cycloheteroalkyl (preferrably a tetrahydrofuran and tetrahydropyran) and X is —O—.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H, the other one is a (C2-C6)alkenyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. More particularly, X is —O—. Even more particularly, substituents are selected from the group consisting of (C1-C3)alkyl and hydroxy(C1-C3)alkyl.
In another more specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa)) and (XVa), one of R8 and R9 is —H and the other is unsubstituted phenyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. Even more specifically, X is —O—.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy, ethoxy, acetyl, ethoxycarbonyl and hydroxymethyl.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa) and (XVa), one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicyclic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. In another even more specific embodiment, X is —O—; one of R8 and R9 is —H and the other is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxyl.
In another specific embodiment, for compounds of Structural Formula (IXa)-(XIIIa), one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 14th specific embodiment. In an even more specific embodiment, X is —O—. In another even more specific embodiment, X is —O—; and one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 (C1-C6)alkyl.
In a 15th specific embodiment, the compounds of the present invention are represented by the following Structural Formulas:
wherein R10 is —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —C(═O)OR5, —C(═O)NR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —C(═O)R5, (C1-C6)alkyl, (C2-C6)alkenyl, halo(C1-C6)alkyl, (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, (C1-C6)alkoxy(C1-C3)alkyl, aryl or heteroaryl; and s is 0, 1, 2 or 3. Values and specific values for the remainder of the variables for Structural Formulas (IXb)-(XIIIb), (XVb), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), are as described above in the 11th specific embodiment
In a more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), R8 and R9 are each independently —H, (C1-C6)alkyl, (C2-C6)alkenyl, hydroxy(C1-C6)alkyl, (C3-C14) cycloalkyl, (C3-C13)cycloheteroalkyl, phenyl or heteraryl, each optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, aryl, heteroaryl, (C3-C14) cycloalkyl and (C3-C13)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), R8 and R9 are both —H, (C1-C3)alkyl or hydroxy(C1-C3)alkyl. More specifically, R8 and R9 are —H, methyl or hydroxymethyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H, the other one is a (C1-C6)alkyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. More particularly, substituents are selected from the group consisting of (C1-C6)alkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment. Even more particularly, one of R8 and R9 is —H, the other one is a (C1-C3)alkyl optionally substituted (C3-C8)cycloheteroalkyl (preferrably a tetrahydrofuran and tetrahydropyran).
In another more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H, the other one is a (C2-C6)alkenyl optionally substituted with 1 to 3 substituents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C3-C8) cycloalkyl and (C3-C8)cycloheteroalkyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment. Even more particularly, substituents are selected from the group consisting of (C1-C3)alkyl and hydroxy(C1-C3)alkyl.
In another more specific embodiment, for compounds of Structural Formula (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H and the other is unsubstituted phenyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment.
In another specific embodiment, for compounds of Structural Formulas (IXb(IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H and the other is phenyl substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl. More specifically, the substituents are independently selected from —F, —Cl, —Br, —CN, trifluoromethyl, methoxy, trifluoromethoxy, ethoxy, acetyl, ethoxycarbonyl and hydroxymethyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment.
In another specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H and the other is monocylic (C3-C8)cyloalkyl (such as cyclopentyl and cyclohexyl), bicyclic fused (C9-C14)cycloalkyl (such as 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene), monocylic (C3-C7)cycloheteroalkyl (such as tetrahydrofuran, tetrahydropyran and piperidine), bicyclic fused or bicyclic bridged (C8-C13)cycloheteroalkyl (such as 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, and 2-oxabicyclo[2.2.2]octane) or heteroaryl (preferrably 5-6 membered heteroaryl such as pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxy. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment. In another even more specific embodiment, one of R8 and R9 is —H and the other is tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxyl. Values and specific values for the remainder of the variables are as described above in the specific embodiment.
In another specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (IXc)-(XIIIc), (IXd)-(XIIId) and (IXe)-(XIIIe), one of R8 and R9 is —H and the other is (C3-C8)cyloalkyl (preferrably cyclopentyl and cyclohexyl), (C3-C7)cycloheteroalkyl (preferrably tetrahydrofuran or and tetrahydropyran) or heteroaryl (preferrably pyridinyl or thiophenyl), each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy and halo(C1-C3)alkoxy. More specifically, the substitutents (C1-C6)alkyl. Values and specific values of the remainder of the variables are as described above in the 15th specific embodiment.
In a 16th specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), the variables are as defined below:
R10 is —F, —Cl, —Br, —CN, —OR5, —NR6R7, —S(O)iR5, —NR11S(═O)iR5, —COOR5, —CONR12R13, —NR11C(═O)R5, —C(═S)NR12R13, —COR5; (C2-C6)alkenyl, halo(C1-C6)alkyl, or (C1-C3)alkylsulfonylaminoalkyl, hydroxy(C1-C6)alkyl, cyano(C1-C6)alkyl, (C1-C3)alkylcarbonylamino(C1-C6)alkyl, or (C1-C6)alkoxy(C1-C3)alkyl;
s is 0, 1 or 2;
one of R8 and R9 is —H, the other is selected from the group consisting of phenyl, tetrahydrofuran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each optionally substituted with 1 to 3 substitutents independently selected from the group consisting of —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy, halo(C1-C3)alkoxy, (C1-C3)alkylcarbonyl and (C1-C3)alkoxycarbonyl, 5-6 membered heteroaryl (preferrably pyridine or pyrimidine), phenyl, phenoxy and benzoxy, wherein the phenyl, phenoxy and benzoxy are each optionally substituted with —F, —Cl, —Br, —CN, (C1-C6)alkyl, halo(C1-C6)alkyl, hydroxy(C1-C6)alkyl, (C1-C3)alkoxy or halo(C1-C3)alkoxyl;
R1 is —H;
R3 and R4 are independently selected from the group consisting of —H, —F, —Cl, —Br and (C1-C3)alkyl;
R5 is (C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl or pyrrolidinyl;
R6 and R7 are —H;
R11 is —H;
R12 and R13 are independently —H, (C1-C6)alkyl, (C1-C3)alkoxy(C1-C3)alkyl, hydroxy(C1-C3)alkyl, cyano(C1-C3)alkyl, or di(C1-C3)alkylamino(C1-C3)alkyl;
R14 is (C1-C6)alkyl, halo(C1-C3)alkyl, (C3-C8)cycloalkyl(C1-C3)alkyl or benzyl; and i is 0, 1, or 2.
In a more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), R10 is —CN, —F, —Cl, or —Br; and the remainder of the variables are as described above in the 16th specific embodiment.
In another more specific embodiment, for compounds of Structural Formulas (IXb)-(XIIIb), (XVb), (IXc)-(XIIIc), (XVc), (IXd)-(XIIId), (XVd), (IXe)-(XIIIe) and (XVe), one of R8 and R9 is —H, the other is phenyl, tetrahydropyran, tetrahydropyran, cyclopentane, cyclohexane, cycloheptane, oxepane, 1,3-dioxane, piperidine, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2, dihydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, 5,6,7,8-tetrahydroquinoline, 5,6,7,8-tetrahydroisoquinoline, or 2-oxabicyclo[2.2.2]octane, each of which is unsubstituted; and the remainder of the variables are as described above in the 16th specific embodiment
In another embodiment of the present invention, the compounds are listed in the following table:
Also included in the present invention are all possible stereoisomers of compounds 1-531 depicted above.
When any variable (e.g., aryl, heterocyclyl, R1, R2, etc.) occurs more than once in a compound, its definition on each occurrence is independent of any other occurrence.
“Alkyl” means a saturated aliphatic branched or straight-chain monovalent hydrocarbon radical having the specified number of carbon atoms. Thus, “(C1-C6)alkyl” means a radical having from 1-6 carbon atoms in a linear or branched arrangement. “(C1-C6)alkyl” includes methyl, ethyl, propyl, butyl, pentyl, and hexyl. Also included within the definition of “alkyl” are those alkyl groups that are optionally substituted. Suitable substitutions include, but are not limited to, -halogen, —OH, —CN, alkoxy, amino, cycloalkyl, aryl, heteroaryl, or aryloxy.
“Alkenyl” means branched or straight-chain monovalent hydrocarbon radical containing at least one double bond and having specified number of carbon atoms. Alkenyl may be mono or polyunsaturated, and may exist in the E or Z configuration. Thus, “(C2-C6)alkenyl” means a radical having from 2-6 carbon atoms in a linear or branched arrangement.
“Alkynyl” means branched or straight-chain monovalent hydrocarbon radical containing at least one triple bond and having specified number of carbon atoms. Thus, “(C2-C6)alkynyl” means a radical having from 2-6 carbon atoms in a linear or branched arrangement.
“Cycloalkyl” means a saturated aliphatic cyclic hydrocarbon radical having the specified number of carbon atoms. It can be monocyclic, bicyclic, polycyclic (e.g., tricyclic), fused, bridged, or spiro. For example, monocyclic (C3-C8)cycloalkyl means a radical having from 3-8 carbon atoms arranged in a ring. Monocyclic (C3-C8)cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctane.
Monocyclic ring systems have a single ring structure. They include saturated or unsaturated aliphatic cyclic hydrocarbon rings or aromatic hydrocarbon ring having the specified number of carbon atoms. The monocyclic ring system can optionally contain 1 to 3 heteroatoms in the ring structure and each heteroatom is independently selected from the group consisting O, N and S. When the heteroatom is N, it can be substituted with —H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl (preferrably, —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl), each of which can be optionally substituted with halogen, hydroxy, alkoxy, haloalkyl, alkyl, etc. When the heteroatom is S, it can be optionally mono- or di-oxygenated (i.e. —S(O)— or —S(O)2—). Examples of monocyclic ring system include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctane, azetidine, pyrrolidine, piperidine, piperazine, hexahydropyrimidine, tetrahydrofuran, tetrahydropyran, oxepane, tetrahydrothiophene, tetrahydrothiopyran, isoxazolidine, 1,3-dioxolane, 1,3-dithiolane, 1,3-dioxane, 1,4-dioxane, 1,3-dithiane, 1,4-dithiane, morpholine, thiomorpholine, thiomorpholine 1,1-dioxide, tetrahydro-2H-1,2-thiazine, tetrahydro-2H-1,2-thiazine 1,1-dioxide, and isothiazolidine 1,1-dioxide, tetrahydrothiophene 1-oxide, tetrahydrothiophene 1,1-dioxide, thiomorpholine 1-oxide, thiomorpholine 1,1-dioxide, tetrahydro-2H-1,2-thiazine 1,1-dioxide, and isothiazolidine 1,1-dioxide, pyrrolidin-2-one, piperidin-2-one, piperazin-2-one, and morpholin-2-one.
Bicyclic ring systems have two rings that have at least one ring atom in common Bicyclic ring systems include fused, bridged and spiro ring systems. The two rings can both be aliphatic (e.g., cycloalkyl or cycloheteroalkyl), both be aromatic (e.g., aryl or heteroaryl), or a combination thereof. The bicyclic ring systems can optionally contain 1 to 3 heteroatoms in the ring structure and each heteroatom is independently selected from the group consisting O, N and S. When the heteroatom is N, it can be substituted with H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl (preferrably, —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl), each of which can be optionally substituted with halogen, hydroxy, alkoxy, haloalkyl, alkyl, etc. When the heteroatom is S, it can be optionally mono- or di-oxygenated (i.e. —S(O)— or —S(O)2—).
A fused bicyclic ring system has two rings which have two adjacent ring atoms in common. The two rings can both be aliphatic (e.g., cycloalkyl or cycloheteroalkyl), both be aromatic (e.g., aryl or heteroaryl), or a combination thereof. For example, the first ring can be monocyclic cycloalkyl or moncyclic cycloheteroalkyl, and the second ring can a cycloalkyl, partially unsaturated carbocycle, aryl, heteroaryl or a monocyclic cycloheteroalkyl. For example, the second ring can be a (C3-C6)cycloalkyl, such as cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. Alternatively, the second ring can be an aryl ring, e.g., phenyl. Examples of fused bicyclic ring systems include, but not limited to, 6,7,8,9-tetrahydro-5H-benzo[7]annulene, 2,3-dihydro-1H-indene, octahydro-1H-indene, tetrahydronaphthalene, decahydronaphthalene, indoline, isoindoline, 2,3-dihydro-1H-benzo[d]imidazole, 2,3-dihydrobenzo[d]oxazole, 2,3-dihydrobenzo[d]thiazole, octahydrobenzo[d]oxazole, octahydro-1H-benzo[d]imidazole, octahydrobenzo[d]thiazole, octahydrocyclopenta[c]pyrrole, 3-azabicyclo[3.1.0]hexane, 3-azabicyclo[3.2.0]heptane, 5,6,7,8-tetrahydroquinoline and 5,6,7,8-tetrahydroisoquinoline and 2,3,4,5-tetrahydrobenzo[b]oxepine.
A Spiro bicyclic ring system has two rings which have only one ring atom in common. The two rings can both be aliphatic (e.g., cycloalkyl or cycloheteroalkyl), both be aromatic (e.g., aryl or heteroaryl), or a combination thereof. For example, the first ring can be a monocyclic cycloalkyl or a monocyclic cycloheteroalkyl and the second ring can be a cycloalkyl, partially unsaturated carbocycle, aryl, heteroaryl or a monocyclic cycloheteroalkyl. Examples of spiral bicyclic ring system include, but are not limited to, spiro[2.2]pentane, spiro[2.3]hexane, spiro[3.3]heptane, spiro[2.4]heptane, spiro[3.4]octane, spiro[2.5]octane, azaspiro[4.4]nonane, 7-azaspiro[4.4]nonane, azasprio[4.5]decane, 8-azaspiro[4.5]decane, azaspiro[5.5]undecane, 3-azaspiro[5.5]undecane and 3,9-diazaspiro[5.5]undecane.
A bridged bicyclic ring system has two rings which have three or more adjacent ring atoms in common. The two rings can both be aliphatic (e.g., cycloalkyl or cycloheteroalkyl), both be aromatic (e.g., aryl or heteroaryl), or a combination thereof. For example, the first ring can be a monocyclic cycloalkyl or a monocyclic cycloheteroalkyl and the other ring is a cycloalkyl, partially unsaturated carbocycle, aryl, heteroaryl or a monocyclic cycloheteroalkyl. Examples of bridged bicyclic ring system include, but are not limited to, bicyclo[1.1.0]butane, bicyclo[1.2.0]pentane, bicyclo[2.2.0]hexane, bicyclo[3.2.0]heptane, bicyclo[3.3.0]octane, bicyclo[4.2.0]octane, bicyclo[2.2.1]heptane, bicyclo[2.2.2]octane, bicyclo[3.2.1]octane, bicyclo[3.2.2]nonane, bicyclo[3.3.1]nonane, bicyclo[3.3.2]decane bicyclo[3.3.3]undecane, azabicyclo[3.3.1]nonane, 3-azabicyclo[3.3.1]nonane, azabicyclo[3.2.1]octane, 3-azabicyclo[3.2.1]octane, 6-azabicyclo[3.2.1]octane and azabicyclo[2.2.2]octane, 2-azabicyclo[2.2.2]octane and 2-oxabicyclo[2.2.2]octane.
Polycyclic ring systems have more than two rings (e.g., three rings resulting in a tricyclic ring system) and adjacent rings have at least one ring atom in common. Polycyclic ring systems include fused, bridged and spiro ring systems. A fused polycyclic ring system has at least two rings that have two adjacent ring atoms in common A spiro polycyclic ring system has at least two rings that have only one ring atom in common. A bridged polycyclic ring system has at least two rings that have three or more adjacent ring atoms in common. Examples of polycyclic ring system include, but not limited to, tricyclo[3.3.1.03,7]nonane (noradamantane) and tricyclo[3.3.1.13,7]decane (adamantane) and 2,3-dihydro-1H-phenalene.
“Cycloheteroalkyl” means a saturated 4-12 membered ring containing 1 to 4 heteroatoms, which may be the same or different, selected from N, O or S and optionally containing one or more double bonds. It can be monocyclic, bicyclic, polycyclic (e.g. tricyclic), fused, bridged, or spiro.
When the heteroatom is N, it can be substituted with H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl (preferrably, —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl), each of which can be optionally substituted with halogen, hydroxy, alkoxy, haloalkyl, alkyl, etc. When the heteroatom is S, it can be optionally mono- or di-oxygenated (i.e. —S(O)— or —S(O)2—).
Haloalkyl and halocycloalkyl include mono, poly, and perhaloalkyl groups where the halogens are independently selected from fluorine, chlorine, and bromine
“Heteroaryl” means a monovalent heteroaromatic monocyclic or polycylic ring radical. Heteroaryl rings are 5- and 6-membered aromatic heterocyclic rings containing 1 to 4 heteroatoms independently selected from N, O, and S, and include, but are not limited to furan, thiophene, pyrrole, imidazole, pyrazole, oxazole, isoxazole, thiazole, isothiazole, 1,2,3-triazole, 1,2,4-triazole, 1,3,4-oxadiazole, 1,2,5-thiadiazole, 1,2,5-thiadiazole 1-oxide, 1,2,5-thiadiazole 1,1-dioxide, 1,3,4-thiadiazole, pyridine, pyridine-N-oxide, pyrazine, pyrimidine, pyridazine, 1,2,4-triazine, 1,3,5-triazine, and tetrazole. Bicyclic heteroaryl rings are bicyclo[4.4.0] and bicyclo[4.3.0] fused ring systems containing 1 to 4 heteroatoms independently selected from N, O, and S, and include indolizine, indole, isoindole, benzo[b]furan, benzo[b]thiophene, indazole, benzimidazole, benzthiazole, purine, 4H-quinolizine, quinoline, isoquinoline, cinnoline, phthalazine, quinazoline, quinoxaline, 1,8-naphthyridine, and pteridine.
“Alkoxy” means an alkyl radical attached through an oxygen linking atom. “(C1-C4)-alkoxy” includes methoxy, ethoxy, propoxy, and butoxy.
“Aromatic” means an unsaturated cycloalkyl ring system.
“Aryl” means an aromatic monocyclic, or polycyclic carbocyclic ring system. Aryl systems include, but limited to, phenyl, naphthalenyl, fluorenyl, indenyl, azulenyl, and anthracenyl.
“Hetero” refers to the replacement of at least one carbon atom member in a ring system with at least one heteroatom selected from N, S, and O. A hetero ring may have 1, 2, 3, or 4 carbon atom members replaced by a heteroatom.
“Halogen” used herein refers to fluorine, chlorine, bromine, or iodine.
“Carbocycle” means 3-14 membered saturated or unsaturated aliphatic cyclic hydrocarbon ring.
“Cycloalkene” a unsaturated and non-aromatic aliphatic cyclic hydrocarbon radical having the specified number of carbon atoms. It can be monocyclic, bicyclic, tricyclic, fused, bridged, or spiro. Thus, (C3-C8)cycloalkene means a radical having from 3-8 carbon atoms arranged in a ring. (C3-C8)cycloalkene includes cyclobutene, cyclopentene, cyclohexene, cycloheptene and cyclooctene.
Ring A is a 3-14 membered monocyclic ring system, 9-14 membered bicyclic ring system or 9-14 membered polycyclic ring system. The rings of the bicyclic and polycyclic ring systems can be fused, bridged or spiral. Ring A can be aromatic (e.g., aryl or heteroaryl) or aliphatic (saturated or unsaturated), provided that when Ring A is a monocyclic ring, it can only be aliphatic. For example, ring A can be a carbocycle such as a cycloalkene (e.g., cyclopentene, cyclohexene, cycloheptene or cyclooctene), a cycloalkane ring or a cycloheteroalkane ring as defined above. Ring A can optionally contain 1 to 3 heteroatoms each independently selected from O, S and N. When the heteroatom is N, it can be substituted with H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl (preferrably, —H, (C1-C6)alkyl, halo(C1-C6)alkyl or (C1-C3)alkylcarbonyl), each of which can be optionally substituted with halogen, hydroxy, alkoxy, haloalkyl, alkyl, etc. When the heteroatom is S, it can be optionally mono- or di-oxygenated (i.e. —S(O)— or —S(O)2—).
The compounds of the invention may be present in the form of pharmaceutically acceptable salts. For use in medicines, the salts of the compounds of the invention refer to non-toxic “pharmaceutically acceptable salts.” Pharmaceutically acceptable salt forms include pharmaceutically acceptable acidic/anionic or basic/cationic salts.
Pharmaceutically acceptable acidic/anionic salts include, the acetate, benzenesulfonate, benzoate, bicarbonate, bitartrate, bromide, calcium edetate, camsylate, carbonate, chloride, citrate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, glyceptate, gluconate, glutamate, glycollylarsanilate, hexylresorcinate, hydrobromide, hydrochloride, hydroxynaphthoate, iodide, isethionate, lactate, lactobionate, malate, maleate, mandelate, mesylate, methylsulfate, mucate, napsylate, nitrate, pamoate, pantothenate, phosphate/diphospate, polygalacturonate, salicylate, stearate, subacetate, succinate, sulfate, tannate, tartrate, teoclate, tosylate, and triethiodide salts.
Salts of the disclosed compounds containing a carboxylic acid or other acidic functional group can be prepared by reacting with a suitable base. Such a pharmaceutically acceptable salt may be made with a base which affords a pharmaceutically acceptable cation, which includes alkali metal salts (especially sodium and potassium), alkaline earth metal salts (especially calcium and magnesium), aluminum salts and ammonium salts, as well as salts made from physiologically acceptable organic bases such as trimethylamine, triethylamine, morpholine, pyridine, piperidine, picoline, dicyclohexylamine, N,N′-dibenzylethylenediamine, 2-hydroxyethylamine, bis-(2-hydroxyethyl)amine, tri-(2-hydroxyethyl)amine, procaine, dibenzylpiperidine, dehydroabietylamine, N,N′-bisdehydroabietylamine, glucamine, N-methylglucamine, collidine, quinine, quinoline, and basic amino acid such as lysine and arginine.
It may be necessary and/or desirable during synthesis to protect sensitive or reactive groups on any of the molecules concerned. Representative conventional protecting groups are described in T. W. Greene and P. G. M. Wuts “Protective Groups in Organic Synthesis” John Wiley & Sons, Inc., New York 1999. Protecting groups may be added and removed using methods well known in the art.
The invention also includes various isomers and mixtures thereof. “Isomer” refers to compounds that have the same composition and molecular weight but differ in physical and/or chemical properties. The structural difference may be in constitution (geometric isomers) or in the ability to rotate the plane of polarized light (stereoisomers).
Certain of the compounds of the present invention may exist in various stereoisomeric or tautomeric forms. Stereoisomers are compounds which differ only in their spatial arrangement. The invention encompasses all such forms, including compounds in the form of essentially pure entiomers, racemic mixtures and tautomers, which includes forms not depicted structurally. When a disclosed compound is named or depicted by structure without indicating stereochemistry, it is understood that the name or structure encompasses all possible stereoisomers, tautomers, geometric isomers or a combination thereof.
Enantiomers are pairs of stereoisomers whose mirror images are not superimposable, most commonly because they contain an asymmetrically substituted carbon atom that acts as a chiral center. “Enantiomer” means one of a pair of molecules that are mirror images of each other and are not superimposable. Diastereomers are stereoisomers that are not related as mirror images, most commonly because they contain two or more asymmetrically substituted carbon atoms. The symbol “*” in a structural formula represents the presence of a chiral carbon center. “R” and “S” represent the configuration of substituents around one or more chiral carbon atoms. Thus, “R*” and “S*” denote the relative configurations of substituents around one or more chiral carbon atoms. When a chiral center is not defined as R or S, a mixture of both configurations is present.
“Racemate” or “racemic mixture” means a compound of equimolar quantities of two enantiomers, wherein such mixtures exhibit no optical activity; i.e., they do not rotate the plane of polarized light.
“Geometric isomer” means isomers that differ in the orientation of substituent atoms in relationship to a carbon-carbon double bond, to a cycloalkyl ring, or to a bridged bicyclic system. Atoms (other than H) on each side of a carbon-carbon double bond may be in an E (substituents are on opposite sides of the carbon-carbon double bond) or Z (substituents are oriented on the same side) configuration.
Atoms (other than H) attached to a carbocyclic ring may be in a cis or trans configuration. In the “cis” configuration, the substituents are on the same side in relationship to the plane of the ring; in the “trans” configuration, the substituents are on opposite sides in relationship to the plane of the ring. A mixture of “cis” and “trans” species is designated “cis/trans”.
The point at which a group or moiety is attached to the remainder of the compound or another group or moiety can be indicated by “” which represents “
”, “
” or “-”.
“R,” “S,” “S*,” “R*,” “E,” “Z,” “cis,” and “trans,” indicate configurations relative to the core molecule.
The compounds of the invention may be prepared as individual isomers by either isomer-specific synthesis or resolved from an isomeric mixture. Conventional resolution techniques include forming the salt of a free base of each isomer of an isomeric pair using an optically active acid (followed by fractional crystallization and regeneration of the free base), forming the salt of the acid form of each isomer of an isomeric pair using an optically active amine (followed by fractional crystallization and regeneration of the free acid), forming an ester or amide of each of the isomers of an isomeric pair using an optically pure acid, amine or alcohol (followed by chromatographic separation and removal of the chiral auxiliary), or resolving an isomeric mixture of either a starting material or a final product using various well known chromatographic methods.
When the stereochemistry of a disclosed compound is named or depicted by structure, the named or depicted stereoisomer is at least 60%, 70%, 80%, 90%, 99% or 99.9% by weight pure relative to the other stereoisomers. When a single enantiomer is named or depicted by structure, the depicted or named enantiomer is at least 60%, 70%, 80%, 90%, 99% or 99.9% by weight optically pure. Percent optical purity by weight is the ratio of the weight of the enantiomer over the weight of the enantiomer plus the weight of its optical isomer.
When a disclosed compound is named or depicted by structure without indicating the stereochemistry, and the compound has at least one chiral center, it is to be understood that the name or structure encompasses one enantiomer of the compound free from the corresponding optical isomer, a racemic mixture of the compound and mixtures enriched in one enantiomer relative to its corresponding optical isomer.
When a disclosed compound is named or depicted by structure without indicating the stereochemistry and has at least two chiral centers, it is to be understood that the name or structure encompasses a diastereomer free of other diastereomers, a pair of diastereomers free from other diastereomeric pairs, mixtures of diastereomers, mixtures of diastereomeric pairs, mixtures of diastereomers in which one diastereomer is enriched relative to the other diastereomer(s) and mixtures of diastereomeric pairs in which one diastereomeric pair is enriched relative to the other diastereomeric pair(s).
The compounds of the invention are BACE inhibitors for treating, preventing or ameliorating disorders or diseases characterized by elevated β-amyloid deposits or β-amyloid levels in a subject. Such diseases or disorders include, but not limited to, Alzheimer's disease, Trisomy 21 (Down's Syndrome), Hereditary Cerebral Hemorrhage with Amyloidosis of the Dutch-type (HCHWA-D), other neurodegenerative disorders and glaucoma. Accordingly, the present invention provides methods for modulating BACE and treating, preventing or ameliorating Alzheimer's disease, Trisomy 21 (Down's Syndrome), Hereditary Cerebral Hemorrhage with Amyloidosis of the Dutch-type (HCHWA-D) and other neurodegenerative disorders. Such methods comprises administering to a patient suffering from, suspected of suffering from or being susceptible to the disease or disorder an effective amount of the compound of Structural Formula (I) or a pharmaceutically acceptable salt thereof.
The present invention also provides a method for the treatment of a disorder related to or associated with excessive BACE activity in a patient in need thereof which comprises administering to said patient an effective amount of the compound of Structural Formula (I) or a pharmaceutically acceptable salt thereof. Representative disorders include Alzheimer's disease, cognitive impairment, Down's Syndrome, HCHWA-D, cognitive decline, senile dementia, cerebral amyloid angiopathy, degenerative dementia, other neurodegenerative disorders, and glaucoma. Certain of these diseases are characterized by production of β-amyloid deposits or neurofibrillary tangles.
The present invention also provides methods for inhibiting the activity of BACE, comprising administering to a subject and/or contacting a receptor thereof with an effective amount of at least one compound of Structural Formula (I) or a pharmaceutically acceptable salt thereof.
The present invention also provides methods of ameliorating β-amyloid deposits in a subject, comprising administering to said subject an effective amount of at least one compound of Structural Formula (I) or a pharmaceutically acceptable salt thereof.
The present invention also provides methods of treating a disorder selected from the group consisting of Alzheimer's disease, cognitive impairment, Down's Syndrome, HCHWA-D, cognitive decline, senile dementia, cerebral amyloid angiopathy, degenerative dementia, other neurodegenerative disorders, and glaucoma in a subject in need of such treatment comprising administering to the subject an effective amount of a compound of Structural Formula (I) or a pharmaceutically acceptable salt thereof. In one embodiment, the disorder is Alzheimer's disease. In another embodiment, the disorder is glaucoma.
A pharmaceutical composition of the invention may, alternatively or in addition to a compound of Formula I or any formula of the invention described herein, comprise a pharmaceutically acceptable salt of a compound of Formula I or a prodrug or pharmaceutically active metabolite of such a compound or salt and one or more pharmaceutically acceptable carriers therefor.
The compositions of the invention are BACE inhibitors. Said compositions can contain compounds having a mean inhibition constant (IC50) against BACE of between about 50 μM to about 0.01 nM; between about 10 μM to about 0.01 nM; between about 5 μM to about 0.01 nM; between about 1 μM to about 0.01 nM; between about 500 nM to about 0.01 nM; between about 100 nM to about 0.01 nM; between about 50 nM to about 0.01 nM; or between about 5 nM to about 0.01 nM.
The invention includes a therapeutic method for treating or ameliorating an BACE mediated disorder in a subject in need thereof comprising administering to a subject in need thereof an effective amount of a compound of Formula I or any other formulas of the invention described herein, or the enantiomers, diastereomers, or salts thereof or composition thereof.
Administration methods include administering an effective amount (i.e., an effective amount) of a compound or composition of the invention at different times during the course of therapy or concurrently in a combination form. The methods of the invention include all known therapeutic treatment regimens.
As used herein, the term “subject” and “patient” may be used interchangeably, and means a mammal in need of treatment, e.g., companion animals (e.g., dogs, cats, and the like), farm animals (e.g., cows, pigs, horses, sheep, goats and the like) and laboratory animals (e.g., rats, mice, guinea pigs and the like). Typically, the subject is a human in need of treatment.
As used herein, the term “treating” or ‘treatment” refers to obtaining desired pharmacological and/or physiological effect. The effect can be prophylactic or therapeutic, which includes achieving, partially or substantially, one or more of the following results: partially or totally reducing the extent of the disease, disorder or syndrome; ameliorating or improving a clinical symptom or indicator associated with the disorder; delaying, inhibiting or decreasing the likelihood of the progression of the disease, disorder or syndrome; or partially or totally delaying, inhibiting or reducing the likelihood of the onset or development of disease, disorder or syndrome.
“Prodrug” means a pharmaceutically acceptable form of an effective derivative of a compound (or a salt thereof) of the invention, wherein the prodrug may be: 1) a relatively active precursor which converts in vivo to a compound of the invention; 2) a relatively inactive precursor which converts in vivo to a compound of the invention; or 3) a relatively less active component of the compound that contributes to therapeutic activity after becoming available in vivo (i.e., as a metabolite). See “Design of Prodrugs”, ed. H. Bundgaard, Elsevier, 1985.
“Metabolite” means a pharmaceutically acceptable form of a metabolic derivative of a compound (or a salt thereof) of the invention, wherein the derivative is an active compound that contributes to therapeutic activity after becoming available in vivo.
“Effective amount” means that amount of active compound agent that elicits the desired biological response in a subject. Such response includes alleviation of the symptoms of the disease or disorder being treated. The effective amount of a compound of the invention in such a therapeutic method is from about 0.01 mg/kg/day to about 1000 mg/kg/day, from about 0.1 mg/kg/day to about 100 mg/kg/day, from about 0.5 mg/kg/day to about 50 mg/kg/day, or from about 1 mg/kg/day to 10 mg/kg/day.
“Pharmaceutically acceptable carrier” means compounds and compositions that are of sufficient purity and quality for use in the formulation of a composition of the invention and that, when appropriately administered to an animal or human, do not produce an adverse reaction.
“BACE mediated disorder or disease” includes disorders or diseases associated with the elevated expression or overexpression of BACE and conditions that accompany such diseases.
An embodiment of the invention includes administering β-secretase inhibiting compound of Formula I or any formula of the invention described herein or a composition thereof in a combination therapy with one or more additional agents for the treatment of Alzheimer's disease. Additional agents include, but are not limited to: cholinesterase inhibitors, such as donepezil, rivastigmine, and galantamine; memantine; tacrine; antidepressants, such as citalopram, fluoxetine, paroxetine, sertraline and trazodone; anxiolytics, such as lorazepam and oxazepam; antiphychotics, such as aripiprazole, clozapine, haloperidol, olanzapine, quetiapine, risperidone and ziprasidone.
Combination therapy includes co-administration of the compound of the invention and said other agent, sequential administration of the compound and the other agent, administration of a composition containing the compound and the other agent, or simultaneous administration of separate compositions containing of the compound and the other agent.
The invention further includes the process for making the composition comprising mixing one or more of the present compounds and an optional pharmaceutically acceptable carrier; and includes those compositions resulting from such a process, which process includes conventional pharmaceutical techniques.
The compositions of the invention include ocular, oral, nasal, transdermal, topical with or without occlusion, intravenous (both bolus and infusion), and injection (intraperitoneally, subcutaneously, intramuscularly, intratumorally, or parenterally). The composition may be in a dosage unit such as a tablet, pill, capsule, powder, granule, liposome, ion exchange resin, sterile ocular solution, or ocular delivery device (such as a contact lens and the like facilitating immediate release, timed release, or sustained release), parenteral solution or suspension, metered aerosol or liquid spray, drop, ampoule, auto-injector device, or suppository; for administration ocularly, orally, intranasally, sublingually, parenterally, or rectally, or by inhalation or insufflation.
Compositions of the invention suitable for oral administration include solid forms such as pills, tablets, caplets, capsules (each including immediate release, timed release, and sustained release formulations), granules and powders; and, liquid forms such as solutions, syrups, elixirs, emulsions, and suspensions. Forms useful for ocular administration include sterile solutions or ocular delivery devices. Forms useful for parenteral administration include sterile solutions, emulsions, and suspensions.
The compositions of the invention may be administered in a form suitable for once-weekly or once-monthly administration. For example, an insoluble salt of the active compound may be adapted to provide a depot preparation for intramuscular injection (e.g., a decanoate salt) or to provide a solution for ophthalmic administration.
The dosage form containing the composition of the invention contains an effective amount of the active ingredient necessary to provide a therapeutic effect. The composition may contain from about 5,000 mg to about 0.5 mg (preferably, from about 1,000 mg to about 0.5 mg) of a compound of the invention or salt form thereof and may be constituted into any form suitable for the selected mode of administration. The composition may be administered about 1 to about 5 times per day. Daily administration or post-periodic dosing may be employed.
For oral administration, the composition is preferably in the form of a tablet or capsule containing, e.g., 500 to 0.5 milligrams of the active compound. Dosages will vary depending on factors associated with the particular patient being treated (e.g., age, weight, diet, and time of administration), the severity of the condition being treated, the compound being employed, the mode of administration, and the strength of the preparation.
The oral composition is preferably formulated as a homogeneous composition, wherein the active ingredient is dispersed evenly throughout the mixture, which may be readily subdivided into dosage units containing equal amounts of a compound of the invention. Preferably, the compositions are prepared by mixing a compound of the invention (or pharmaceutically acceptable salt thereof) with one or more optionally present pharmaceutical carriers (such as a starch, sugar, diluent, granulating agent, lubricant, glidant, binding agent, and disintegrating agent), one or more optionally present inert pharmaceutical excipients (such as water, glycols, oils, alcohols, flavoring agents, preservatives, coloring agents, and syrup), one or more optionally present conventional tableting ingredients (such as corn starch, lactose, sucrose, sorbitol, talc, stearic acid, magnesium stearate, dicalcium phosphate, and any of a variety of gums), and an optional diluent (such as water).
Binder agents include starch, gelatin, natural sugars (e.g., glucose and beta-lactose), corn sweeteners and natural and synthetic gums (e.g., acacia and tragacanth). Disintegrating agents include starch, methyl cellulose, agar, and bentonite.
Tablets and capsules represent an advantageous oral dosage unit form. Tablets may be sugarcoated or filmcoated using standard techniques. Tablets may also be coated or otherwise compounded to provide a prolonged, control-release therapeutic effect. The dosage form may comprise an inner dosage and an outer dosage component, wherein the outer component is in the form of an envelope over the inner component. The two components may further be separated by a layer which resists disintegration in the stomach (such as an enteric layer) and permits the inner component to pass intact into the duodenum or a layer which delays or sustains release. A variety of enteric and non-enteric layer or coating materials (such as polymeric acids, shellacs, acetyl alcohol, and cellulose acetate or combinations thereof) may be used.
Compounds of the invention may also be administered via a slow release composition; wherein the composition includes a compound of the invention and a biodegradable slow release carrier (e.g., a polymeric carrier) or a pharmaceutically acceptable non-biodegradable slow release carrier (e.g., an ion exchange carrier).
Biodegradable and non-biodegradable slow release carriers are well known in the art. Biodegradable carriers are used to form particles or matrices which retain an active agent(s) and which slowly degrade/dissolve in a suitable environment (e.g., aqueous, acidic, basic and the like) to release the agent. Such particles degrade/dissolve in body fluids to release the active compound(s) therein. The particles are preferably nanoparticles (e.g., in the range of about 1 to 500 nm in diameter, preferably about 50-200 nm in diameter, and most preferably about 100 nm in diameter). In a process for preparing a slow release composition, a slow release carrier and a compound of the invention are first dissolved or dispersed in an organic solvent. The resulting mixture is added into an aqueous solution containing an optional surface-active agent(s) to produce an emulsion. The organic solvent is then evaporated from the emulsion to provide a colloidal suspension of particles containing the slow release carrier and the compound of the invention.
The compound of Formula I may be incorporated for administration orally or by injection in a liquid form such as aqueous solutions, suitably flavored syrups, aqueous or oil suspensions, flavored emulsions with edible oils such as cottonseed oil, sesame oil, coconut oil or peanut oil and the like, or in elixirs or similar pharmaceutical vehicles. Suitable dispersing or suspending agents for aqueous suspensions, include synthetic and natural gums such as tragacanth, acacia, alginate, dextran, sodium carboxymethylcellulose, methylcellulose, polyvinyl-pyrrolidone, and gelatin. The liquid forms in suitably flavored suspending or dispersing agents may also include synthetic and natural gums. For parenteral administration, sterile suspensions and solutions are desired. Isotonic preparations, which generally contain suitable preservatives, are employed when intravenous administration is desired.
The compounds may be administered parenterally via injection. A parenteral formulation may consist of the active ingredient dissolved in or mixed with an appropriate inert liquid carrier. Acceptable liquid carriers usually comprise aqueous solvents and other optional ingredients for aiding solubility or preservation. Such aqueous solvents include sterile water, Ringer's solution, or an isotonic aqueous saline solution. Other optional ingredients include vegetable oils (such as peanut oil, cottonseed oil, and sesame oil), and organic solvents (such as solketal, glycerol, and formyl). A sterile, non-volatile oil may be employed as a solvent or suspending agent. The parenteral formulation is prepared by dissolving or suspending the active ingredient in the liquid carrier whereby the final dosage unit contains from 0.005 to 10% by weight of the active ingredient. Other additives include preservatives, isotonizers, solubilizers, stabilizers, and pain-soothing agents. Injectable suspensions may also be prepared, in which case appropriate liquid carriers, suspending agents and the like may be employed.
Compounds of the invention may be administered intranasally using a suitable intranasal vehicle.
Compounds of the invention may also be administered topically using a suitable topical transdermal vehicle or a transdermal patch.
For ocular administration, the composition is preferably in the form of an ophthalmic composition. The ophthalmic compositions are preferably formulated as eye-drop formulations and filled in appropriate containers to facilitate administration to the eye, for example a dropper fitted with a suitable pipette. Preferably, the compositions are sterile and aqueous based, using purified water. In addition to the compound of the invention, an ophthalmic composition may contain one or more of: a) a surfactant such as a polyoxyethylene fatty acid ester; b) a thickening agents such as cellulose, cellulose derivatives, carboxyvinyl polymers, polyvinyl polymers, and polyvinylpyrrolidones, typically at a concentration n the range of about 0.05 to about 5.0% (wt/vol); c) (as an alternative to or in addition to storing the composition in a container containing nitrogen and optionally including a free oxygen absorber such as Fe), an anti-oxidant such as butylated hydroxyanisol, ascorbic acid, sodium thiosulfate, or butylated hydroxytoluene at a concentration of about 0.00005 to about 0.1% (wt/vol); d) ethanol at a concentration of about 0.01 to 0.5% (wt/vol); and e) other excipients such as an isotonic agent, buffer, preservative, and/or pH-controlling agent. The pH of the ophthalmic composition is desirably within the range of 4 to 8.
In cases where the synthetic intermediates and final products of Formula I described below contain potentially reactive functional groups, for example amino, hydroxy, thiol and carboxylic acid groups, that may interfere with the desired reaction, it may be advantageous to employ protected forms of the intermediate. Methods for the selection, introduction and subsequent removal of protecting groups are well known to those skilled in the art. (T. W. Greene and P. G. M. Wuts “Protective Groups in Organic Synthesis” John Wiley & Sons, Inc., New York 1999). Such protecting group manipulations are assumed in the discussion below and not usually described explicitly. Generally, reagents in the reaction schemes are used in equimolar amounts; however, in certain cases it may be desirable to use an excess of one reagent to drive a reaction to completion. This is especially the case when the excess reagent can be readily removed by evaporation or extraction. Bases employed to neutralize HCl in reaction mixtures are generally used in slight to substantial excess (1.05-5 equivalents).
Compounds of the invention can be prepared employing conventional methods that utilize readily available reagents and starting materials. The reagents used in the preparation of the compounds of this invention can be either commercially obtained or can be prepared by standard procedures described in the literature. Representative compounds of the present invention can be prepared using the following synthetic schemes.
when R8 and/or R9 is not aryl
when R8 and/or R9 is aryl
While this invention has been particularly shown and described with references to example embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
140 g of water, 186 g of CH2Cl2, H3PO4 (34 g) was added to the acrylaldehyde (62 g, 1.1 mol) and the mixture was stirred at 80° C. overnight. The organic layer was separated and the upper aqueous layer was extracted with 100 mL of CH2Cl2. Distillation of the organic phase gave 5,6-dihydro-2H-pyran-3-carbaldehyde (25 g, 40%). 1H-NMR (CDCl3): 2.41 (d, 2H), 2.69 (t, 1H), 3.74 (t, 4H), 3.90 (t, 1H), 4.31 (s, 2H), 6.81 (m, 1H), 9.46 (s, 1H).
5,6-Dihydro-2H-pyran-3-carbaldehyde (20 g, 178.6 mmol) was dissolved in MeOH (150 mL). Pd/C (1 g, 5%) was added and the mixture was reacted at room temperature under H2 at 50 Psi. The mixture was concentrated in vacuo to give tetrahydro-2H-pyran-3-carbaldehyde (20 g, 100%). 1H-NMR (CDCl3): 2.40 (t, 2H), 3.74 (t, 2H), 4.27 (m, 2H), 6.89 (m, 1H), 9.36 (t, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (19.45 g, 90.9 mmol), tetrahydro-2H-pyran-3-carbaldehyde (10 g, 90.9 mmol) and borax (34.6 g, 90.9 mmol) in ethanol (120 mL) and H2O (200 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one (4 g, 15%). 1H-NMR (CDCl3): 1.30 (m, 2H), 1.48 (m, 5H), 1.64 (m, 4H), 1.94 (d, 2H), 6.86 (d, 1H), 7.51 (dd, 1H), 7.92 (d, 1H).
A glass pressure tube was charged with a mixture 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one (4 g, 13.03 mmol), KCN (1.7 g, 26.06 mmol), and (NH4)2CO3 (9.4 g, 97.7 mmol). Formamide (30 mL) was added to fill the tube nearly completely. The mixture was heated at 80° C. for 2 days. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then redissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (1.5 g, 30%). 1H-NMR (MeOD): 1.20 (s, 1H), 1.42 (s, 1H), 1.65 (m, 2H), 1.89 (m, 2H), 2.01 (m, 1H), 2.19 (m, 1H), 3.40 (m, 2H), 3.85 (m, 2H), 4.10 (m, 1H), 6.79 (d, 1H), 7.23 (s, 1H), 7.33 (t, 1H).
A suspension of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (300 mg, 0.79 mmol) and Lawesson's Reagent (319 mg, 0.79 mmol) in dry 1,4-dioxane (4 mL) was heated at 120° C. for 30 minutes in microwave. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(tetrahydro-2H-pyran-3-yl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (120 mg, 40%).
To a solution of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)-2′-thioxospiro[chroman-4,4′-imidazo-lidin]-5′-one (120 mg, 0.3 mmol) in MeOH (16 mL) was added a solution of NaOH (0.6 N, 1.2 mL) and MeI (0.3 mL). The reaction mixture was heated at 60° C. for 10 minutes in microwave. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-1′-methyl-2′-(methylthio)-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 100%).
A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-(tetrahydro-2H-pyran-3-yl)spiro[c-hroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.047 mmol), NH4I (54.5 mg, 0.37 mmol) in a solution of NH3/EtOH (2 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give 2′-amino-6-bromo-1′-methyl-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 100%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (29 mg, 0.197 mmol). The mixture was heated under microwave at 120° C. for 30 minutes. Then the reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-(tetrahydro-2H-pyran-3-yl)-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (2.51 mg, 10%). 1H-NMR (MeOD): 1.69 (t, 2H), 1.91 (m, 2H), 2.18 (t, 1H), 2.41 (d, 1H), 3.08 (t, 2H), 3.24 (s, 3H), 3.49 (m, 2H), 3.88 (dd, 2H), 4.40 (m, 1H), 7.05 (d, 1H), 7.50 (m, 1H), 7.61 (m, 3H), 7.86 (t, 1H), 7.94 (d, 1H).
Pd(PPh3)4 (28 mg, 0.073 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (28 mg, 0.073 mmol) in toluene (4.4 mL), Na2CO3 (2 N, 2.2 mL) and 4-cyanophenylboronic acid (12.9 mg, 0.088 mmol). The mixture was refluxed under Ar for 3-5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (2.58 mg, 9%). 1H-NMR (CDCl3): 0.92 (m, 1H), 1.07 (m, 1H), 1.75 (s, 3H), 4.32 (d, 1H), 5.62 (d, 1H), 5.82-5.98 (m, 5H), 6.06 (m, 2H), 6.15 (m, 2H), 6.47 (d, 1H), 6.46 (s, 1H).
Pd(PPh3)4 (60 mg, 0.052 mmol) in a 100 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (100 mg, 0.26 mmol) in toluene (15.6 mL), Na2CO3 (2 N, 7.8 mL), and 4-cyanophenylboronic acid (76.5 mg, 0.52 mmol). The mixture was refluxed under Ar for 3-5 h. The reaction mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (31 mg, 29%) as a racemic product. 1H-NMR (CDCl3): 2.18 (m, 1H), 2.29 (t, 1H), 3.13 (s, 3H), 5.90 (d, 1H), 7.05 (d, 1H), 7.25 (m, 1H), 7.34 (m, 1H), 7.38 (m, 2H), 7.45 (m, 2H), 7.50-7.64 (m, 3H), 7.82-7.87 (m, 2H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (50 g, 0.23 mol), cyclohexanecarbaldehyde (26 g, 0.23 mol) and borax (89 g, 0.23 mol) in ethanol (300 mL) and H2O (500 mL) was refluxed overnight. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give the crude product, which was purified by column chromatography to give 6-bromo-2-cyclohexylchroman-4-one (60 g, 83%). 1H-NMR (CDCl3): 1.05-1.33 (m, 5H), 1.67-1.81 (m, 5H), 1.95 (d, 1H), 2.64 (m, 2H), 4.15 (m, 1H), 6.86 (d, 1H), 7.51 (m, 1H), 7.94 (s, 1H).
A mixture of 6-bromo-2-cyclohexylchroman-4-one (1.5 g, 5 mmol), KCN (0.63 g, 10 mmol), (NH4)2CO3 (3.6 g, 37.5 mmol) in HCONH2 (30 mL) were added to fill a 40 mL CEM microwave test tube nearly completely. The mixture was heated at 70° C. for 4 hrs. The reaction mixture was then cooled and poured over ice water. Acidification with concentrated HCl was performed to give a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column chromatography to give 6-bromo-2-cyclohexylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (0.75 g, 42%). 1H-NMR (CDCl3): 1.11-1.30 (m, 5H), 1.74 (m, 2H), 1.83 (m, 2H) 1.97 (m, 2H), 2.04 (d, 1H), 2.25 (d, 1H), 4.59 (m, 1H), 5.56 (s, 1H), 6.78 (d, 1H), 7.30 (m, 2H), 7.82 (s, 1H).
A suspension of 6-bromo-2-cyclohexylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (400 mg, 1.06 mmol) and Lawesson's Reagent (427 mg, 1.06 mmol) in dry 1,4-dioxane (6 mL) was heated at 120° C. in a 10 mL CEM microwave test tube for 30 minutes. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-cyclohexyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (280 mg, 67%). 1H-NMR (CDCl3): 0.78-0.92 (m, 2H), 1.13 (m, 1H), 1.17-1.31 (m, 3H), 1.71 (m, 2H), 1.78 (m, 2H), 1.94 (d, 1H), 2.05 (t, 1H), 2.61 (d, 1H), 4.91 (m, 1H), 6.78 (d, 1H), 7.04 (s, 1H), 7.13 (s, 1H), 7.32 (d, 1H), 9.33 (s, 1H).
A mixture of 6-bromo-2-cyclohexyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (57×5 mg, 0.75 mmol), NaOH solution (0.6 N, 0.7×5 mL), CH3I (0.2×5 mL) in methanol (4×5 mL) was heated at 60° C. in a 10 mL CEM test tube for 10 minutes. The reaction mixture was concentrated to give the residue, which was purified by column chromatography to give 6-bromo-2-cyclohexyl-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (170 mg, 56%).
A solution of 6-bromo-2-cyclohexyl-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (170 mg, 0.40 mmol), NH4I (117 mg, 0.80 mmol) in a solution of NH3/EtOH (10 mL, 1.5 N) was heated at 120° C. in a 40 mL test tube under microwave reactor for 3 hrs. After cooling, the mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-cyclohexy-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (90 mg, 57%).
A mixture of 2′-amino-6-bromo-2-cyclohexy-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.08 mmol), 3-cyanophenylboronic acid (23 mg, 0.15 mmol), Pd(PPh3)2Cl2 (20 mg), aqueous cesium carbonate solution (2 M, 0.5 mL) in dry 1,4-dioxane (1 mL) was heated at 120° C. under microwave for 35 minutes. The reaction mixture was concentrated to give the residue, which was purified by preparative TLC and preparative HPLC to give 3-(2′-amino-2-cyclohexy-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (18.2 mg, 56%). 1H-NMR (MeOD): 1.22-1.39 (m, 4H), 1.69-1.86 (m, 4H), 2.01 (s, 1H), 2.13-2.24 (m, 1H), 2.28-2.46 (m, 1H), 3.12 (s, 1H), 3.27-3.36 (m, 3H), 4.63 (m, 1H), 7.06 (m, 1H), 7.49 (s, 1H), 7.57-7.76 (m, 3H), 7.86 (t, 1H), 7.94 (d, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyano-4-fluorophenylboronic acid (17 mg, 0.104 mmol). The mixture was heated under Ar at 120° C. under microwave for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative HPLC twice to give pure 5-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-2-fluorobenzonitrile (7 mg, 32%). 1H-NMR (MeOD): 2.15 (m, 1H), 2.29 (t, 1H), 3.12 & 3.18 (s, 3H), 5.30 & 5.89 (m, 1H), 7.03 (m, 1H), 7.21 (m, 1H), 7.31-7.50 (m, 6H), 7.85 (m, 2H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-nicotinonitrile (24 mg, 0.104 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 5-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)nicotinonitrile (6.27 mg, 30%). 1H-NMR (MeOD): 2.04 (d, 1H), 2.20 (m, 1H), 3.06 (m, 3H), 5.24 (d, 0.3H), 5.82 (d, 0.7H), 7.01 (m, 1H), 7.36 (m, 6H), 7.50 (m, 1H), 8.29 (m, 1H), 8.70 (m, 1H), 8.89 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (20 g, 0.093 mol), thiophene-2-carbaldehyde (10.46 g, 0.093 mol) and borax (35.4 g, 0.093 mol) in ethanol (120 mL) and H2O (200 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-thiophen-2-yl-chroman-4-one (16 g, 50%). 1H-NMR (CDCl3): 3.01 (m, 1H), 3.10 (m, 1H), 5.75 (dd, 1H), 6.94 (d, 1H), 7.02 (t, 1H), 7.05 (d, 1H), 7.32 (d, 1H), 7.54 (dd, 1H), 8.00 (d, 1H).
A glass pressure tube was charged with a mixture of 6-bromo-2-thiophen-2-yl-chroman-4-one (1.5 g, 48.7 mmol), KCN (0.63 g, 97.4 mmol), and (NH4)2CO3 (3.27 g, 34.1 mmol). Formamide (30 mL) and DMF (10 mL) were added to fill the tube nearly completely. The mixture was heated at 70° C. for 2 h with microwave. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (150 mg, 8%).
A suspension of 6-bromo-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (135 mg, 0.357 mmol) and Lawesson's Reagent (144.3 mg, 0.357 mmol) in anhydrous 1,4-dioxane (4 mL) was heated under reflux for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(thiophen-2-yl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (100 mg, 80%). 1H-NMR (CDCl3): 2.41 (m, 1H), 2.55 (dd, 1H), 6.04 (dd, 1H), 6.80 (d, 1H), 6.94 (t, 1H), 7.12 (d, 1H), 7.33 (m, 3H).
To a solution of 6-bromo-2-(thiophen-2-yl)-2′-thioxospiro[chroman-4,4′-imidazo-lidin]-5′-one (100 mg, 0.254 mmol) in MeOH (6 mL) was added a solution of NaOH (20.32 mg, 0.508 mmol) in H2O (1 mL). After stiffing for 10 minutes, MeI (544.4 mg, 3.81 mmol) was added. The reaction mixture was heated under reflux for 2 h. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-1′-methyl-2′-(methylthio)-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 20%). 1H-NMR (CDCl3): 2.22 (d, 1H), 2.41 (t, 1H), 2.74 (s, 3H), 3.02 (s, 3H), 6.12 (d, 1H), 6.80 (d, 1H), 6.94 (m, 2H), 7.31 (m, 1H), 7.33 (m, 2H).
A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.047 mmol), NH4I (13.7 mg, 0.094 mmol) in a solution of NH3/EtOH (2 mL, 2 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuum to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-methyl-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (5 mg, 20%). 1H-NMR (CDCl3): 2.52 (m, 2H), 3.14 (s, 3H), 6.12 (d, 1H), 6.94 (d, 1H), 7.02 (t, 1H), 7.14 (d, 1H), 7.43 (t, 3H).
Pd(PPh3)2Cl2 (20 mg) in a 10 mL of flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-(thiophen-2-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (46 mg, 0.117 mmol) in 1,4-dioxane (5 mL), Cs2CO3 (2 N, 0.5 mL) and 4-cyanophenylboronic acid (34.5 mg, 0.23 mmol). The mixture was refluxed under Ar for 2 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-((2S,4S)-2′-amino-1′-methyl-5′-oxo-2-(thiophen-2-yl)-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (Compound 8a, 1.35 mg, 1%), 1H-NMR (CDCl3): 442-069-3B: 2.30 (d, 1H), 2.49 (d, 1H), 3.01 (d, 3H), 5.81 (dd, 1H), 6.95 (t, 1H), 7.00 (m, 2H), 7.05 (s, 1H), 7.30 (d, 1H), 7.40 (d, 1H), 7.49 (d, 1H), 7.51 (t, 1H), 7.61 (t, 2H), and 3-((2R,4S)-2′-Amino-1′-methyl-5′-oxo-2-(thiophen-2-yl)-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-benzonitrile (Compound 8b, 1.10 mg, 1%). 1H-NMR (CDCl3): 2.40 (d, 1H), 2.63 (t, 1H), 3.31 (s, 3H), 6.12 (d, 1H), 6.95 (t, 1H), 7.00 (d, 1H), 7.05 (m, 2H), 7.30 (d, 1H), 7.48 (m, 2H), 7.54 (d, 1H), 7.68 (t, 2H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (15 g, 70.1 mmol), 2-fluorobenzaldehyde (8.7 g, 70.1 mmol), and borax (26.7 g, 70.1 mmol) in ethanol (90 mL) and H2O (150 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O, and extracted with ether. The ether was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(2-fluorophenyl)chroman-4-one (15 g, 50%). 1HNMR (CDCl3): 2.8 (d, 1H), 3.0 (t, 1H), 5.7 (d, 1H), 6.7 (d, 1H), 6.9 (t, 1H), 7.2 (m, 2H), 7.3 (m, 2H), 7.5 (m, 2H), 7.9 (t, 1H), 8.1 (d, 1H).
A steel bomb was charged with a mixture of 6-bromo-2-(2-fluorophenyl)chroman-4-one (2 g, 6.25 mmol), KCN (0.82 g, 12.5 mmol), and (NH4)2CO3 (4.5 g, 46.87 mmol). Formamide (25 mL) is added to fill the steel bomb nearly completely. The mixture was heated at 70° C. for 48 h then at 110° C. for another 8 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by column to give 6-bromo-2-(2-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (250 mg, 10%). 1H-NMR (CDCl3): 2.3 (t, 1H), 2.5 (d, 1H), 5.6 (s, 1H), 6.2 (d, 1H), 6.9 (t, 1H), 7.1 (t, 1H), 7.2 (t, 1H), 7.4 (m, 3H), 7.6 (t, 1H), 7.9 (s, 1H).
A suspension of 6-bromo-2-(2-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (250 mg, 0.64 mmol) and Lawesson's Reagent (259 mg, 0.64 mmol) in dry 1,4-dioxane (20 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(2-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (180 mg, 67%).
To a solution of 6-bromo-2-(2-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (180 mg, 0.443 mmol) in MeOH (10 mL) was added a solution of NaOH (35.46 mg, 0.887 mmol) in H2O (2 mL). After stiffing for 10 min, MeI (951 mg, 6.65 mmol) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give a residue, which as purified by preparative TLC to give 6-bromo-2-(2-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 41%).
A solution of 6-bromo-2-(2-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 0.183 mmol) and NH4I (53.21 mg, 0.367 mmol) in a solution of NH3/EtOH (2 mL, 1.5 N) was heated at 110° C. in a tube under microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(2-fluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (52 mg, 70%). 1H-NMR (MeOD): 2.15 (d, 1H), 2.25 (d, 1H), 3.20 (s, 3H), 6.15 (d, 1H), 6.78 (d, 1H), 6.99 (t, 1H), 7.05 (s, 1H), 7.15 (t, 1H), 7.25 (d, 2H), 7.50 (t, 1H).
Pd(PPh3)4 (3.84 mg, 0.1 mmol) was added to the solution of 2′-amino-6-bromo-2-(2-fluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 0.1 mmol) and 3-cyanophenylboronic acid (18.3 mg, 0.12 mmol) in dimethyl-benzene (6.6 mL) and an aqueous solution of Na2CO3 (2 M, 0.23 mL). The mixture was heated at 90° C. in an oil bath overnight. The mixture was concentrated to give the crude product which was purified by prepared HPLC to give the desired product 3-(2′-amino-2-(2-fluorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (2.2 mg, 0.5%). 1H-NMR (MeOD): 2.5 (d, 1H), 3.30 (t, 1H), 3.5 (s, 3H), 6.35 (d, 1H), 7.2 (t, 2H), 7.3 (d, 2H), 7.65 (t, 3H), 7.75 (s, 2H), 7.85 (d, 2H).
1-Bromo-3-vinylbenzene (1 g, 5.5 mmol), bis(pinacolaco) (1.5 g, 6 mmol), K2CO3 (2.3 g, 16.5 mol) and Pd(PPh3)2Cl2 (0.3 g 0.33 mol) were dissolved in dioxane (5 ml). The mixture was flushed with argon for 30 minutes, and then refluxed for 12 hour. The mixture was cooled to room temperature, extracted with ethyl acetate, washed with brine, dried over Na2SO4 and concentrated in vacuo to give 4,4,5,5-tetramethyl-2-(3-vinylphenyl)-1,3,2-dioxaborolane (500 mg, 16%).
To a solution of Zn(C2H5)2 (1 M, 6 mL) in DCM (1 mL) was added trifluoro-acetic acid (0.46 ml, 6 mmol) in DCM (1 mL) very slowly under N2 in ice bath. The mixture was stirred for 20 minutes. CH2I2 (1.61 g, 6 mmol) in DCM (1 mL) was added to the mixture. After stirring for 20 minutes, 4,4,5,5-tetramethyl-2-(3-vinylphenyl)-1,3,2-dioxaborolane (690 mg, 3 mmol) in DCM (1 mL) was added. The mixture was stirred at room temperature for 2 hour. the mixture was quenched by NH4Cl solution, extracted with DCM 3 times, washed with brine, filtered and concentrated to give the residue, which was purified preparative TLC and HPLC to give 2-(3-cyclopropylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (70 mg, 10%).
Pd(PPh3)2Cl2 (5 mg, 0.01 mmol) in a 10 mL of flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (110 mg, 0.29 mmol) in 1,4-dioxane (5.0 mL), Cs2CO3 (2 N, 1 mL) and 2-(3-cyclopropylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (70 mg, 0.29 mmol) The mixture was refluxed for 2 hour. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give 2′-amino-6-(3-cyclopropylphenyl)-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (3.6 mg, 3%). 1H-NMR (MeOD): 0.71 (m, 1H), 0.98 (m, 1H), 1.97 (m, 1H), 2.31 (m, 1H), 2.65 (m, 0.8H), 2.75 (m, 0.2H), 3.32 (m, 3H), 5.24 (m, 0.2H), 5.86 (m, 0.8H), 6.99 (m, 1H), 7.12 (m, 2H), 7.23 (m, 2H), 7.28 (m, 2H), 7.46 (m, 6H).
To a mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (250 mg, 0.64 mmol) and K2CO3 (356 mg, 2.6 mmol) in CH3CN (8 mL) was added EtI (402 mg, 2.6 mmol). The reaction mixture refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give 6-bromo-1′-ethyl-2′-(ethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (195 mg, 69%).
A solution of 6-bromo-1′-ethyl-2′-(ethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (195 mg, 0.44 mmol) and NH4I (128 mg, 0.88 mmol) in a solution of NH3/EtOH (5 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-ethyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 24%). 1H-NMR (MeOD): 1.12 (m, 3H), 1.98 (m, 1H), 3.16 (m, 1H), 3.54 (m, 2H), 5.75 (m, 1H), 6.77 (m, 1H), 6.95 (m, 1H), 7.23 (m, 2H), 7.33 (m, 4H).
Pd(PPh3)4 (40 mg, 0.10 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-ethyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 0.10 mmol) in toluene (5 mL), Na2CO3 (2 N, 2 mL), and 4-cyanophenylboronic acid (31 mg, 0.21 mmol). The mixture refluxed under Ar overnight. The reaction mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-1′-ethyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (1.76 mg, 3%). 1H-NMR (MeOD): 1.31 (m, 3H), 2.55 (m, 2H), 3.84 (m, 2H), 5.26 (m, 1H), 5.86 (m, 1H), 7.14 (m, 1H), 7.47 (m, 6H), 7.59 (m, 1H), 7.28 (m, 2H), 7.90 (m, 2H).
Pd(PPh3)2Cl2 (5 mg, 0.01 mmol) in a 10 mL of flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-methoxyphenylboronic acid (16 mg, 0.104 mmol). The mixture was heated under 120° C. under Ar using microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 2′-amino-6-(3-methoxyphenyl)-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (1.69 mg, 8%). 1H-NMR (MeOD): 2.05 (m, 1H), 2.21 (m, 1H), 3.06 (m, 3H), 3.72 (s, 3H), 5.19 (m, 0.3H), 5.81 (m, 0.7H), 6.76 (m, 1H), 6.91 (m, 2H), 6.97 (m, 1H), 7.08 (m, 1H), 7.21 (m, 1H), 7.26 (m, 1H), 7.33 (m, 2H), 7.39 (m, 2H), 7.57 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (22.6 g, 0.11 mol), 2,3-difluoro-benzaldehyde (15 g, 0.11 mol) and borax (40.2 g, 0.11 mol) in ethanol (140 mL) and H2O (234 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(3-fluorophenyl)chroman-4-one (5.3 g, 15%). 1H-NMR (CDCl3): 2.95 (d, 1H), 3.05 (t, 3H), 5.75 (d, 1H), 6.97 (d, 1H), 7.20 (m, 2H), 7.35 (m, 1H), 7.60 (d, 1H), 8.05 (s, 1H).
A mixture of 6-bromo-2-(2,3-difluorophenyl)chroman-4-one (1.49 g, 4.4 mmol), KCN (0.57 g, 8.8 mmol), (NH4)2CO3 (2.96 g, 30.8 mmol) in HCONH2 (30 mL) and DMF (5 mL) was added to fill a 40 mL CEM microwave test tube nearly completely. The mixture was heated at 70° C. for 2 hrs. The reaction mixture was then cooled and poured over ice water. Acidification with concentrated HCl was performed to give a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column chromatography to give 6-bromo-2-(2,3-difluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (235 mg, 13%). 1H-NMR (CDCl3): 2.34 (t, 1H), 2.54 (d, 1H), 5.50 (s, 1H), 6.18 (d, 1H), 6.91 (m, 1H), 7.16 (m, 3H), 7.28 (m, 1H), 7.39 (m, 2H), 7.70 (s, 1H).
A suspension of 6-bromo-2-(2,3-difluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (212 mg, 0.52 mmol) and Lawesson's Reagent (201 mg, 0.52 mmol) in dry m-xylene (4.5 mL) was heated at 150° C. in a 10 mL CEM microwave test tube for 25 minutes. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(2,3-difluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidine]-5′-one (163 mg, 74%). 1H-NMR (CDCl3): 2.33 (t, 3H), 2.54 (d, 1H), 5.36 (s, 1H), 6.17 (d, 1H), 6.91 (d, 1H), 7.17 (m, 3H), 7.30 (m, 2H), 7.46 (s, 1H).
To a solution of 6-bromo-2-(2,3-difluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidine]-5′-one (173 mg, 0.41 mmol) in MeOH (5 mL) was added a solution of NaOH (41 mg, 1.02 mmol) in H2O (1 mL). After stirring for 10 minutes, MeI (0.87 g, 6.12 mmol) was added. The reaction mixture was heated under reflux for 2 h. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-2-(2,3-difluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (63 mg, 16%). 1H-NMR (CDCl3): 2.06 (d, 1H), 2.47 (t, 1H), 2.58 (s, 3H), 3.12 (s, 3H), 6.23 (d, 1H), 6.86 (m, 2H), 7.14 (m, 2H), 7.31 (m, 2H).
A solution of 6-bromo-2-(2,3-difluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (63 mg, 0.14 mmol), NH4I (60.6 mg, 0.42 mmol) in a solution of NH3/EtOH (3 mL, 1.5 N) was heated at 110° C. in a tube under microwave reactor for 3 hrs. After cooling, the mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(2,3-difluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (35 mg, 60%). 1H-NMR (CDCl3): 2.31 (d, 1H), 2.45 (t, 1H), 3.27 (s, 3H), 6.12 (d, 1H), 6.87 (m, 1H), 7.09 (m, 3H), 7.34 (m, 2H), 7.45 (m, 1H).
A mixture of 2′-amino-6-bromo-2-(2,3-difluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (25 mg, 0.05 mmol), 3-cyanophenylboronic acid (19.7 mg, 0.104 mmol), Pd(PPh3)2Cl2 (10 mg, 50%), aqueous cesium carbonate solution (2 M, 0.3 mL) in dry 1,4-dioxane (1 mL) was heated at 120° C. under microwave reactor for 30 minutes. The mixture was concentrated to give the residue, which was purified by preparative TLC to give 3-(2′-amino-2-(2,3-difluorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (7.02 mg, 27%). 1H-NMR (CDCl3): 2.20 (m, 2H), 3.12 (s, 3H), 6.25 (d, 1H), 6.77 (d, 1H), 7.13 (m, 3H), 7.29 (m, 1H), 7.34 (d, 1H), 7.43 (m, 1H), 7.48 (m, 2H), 7.51 (m, 1H), 7.61 (d, 1H), 7.68 (s, 1H), 7.78 (d, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and pyridin-3-ylboronic acid (13 mg, 0.1 mmol). The mixture was heated under microwave at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(pyridin-3-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (18 mg, 80%). 1H-NMR (MeOD): 2.39 (t, 1H), 2.52 (dd, 1H), 3.28 (s, 3H), 5.80 (d, 1H), 7.10 (d, 1H), 7.31 (m, 2H), 7.35 (m, 2H), 7.39 (m, 3H), 7.51 (s, 1H), 7.61 (m, 2H), 8.19 (d, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-amino-5-cyanophenylboronic acid hydrochloride (21 mg, 0.104 mmol). The mixture was heated at 120° C. under microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure β-amino-5-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (3.53 mg, 16%). 1H-NMR (MeOD): 2.44 (m, 1H), 2.60 (m, 1H), 5.24 (d, 0.3H), 5.85 (d, 0.7H), 6.91 (m, 1H), 7.14 (m, 3H), 7.48 (m, 6H), 7.60 (m, 1H).
A mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (180 mg, 0.464 mmol), excess bromomethyl-cyclohexane (327 mg, 1.856 mmol) and solid K2CO3 (256 mg, 1.856 mmol) in CH3CN (10 mL) was stirred for 4 hours at 60° C. The mixture was filtered and the filtrate was concentrated. The crude product was purified by preparative TLC (71 mg, 26%).
A solution of 6-bromo-1′-(cyclohexylmethyl)-2′-(cyclohexylmethylthio)-2-phenylspiro chroman-4,4′-imidazol]-5′(1′H)-one (70 mg, 0.293 mmol), NH4I (85 mg, 0.586 mmol) in a solution of NH3/EtOH (3 mL, 1.5 N) was heated at 120° C. in a tube under microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuum to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-(cyclohexylmethyl)-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 54%).
Pd(PPh3)2Cl2 (10 mg, 0.014 mmol) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.064 mmol) in 1,4-dioxane (1.5 mL), Cs2CO3 (2 N, 0.5 mL) and 3-cyanophenylboronic acid (19 mg, 0.128 mmol). The mixture was heated at 120° C. under microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-1′-(cyclohexylmethyl)-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (9.74 mg, 31%). 1H-NMR (MeOD): 1.02 (m, 5H), 1.62 (m, 6H), 2.03 (m, 1H), 2.24 (m, 1H), 3.30 (m, 1H), 3.44 (m, 1H), 5.91 (m, 1H), 6.97 (m, 1H), 7.16 (m, 1H), 7.25 (m, 1H), 7.35 (m, 3H), 7.46 (m, 2H), 7.56 (m, 1H), 7.71 (m, 2H)
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (30 g, 0.14 mol), 4-fluoro-benzaldehy-de (19.3 g, 0.14 mol) and borax (53.34 g, 0.14 mol) in ethanol (180 mL) and H2O (300 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(4-fluoro-phenyl)-chroman-4-one (10 g, 20%). 1H-NMR (CDCl3): 2.81 (dd, 1H), 2.99 (t, 1H), 5.49 (dd, 1H), 6.87 (d, 1H), 7.04 (t, 2H), 7.38 (t, 2H), 7.51 (dd, 1H), 7.94 (d, 1H).
A glass pressure tube was charged with a mixture of 6-bromo-2-(4-fluoro-phenyl)-chroman-4-one (1.5 g, 4.7 mmol), KCN (0.6 g, 9.4 mmol), and (NH4)2CO3 (3.16 g, 32.9 mmol). Formamide (40 mL) was added to fill the tube nearly completely. The mixture was heated at 70° C. for 2 h with microwave. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then redissolved in ethyl acetate, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-2-(4-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (300 mg, 20%). 1H-NMR (MeOD): 2.19 (m, 1H), 2.23 (m, 1H), 5.76 (dd, 1H), 6.78 (d, 1H), 7.00 (t, 2H), 726 (t, 2H), 7.37 (m, 2H).
A suspension of 6-bromo-2-(4-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (300 mg, 0.77 mmol) and Lawesson's Reagent (310 mg, 0.77 mmol) in dry 1,4-dioxane (4 mL) was heated at 120° C. for 30 min with microwave. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(4-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (160 mg, 50%).
To a solution of 6-bromo-2-(4-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (160 mg, 0.39 mmol) in MeOH (16 mL) was added a solution of NaOH (0.6 N, 1.6 mL) and MeI (0.3 mL). The reaction mixture was heated at 60° C. for 10 min with microwave. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-2-(4-fluorophenyl)-F-methyl-2′-(methylthio)-spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 50%).
A solution of 6-bromo-2-(4-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroma-4,4′-imi-zol]-5′(1′H)-one (80 mg, 0.184 mmol), NH4I (214 mg, 1.47 mmol) in a solution of NH3/EtOH (2 mL, 8 N) was heated at 120° C. in a tube under microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuum to give 2′-amino-6-bromo-(4-fluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 50%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with 2′-amino-6-bromo-2-(4-fluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 0.099 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (29 mg, 0.197 mmol). The mixture was heated under microwave at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 3-((2S,4S)-2′-amino-2-(4-fluorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (19a) (6 mg, 10%), 1H-NMR (MeOD): 2.41 (t, 1H), 2.60 (t, 1H), 3.10 (s, 3H), 5.83 (d, 1H), 7.16 (m, 3H), 7.52 (m, 2H), 7.60 (m, 2H), 7.69 (m, 2H), 7.90 (m, 1H), 7.99 (d, 1H), and 3-(2′-amino-2-(4-fluorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chrom-an-4,4′-imidazole]-6-yl)benzonitrile (19) (4 mg, 8%), 1H-NMR (MeOD): 2.42 (t, 1H), 2.60 (t, 1H), 3.20 (s, 3H), 5.87 (d, 1H), 7.19 (m, 3H), 7.45 (m, 2H), 7.51 (m, 1H), 7.54 (m, 1H), 7.64 (m, 2H), 7.90 (t, 1H), 7.99 (d, 1H).
In a bottle 1-(5-bromo-2-hydroxyphenyl)ethanone (25 g, 0.02 mol), 3-chlorobenzaldehyde (16.35 g, 0.12 mol), EtOH (96%, 144 mL), and NaOH (42.1 g, 1.06 mol) were combined. The mixture was stirred vigorously for 0.5 h. 2-Methoxy-2-methylpropane was added and the mixture was filtered. The filtrate was poured into HCl (1 N, 800 mL) and filtered. The combined solid was dried to give 1-(5-bromo-2-hydroxyphenyl)-3-(3-chlorophenyl)prop-2-en-1-one (23.47 g, 60%). 1H-NMR (CDCl3): 6.88 (d, 1H), 4.35 (m, 2H), 7.49 (m, 3H), 7.61 (s, 1H), 7.80 (m, 1H), 7.93 (m, 1H), 12.56 (s, 1H).
1-(5-Bromo-2-hydroxyphenyl)-3-(3-chlorophenyl)prop-2-en-1-one (23 g, 68 mmol) was dissolved in H2O (513 mL) and EtOH (171 mL). Then NaOH (2.74 g, 68 mmol) was added. The mixture was stirred overnight and filtered. The solid was dissolved in EtOAc and washed with H2O twice. The organic layer was dried and filtered. The filtrate was concentrated to give 6-bromo-2-(3-chlorophenyl)chroman-4-one (18.82 g, 82%). 1H-NMR (CDCl3): 2.87 (m, 1H), 3.02 (m, 1H), 5.44 (m, 1H), 6.96 (d, 1H), 7.31 (m, 1H), 7.37 (m, 2H), 7.48 (s, 1H), 7.58 (m, 1H), 8.02 (d, 1H).
In a steel bomb, a mixture of 6-bromo-2-(3-chlorophenyl)chroman-4-one (7 g, 21 mmol), KCN (2.71 g, 42 mmol), and (NH4)2CO3 (15 g, 156 mmol) in formamide (60 mL) was heated and stirred at 70° C. for 24 h and then heated at 110° C. for 2 days. The mixture was poured into ice/water. Concentrated HCl was added till pH=1. The mixture is filtered to afford a solid, and the filtrate was extracted with CH2Cl2. The organic layer was concentrated to give a residue, which was combined with the solid above. The combined solid was purified through column chromatography to give 6-bromo-2-(3-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (470 mg, 5%). 1H-NMR (CDCl3): 2.20 (m, 1H), 2.28 (m, 1H), 5.76 (m, 1H), 6.82 (m, 1H), 7.27 (m, 5H), 7.39 (m, 1H).
A mixture of 6-bromo-2-(3-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (470 mg, 1.16 mmol) and Lawesson's Reagent (468 mg, 1.16 mmol) in 1,4-dioxane (16 mL) was stirred at 110° C. overnight. The solvent was removed in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(3-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (350 mg, 71%).
To a mixture of 6-bromo-2-(3-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (250 mg, 0.6 mmol) and K2CO3 (327 mg, 2.4 mmol) in CH3CN (6 mL) was added MeI (339 mg, 2.4 mmol). The reaction mixture was heated under reflux for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give 6-bromo-2-(3-chlorophenyl)-1′-methyl-2′-(methylthio)spiro chroman-4,4′-imidazol]-5′(1′H)-one (100 mg, 37%). 1H-NMR (CDCl3): 1.92 (m, 1H), 2.41 (m, 1H), 2.56 (s, 3H), 3.07 (s, 3H), 5.80 (m, 1H), 6.80 (m, 2H), 7.26 (m, 4H), 7.39 (m, 1H).
A solution of 6-bromo-2-(3-chlorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (100 mg, 0.22 mmol) and NH4I (64 mg, 0.44 mmol) in a solution of NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube under microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(3-chlorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 46%).
1H-NMR (MeOD): 2.12 (m, 2H), 3.06 (s, 3H), 5.80 (m, 1H), 6.83 (m, 1H), 7.03 (m, 1H), 7.27 (m, 4H), 7.40 (m, 1H).
Pd(PPh3)4 (27 mg, 0.072 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-2-(3-chlorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.072 mmol) in toluene (5 mL), Na2CO3 (2 N, 2 mL), and 4-cyanophenylboronic acid (12.9 mg, 0.088 mmol). The mixture was refluxed under Ar overnight. The reaction mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-2-(3-chlorophenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (1.03 mg, 3%). 1H-NMR (MeOD): 2.63 (m, 2H), 3.22 (s, 3H), 5.34 (m, 1H), 7.18 (m, 1H), 7.41 (m, 3H), 7.54 (m, 2H), 7.10 (m, 1H), 7.17 (m, 2H), 7.89 (m, 1H), 7.98 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 2-chloro-5-cyanophenylboronic acid (18.9 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar under microwave for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative HPLC twice to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-4-chlorobenzonitrile (4.2 mg, 18%). 1H-NMR (MeOD): 2.38 (m, 1H), 2.52 (m, 1H), 3.15 (s, 3H), 5.18 & 5.76 (m, 1H), 7.03 & 7.18 (m, 1H), 7.26-7.64 (m, 10H).
Pd(PPh3)2Cl2 (15 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (50 mg, 0.13 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.6 mL) and 3-vinylphenylboronic acid (29 mg, 0.19 mmol). The mixture was heated at 120° C. under microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(3-vinylphenyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (3 mg, 6%). 1H-NMR (MeOD): 1.40 (s, 9H), 2.44 (m, 1H), 2.61 (m, 1H), 3.25 (s, 3H), 5.85 (d, 1H), 6.14 (m, 1H), 6.23 (m, 1H), 7.05 (m, 1H), 7.16 (m, 1H), 7.32 (m, 2H), 7.49 (m, 5H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (18 g, 84.1 mmol), 3-methoxy-benzaldehyde (11.4 g, 84.1 mmol) and borax (32 g, 84.1 mmol) in ethanol (112 mL) and H2O (187 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ether. The ether was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(3-methoxyphenyl)chroman-4-one (10 g, 36%). 1H-NMR (CDCl3): 2.71 (d, 1H), 2.99 (t, 1H), 3.75 (s, 3H), 5.38 (d, 1H), 6.90 (m, 4H), 7.27 (t, 1H), 7.51 (d, 1H), 7.95 (s, 1H).
A steel bomb was charged with a mixture of 6-bromo-2-(3-methoxyphenyl) chroman-4-one (3.3 g, 9.94 mmol), KCN (1.29 g, 20 mmol), and (NH4)2CO3 (7.15 g, 75 mmol). Formamide (25 mL) was added to fill the steel bomb nearly completely. The mixture was heated at 70° C. for 48 h then at 110° C. for another 4 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-2-(3-methoxyphenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (1.3 g, 32%). 1H-NMR (CDCl3): 2.21 (t, 1H), 2.40 (d, 1H), 3.41 (s, 3H), 5.74 (d, 1H), 6.81 (d, 2H), 6.90 (t, 2H), 7.25 (m, 3H), 7.89 (s, 1H).
A suspension of 6-bromo-2-(3-methoxyphenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (250 mg, 0.64 mmol) and Lawesson's Reagent (250 mg, 0.62 mmol) in dry 1,4-dioxane (20 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(3-methoxyphenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (100 mg, 45%).
To a solution of 6-bromo-2-(3-methoxyphenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (100 mg, 0.24 mmol) in MeOH (5 mL) was added a solution of NaOH (19.14 mg, 0.48 mmol) in H2O (1 mL). After stiffing for 10 min, MeI (515 mg, 3.6 mmol) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-2-(3-methoxyphenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (65 mg, 60%).
A solution of 6-bromo-2-(3-methoxyphenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (65 mg, 0.146 mmol), NH4I (42.26 mg, 0.3 mmol) in a solution of NH3/EtOH (2 mL, 8 N) was heated at 120° C. in a tube under microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuum to give 2′-amino-6-bromo-2-(3-methoxyphenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (46 mg, 80%).
Pd(PPh3)2Cl2 (20 mg) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-2-(3-methoxyphenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (46 mg, 0.11 mmol) in 1,4-dioxane (5 mL), Cs2CO3 (2 N, 0.5 mL) and 4-cyanophenylboronic acid (32.6 mg, 0.22 mmol). The mixture was refluxed under Ar for 2 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-2-(3-methoxyphenyl)-1′-methyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (10 mg, 20%). 1H-NMR (CDCl3): 2.26 (m, 1H), 2.48 (m, 1H), 3.72 (s, 3H), 5.62 (m, 1H), 6.79 (m, 3H), 6.94 (d, 1H), 7.12 (d, 1H), 7.20 (s, 1H), 7.29 (m, 1H), 7.36 (m, 1H), 7.41 (t, 1H), 7.61 (d, 2H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-fluoro-3-(trifluoromethoxy)phenylboronic acid (20 mg, 0.106 mmol). The mixture was heated at 120° C. under microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(3-(trifluoromethoxy)phenyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (3.32 mg, 14%). 1H-NMR (MeOD): 2.23 (m, 2H), 3.10 (s, 3H), 5.80 (d, 1H), 6.98 (m, 1H), 7.13 (m, 1H), 7.26 (m, 2H), 7.34 (m, 3H), 7.38 (m, 3H), 7.46 (m, 2H).
To a solution of 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (440 mg, 1.18 mmol) in 1,4-dioxane (3.6 mL) in a 10 mL CEM microwave test tube was added Lawesson's reagent (477 mg, 1.18 mmol). The resulting mixture was heated in a CEM microwave reactor at 110° C. for 40 min and then cooled to room temperature. The solvent was removed in vacuo, and the residue was purified by flash chromatography to give 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (238 mg, 52%). MS m/z 389 (M+H+).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (110 mg, 0.28 mmol) in MeOH (5 mL) in a 10 mL CEM microwave test tube was added a 0.6 N NaOH aqueous solution (1.0 mL). After stiffing at room temperature for 10 min, MeI (158 mg, 1.08 mmol) was added, and the reaction was stirred at room temperature for 2 hrs. Upon removing the solvent in vacuo, the residue was purified by flash chromatography to give 1′-benzyl-2′-(benzylthio)-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (63.3 mg, 39%). MS m/z 569 (M+H+).
To a solution of 1′-benzyl-2′-(benzylthio)-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (60 mg, 0.10 mmol) in MeOH/EtOH (1:1, 2 mL) in a 10 mL CEM microwave test tube was added NH4I (50 mg, 0.34 mmol) and NH3/MeOH (7 N, 2 mL). The resulting mixture was heated in a CEM microwave reactor at 120° C. for 60 min. The cooled mixture was concentrated in vacuo and the residue was purified by reversed phase HPLC to give 2′-amino-1′-benzyl-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (17.3 mg, 34%) as a TFA salt. MS m/z 462 (M+H+).
To a solution of 2′-amino-1′-benzyl-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (17.3 mg, 0.04 mmol) in 1,4-dioxane (1.5 mL) was added Cs2CO3 (excess), 3-cyanophenylboronic acid (excess), and catalytical amount of PdCl2dppf. After degassing, the resulting mixture was heated in a CEM microwave reactor at 130° C. for 30 min Solvent was removed in vacuo and the residue was purified by reverse phase HPLC to give 3-((2R,4R)-2′-amino-1′-benzyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (6.0 mg, 33%) as a TFA salt (25b) and 3-((2S,4R)-2′-amino-1′-benzyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (0.86 mg, 4.8%) as a TFA salt. (25a). 1H NMR (400 MHz, CD3OD): 7.84-7.60 (m, 4H), 7.74-7.24 (m, 12H), 7.12 (d, 1H), 5.92 (d, 1H), 4.62 (s, 2H), 2.60 (d, 1H), 2.42 (d, 1H); MS m/z 485 (M+H+) (25b). 1H NMR (400 MHz, CD3OD): 7.74-7.36 (m, 16H), 7.16 (d, 1H), 5.24 (d, 1H), 5.08, 5.00 (two d, 2H), 2.64 (d, 1H), 2.56 (d, 1H); MS m/z 485 (M+H+) (25a).
Pd(PPh3)2Cl2 (5 mg, 0.007 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(hydroxymethyl)phenylboronic acid (17 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give 2′-amino-6-(4-(hydroxymethyl)phenyl)-F-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (1.16 mg, 5%). 1H-NMR (MeOD): 2.42 (m, 1H), 2.57 (m, 1H), 3.31 (m, 3H), 4.15 (s, 2H), 5.83 (m, 1H), 7.09 (m, 1H), 7.28 (m, 1H), 7.38 (m, 4H), 7.47 (m, 3H), 7.56 (m, 1H), 7.61 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and phenylboronic acid (16 mg, 0.1 mmol). The mixture was heated under microwave at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 2′-amino-1′-methyl-2,6-diphenylspiro-[chroman-4,4′-imidazol]-5′(1′H)-one (1.55 mg, 5%). 1H-NMR (MeOD): 2.42 (m, 1H), 2.61 (m, 1H), 3.27 (s, 3H), 5.83 (d, 1H), 7.10 (d, 1H), 7.29 (m, 1H), 7.40 (m, 5H), 7.59 (m, 5H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(methylsulfonyl)phenylboronic acid (20.8 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 2′-amino-1′-methyl-6-(3-(methylsulfonyl)phenyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (16.89 mg, 70%). 1H-NMR (MeOD): 2.01 (m, 1H), 2.31 (m, 1H), 3.14 (m, 3H), 3.21 (m, 3H), 5.22 (m, 0.2H), 5.83 (m, 0.7H), 6.89 (m, 1H), 7.18 (m, 1H), 7.23 (m, 1H), 7.32 (m, 2H), 7.39 (m, 2H), 7.45 (m, 1H), 7.57 (m, 1H), 7.76 (m, 2H), 7.96 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.014 mmol) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(cyanomethyl)phenylboronic acid (16.7 mg, 0.104 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 2-(3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)phenyl)acetonitrile (5.25 mg, 24%). 1H-NMR (MeOD): 2.04 (m, 1H), 2.21 (m, 1H), 3.08 (d, 3H), 3.85 (s, 2H), 5.21 (d, 0.2H), 5.81 (d, 0.8H), 6.94 (d, 1H), 7.11 (m, 1H), 7.24 (m, 2H), 7.35 (m, 3H), 7.39 (m, 5H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(trifluoromethyl) phenylboronic acid (19.7 mg, 0.1 mmol). The mixture was heated under microwave at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(3-(trifluoromethyl)phenyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (4.31 mg, 18%). 1H-NMR (CDCl3): 1.95 (d, 1H), 2.66 (t, 1H), 3.16 (d, 3H), 5.97 (d, 1H), 6.96 (s, 1H), 7.06 (m, 2H), 7.20 (s, 1H), 7.38 (m, 3H), 7.44 (m, 3H), 7.53 (m, 1H), 7.62 (m, 1H), 7.70 (s, 1H).
A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (64.2 g, 0.3 mol), 1-phenyl-ethanone (46.8 g, 0.39 mol) and pyrrolidine (6 g, 0.084 mol) in toluene (125 mL) was stirred vigorously at room temperature overnight. Then the mixture was refluxed for 6 h. After cooling, the mixture was treated with water (100 mL) and extracted with ethyl acetate (200 mL*3). The combined organic layers were concentrated and the residue was purified by column to give 6-bromo-2-methyl-2-phenyl-chroman-4-one (23.7 g, 25%). 1H-NMR (CDCl3): 1.74 (s, 3H), 3.06 (d, 1H), 3.31 (d, 1H), 6.95 (d, 1H), 7.20-7.37 (m, 5H), 7.52 (d, 1H), 7.84 (s, 1H).
A steel pressure tube was charged with a mixture of 6-bromo-2-methyl-2-phenyl-chroman-4-one (6.2 g, 19.6 mmol), KCN (2.55 g, 39.2 mmol), and (NH4)2CO3 (14.1 g, 147 mmol). Formamide (70 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 70° C. for 48 h then at 110° C. for another 24 h. The reaction mixture was then cooled and poured over ice. After acidification with concentrated HCl, the mixture was extracted with ethyl acetate (150 mL*3). The combined organic layers were dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-2-methyl-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (3 g, 40%). 1H-NMR (CDCl3): 1.76 (s, 3H), 2.77 (m, 1H), 2.85 (m, 1H), 4.48 (s, 1H), 7.05 (m, 2H), 7.21-7.54 (m, 6H), 8.55 (s, 1H).
A suspension of 6-bromo-2-methyl-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (1.16 g, 3 mmol) and Lawesson's Reagent (1.21 g, 3 mmol) in dry 1,4-dioxane (24 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by column to give 6-bromo-2-methyl-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (748 mg, 61%). 1H-NMR (CDCl3): 1.75 (s, 3H), 3.78 (m, 2H), 5.79 (s, 1H), 6.94 (m, 1H), 7.14 (m, 1H), 7.22 (m, 1H), 7.26-7.53 (m, 5H), 8.39 (s, 1H).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (748 mg, 1.86 mmol) in MeOH (22 mL) was added a solution of NaOH (149 mg, 3.72 mmol) in H2O (4.5 mL). After stirring for 10 minutes, MeI (2.11 g, 149 mmol) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give (2R,4S)-6-bromo-1′,2-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (29 mg, total yield 36%) and (2S,4S)-6-bromo-1′,2-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (263 mg, total yield 36%).
(2R,4S)-6-Bromo-1′,2-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one: 1H-NMR: 1.75 (s, 3H), 1.99 (m, 1H), 2.47 (d, 1H), 2.53 (s, 3H), 3.07 (s, 3H), 6.70 (d, 1H), 6.84 (d, 1H), 7.18-7.33 (m, 4H), 7.49 (d, 2H).
(2S,4S)-6-Bromo-1′,2-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one: 1H-NMR: 1.61 (s, 3H), 2.10 (s, 3H), 2.82-2.95 (m, 2H), 3.28 (s, 3H), 6.82-6.98 (m, 2H), 7.12-7.46 (m, 5H), 7.72 (m, 1H).
A solution of 6-bromo-1′,2-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (292 mg, 0.667 mmol), NH4I (245.7 mg, 1.668 mmol) in a solution of NH3/EtOH (30 mL, 5 N) was heated at 110° C. in a CEM tube in a microwave reactor for 4 h. After cooling, the mixture was concentrated in vacuum to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′,2-dimethyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (45 mg, 18%). 1H-NMR (MeOD): 1.63 (s, 3H), 1.77 (s, 3H), 2.74 (d, 2H), 6.75 (d, 1H), 7.06 (d, 1H), 7.22 (m, 1H), 7.31 (m, 3H), 7.45 (m, 2H).
Pd(PPh3)2Cl2 (14 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′,2-dimethyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (45 mg, 0.113 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.45 mL) and 4-cyanophenylboronic acid (33 mg, 0.226 mmol). The mixture was refluxed under Ar in a microwave reactor for 2 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative HPLC twice to give pure 3-(2′-amino-1′,2-dimethyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (17 mg, 36%). 1H-NMR (CDCl3): 1.78 (s, 3H), 1.97 (s, 3H), 2.60 (d, 1H), 2.85 (d, 1H), 6.84 & 6.93 (s, 1H), 7.23 (m, 2H), 7.31 (m, 4H), 7.48 (m, 2H), 7.52 (m, 2H), 7.62 (m, 1H), 7.67 (m, 1H), 11.51 (brs, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.05 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(hydroxymethyl)phenylboronic acid (15 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-6-(3-(hydroxymethyl)phenyl)-1′-methyl-2-phenylspi-ro[chroman-4,4′-imidazol]-5′(1′H)-one (1.3 mg, 5%). 1H-NMR (MeOD): 2.05 (t, 1H), 2.21 (t, 1H), 3.07 (s, 3H), 4.50 (s, 1H), 5.81 (d, 1H), 6.94 (d, 1H), 7.11 (s, 1H), 7.19 (d, 1H), 7.30 (m, 4H), 7.41 (m, 4H).
In a bottle, 1-(5-bromo-2-hydroxyphenyl)ethanone (25 g, 0.02 mol), 3-chlorobenzaldehyde (16.35 g, 0.12 mol), EtOH (96%, 144 mL) and NaOH (42.1 g, 1.06 mol) were combined. The mixture was stirred vigorously for 0.5 h. 2-Methoxy-2-methylpropane (300 mL) was added and the mixture was filtered. The filtrate was poured into HCl (1 N, 800 mL) and filtered to give 1-(5-bromo-2-hydroxyphenyl)-3-(3-chlorophenyl)prop-2-en-1-one (23.47 g, 60%). 1H-NMR (CDCl3): 6.88 (d, 1H), 4.35 (m, 2H), 7.49 (m, 3H), 7.61 (s, 1H), 7.80 (m, 1H), 7.93 (m, 1H), 12.56 (s, 1H).
1-(5-Bromo-2-hydroxyphenyl)-3-(3-chlorophenyl)prop-2-en-1-one (23 g, 68 mmol) was dissolved in H2O (513 mL) and EtOH (171 mL). Then NaOH (2.74 g, 68 mmol) was added. The mixture was stirred overnight and filtered to give a solid cake. The cake was dissolved in EtOAc and washed with H2O twice. The organic layer was dried and filtered. The filtrate was concentrated to give 6-bromo-2-(3-chlorophenyl)chroman-4-one (18.82 g, 82%). 1H-NMR (CDCl3): 2.87 (m, 1H), 3.02 (m, 1H), 5.44 (m, 1H), 6.96 (d, 1H), 7.31 (m, 1H), 7.37 (m, 2H), 7.48 (s, 1H), 7.58 (m, 1H), 8.02 (d, 1H).
In a steel bomb, a mixture of 6-bromo-2-(3-chlorophenyl)chroman-4-one (7 g, 21 mmol), KCN (2.71 g, 42 mmol) and (NH4)2CO3 (15 g, 156 mmol) in formamide (60 mL) was heated and stirred at 70° C. for 24 h and then at 110° C. for 2 days. The mixture was poured into ice/water. Concentrated HCl was added till pH=1. The mixture was filtered to yield a solid cake. The filtrate was extracted with CH2Cl2. The organic layer was concentrated to give a residue, which was combined with the cake above. The solid was purified by column chromatography to give 6-bromo-2-(3-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (470 mg, 5%). 1H-NMR (CDCl3): 2.20 (m, 1H), 2.28 (m, 1H), 5.76 (m, 1H), 6.82 (m, 1H), 7.27 (m, 5H), 7.39 (m, 1H).
A mixture of 6-bromo-2-(3-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (470 mg, 1.16 mmol) and Lawesson's Reagent (468 mg, 1.16 mmol) in 1,4-dioxane (16 mL) was stirred at 110° C. overnight. The solvent was removed in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(3-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (350 mg, 71%).
To a mixture of 6-bromo-2-(3-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (250 mg, 0.6 mmol) and K2CO3 (327 mg, 2.4 mmol) in CH3CN (6 mL) was added MeI (339 mg, 2.4 mmol). The reaction mixture was refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue which was purified by preparative TLC to give 6-bromo-2-(3-chlorophenyl)-1′-methyl-2′-(methylthio)spiro chroman-4,4′-imidazol]-5′(1′H)-one (100 mg, 37%).
1H-NMR (CDCl3): 1.92 (m, 1H), 2.41 (m, 1H), 2.56 (s, 3H), 3.07 (s, 3H), 5.80 (m, 1H0, 6.80 (m, 2H), 7.26 (m, 4H), 7.39 (m, 1H).
A solution of 6-bromo-2-(3-chlorophenyl)-1′-methyl-2′-(methylthio)spiro chroman-4,4′-imidazol]-5′(1′H)-one (100 mg, 0.22 mmol), NH4I (64 mg, 0.44 mmol) in a solution of NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(3-chlorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 46%). 1H-NMR (MeOD): 2.12 (m, 2H), 3.06 (s, 3H), 5.80 (m, 1H), 6.83 (m, 1H0, 7.03 (m, 1H), 7.27 (m, 4H), 7.40 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 2-cyanophenylboronic acid (15.3 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative HPLC twice to give pure 2-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (2.83 mg, 13%). 1H-NMR (MeOD): 2.48-2.60 (m, 2H), 3.33 (s, 3H), 5.26 & 5.88 (m, 1H), 7.17 (m, 1H), 7.37-7.60 (m, 9H), 7.70 (m, 1H), 7.81 (m, 1H).
A mixture of 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (21 mg, 0.05 mmol), thiophen-2-ylboronic acid (14 mg, 0.1 mmol), Cs2CO3 solution (2 M, 0.5 mL) and Pd(PPh3)2Cl2 (10 mg) in 1,4-dioxane (1 mL) was stirred in a microwave test tube under Ar at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 2′-amino-1′-methyl-2-phenyl-6-(thiophen-2-yl)spiro[chroman-4,4′-imidazol]-5′-(1′H)-one (0.87 mg, 4%). 1H-NMR (MeOD): 2.45-2.54 (M, 1H), 2.60-2.63 (m, 1H), 3.32 (s, 3H), 5.88 (d, 1H), 7.06-7.14 (m, 2H), 7.33-7.39 (m, 2H), 7.41-7.50 (m, 3H), 7.51-7.64 (m, 4H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(2-methoxyethylcarbamoyl)phenylboronic acid (23.2 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative HPLC twice to give pure 5-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-2-fluorobenzonitrile (9.38 mg, 37%). 1H-NMR (MeOD): 2.38 (m, 1H), 2.55 (m, 1H), 3.24 (s, 3H), 3.39 (s, 3H), 3.50 (s, 4H), 5.15 & 5.76 (m, 1H), 7.04 (m, 1H), 7.32 (m, 3H), 7.40 (m, 4H), 7.55-7.67 (m, 3H), 7.94 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (15 g, 0.07 mol), 3-fluorobenzaldehyde (8.7 g, 0.07 mol) and borax (26.7 g, 0.07 mol) in ethanol (90 mL) and H2O (150 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O, and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(3-fluorophenyl)chroman-4-one (8.3 g, 37%). 1H-NMR (CDCl3): 2.93 (d, 1H), 3.03 (m, 1H), 5.47 (d, 1H), 7.06 (d, 1H), 7.11 (m, 1H), 7.22 (m, 2H), 7.40 (m, 1H), 7.57 (d, 1H), 8.04 (s, 1H).
A steel bomb was charged with a mixture of 6-bromo-2-(3-fluorophenyl)chroman-4-one (3.2 g, 0.01 mol), potassuim cyanide (1.95 g, 0.03 mmol), and (NH4)2CO3 (7.2 g, 0.075 mmol). Formamide (20 mL) was added to fill the steel bomb nearly completely. The mixture was heated at 70° C. for 48 h then at 110° C. for another 8 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl was performed to give a precipitate which is filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-2-(3-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (0.31 g, 8%). 1H-NMR (CDCl3): 2.27 (t, 1H), 2.48 (d, 1H), 5.53 (s, 1H), 5.88 (d, 1H), 6.89 (d, 1H), 7.08 (m, 1H), 7.18 (m, 2H), 7.38 (m, 3H), 7.78 (s, 1H).
A suspension of 6-bromo-2-(3-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (300 mg, 0.77 mmol) and Lawesson's reagent (312 mg, 0.77 mmol) in dry 1,4-dioxane (10 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(3-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidine]-5′-one (35 mg, 17%).
To a solution of 6-bromo-2-(3-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidine]-5′-one (264 mg, 0.65 mmol) in MeOH (10 mL) was added a solution of NaOH (65 mg, 1.63 mmol) in H2O (2 mL). After stirring for 10 minutes, MeI (1.4 g, 9.75 mmol) was added. The reaction mixture was heated under reflux for 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-2-(3-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 28%).
A solution of 6-bromo-2-(3-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 0.18 mmol) and NH4I (52 mg, 0.36 mmol) in NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC and then by preparative HPLC to afford 2′-amino-6-bromo-2-(3-fluorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (36 mg, 50%). 1H-NMR (MeOD): 2.16 (m, 2H), 3.12 (s, 3H), 5.87 (d, 1H), 6.90 (d, 1H), 7.08 (m, 2H), 7.25 (m, 2H), 7.33 (d, 1H), 7.41 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(dimethylcarbamoyl)phenylboronic acid (20 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N,N-dimethylbenzamide (1.44 mg, 6%). 1H-NMR (MeOD): 2.44 (m, 1H), 2.62 (m, 1H), 3.14 (s, 3H), 3.13 (s, 1H), 5.24 (m, 0.3H), 5.88 (m, 0.7H), 7.15 (m, 1H), 7.41 (m, 3H), 7.45 (m, 1H), 7.53 (m, 4H), 7.18 (m, 3H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-fluoro-3-(2-hydroxyethylcarbamoyl)phenylboronic acid (23 mg, 0.106 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 5-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-2-fluoro-N-(2-hydroxyethyl)benzamide (3.1 mg, 12%). 1H-NMR (MeOD): 2.48 (m, 1H), 2.61 (m, 1H), 3.34 (s, 3H), 3.57 (m, 2H), 3.72 (m, 2H), 5.27 (d, 0.3H), 5.89 (d, 0.8H), 7.18 (m, 1H), 7.30 (m, 1H), 7.45 (m, 1H), 7.52 (m, 4H), 7.67 (m, 1H), 7.79 (m, 1H), 8.01 (m, 1H), 8.32 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H′-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-acetamidophenylboronic acid (17.9 mg, 0.1 mmol). The mixture was heated at 120° C. in a microwave reactor for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure N-(3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospir-o[chroman-4,4′-imidazole]-6-yl)phenyl)acetamide (5.8 mg, 20%). 1H-NMR (MeOD): 2.03 (s, 3H), 2.21 (t, 1H), 2.41 (t, 1H), 3.07 (s, 3H), 5.81 (d, 1H), 6.92 (d, 1H), 7.12 (t, 1H), 7.21 (t, 2H), 7.33 (t, 2H), 7.49 (m, 4H), 7.59 (d, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(acetamidomethyl)phenylboronic acid (19.3 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure N-(3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro-[chroman-4,4′-imidazole]-6-yl)benzyl)acetamide (2.5 mg, 11%). 1H-NMR (MeOD): 2.01 (s, 3H), 2.16 (d, 1H), 2.32 (t, 1H), 3.17 (s, 3H), 4.40 (s, 2H), 5.92 (d, 1H), 7.03 (d, 1H), 7.23 (d, 2H), 7.36 (m, 2H), 7.41 (t, 4H), 7.48 (m, 3H).
Anhydrous aluminum chloride (84 g, 0.486 mol) was suspended in methylene chloride (1200 mL), and then acetyl chloride (49.2 g, 0.629 mol) was added while stirring and cooling on ice. The mixture was stirred for 20 minutes while cooling on ice and 4-bromophenol (98 g, 0.57 mol) was added. The reaction mixture was stirred at room temperature for 1 h, and then ice water was added and extraction was performed with ethyl acetate. The organic layer was washed with brine and then dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield 4-bromophenyl acetate (104 g, 85%). 1H-NMR (CDCl3): 2.28 (s, 3H), 6.98 (d, 2H), 7.48 (d, 2H).
A mixture of 4-bromophenyl acetate (104 g, 0.484 mol) and anhydrous aluminum chloride (130.5 g, 0.968 mol) was stirred at 120-140° C. for 20 minutes. The reaction mixture was cooled to 60-80° C. Ice water was added and extraction was performed with ethyl acetate. The organic layer was washed with brine and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield 1-(5-bromo-2-hydroxy-phenyl)-ethanone (101 g, 98%). 1H-NMR (CDCl3): 2.60 (s, 3H), 6.87 (d, 1H), 7.53 (dd, 1H), 7.81 (s, 1H), 12.12 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (29 g, 0.135 mol), benzaldehyde (14.3 g, 0.135 mol) and borax (51.5 g, 0.135 mol) in ethanol (180 mL) and H2O (300 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-phenyl-chroman-4-one (8.5 g, 21%). 1H-NMR (CDCl3): 2.89 (dd, 1H), 3.06 (dd, 1H), 5.46 (dd, 1H), 6.95 (d, 1H), 7.37-7.46 (m, 5H), 7.58 (d, 1H), 8.02 (d, 1H).
A glass pressure tube was charged with a mixture of 6-bromo-2-phenyl-chroman-4-one (7.6 g, 25 mmol), KCN (3.25 g, 50 mmol), and (NH4)2CO3 (18 g, 187.5 mmol). Formamide (80 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 70° C. for 24 h then at 110° C. for another 48 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by column to give 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (466 mg, 5%). 1H-NMR (MeOD): 2.28 (t, 1H), 2.43 (dd, 1H), 5.83 (d, 1H), 6.90 (d, 1H), 7.33-7.45 (m, 7H).
A suspension of 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (186 mg, 0.5 mmol) and Lawesson's Reagent (202 mg, 0.5 mmol) in dry 1,4-dioxane (8 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (115 mg, 62%). 1H-NMR (CDCl3): 2.35 (t, 1H), 2.49 (dd, 1H), 5.83 (d, 1H), 6.90 (d, 1H), 7.36-7.45 (m, 7H).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (115 mg, 0.298 mmol) in MeOH (5 mL) was added a solution of NaOH (24 mg, 0.608 mmol) in H2O (1 mL). After stirring for 10 minutes, MeI (176 mg, 1.236 mmol) was added. The reaction mixture was refluxed for 2 h. And then MeI (500 mg, 3.52 mmol) was added and the reaction mixture was refluxed for another 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (59 mg, 48%).
A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (59 mg, 0.142 mmol), NH4I (41.5 mg, 0.286 mmol) in a solution of NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (21 mg, 38%). 1H-NMR (MeOD): 2.04 (d, 1H), 2.15 (dd, 1H), 4.51 (m, 1H), 5.75 (d, 1H), 6.78 (m, 1H), 6.99 (d, 1H), 7.20-7.26 (m, 2H), 7.26-7.35 (m, 4H).
A mixture of 4-bromophenyl acetate (64.2 g, 0.3 mol), benzaldehyde (31.8 g, 0.3 mol), 96% EtOH (370 mL), and NaOH (108 g) was stirred vigorously for 0.5-1 h, during which time, the reaction solidified. After standing for 3 h, the reaction mixture was triturated with MTBA (400 mL), and the solid was filtered and then dissolved in 600 mL of ethyl acetate. The organic layers was separated, dried over Na2SO4, filtered, and concentrated to give 1-(5-bromo-2-hydroxy-phenyl)-3-phenyl-propenone (55 g, 61%. 1H-NMR (CDCl3): 6.86 (m, 1H), 7.38 (m, 3H), 7.49 (m, 2H), 7.61 (m, 2H), 7.93 (t, 2H), 12.66 (s, 1H).
To a solution of 1-(5-bromo-2-hydroxy-phenyl)-3-phenyl-propenone (55 g, 0.182 mol) in water (1365 mL) and EtOH (455 mL) was added NaOH (7.3 g, 0.182 mol). The resulting orange slurry was stirred for 5 h at room temperature and then filtered. The solid was washed with water and then dissolved in ethyl acetate (400 mL). The water was removed and the product was dried over Na2SO4, filtered, and concentrated to give 6-bromo-2-phenyl-chroman-4-one (49.5 g, 90%). 1H-NMR (CDCl3): 2.82 (dd, 1H), 3.03 (dd, 1H), 5.42 (dd, 1H), 6.90 (d, 1H), 7.31-7.41 (m, 5H), 7.52 (dd, 1H), 7.97 (d, 1H).
A glass pressure tube was charged with a mixture of 6-bromo-2-phenyl-chroman-4-one (15.1 g, 50 mmol), KCN (6.5 g, 100 mmol), and (NH4)2CO3 (36 g, 375 mmol). Formamide (80 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 70° C. for 24 h then at 110° C. for another 48 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by column to give 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (2.4 g, 13%). 1H-NMR (CDCl3): 2.28 (t, 1H), 2.43 (dd, 1H), 5.66 (m, 1H), 5.82 (d, 1H), 6.86 (d, 1H), 7.33-7.41 (m, 7H), 8.03 (m, 1H).
A suspension of 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (1.12 g, 3 mmol) and Lawesson's Reagent (1.21 g, 3 mmol) in dry 1,4-dioxane (25 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (780 mg, 67%). 1H-NMR (CDCl3): 2.26 (dd, 1H), 2.43 (dd, 1H), 5.76 (dd, 1H), 6.84 (m, 2H), 7.32-7.36 (m, 6H), 8.22 (m, 1H).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (580.5 mg, 1.5 mmol) in MeOH (10 mL) was added a solution of NaOH (120 mg, 3 mmol) in H2O (2 mL). After stirring for 10 min, MeI (3.2 g, 225 mmol) was added. The reaction mixture was refluxed for 2 h. Then MeI (3.2 mg, 225 mmol) was added and the reaction was refluxed for another 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (380 mg, 61%).
A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (380 mg, 0.913 mmol), and NH4I (265 mg, 1.83 mmol) in a solution of NH3/EtOH (8 mL, 1.5 N) was heated at 110° C. in a CEM tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one with two isomers: cis isomer (21 mg, 38%) and trans isomer (25 mg, 45%).
(cis): 1H-NMR (MeOD): 2.05 (t, 1H), 2.25 (t, 1H), 3.13 (s, 3H), 5.86 (d, 1H), 6.87 (d, 1H), 7.09 (m, 1H), 7.31-7.35 (m, 2H), 7.36-7.48 (m, 4H).
(trans): 1H-NMR (MeOD): 2.12 (m, 1H), 2.25 (t, 1H), 3.14&3.20 (s, 3H), 5.87 (d, 1H), 6.88 (d, 1H), 7.11 (m, 1H), 7.32-7.36 (m, 2H), 7.38-7.48 (m, 4H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(N,N-dimethylsulfamoyl)phenylboronic acid (24 mg, 0.104 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N,N-dimethylbenzenesulfonamide (1.7 mg, 7%). 1H-NMR (MeOD): 2.47 (m, 1H), 2.62 (m, 1H), 2.71 (s, 6H), 3.29 (s, 3H), 5.28 (d, 0.3H), 5.89 (d, 0.7H), 7.19 (m, 1H), 7.47 (m, 6H), 7.69 (m, 2H), 7.75 (m, 1H), 7.93 (m, 2H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (18 g, 84.1 mmol), 3-methoxy-benzaldehyde (11.4 g, 84.1 mol), and borax (51.5 g, 0.135 mol) in ethanol (112 mL) and H2O (187 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O, and extracted with ether. The ether was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(3-methoxy-phenyl)-chroman-4-one (5 g, 18%). 1H-NMR (CDCl3): 2.89 (d, 1H), 3.04 (t, 1H), 3.81 (s, 3H), 5.43 (d, 2H), 6.96 (m, 3H), 7.32 (m, 1H), 7.58 (m, 1H), 8.01 (s, 1H)
A steel bomb was charged with a mixture of 6-bromo-2-(3-methoxyphenyl)chroman-4-one (2 g, 6 mmol), KCN (770 mg, 12 mmol), and (NH4)2CO3 (4 g, 42 mmol). Formamide (20 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 70° C. for 72 h then at 110° C. for another 5 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which is purified by column to give 6-bromo-2-(3-methoxyphenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (534 mg, 22%). 1H-NMR (MeOD): 2.26 (d, 1H), 2.37 (t, 1H), 3.79 (s, 3H), 5.80 (d, 1H), 6.88 (m, 2H), 7.00 (m, 2H), 7.44 (m, 2H).
A suspension of 6-bromo-2-(3-methoxyphenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (273 mg, 0.679 mmol) and Lawesson's Reagent (274 mg, 0.629 mmol) in dry 1,4-dioxane (10 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(3-methoxyphenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (200 mg, 71%).
1H-NMR (CDCl3): 2.24 (m, 1H), 2.41 (m, 1H), 3.76 (s, 3H), 5.72 (m, 1H), 6.88 (m, 4H), 7.31 (m, 1H), 8.24 (m, 1H).
To a solution of 6-bromo-2-(3-methoxyphenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (50 mg, 0.12 mmol) in MeOH (5 mL) was added a solution of NaOH (9.5 mg) in H2O (1 mL). After stirring for 10 minutes, MeI (171 mg) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-2-(3-methoxyphenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (13 mg, 21%).
A solution of 6-bromo-2-(3-methoxyphenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (13 mg) and NH4I (10 mg) in a solution of NH3/EtOH (2 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(3-methoxyphenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (2.17 mg, 22%).
1H-NMR (MeOD): 2.00 (d, 1H), 2.13 (m, 1H), 3.03 (s, 3H), 3.70 (s, 3H), 5.70 (m, 1H), 6.77 (m, 2H), 6.89 (m, 2H), 7.00 (m, 1H), 7.21 (m, 2H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.05 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(2-cyanoethyl-carbamoyl)phenylboronic acid (22 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 mins. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-(2-cyanoethyl)benzamide (1.96 mg, 8%). 1H-NMR (MeOD): 2.52 (m, 1H), 2.64 (m, 1H), 2.83 (t, 2H), 3.35 (s, 3H), 3.68 (t, 2H), 5.86 (d, 1H), 7.18 (d, 1H), 7.43 (m, 3H), 7.55 (m, 3H), 7.57 (d, 1H), 7.71 (d, 1H), 7.79 (m, 2H), 8.05 (s, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(N-methylsulfamoyl)phenylboronic acid (23 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-methylbenzenesulfonamide (5.88 mg, 24%). 1H-NMR (MeOD): 2.16 (m, 1H), 2.22 (m, 1H), 2.41 (m, 3H), 3.15 (m, 3H), 5.21 (m, 0.2H), 5.83 (m, 0.8H), 6.98 (m, 1H), 7.16 (m, 1H), 7.25 (m, 1H), 7.32 (m, 2H), 7.38 (m, 2H), 7.42 (m, 1H), 7.51 (m, 1H), 7.66 (m, 2H), 7.86 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(methylsulfonyl)phenylboronic acid (20.8 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-1′-methyl-6-(4-(methylsulfonyl)phenyl)-2-phenylspir-o[chroman-4,4′-imidazol]-5′(1′H)-one (18 mg, 80%). 1H-NMR (CDCl3+MeOD): 2.07 (dd, 1H), 2.41 (t, 1H), 3.01 (s, 3H), 3.12 (s, 3H), 5.25 (d, 0.5H), 5.89 (d, 1H), 6.90 (d, 1H), 7.31 (s, 2H), 7.32 (t, 2H), 7.39 (d, 3H), 7.60 (t, 2H), 7.87 (d, 2H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(methylcarbamoyl)phenylboronic acid (18.6 mg, 0.104 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-methylbenzamide (0.96 mg, 4%). 1H-NMR (CDCl3): 2.36 (d, 1H), 2.57 (t, 1H), 2.73 (s, 3H), 2.97 (s, 3H), 5.87 (d, 1H), 7.11 (m, 2H), 7.45 (m, 8H), 7.51 (m, 1H), 7.60 (s, 1H), 7.78 (s, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(methylsulfonamido) phenylboronic acid (22 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give N-(3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)phenyl)methanesulfonamide (0.91 mg, 4%). 1H-NMR (MeOD): 2.46 (m, 1H), 2.62 (m, 1H), 2.97 (s, 3H), 3.29 (s, 3H), 5.86 (m, 1H), 6.94 (m, 2H), 7.13 (m, 1H), 7.18 (m, 1H), 7.41 (m, 6H), 7.62 (m, 1H), 7.81 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (6 g, 28 mmol), 4-chloro-benzaldehyde (3.92 g, 28 mmol), and borax (10H2O, 10.67 g, 28 mmol) in H2O (60 mL) and EtOH (36 mL) was stirred at 110° C. overnight. The mixture was filtered to give a solid cake. The cake was dissolved in EtOAc and filtered. The filtrate was dried, filtered, and concentrated to give 6-bromo-2-(4-chloro-phenyl)-chroman-4-one (8.43 g, 89%). 1H-NMR (CDCl3): 2.88 (m, 1H), 3.04 (m, 1H), 5.44 (m, 1H), 6.94 (m, 1H), 7.39 (m, 4H), 7.57 (m, 1H), 8.02 (m, 1H).
In a steel bomb, a mixture of 6-bromo-2-(4-chlorophenyl)chroman-4-one (4 g, 12 mmol), KCN (1.54 g, 24 mmol), and (NH4)2CO3 (8.6 g, 90 mmol) in formamide (40 mL) was heated and stirred at 70° C. for 24 h and then at 110° C. for 2 days. The mixture was poured into ice/water. Concentrated HCl was added until pH=1. The mixture was filtered to give a solid cake and the filtrate was extracted with CH2Cl2. The organic layer was concentrated to give a residue, which was combined with the cake above. The solid was purified by column chromatography to give 6-bromo-2-(4-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (600 mg, 12%).
A mixture of 6-bromo-2-(4-chlorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (600 mg, 1.48 mmol) and Lawesson's Reagent (596 mg, 1.48 mmol) in 1,4-dioxane (25 mL) was stirred at 110° C. overnight. The solvent was removed in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(4-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (450 mg, 69%). 1H-NMR (MeOD): 2.24 (m, 1H), 2.45 (m, 1H), 6.82 (m, 1H), 6.91 (m, 1H), 7.20 (m, 1H), 7.44 (m, 5H).
To a mixture of 6-bromo-2-(4-chlorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (450 mg, 1.07 mmol) and K2CO3 (588 mg, 4.27 mmol) in CH3CN (10 mL) was added MeI (610 mg, 4.27 mmol). The reaction mixture was refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give 6-bromo-2-(4-chlorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (325 mg, 37%). 1H-NMR (CDCl3): 1.89 (m, 1H), 2.41 (m, 1H), 2.56 (t, 3H), 3.17 (m, 3H), 5.81 (m, 1H), 6.79 (m, 2H), 7.23 (m, 1H), 7.43 (m, 4H).
A solution of 6-bromo-2-(4-chlorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (300 mg, 0.67 mmol) and NH4I (194 mg, 1.33 mmol) in NH3/EtOH (5 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(4-chlorophenyl)-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (35 mg, 12%). 1H-NMR (MeOD): 2.19 (m, 1H), 2.41 (m, 1H), 3.11 (m, 3H), 5.15 (m, 0.5H), 5.38 (m, 0.5H), 6.78 (m, 1H), 6.82 (m, 0.5H), 7.02 (m, 0.5H), 7.23 (m, 1H), 7.31 (m, 3H), 7.44 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(methoxymethyl)phenylboronic acid (16.6 mg, 0.1 mmol). The mixture was heated at 120° C. in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-6-(4-(methoxymethyl)phenyl)-1′-methyl-2-phenylsp-iro[chroman-4,4′-imidazol]-5′(1′H)-one (3.8 mg, 15%). 1H-NMR (MeOD): 2.10 (t, 1H), 2.24 (t, 1H), 3.01 (s, 3H), 3.27 (s, 3H), 4.17 (m, 2H), 5.81 (d, 1H), 6.90 (m, 2H), 7.12 (d, 2H), 7.27 (m, 3H), 7.49 (m, 5H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.05 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(butylcarbamoyl)phenylboronic acid (23 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 mins. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 3-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro-[chroman-4,4′-imidazole]-6-yl)-N-butylbenzamide (12.4 mg, 50%). cis (2.50 mg, 10%). 1H-NMR (MeOD): 0.95 (m, 3H), 1.42 (m, 2H), 1.60 (m, 2H), 2.14 (d, 1H), 2.31 (t, 1H), 3.33 (s, 3H), 3.36 (d, 2H), 5.88 (d, 1H), 7.04 (d, 1H), 7.24 (s, 1H), 7.37 (m, 1H), 7.41 (t, 2H), 7.48 (d, 3H), 7.53 (d, 1H), 7.66 (d, 1H), 7.69 (d, 1H), 7.94 (s, 1H). trans (9.91 mg, 40%). 1H-NMR (MeOD): 0.96 (t, 3H), 1.43 (m, 2H), 1.61 (m, 2H), 2.03 (d, 1H), 2.52 (t, 1H), 3.33 (s, 3H), 3.39 (d, 2H), 5.30 (d, 1H), 7.05 (d, 1H), 7.25 (s, 1H), 7.39 (m, 1H), 7.42 (t, 2H), 7.47 (d, 3H), 7.53 (d, 1H), 7.67 (d, 1H), 7.70 (d, 1H), 7.93 (s, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(trifluoromethyl)phenylboronic acid (20 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative HPLC twice to give pure 2′-amino-1′-methyl-2-phenyl-6-(4-(trifluoro methyl)phenyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (2.87 mg, 12%). 1H-NMR (MeOD): 2.46 (m, 1H), 2.60 (m, 1H), 3.32 (s, 3H), 5.25 & 5.85 (m, 1H), 7.14 (m, 1H), 7.37-7.54 (m, 6H), 7.66-7.78 (m, 5H).
To a mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (300 mg, 0.77 mmol) and K2CO3 (427 mg, 3.1 mmol) in CH3CN (6 mL) was added PrBr (380 mg, 3.1 mmol). The reaction mixture was refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give 6-bromo-2-phenyl-1′-propyl-2′-(propylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (285 mg, 90%). 1H-NMR (CDCl3): 0.87 (m, 3H), 1.00 (m, 3H), 1.64 (m, 2H), 1.73 (m, 2H), 1.89 (m, 1H), 2.48 (m, 1H), 3.16 (m, 2H), 3.44 (m, 2H), 5.82 (m, 1H), 6.81 (m, 2H), 7.22 (m, 1H), 7.30 (m, 3H), 7.48 (m, 2H).
A solution of 6-bromo-2-phenyl-1′-propyl-2′-(propylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (280 mg, 0.6 mmol) and NH4I (172 mg, 1.2 mmol) in NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-phenyl-1′-propylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (45 mg, 18%). 1H-NMR (MeOD): 0.93 (m, 3H), 1.66 (m, 2H), 2.04 (m, 1H), 2.25 (m, 1H), 3.56 (m, 2H), 5.83 (m, 1H), 6.87 (m, 1H), 7.06 (m, 1H), 7.31 (m, 2H), 7.40 (m, 4H).
To a mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (131 mg, 0.34 mmol) and K2CO3 (186 mg, 1.35 mmol) in CH3CN (5 mL) was added PrBr (166 mg, 1.35 mmol). The reaction mixture was refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give (2R,4S)-6-bromo-2-phenyl-1′-propyl-2′-(propylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (75 mg, 47%).
A solution of (2R,4S)-6-bromo-2-phenyl-1′-propyl-2′-(propylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (75 mg, 0.16 mmol), and NH4I (46 mg, 0.32 mmol) in NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford (2R,4S)-2′-amino-6-bromo-2-phenyl-1′-propylspiro-[chroman-4,4′-imidazol]-5′(1′H)-one (15 mg, 23%). 1H-NMR (MeOD): 1.00 (m, 3H), 1.45 (m, 2H), 2.23 (m, 1H), 2.48 (m, 1H), 3.75 (m, 2H), 5.85 (m, 1H), 6.90 (m, 1H), 7.14 (m, 1H), 7.40 (m, 6H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and pyridin-4-ylboronic acid (13 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(pyridin-4-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (2.51 mg, 10%). 1H-NMR (MeOD): 2.50 (t, 1H), 2.64 (dd, 1H), 3.37 (s, 3H), 5.91 (d, 1H), 7.26 (d, 1H), 7.45 (m, 5H), 7.82 (d, 1H), 7.94 (t, 1H), 8.16 (s, 2H), 8.71 (s, 2H).
A mixture of 2-cyclopropylethanol (2 g, 0.023 mol) and pyridine (0.51 g, 0.006 mol) was added dropwise with magnetic stirring over 2 hours to PBr3 (2.5 g, 0.009 mol) at 0° C. Then ether was added and the mixture was washed with an aqueous NaHCO3 solution and brine. The organic layer was dried over Na2SO4 and concentrated in vacuo to give (2-bromoethyl)cyclopropane (1.3 g, 38%). 1H-NMR (CDCl3): 0.01 (m, 2H), 0.40 (m, 2H), 0.69 (m, 1H), 1.51 (m, 2H), 4.08 (m, 2H).
A mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (250 mg, 0.644 mmol), excess (2-bromoethyl)cyclopropane (381 mg, 2.58 mmol), and solid K2CO3 (356 mg, 2.58 mmol) in CH3CN (10 mL) was stirred for 4 hours at 60° C. The mixture was filtered and the filtrate was concentrated. The crude product was purified by preparative TLC to give 6-bromo-1′-(2-cyclopropylethyl)-2′-(2-cyclopropylethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 11%).
A solution of 6-bromo-1′-(2-cyclopropylethyl)-2′-(2-cyclopropylethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 0.076 mmol), and NH4I (22 mg, 0.153 mmol) in a solution of NH3/EtOH (4 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-(2-cyclopropylethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (8 mg, 24%). 1H-NMR (MeOD): 0.01 (m, 2H), 0.34 (m, 2H), 0.61 (m, 1H), 1.48 (m, 2H), 2.10 (m, 1H), 2.37 (m, 1H), 3.67 (m, 2H), 5.12 (d, 0.3H), 5.74 (d, 0.7H), 6.70 (m, 1H), 7.00 (m, 1H), 7.31 (m, 6H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(isobutylcarbamoyl)-phenyl-boronic acid (23 mg, 0.1 mmol). The mixture was heated at 120° C. in a microwave reactor for 30 mins. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-isobutylbenzamide (1.28 mg, 5%). 1H-NMR (MeOD): 0.96 (d, 6H), 1.94 (m, 1H), 2.15 (d, 1H), 2.47 (t, 1H), 3.29 (s, 3H), 3.31 (s, 1H), 3.32 (s, 1H), 5.30 (d, 1H), 7.06 (t, 2H), 7.33 (m, 1H), 7.42 (t, 2H), 7.48 (d, 3H), 7.53 (d, 1H), 7.66 (d, 1H), 7.72 (d, 1H), 7.91 (s, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-(pyrrolidine-1-carbonyl)phenylboronic acid (10 mg, 0.045 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 2′-amino-1′-methyl-2-phenyl-6-(3-(pyrrolidine-1-carbonyl)phenyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (2.10 mg, 8%). 1H-NMR (MeOD): 1.82 (m, 2H), 1.91 (m, 2H), 2.04 (m, 1H), 2.21 (m, 1H), 3.02 (s, 3H), 3.39 (t, 2H), 3.52 (t, 2H), 5.82 (d, 1H), 6.95 (d, 1H), 7.15 (m, 1H), 7.27 (m, 1H), 7.34 (m, 3H), 7.46 (m, 4H), 7.54 (m, 2H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(methylsulfonamidomethyl)phenylboronic acid (24 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give N-(4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzyl)methanesulfonamide (4.26 mg, 17%). 1H-NMR (MeOD): 2.06 (m, 1H), 2.22 (m, 1H), 2.76 (s, 3H), 3.04 (s, 3H), 4.17 (s, 2H), 5.80 (m, 1H), 6.92 (m, 1H), 7.10 (m, 1H), 7.24 (m, 1H), 7.32 (m, 4H), 7.37 (m, 2H), 7.39 (m, 2H), 7.41 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (15 g, 70.1 mmol), 2-fluorobenzaldehyde (8.7 g, 70.1 mmol), and borax (26.7 g, 70.1 mmol) in ethanol (90 mL) and H2O (150 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O, and extracted with ether. The ether was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2-(2-fluorophenyl)chroman-4-one (15 g, 50%).
A steel bomb was charged with a mixture of 6-bromo-2-(2-fluorophenyl)chroman-4-one (2 g, 6.25 mmol), KCN (0.82 g, 12.5 mmol), and (NH4)2CO3 (4.5 g, 46.87 mmol). Formamide (25 mL) was added to fill the steel bomb nearly completely. The mixture was heated at 70° C. for 48 h then at 110° C. for another 12 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by column to give 6-bromo-2-(2-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (250 mg, 10%).
A suspension of 6-bromo-2-(2-fluorophenyl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (250 mg, 0.64 mmol) and Lawesson's Reagent (259 mg, 0.64 mmol) in anhydrous 1,4-dioxane (20 mL) was heated under reflux for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-2-(2-fluorophenyl)-2′-thioxospiro-[chroman-4,4′-imidazolidin]-5′-one (180 mg, 67%).
To a solution of 6-bromo-2-(2-fluorophenyl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (180 mg, 0.443 mmol) in MeOH (10 mL) was added a solution of NaOH (35.46 mg, 0.887 mmol) in H2O (2 mL). After stiffing for 10 minutes, MeI (951 mg, 6.65 mmol) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-bromo-2-(2-fluorophenyl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 41%).
A solution of 6-bromo-2-(2-fluorophenyl)-1′-methyl-2′-(methylthio)spiro-[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 0.183 mmol) and NH4I (53.21 mg, 0.367 mmol) in NH3/EtOH (2 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-(2-fluorophenyl)-1′-methylspiro-[chroman-4,4′-imidazol]-5′(1′H)-one (52 mg, 70%).
1H-NMR (MeOD): 2.15 (d, 1H), 2.25 (d, 1H), 3.20 (s, 3H), 6.15 (d, 1H), 6.78 (d, 1H), 6.99 (t, 1H), 7.05 (s, 1H), 7.15 (t, 1H), 7.25 (d, 2H), 7.50 (t, 1H).
Anhydrous aluminum chloride (88 g, 0.66 mol) was suspended in methylene chloride (1500 mL), and then acetyl chloride (51.5 g, 0.66 mol) was added while stiffing and cooling on ice. The mixture was stirred for 20 minutes while cooling on ice and 4-methylphenol (50 g, 0.46 mol) was added. The reaction mixture was stirred at room temperature for 1 h, and then poured into ice water slowly to quench the reaction. After extraction with ethyl acetate, the organic layer was washed with brine and then dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield acetic acid 4-methyl-phenyl ester (52.6 g, 76%). 1H-NMR (CDCl3): 2.25 (s, 3H), 2.36 (s, 3H), 6.96 (d, 2H), 7.18 (d, 2H).
A mixture of 4-methylphenyl acetate (52.6 g, 0.35 mol) and anhydrous aluminum chloride (94 g, 0.70 mol) was stirred at 120-140° C. for 20 minutes. The reaction mixture was cooled to 60-80° C. and ice water was slowly added. The reaction mixture was then extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield 2′-hydroxy-5′-methyl-acetophenone (32 g, 61%). 1H-NMR (CDCl3): 2.28 (s, 3H), 2.57 (s, 3H), 6.83 (d, 1H), 7.25 (d, 1H), 7.46 (s, 1H), 12.01 (s, 1H).
A mixture of 1-(2-hydroxy-5-methyl-phenyl)-ethanone (15 g, 0.10 mol), benzaldehyde (10.6 g, 0.10 mol) and borax (38 g, 0.10 mol) in ethanol (90 mL) and H2O (150 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ether. The ether was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-methyl-2-phenyl-chroman-4-one (8.1 g, 34%). 1H-NMR (CDCl3): 2.32 (s, 3H), 2.86 (d, 1H), 3.06 (t, 1H), 5.44 (d, 1H), 6.96 (d, 1H), 7.38 (d, 1H), 7.44 (m, 5H), 7.71 (s, 1H).
A steel bomb was charged with a mixture of 6-methyl-2-phenyl-chroman-4-one (1 g, 4.2 mmol), potassuim cyanide (0.82 g, 12.6 mmol), and (NH4)2CO3 (3.03 g, 31.5 mmol). Formamide (20 mL) was added to fill the steel bomb nearly completely. The mixture was heated at 70° C. for 24 h and then at 110° C. for another 48 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl was performed to give a precipitate which was filtered, washed twice with water. The precipitate was dissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 6-methyl-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (0.42 g, 32%).
A suspension of 6-methyl-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (200 mg, 0.65 mmol) and Lawesson's Reagent (263 mg, 0.65 mmol) in anhydrous 1,4-dioxane (8 mL) was refluxed for 24 h. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-methyl-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (35 mg, 17%). 1H-NMR (CDCl3): 2.28 (s, 3H), 2.47 (d, 1H), 2.51 (d, 1H), 5.30 (s, 1H), 6.92 (s, 1H), 6.70 (d, 2H), 7.10 (m, 1H), 7.41 (m, 1H), 8.18 (s, 1H).
To a solution of 6-methyl-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (55 mg, 0.17 mmol) in MeOH (5 mL) was added a solution of NaOH (13 mg, 0.34 mmol) in H2O (1 mL). After stiffing for 10 min, MeI (363 mg, 2.55 mmol) was added. The reaction mixture was refluxed for 2 h. The mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to give 1′,6-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′-(1′H)-one (40 mg, 67%).
A solution of 1′,6-dimethyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′-(1′H)-one (40 mg, 0.12 mmol), and NH4I (35 mg, 0.24 mmol) in NH3/EtOH (4 mL, 1.5N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC and preparative HPLC to afford 2′-amino-1′,6-dimethyl-2-phenylspiro[chroman-4,4′-imidizol]-5′(1′H)-one (2.03 mg, 6%). 1H-NMR (MeOD): 2.28 (s, 3H), 2.40 (d, 1H), 2.55 (d, 1H), 3.28 (s, 3H), 5.74 (d, 1H), 6.92 (d, 1H), 7.13 (s, 1H), 7.35 (d, 1H), 7.40-7.50 (m, 6H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(N,N-dimethyl-sulfamoyl)phenylboronic acid (23.8 mg, 0.104 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give pure 4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N,N-dimethylbenzenesulfonamide (2.4 mg, 9%). 1H-NMR (CDCl3): 2.31 (t, 1H), 2.57 (t, 1H), 2.78 (s, 6H), 3.33 (d, 3H), 3.56 (s, 2H), 5.88 (d, 1H), 7.20 (d, 1H), 7.26 (s, 1H), 7.48 (m, 5H), 7.57 (m, 1H), 7.62 (d, 2H), 7.80 (d, 2H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 2-(dimethylcarbamoyl)phenylboronic acid (20 mg, 0.104 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 2-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N,N-dimethylbenzamide (1.60 mg, 6%). 1H-NMR (MeOD): 2.45 (m, 3H), 2.56 (m, 1H), 2.64 (m, 1H), 2.86 (m, 3H), 3.36 (s, 3H), 5.81 (m, 1H), 7.14 (m, 1H), 7.21 (m, 1H), 7.33 (m, 1H), 7.44 (m, 9H).
To the suspension of anhydrous aluminum chloride (84.0 g, 0.49 mol) in methylene chloride (1200 mL) was add acetyl chloride (49.2 g, 0.63 mol) while stirring and cooling on ice. The mixture was stirred for 20 minutes while cooling on ice followed by addition of 4-bromophenol (98 g, 0.57 mol). The reaction mixture was stirred at room temperature for 1 h and then ice water was added. The reaction mixture was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield 4-bromophenyl acetate (104.0 g, 85%). 1H-NMR (CDCl3): 2.28 (s, 3H), 6.98 (d, 2H), 7.48 (d, 2H).
A mixture of 4-bromophenyl acetate (104.0 g, 0.48 mol) and anhydrous aluminum chloride (130.5 g, 0.968 mol) was stirred at 120-140° C. for 20 minutes. The reaction mixture was cooled to 60-80° C. and ice water was added. The reaction mixture was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography to yield 1-(5-bromo-2-hydroxyphenyl)-ethanone (101.0 g, 98%). 1H-NMR (CDCl3): 2.60 (s, 3H), 6.87 (d, 1H), 7.53 (dd, 1H), 7.81 (s, 1H), 12.12 (s, 1H).
A solution of 1-(5-bromo-2-hydroxyphenyl)-ethanone (21.4 g, 0.1 mol), acetone (365 mL) and pyrrolidine (8.4 mL) in toluene (220 mL) was refluxed for 4 h. To the reaction mixture was added acetone (36.5 mL). The mixture was refluxed for 15 h. Then 1 N HCl (220 mL) was added, and the resulting mixture was extracted with ethyl acetate (200 mL, 3×). The combined organic layers were washed with water (150 mL), brine (150 mL), dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2,2-dimethyl-chroman-4-one (18.0 g, 71%). 1H-NMR (CDCl3): 1.45 (s, 6H), 2.71 (s, 2H), 6.82 (d, 1H), 7.52 (dd, 1H), 7.96 (d, 1H).
A glass pressure tube was charged with a mixture of 6-bromo-2,2-dimethyl-chroman-4-one (6.4 g, 25 mmol), KCN (3.25 g, 50 mmol), and (NH4)2CO3 (18 g, 187.5 mmol). Formamide (80 mL) was added to fill the pressure tube nearly completely. The resulting mixture was heated at 70° C. for 24 h then at 110° C. for another 48 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl yielded a precipitate which was filtered, washed twice with water, and then redissolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give a residue, which was purified by column to give 6-bromo-2,2-dimethylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (8.2 g, 100%). 1H-NMR (DMSO): 1.24 (s, 3H), 1.40 (s, 3H), 2.16 (d, 1H), 2.30 (d, 1H), 6.80 (d, 1H), 7.10 (m, 1H), 7.39 (d, 1H), 8.69 (s, 1H), 11.08 (brs, 1H).
6-Bromo-2,2-dimethylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (4.0 g, 12.3 mmol) and 1 M Et3O.BF4 (4.7 g, 24.7 mmol) were dissolved in dry CH2Cl2 (100 mL). Then the mixture was refluxed for 24 h. The solvent was removed in vacuo to give a residue, which was purified by column to give 6-bromo-2′-ethoxy-2,2-dimethylspiro-[chroman-4,4′-imidazol]-5′(3′H)-one (1.0 g, 25%).
To a solution of 6-bromo-2′-ethoxy-2,2-dimethylspiro[chroman-4,4′-imidazol]-5′(3′H)-one (500 mg, 1.42 mmol) in EtOH (30 mL) was added NH3.H2O (30 mL). The mixture was refluxed for 18 h. The solvent was removed in vacuo to give a residue, which was purified by preparative TLC to give 2′-amino-6-bromo-2,2-dimethylspiro[chroman-4,4′-imidazol]-5′(3′H)-one (120 mg, 30%).
To a solution of 2′-amino-6-bromo-2,2-dimethyl-spiro[chroman-4,4′-imidazol]-5′(3′H)-one (45 mg, 0.131 mmol) in THF (3 mL) at 0° C. under N2 was added NaH (5.3 mg, 0.131 mmol). The resulting mixture was stirred for 1 h at room temperature. Then MeI (18.6 mg, 0.131 mmol) was added. The mixture was quenched with water and extracted with ethyl acetate. The organic layer was concentrated in vacuo. The residue was purified by preparative TLC to give 2′-amino-6-bromo-1′,2,2-trimethylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 80%) and 6-bromo-1′,2,2-trimethyl-2′-(methylamino)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (5 mg, 10%).
1H-NMR (MeOD): 1.3 (s, 3H), 1.40 (s, 3H), 1.85 (d, 1H), 2.25 (d, 1H), 3.1 (s, 3H), 6.65 (d, 1H), 6.8 (s, 1H), 7.20 (s, 1H) (67).
1H-NMR (MeOD): 1.3 (s, 3H), 1.40 (s, 3H), 1.85 (d, 1H), 2.25 (d, 1H), 2.8 (s, 3H), 3.0 (s, 3H), 6.65 (d, 1H), 6.8 (s, 1H), 7.20 (s, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-(cyclohexylmethyl)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(dimethylcarbamoyl)phenylboronic acid (20.1 mg, 0.104 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N,N-dimethylbenzamide (7.97 mg, 34%). 1H-NMR (MeOD): 2.07 (m, 1H), 2.24 (m, 1H), 3.00 (m, 6H), 3.11 (m, 3H), 5.22 (d, 0.3H), 5.86 (d, 0.7H), 6.97 (m, 1H), 7.18 (m, 1H), 7.28 (m, 1H), 7.34 (m, 2H), 7.39 (m, 4H), 7.46 (m, 1H), 7.54 (m, 2H).
To a mixture of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (250 mg, 0.64 mmol) and K2CO3 (356 mg, 2.6 mmol) in CH3CN (8 mL) was added EtI (402 mg, 2.6 mmol). The reaction mixture was refluxed for 2 h. The mixture was filtered, and the filtrate was concentrated to give a residue, which was purified by preparative TLC to give 6-bromo-1′-ethyl-2′-(ethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (195 mg, 69%).
A solution of 6-bromo-1′-ethyl-2′-(ethylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (195 mg, 0.44 mmol), NH4I (128 mg, 0.88 mmol) in NH3/EtOH (5 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuo to give a residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-1′-ethyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (42 mg, 24%). 1H-NMR (MeOD): 1.12 (m, 3H), 1.98 (m, 1H), 3.16 (m, 1H), 3.54 (m, 2H), 5.75 (m, 1H), 6.77 (m, 1H), 6.95 (m, 1H), 7.23 (m, 2H), 7.33 (m, 4H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.099 mmol) in 1,4-dioxane (1.2 mL), Cs2CO3 (2 N, 0.3 mL) and 1-(tert-butoxycarbonyl)-1H-pyrrol-2-ylboronic acid (30 mg, 0.142 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure tert-butyl 2-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-1H-pyrrole-1-carboxylate (0.8 mg, 2%). 1H-NMR (MeOD): 1.40 (s, 9H), 2.44 (m, 1H), 2.61 (m, 1H), 3.25 (s, 3H), 5.85 (d, 1H), 6.14 (m, 1H), 6.23 (m, 1H), 7.05 (m, 1H), 7.16 (m, 1H), 7.32 (m, 2H), 7.49 (m, 5H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL CEM test tube under Ar was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(diethylcarbamoyl)phenylboronic acid (23 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 mins. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydro-spiro[chroman-4,4′-imidazole]-6-yl)-N,N-diethylbenzamide (6.95 mg, 28%). 1H-NMR (MeOD): 1.13 (s, 3H), 1.24 (d, 3H), 2.13 (d, 1H), 2.30 (s, 1H), 3.17 (s, 3H), 3.32 (d, 4H), 5.91 (d, 1H), 7.03 (d, 1H), 7.22 (s, 1H), 7.33 (m, 1H), 7.40 (m, 4H), 7.49 (m, 2H), 7.51 (m, 1H), 7.57 (m, 2H).
To the solution of 3,4-dihydro-2H-pyran (126 g, 1.5 mol) in dry THF (1100 mL) was added a solution of B2H6 in Me2S (10 M, 75 mL, 0.75 mol) under nitrogen atmosphere at 0° C. The mixture was stirred at this temperature for 3 h, and then 25° C. for another 2 h. The mixture was warmed to 40° C.˜45° C., and aq. NaOH (3 N, 300 mL) and H2O2 (30%, 170 mL) were added. After stiffing for 2 h, the reaction was quenched by saturated brine. The reaction mixture was filtered, and the filtrate was extracted with EtOAc (3×300 mL). The organic phase was washed with aq. Na2S2O3 (3×100 mL), dried over Na2SO4, and concentrated in vacuum to give the crude product, which was purified by distillation to give the product (43 g, 33%). 1H-NMR (CDCl3): 1.1.51-1.61 (m, 2H), 1.78-1.91 (m, 4H), 3.40 (m, 1H), 3.54-3.65 (m, 2H), 3.69-3.76 (m, 2H).
To a solution of tetrahydro-pyran-3-ol (30 g, 0.29 mol) in dry CH2Cl2 (900 mL) was added 3 Å molecule sieves (30 g) and PCC (94.9 g, 0.44 mol). The mixture was stirred at room temperature overnight. When the reaction was completed, the mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuum to give the crude product, which was distilled in vacuo to give dihydro-pyran-3-one (10.5 g, 36%). 1H-NMR (CDCl3): 2.06-2.13 (m, 2H), 2.53 (m, 2H), 3.85 (m, 2H), 4.02 (s, 2H).
A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (17.3 g, 0.081 mol), dihydro-pyran-3-one (10.5 g, 0.105 mol) and pyrrolidine (7.5 g, 0.105 mol) in toluene (200 mL) was stirred vigorously at room temperature overnight. Then the mixture was refluxed overnight. After cooling, the mixture was treated with water (100 mL) and extracted with ethyl acetate (200 mL*3). The combined organic layers were concentrated and the residue was purified by column to give the product 72i (12 g, 50%). 1H-NMR (CDCl3): 1.49 (m, 1H), 1.65 (m, 1H), 1.86 (m, 1H), 2.04 (m, 1H), 2.63 (t, 2H), 3.48 (m, 2H), 3.79 (m, 2H), 6.88 (d, 1H), 7.50 (dd, 1H), 7.89 (m, 1H).
A pressure tube was charged with a mixture of the compound 72i (12 g, 0.04 mol), KCN (5.27 g, 0.08 mol), and (NH4)2CO3 (28.8 g, 0.3 mol). Formamide (65 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 70° C. for 72 h then at 110° C. for another 3 h. The reaction mixture was then cooled and poured over ice. After acidification with concentrated HCl, the mixture was extracted with ethyl acetate (150 mL*3). The combined organic layers were dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give the compound 72ii (7.8 g, 53%). 1H-NMR (CDCl3): 1.74-2.12 (m, 4H), 2.36 (m, 1H), 2.47 (m, 1H), 3.51-3.55 (m, 4H), 6.85 (m, 1H), 7.18 (m, 1H), 7.32 (m, 1H), 8.18 (d, 1H), 8.93 (s, 1H).
A suspension of 72ii (600 mg, 1.638 mmol) and Lawesson's Reagent (662 mg, 1.638 mmol) in dry 1,4-dioxane (6 mL) was heated at 110° C. for 0.5 h in a CEM microwave reactor. The mixture was concentrated in vacuo and the residue was purified by column to give the compound 72iii (385 mg, 61%). 1H-NMR (CDCl3): 1.52-1.74 (m, 2H), 1.95 (m, 2H), 2.15 (m, 1H), 2.49 (m, 1H), 3.56 (m, 2H), 3.84 (m, 2H), 7.12 (m, 1H), 7.35 (m, 1H), 7.14 (s, 1H), 9.14 (s, 1H).
To a solution of 72iii (192 mg, 0.5 mmol) in MeOH (20 mL) was added a solution of NaOH (1.9 mL, 0.6 N). After stirring for 5 min, MeI (0.4 mL) was added. The reaction mixture was heated at 60° C. for 10 minutes in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 72iv (93 mg, yield 45%).
A solution of 72iv (93 mg, 0.227 mmol), NH4I (82 mg, 0.567 mmol) in NH3/EtOH (7 mL, 5 N) was heated at 110° C. in a CEM tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuum to give the residue, which was purified by preparative TLC to afford the amine 72v (45 mg, 53%).
Pd(PPh3)2Cl2 (20 mg, 0.029 mmol) in a 10 mL flask under Ar was treated sequentially with the amine 72v (45 mg, 0.12 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.6 mL) and 3-cyanophenylboronic acid (35.3 mg, 0.24 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure final product 72 (22.6 mg, 46%). 1H-NMR (MeOD): 1.68 (m, 1H), 1.89 (m, 2H), 2.03 (m, 1H), 2.12 (m, 1H), 2.25 (t, 1H), 3.16 (s, 3H), 3.58 (m, 2H), 3.84 & 4.05 (m, 2H), 7.04 (m, 2H), 7.49-7.58 (m, 2H), 7.62 (m, 1H), 7.86 (m, 1H), 7.84 (m, 1H).
To a solution of 3,4-dihydro-2H-pyran (126 g, 1.5 mol) in dry THF (1100 mL) was added a solution of B2H6 in Me2S (10 M, 75 mL, 0.75 mol) under nitrogen atmosphere at 0° C. The mixture was stirred at this temperature for 3 h, and then 25° C. for another 2 h. The mixture was warmed to 40-45° C., and aqueous NaOH (3 N, 300 mL) and H2O2 (30%, 170 mL) were added. After stirring for 2 h, the reaction was quenched by saturated brine. The reaction mixture was filtered, and the filtrate was extracted with EtOAc (3×300 mL). The organic phase was washed with aq. Na2S2O3 (3×100 mL), dried over Na2SO4, and concentrated in vacuum to give the crude product, which was purified by distillation to give tetrahydro-pyran-3-ol (86 g, 33%). 1H-NMR (CDCl3): 1.51-1.61 (m, 2H), 1.78-1.91 (m, 4H), 3.40 (m, 1H), 3.54-3.65 (m, 2H), 3.69-3.76 (m, 2H).
To a solution of tetrahydro-pyran-3-ol (30 g, 0.29 mol) in dry CH2Cl2 (900 mL) was added 3 Å molecule sieves (30 g) and PCC (94.9 g, 0.44 mol). The mixture was stirred at room temperature overnight. When the reaction was completed, the mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuum to give the crude product, which was distilled in vacuo to give dihydro-pyran-3-one (10.5 g, 36%). 1H-NMR (CDCl3): 2.06-2.13 (m, 2H), 2.53 (m, 2H), 3.85 (m, 2H), 4.02 (s, 2H).
A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (17.3 g, 0.081 mol), dihydro-pyran-3-one (10.5 g, 0.105 mol) and pyrrolidine (7.5 g, 0.105 mol) in toluene (200 mL) was stirred vigorously at room temperature overnight. Then the mixture was refluxed overnight. After cooling, the mixture was treated with water (100 mL), extracted with ethyl acetate (200 mL*3). The combined organic layers were concentrated and the residue was purified by column to give the product 72i (12 g, 50%). 1H-NMR (CDCl3): 1.49 (m, 1H), 1.65 (m, 1H), 1.86 (m, 1H), 2.04 (m, 1H), 2.63 (t, 2H), 3.48 (m, 2H), 3.79 (m, 2H), 6.88 (d, 1H), 7.50 (dd, 1H), 7.89 (m, 1H).
A pressure tube was charged with a mixture of the compound 72i (12 g, 0.04 mol), KCN (5.27 g, 0.08 mol), and (NH4)2CO3 (28.8 g, 0.3 mol). Formamide (65 mL) was added to fill the pressure tube nearly completely. The mixture was heated at 65° C. for 72 h. The reaction mixture was then cooled and poured over ice. After acidification with concentrated HCl, the mixture was extracted with ethyl acetate (200 mL*3). The combined organic layers were dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give the compound 2 (7.8 g, 53%). 1H-NMR (CDCl3): 1.74-2.12 (m, 4H), 2.36 (m, 1H), 2.47 (m, 1H), 3.51-3.55 (m, 4H), 6.85 (m, 1H), 7.18 (m, 1H), 7.32 (m, 1H), 8.18 (d, 1H), 8.93 (s, 1H).
A suspension of 72ii (600 mg, 1.638 mmol) and Lawesson's Reagent (662 mg, 1.638 mmol) in dry 1,4-dioxane (6 mL) was heated under 110° C. for 0.5 h in a CEM microwave reactor. The mixture was concentrated in vacuo and the residue was purified by column to give the compound 3 (385 mg, 61%). 1H-NMR (CDCl3): 1.52-1.74 (m, 2H), 1.95 (m, 2H), 2.15 (m, 1H), 2.49 (m, 1H), 3.56 (m, 2H), 3.84 (m, 2H), 7.12 (m, 1H), 7.35 (m, 1H), 7.14 (s, 1H), 9.14 (s, 1H).
To a solution of 72iii (385 mg, 1.007 mmol) in MeOH (20 mL) was added a solution of NaOH (3.85 mL, 0.6 N). After stirring for 5 min, MeI (0.8 mL) was added. The reaction mixture was heated at 60° C. for 10 minutes in microwave. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 72iv (123 mg, yield 30%).
A solution of 72iv (123 mg, 0.3 mmol), NH4I (109 mg, 0.75 mmol) in NH3/EtOH (12 mL, 5 N) was heated at 110° C. in a CEM tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to afford the amine 72v (48 mg, 42%).
Pd(PPh3)2Cl2 (20 mg) in a 10 mL of microwave tube under Ar2 was treated sequentially with the amine 72v (45 mg, 0.12 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (35.3 mg, 0.24 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure final products 72 (3.71 mg), compound 72a (6.83 mg) and compound 72b (3.7 mg, total yield 30%).
Compound 72: 1H-NMR (MeOD): 1.53-1.69 (m, 1H), 1.88 (m, 1H), 2.06 (m, 2H), 2.32-2.46 (s, 2H), 3.30 (s, 3H), 3.59 (m, 2H), 3.76-3.94 (m, 2H), 7.10 (m, 1H), 7.41 (m, 1H), 7.54 (t, 1H), 7.63 (m, 2H), 7.84 (m, 1H), 7.92 (m, 1H).
Compound 72a: 1H-NMR (MeOD): 1.48 (m, 1H), 1.81 (m, 1H), 1.92 (m, 1H), 2.04 (m, 1H), 2.38 (m, 2H), 3.30 (s, 3H), 3.58 (m, 2H), 3.85 (m, 2H), 7.09 (d, 1H), 7.31 (m, 1H), 7.58 (m, 3H), 7.79 (m, 1H), 7.85 (m, 1H).
Compound 72b: 1H-NMR (MeOD): 1.65 (m, 1H), 1.92 (m, 1H), 2.02 (m, 1H), 2.10 (m, 1H), 2.45 (s, 2H), 3.31 (s, 3H), 3.63 (m, 2H), 3.77 (m, 2H), 7.09 (m, 1H), 7.40 (m, 1H), 7.55 (t, 1H), 7.64 (m, 2H), 7.83 (m, 1H), 7.92 (m, 1H).
A suspension of the compound 73i (300 mg, 0.79 mmol) and Lawesson's Reagent (320 mg, 0.79 mmol) in dry 1,4-dioxane (4 mL) was heated at 110° C. for 45 minutes in a microwave reactor. The mixture was concentrated in vacuo and the residue was purified by preparative TLC (PE:EtOAc=3:1) to give the compound 73ii (229 mg, 73%).
To a solution of the compound 73ii (187 mg, 0.47 mmol) in 1,4-dioxane (19 mL) was added a solution of NaOH (0.6 N, 1.87 mL) and MeI (0.152 mL). The reaction mixture was heated at 60° C. for 20 minutes in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC (PE: EtOAc 6:1) to give the compound 73iii (150 mg, 75%). 1H NMR (CDCl3/400M): δ 7.25-7.19 (m, 1H), 6.74-6.69 (m, 2H), 3.13 (s, 3H), 2.58-2.50 (m, 4H), 2.31-2.19 (m, 1H), 2.18-2.05 (m, 1H), 2.03-1.95 (m, 1H), 1.90-1.60 (m, 3H), 1.51-1.40 (m, 1H), 1.39-1.15 (m, 3H), 0.95-0.80 (m, 3H).
A solution of the compound 73iii (127 mg, 0.3 mmol), NH4I (87 mg, 0.6 mmol) in NH3/EtOH (12.7 mL, 1.5 N) was heated at 120° C. in a tube in a microwave reactor for 3 hours. After cooling, the mixture was concentrated in vacuo to give the residue, which was diluted in CH2Cl2 and filtered to separate off NH4I. The solution was concentrated in vacuo and purified by preparative TLC (CH2Cl2: CH3OH 11:1) to afford the compound 73iv (85 mg, 72%).
Pd(PPh3)2Cl2 (18 mg) in a 10 mL tube under Ar was treated sequentially with the compound 73iv (55 mg, 0.14 mmol) in 1,4-dioxane (5.2 mL), Cs2CO3 (2 N, 0.78 mL) and 3-cyanophenylboronic acid (41.25 mg, 0.28 mmol). The mixture was heated in a microwave reactor at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC (CH2Cl2: CH3OH 13:1) and then by preparative HPLC to give the Compound 73 (32 mg, 43%). 1H NMR (MeOD/400M): δ 7.91 (s, 1H), 7.84 (d, 1H, 9.2 Hz), 7.66-7.40 (m, 3H), 7.39 (s, 1H), 7.02-6.98 (m, 1H), 3.30 (s, 3H), 2.64-2.59 (m, 1H), 2.37-2.32 (m, 1H), 2.30-2.09 (m, 2H), 2.08-1.92 (m, 2H), 1.91-1.66 (m, 1H), 1.65-1.51 (m, 1H), 1.50-1.21 (m, 3H), 0.98-0.88 (m, 3H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (20 g, 0.093 mol), 4-methylcyclohexanone (21.31 g, 0.187 mol) and pyrrolidine (12.63 g, 0.178 mol) in methanol (400 mL) was refluxed for overnight. The reaction mixture was concentrated in vacuo, diluted with an equal volume of H2O and then added HCl until pH=1. The resulting mixture was extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-4′-methylspiro(chroman-2,1′-cyclohexan)-4-one (45 g, 100%).
A glass pressure tube was charged with a mixture of 6-bromo-4′-methylspiro(chroman-2,1′-cyclohexan)-4-one (2 g, 6.47 mmol), KCN (0.84 g, 12.94 mmol), and (NH4)2CO3 (4.66 g, 48.525 mmol). Formamide (10.352 mL) was added to fill the tube nearly completely. The mixture was heated at 110° C. for 1.5 h with microwave. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give 6-bromo-4′-methylspiro(chroman-4,4′-imidazolidine)-2′,5′-dione (270 mg, 11%).
A suspension of 6-bromo-4′-methylspiro(chroman-4,4′-imidazolidine)-2′,5′-dione (270 mg, 0.712 mmol) and Lawesson's Reagent (287.81 mg, 0.712 mmol) in dry 1,4-dioxane (10.8 mL) was heated at 120° C. for 30 minutes in a microwave reactor. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give 6-bromo-4′-methylspiro-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (160 mg, 57%).
To a solution of 6-bromo-4′-methylspiro-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (40 mg, 0.1 mmol) in MeOH (4 mL) was added a solution of NaOH (8 mg, 0.2 mmol) and MeI (57.2 mg, 0.4 mol). The reaction mixture was heated at 60° C. for 10 minutes in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 6-bromo-4′-methylspiro-1′-methyl-2′-(methylthio)spiro-[chroman-4,4′-imidazol]-5′(1′H)-one (22.5 mg, 53%).
A solution of 6-bromo-4′-methylspiro-1′-methyl-2′-(methylthio)spiro-[chroman-4,4′-imidazol]-5′(1′H)-one (90 mg, 0.212 mmol), NH4I (246 mg, 1.696 mmol) in NH3/EtOH (2.5 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuo to give 2′-amino-6-bromo-4′-methylspiro-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (80 mg, 100%).
Pd(PPh3)2Cl2 (8 mg) in a 10 mL tube under Ar was treated sequentially with 2′-amino-6-bromo-4′-methylspiro-1′-methylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 0.0775 mmol) in 1,4-dioxane (3 mL), Cs2CO3 (2 N, 0.4 mL) and 3-cyanophenylboronic acid (24.03 mg, 0.13175 mmol). The mixture was heated in a microwave reactor at 60° C. for 10 minutes. The reaction mixture was concentrated in vacuo give the residue, which was purified by preparative TLC and then by preparative HPLC to give Compound 75 (6.5 mg, 8%). 1H-NMR (MeOD): 0.98 (d, 3H), 1.21 (m, 2H), 1.58 (t, 2H), 1.65 (m, 2H), 2.0 (d, 2H), 2.4 (s, 2H), 2.68 (s, 3H), 3.31 (s, 3H), 7.0 (d, 1H), 7.40 (s, 1H), 7.59 (m, 3H), 7.86 (d, 2H), 7.11 (s, 1H).
In a 50 mL round bottom flask was added 1-(5-bromo-2-hydroxyphenyl)ethanone (2.0 g, 9.3 mmol), followed by cyclohexanone (0.96 mL, 9.3 mmol). MeOH (20 mL) was added to give a clear solution followed by pyrrolidine (1 mL). A condenser was attached to the flask, and the resulting solution was heated at 60° C. overnight. MeOH was removed and the residue was redissolved in EtOAc (30 mL), washed with 1 N NaOH (10 mL) and 1 N HCl (10 mL), and then dried over Na2SO4. Solvent was removed in vacuo to give 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (2.25 g, 82%), which is used for the next step without purification.
A 10 mL CEM microwave test tube was filled with a mixture of 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (0.32 g, 1.08 mmol), KCN (0.15 g, 2.2 mmol), and (NH4)2CO3 (0.8 g, 7.7 mmol). A 2:1 mixture of formamide and DMF (6.5 to 7 mL) was added to fill the test tube nearly completely. The resulting mixture as heated in a CEM microwave reactor at 65° C. for 5 hrs. Another 3 tubes (total 1.28 g) were irradiated under the same conditions, and the resulting mixtures were combined, acidified with concentrated HCl, diluted with EtOAc (20 mL), and washed with H2O (10 mL×3). The organic layer was dried over Na2SO4, and solvent was removed in vacuo to give a crude product, which was purified by flash chromatography (0 to 60% EtOAc/hexane) to give cyclohexyl-spiro-hydanton (0.61 g, 55% corrected for recovered starting material 0.38 g). MS m/z 365 (M+H+).
To a solution of the above hydantoin (0.61 g, 1.66 mmol) in 1,4-dioxane (5 mL) in a 10 mL CEM microwave test tube was added Lawesson's reagent (0.67 g, 1.66 mmol). The resulting mixture was heated in a CEM microwave reactor at 110° C. for 30 min and cooled to room temperature. The solvent was removed in vacuo, and the residue was purified by flash chromatography to give the thiol-cyclohexyl-spiro-hydantoin (0.39 g, 62%). MS m/z 381 (M+H+).
To a solution of the above thiol-cyclohexyl-spiro-hydantoin (105.2 mg, 0.27 mmol) in MeOH (5 mL) in a 10 mL CEM microwave test tube was added a 0.6 N NaOH aqueous solution (1.0 mL). After stirring at room temperature for 10 min, MeI (158 mg, 1.08 mmol) was added, and the reaction mixture was heated in a CEM microwave reactor at 60° C. for 10 min. Another 3 tubes (95 mg, 0.25 mmol) were irradiated under the same conditions, and the resulting mixture were combined and concentrated in vacuo to give the crude product, which was purified by flash chromatography to give the dimethylated thiol-cyclohexyl-spiro-hydantoin (318.8 mg, 77%). MS m/z 409 (M+H+).
To a solution of the above dimethylated thiol-cyclohexyl-spiro-hydantoin (150 mg, 0.37 mmol) in MeOH (1 mL) in a 10 mL CEM microwave test tube was added NH4I (100 mg, 0.69 mmol) and NH3/MeOH (7 N, 2 mL). The resulting mixture was heated in a CEM microwave reactor at 120° C. for 30 min. Another tube (100 mg, 0.24 mmol) was also irradiated under the same conditions. The combined mixtures were concentrated in vacuo and the residue was redissolved in EtOAc (10 mL), washed with water (5 mL×3), and dried over Na2SO4. The solvent was then removed in vacuo to give the cyclohexyl-acyl-guanidine (181 mg, 78%) as a white solid, which is used for the next step without purification. MS m/z 378 (M+H+).
To a solution of the above cyclohexyl-acyl-guanidine (50 mg, 0.13 mmol) in 1,4-dioxane (2 mL) was added Cs2CO3 (142 mg, 0.43 mmol), 3-cyanophenylboronic acid (29.1 mg, 0.20 mmol), and a catalytical amount of PdCl2dppf. After degassing, the resulting mixture was heated in a CEM microwave reactor at 120° C. for 40 min Solvent was removed in vacuo and the residue was purified by reversed phase HPLC to give the final product 76 (21.3 mg, 40%) as a TFA salt. 1H NMR (400 MHz, CD3COCD3): 8.44 (br, 1H), 7.98 (s, 1H), 7.94 (d, 1H), 7.76 (m, 2H), 7.68 (m, 2H), 7.18 (d, 1H), 3.42 (s, 3H), 2.62, 2.46 (two d, 2H), 2.06-1.84 (m, 3H), 1.80-1.42 (m, 7H); MS m/z 401 (M+H+).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (10 g, 46.7 mmol), dihydro-2H-pyran-4(3H)-one (9.35 g, 93.45 mmol) and pyrrolidine (6.3 g, 88.8 mmol) in methanol (200 mL) was stirred overnight. The reaction mixture was removed in vacuo, and H2O was added. The resulting solution was extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-4-one (15 g, 100%). 1HNMR (CDCl3): 1.74 (m, 2H), (m, 2H), 1.94 (t, 2H), 2.71 (s, 2H), 3.76 (m, 4H), 6.91 (d, 1H), 7.54 (d, 1H), 7.96 (s, 1H).
A mixture of 6-bromo-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-4-one (10 g, 33.78 mmol), KCN (4.4 g, 67.57 mmol), (NH4)2CO3 (22.7 g, 236.46 mmol) and formamide (60 mL) in a 100 mL steel bomb was heated at 70° C. for 72 hrs. The reaction mixture was cooled and poured into ice water. Acidification with concentrated HCl was performed to give a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column chromatography to give the compound 77ii (9 g, 73%). 1H-NMR (MeOD): 1.83 (m, 4H), 2.22 (d, 1H), 2.46 (d, 1H), 3.68 (m, 2H), 3.82 (m, 1H), 3.93 (t, 1H), 6.89 (d, 1H), 7.18 (s, 1H), 7.38 (d, 1H), 8.04 (s, 1H).
A mixture of compound 77ii (300 mg, 0.82 mmol) and Lawesson's Reagent (331 mg, 0.82 mmol) in 1,4-dioxane (4.5 mL) was heated at 150° C. in a 10 mL CEM microwave test tube for 50 minutes. The reaction mixture was concentrated to give the residue, which was purified by preparative TLC to give the compound 77iii (40 mg, 13%).
A mixture of compound 77iii (60 mg, 0.16 mmol), NaOH solution (0.6 N, 06 mL) and CH3I (0.2 mL) in methanol (2 mL) was heated at 60° C. for 5 minutes in a CEM microwave reactor. The reaction mixture was concentrated and the residue was purified by preparative TLC to give the compound 77iv (28 mg, 44%).
A solution of compound 77iv (28 mg, 0.07 mmol), NH4I (20 mg, 0.14 mmol) in NH3/EtOH (3 mL, 1.5 N) was heated at 120° C. in a 10 mL CEM test tube in a microwave reactor for 3 hrs. After cooling, the mixture was concentrated in vacuo to give the residue, which was used for the next step without further purification (24 mg, 93%).
A mixture of compound 77v (24 mg, 0.06 mmol), 3-cyanophenylboronic acid (18.6 mg, 0.13 mmol), Pd(PPh3)2Cl2 (15 mg, 50%), and aqueous cesium carbonate solution (2 N, 0.3 mL) in dry 1,4-dioxane (1 mL) was heated at 120° C. in a microwave reactor for 35 minutes. The mixture was concentrated to give the residue, which was purified by preparative TLC to give pure final product Compound 77 (1.97 mg, 8%). 1H-NMR (MeOD): 1.84 (m, 3H), 2.05 (s, 1H), 2.34 (d, 1H), 2.51 (d, 1H), 3.29 (s, 3H), 3.73 (m, 3H), 3.93 (m, 1H), 7.13 (d, 1H), 7.42 (s, 1H), 7.63 (m, 3H), 7.84 (m, 1H), 7.92 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (10 g, 46.7 mmol), cycloheptanone (11 mL, 93.5 mmol) and pyrrolidine (7.7 mL, 93.5 mmol) in MeOH (190 mL) was stirred at room temperature overnight. The mixture was concentrated in vacuo to give the residue, which was added water and HCl (36%) until pH=1. The mixture was extracted with EtOAc and then the organic layer was concentrated to give 6-bromospiro[chroman-2,1′-cycloheptan]-4-one (18.3 g, 100%). 1H-NMR (CDCl3): 1.34 (m, 1H), 1.49 (m, 1H), 1.62 (m, 10H), 1.71 (m, 1H), 2.02 (m, 1H), 6.78 (m, 1H), 7.47 (m, 1H), 7.86 (m, 1H).
In a steel bomb, a mixture of 6-bromospiro[chroman-2,1′-cycloheptan]-4-one (1.5 g, 4.87 mmol), KCN (0.633 g, 9.74 mmol) and (NH4)2CO3 (3.5 g, 36.52 mmol) in formamide (30 mL) was heated to 70-75° C. for 3 days. The mixture was poured into ice/water. Concentrated HCl was added until pH=1. The mixture was filtered, and the filtrate was extracted with CH2Cl2. The organic layer was concentrated to give compound 78i (370 mg, 20%). 1H-NMR (DMSO): 1.79 (m, 4H), 1.96 (m, 6H), 2.13 (m, 1H), 2.22 (m, 2H), 2.36 (m, 1H), 7.19 (m, 1H), 7.50 (m, 1H), 7.72 (m, 1H).
A mixture of compound 78i (75 mg, 0.20 mmol) and Lawesson's Reagent (80 mg, 0.20 mmol) in 1,4-dioxane (1.2 mL) was stirred at 110° C. overnight. The solvent was removed in vacuo and the residue was purified by preparative TLC to give compound 78ii (10 mg, 13%).
To a mixture of compound 78ii (35 mg, 0.089 mmol) and NaOH (0.2 mL, 0.6 N) in MeOH (3 mL) was added MeI (52 mg, 0.356 mmol). The reaction mixture was stirred in a microwave reactor at 60° C. for 15 minutes. The mixture was concentrated to give the residue, which was purified by preparative TLC to give compound 78iii (20 mg, 53%).
A solution of compound 78iii (20 mg, 0.047 mmol) and NH4I (14 mg, 0.094 mmol) in NH3/EtOH (2 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to afford compound 78iv (10 mg, 50%).
Pd(PPh3)2Cl2 (5 mg, 0.005 mmol) in a 10 mL flask under Ar was treated sequentially with compound 78iv (10 mg, 0.025 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.15 mL) and 3-cyanophenylboronic acid (8 mg, 0.05 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC twice to give pure Compound 78 (2.25 mg, 20%). 1H-NMR (MeOD): 1.41 (m, 2H), 1.60 (m, 4H), 1.80 (m, 3H), 2.01 (m, 3H), 2.16 (m, 1H), 2.22 (m, 1H), 2.82-3.05 (m, 3H), 6.85 (m, 1H), 6.91 (m, 1H), 7.37 (m, 1H), 7.48 (m, 1H), 7.54 (m, 1H), 7.68 (m, 1H), 7.71 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (15.8 g, 73.8 mmol), cyclopentanone (12.35 g, 147 mmol) and pyrrolidine (12 mL, 140 mmol) in MeOH (300 mL) was stirred at room temperature overnight. The mixture was concentrated in vacuo to give the residue, which was added water and HCl (36%) until pH=1. The mixture was extracted with EtOAc and then the organic layer was concentrated to give 6-bromospiro[chroman-2,1′-cyclopentan]-4-one (23 g, 100%). 1H-NMR (CDCl3): 1.64 (m, 4H), 1.72 (m, 2H), 2.03 (m, 2H), 2.78 (s, 2H), 6.78 (m, 1H), 7.48 (m, 1H), 7.91 (m, 1H).
In a steel bomb, a mixture of 6-bromospiro[chroman-2,1′-cyclopentan]-4-one (1.5 g, 5.36 mmol), KCN (0.7 g, 10.72 mmol) and (NH4)2CO3 (3.86 g, 40.22 mmol) in formamide (30 mL) was heated to 80° C. for 3 days. The mixture was poured into ice/water. Concentrated HCl was added until pH=1. The mixture was filtered, and the filtrate was extracted with CH2Cl2. The organic layer was concentrated to give compound 79i (1.75 g, 93%). 1H-NMR (CDCl3): 1.42 (m, 1H), 1.61 (m, 5H), 1.76 (m, 1H), 1.92 (m, 2H), 2.57 (m, 1H), 6.57 (m, 1H), 7.00 (s, 1H), 7.13 (m, 1H), 7.91 (m, 1H).
A mixture of compound 79i (375 mg, 1.07 mmol) and Lawesson's Reagent (430 mg, 1.07 mmol) in 1,4-dioxane (3.2 mL) was stirred at 110° C. overnight. The solvent was removed in vacuo and the residue was purified by preparative TLC to give compound 79ii (60 mg, 15%). 1H-NMR (CDCl3): 1.51 (m, 1H), 1.69 (m, 3H), 1.79 (m, 2H), 1.98 (m, 2H), 2.17 (m, 1H), 2.64 (m, 1H), 6.68 (m, 1H), 7.02 (m, 1H), 7.25 (m, 1H).
A mixture of compound 79ii (20 mg, 0.055 mmol) and NaOH (0.2 mL, 0.6 N) in 1,4-dioxan (2 mL) was added MeI (40 mg, 0.275 mmol). The reaction mixture was stirred in a microwave reactor at 60° C. for 10 minutes. The mixture was concentrated to give the residue, which was purified by preparative TLC to give compound 79iii (20 mg, 85%).
A solution of compound 79iii (20 mg, 0.051 mmol), NH4I (15 mg, 0.102 mmol) in NH3/EtOH (2 mL, 1.5 N) was heated at 110° C. in a tube in a microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to afford compound 79iv (10 mg, 54%).
Pd(PPh3)2Cl2 (5 mg, 0.005 mmol) in a 10 mL flask under Ar was treated sequentially with compound 79iv (10 mg, 0.027 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.15 mL) and 3-cyanophenylboronic acid (8 mg, 0.055 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC twice to give pure Compound 79 (2.25 mg, 21%). 1H-NMR (MeOD): 1.69 (m, 4H), 1.86 (m, 3H), 2.04 (m, 1H), 2.22 (m, 1H), 2.49 (m, 1H), 3.07 (s, 3H), 6.82 (m, 1H), 6.96 (m, 1H), 7.11 (m, 2H), 7.39 (m, 1H), 7.52 (m, 1H), 7.70 (m, 1H).
To a solution of the cyclohexyl-acyl-guanidine (57 mg, 0.15 mmol) in 1,4-dioxane (1.5 mL) was added Cs2CO3 (161 mg, 0.45 mmol), pyridin-4-ylboronic acid (28 mg, 0.22 mmol), and PdCl2dppf (6 mg, 5 mol %). After degassing, the resulting mixture was heated in a CEM microwave reactor at 120° C. for 30 min Solvent was removed in vacuo and the residue was purified by reverse phase HPLC to give the final product (9.5 mg, 16.8%) as a TFA salt. 1H NMR (400 MHz, CD3OD): 8.76 (d, 2H), 8.24 (d, 2H), 7.96 (dd, 1H), 7.78 (d, 1H), 7.18 (d, 1H), 3.30 (s, 3H), 2.44 (s, 2H), 2.00-1.80 (m, 3H), 1.76-1.48 (m, 6H), 1.42 (m, 1H); MS m/z 377 (M+H+).
A suspension of the compound 81i (300 mg, 0.69 mmol) and Lawesson's Reagent (280 mg, 0.69 mmol) in dry 1,4-dioxane (4 mL) was heated at 120° C. for 30 minutes under microwave. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give the compound 81ii (160 mg, 50%).
To a solution of the compound 81ii (160 mg, 0.36 mmol) in MeOH (12 mL) was added a solution of NaOH (0.6 N, 1.2 mL) and MeI (0.8 mL). The reaction mixture was heated at 60° C. for 10 min in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 81iii (80 mg, 50%).
A solution of the compound 81iii (80 mg, 0.168 mmol) and NH4I (195 mg, 1.34 mmol) in NH3/EtOH (2.5 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 3 h. After cooling, the mixture was concentrated in vacuo to give compound 811v (100 mg, 90%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with the compound 81 (30 mg, 0.067 mmol) in 1,4-dioxane (1.5 mL), Cs2CO3 (2 N, 0.4 mL) and 3-cyanophenylboronic acid (19.8 mg, 0.135 mmol). The mixture was heated in a microwave reactor at 120° C. for 35 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give the compound 81v (4.0 mg, 10%). 1H-NMR (MeOD): 1.36 (t, 1H), 1.52 (t, 2H), 1.70 (d, 1H), 1.87 (m, 1H), 2.00 (d, 1H), 2.15 (dd, 1H), 2.24 (t, 1H), 2.34 (d, 1H), 2.51 (m, 2H), 3.28 (s, 3H), 7.11 (d, 1H), 7.41 (t, 1H), 7.56 (t, 1H), 7.63 (m, 2H), 7.84 (d, 1H), 7.93 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (10 g, 46.7 mmol), 3-methylcyclohexanone (10.5 g, 93.4 mmol) and pyrrolidine (6.3 g, 88.8 mmol) in methanol (200 mL) was stirred overnight. The reaction mixture was concentrated in vacuo, and then H2O was added. The resulting solution was extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give 6-bromo-3′-methylspiro[chroman-2,1′-cyclohexan]-4-one (18 g, 100%). 1HNMR (CDCl3): 0.86 (m, 3H), 0.91 (m, 2H), 1.02 (m, 2H), 1.30 (m, 2H), 1.52 (m, 2H), 1.65 (m, 4H), 1.80 (m, 7H), 2.01 (m, 4H), 2.22 (m, 1H), 2.48 (m, 1H), 2.60 (s, 2H), 2.72 (t, 3H), 6.81 (m, 1H), 7.50 (m, 1H), 7.91 (m, 1H).
A pressure tube was charged with a mixture of 6-bromo-3′-methylspiro[chroman-2,1′-cyclohexan]-4-one (8 g, 19.48 mmol), KCN (3.37 g, 39 mmol), and (NH4)2CO3 (17.5 g, 136.36 mmol). Formamide (80 mL) was added to fill the tube nearly completely. The mixture was heated at 80° C. for 78 h. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate. The ethyl acetate solution was dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give the product 82i (8 g, 90%). 1HNMR (MeOD): 0.81 (d, 1H), 0.92 (m, 3H), 1.49 (m, 2H), 1.71 (d, 2H), 2.03 (d, 1H), 2.13 (s, 2H), 2.41 (dd, 1H), 6.78 (dd, 1H), 7.12 (d, 1H), 7.30 (m, 1H).
A suspension of the compound 82i (375 mg, 1 mmol) and Lawesson's Reagent (400 mg, 1 mmol) in dry 1,4-dioxane (3.5 mL) was heated at 110° C. for 30 min in a microwave reactor. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give the compound 82ii (100 mg, 30%).
To a solution of the compound 82ii (200 mg, 0.51 mmol) in MeOH (10 mL) was added a solution of NaOH (0.6 N, 2 mL) and MeI (0.6 mL). The reaction mixture was heated at 60° C. for 14 min in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 82iii (90 mg, 45%).
A solution of the compound 82iii (90 mg, 0.21 mmol) and NH4I (246 mg, 1.7 mmol) in NH3/EtOH (2.5 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuo to give the compound 82iv (90 mg, 90%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with the compound 82iv (30 mg, 0.076 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (22.56 mg, 0.15 mmol). The mixture was heated in a microwave reactor at 120° C. for 35 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give Compound 82 (2.58 mg, 10%). 1H-NMR (MeOD): 0.90 (dd, 3H), 0.95 (d, 1H), 1.25 (m, 2H), 1.60 (m, 2H), 1.90 (m, 4H), 2.30 (dd, 1H), 3.34 (s, 3H), 7.05 (dd, 1H), 7.38 (s, 1H), 7.61 (m, 3H), 7.84 (d, 1H), 7.92 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (6 g, 28 mmol), 3,5-dimethylcyclohexanone (7.12 g, 56 mmol) and pyrrolidine (3.8 g, 53.3 mmol) in methanol (120 mL) was stirred overnight. The reaction mixture was concentrated in vacuo, and
H2O was added. The resulting solution was extracted with ethyl acetate. The ethyl acetate solution was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give 6-bromo-3′,5′-dimethylspiro[chroman-2,1′-cyclohexan]-4-one (10 g, 100%). 1HNMR (CDCl3): 0.51 (m, 1H), 0.71 (m, 4H), 0.72 (m, 3H), 0.91 (m, 3H), 1.11 (d, 1H), 1.19 (t, 1H), 1.50 (s, 1H), 1.64 (t, 1H), 1.79 (m, 3H), 1.90 (m, 2H), 2.0 (m, 3H), 2.24 (t, 1H), 2.53 (s, 1H), 2.79 (s, 1H), 6.75 (t, 1H), 7.49 (t, 1H), 7.89 (d, 1H).
A tube was charged with a mixture of 6-bromo-3′,5′-dimethylspiro[chroman-2,1′-cyclohexan]-4-one (1.5 g, 4.64 mmol), KCN (0.6 g, 39.3 mmol), and (NH4)2CO3 (3.12 g, 32.48 mmol). Formamide (350 mL) was added to fill the tube nearly completely. The mixture was heated at 110° C. for 4 h in a microwave reactor. The reaction mixture was then cooled and poured over ice. Acidification with concentrated HCl gave a precipitate which was filtered, washed twice with water, and then dissolved in ethyl acetate, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to give the residue, which was purified by column to give the compound 83i (700 mg, 40%).
A suspension of the compound 83i (375 mg, 0.96 mmol) and Lawesson's Reagent (386 mg, 0.957 mmol) in dry 1,4-dioxane (3.5 mL) was heated at 110° C. for 30 min in a microwave reactor. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give the compound 83ii (200 mg, 60%).
To a solution of the compound 83ii (200 mg, 0.50 mmol) in MeOH (10 mL) was added a solution of NaOH (0.6 N, 2 mL) and MeI (0.6 mL). The reaction mixture was heated at 60° C. for 14 min in a microwave reactor. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 83iii (15 mg, 10%).
A solution of the compound 83iii (15 mg, 0.034 mmol) and NH4I (39.7 mg, 0.27 mmol) in NH3/EtOH (2.5 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 2 h. After cooling, the mixture was concentrated in vacuo to give the compound 83iv (20 mg, 100%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the compound 83iv (20 mg, 0.05 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (14.7 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 35 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give Compound 83 (2.7 mg, 10%). 1H-NMR (MeOD): 0.55 (dd, 1H), 0.87 (m, 6H), 1.20 (m, 2H), 1.70 (m, 5H), 2.35 (m, 1H), 2.51 (m, 1H), 6.99 (t, 1H), 7.34 (s, 1H), 7.54 (m, 3H), 7.81 (d, 1H), 7.89 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxyphenyl)ethanone (39 g, 181.8 mmol), tetrahydro-2H-pyran-3-carbaldehyde (20 g, 181.8 mmol) and borax (69.3 g, 181.8 mmol) in ethanol (240 mL) and H2O (400 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O and extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one (10 g, 20%).
To a solution of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one (300 mg, 0.98 mmol) in anhydrous DCM (8 mL) was added TiCl4 (1 M solution in DCM, 1.96 mL, 1.96 mmol) dropwise within 15 min at room temperature. It was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (400.7 mg, 2.15 mmol) dropwise. The resulting mixture was stirred for 18 h after the addition. The reaction mixture was poured into ice-water (100 g) and extracted with DCM (3×50 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-ylidene)cyanamide (300 mg, 100%), which was used in next step without further purification.
To a solution of methylhydroxylamine HCl salt (75 mg, 0.9 mmol) in anhydrous MeOH (10 mL) was added NaOMe (25 w % in MeOH, 0.13 mL), followed by (E)-N-(6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-ylidene)cyanamide (300 mg, 0.9 mmol). After stirring for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (20 mL). The mixture was filter, and the solvent was removed in vacuo. The resulting residue was purified by preparative TLC to give 20 mg of 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 10%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (40 mg, 0.1 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.4 mL) and 3-cyanophenylboronic acid (31 mg, 0.2 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 3-(3′-amino-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (5 mg, 10%). 1H-NMR (MeOD): 1.69 (m, 2.5H), 2.01 (m, 3H), 2.51 (m, 1H), 2.72 (m, 1H), 3.42 (d, 2H), 3.52 (m, 3H), 3.90 (m, 2H), 4.15 (m, 1.5H), 7.02 (d, 1H), 7.59 (t, 1H), 7.68 (m, 2H), 7.94 (m, 3H).
To a solution of tetrahydro-2H-pyran-4-carboxylic acid (50 g, 385 mmol) in anhydrous methanol (500 mL) was added 4-methylbenzenesulfonic acid hydrate (72.5 g, 385 mmol). The mixture was refluxed for 2 hr. The solvent was removed in vacuo. Ethyl ether and water was added. The organic phase was washed with water and brine, then dried over Na2SO4, filtered and concentrated to give methyl tetrahydro-2H-pyran-4-carboxylate (8.3 g, 75%), which was used in next step without purification.
To a stirred solution of methyl tetrahydro-2H-pyran-4-carboxylate (1 g, 6.95 mmol) in dried THF was added DIBAL-H (7.6 mL, 7 mmol) at −78° C. The mixture was stirred at the same temperature until the reaction was complete. The mixture was quenched with saturated NH4Cl. The mixture was filtrated and the filtrate was extracted with ethyl ether for 3 times. The combined organic layers were dried over Na2SO4. Filtration followed by concentration in vacuo gave tetrahydro-2H-pyran-4-carbaldehyde (450 mg, 50%), which was used in next step without purification.
To a stirred solution of 1-(5-bromo-2-hydroxyphenyl)ethanone (943.9 mg, 4.39 mmol) in EtOH (5.6 mL) and H2O (9.4 mL) was added tetrahydro-2H-pyran-4-carbaldehyde (500 mg, 4.39 mmol) and borax (1.67 g, 4.39 mmol). The mixture was refluxed overnight. Then the mixture was filtered and the filtrate was concentrated in vacuo. The resulting residue was dissolved in CH2Cl2 and filtrated. The filtrate was concentrated in vacuo to give the crude product, which was purified by column chromatography to give 6-bromo-2-(tetrahydro-2H-pyran-4-yl)chroman-4-one (270 mg, 20%). 1H-NMR (CDCl3, 400 MHz): 1.54 (m, 2H), 1.78 (m, 1H), 1.95 (m, 1H), 2.75 (m, 2H), 3.44 (m, 3H), 4.09 (m, 2H), 4.15 (m, 1H), 6.89 (m, 1H), 7.56 (m, 1H), 8.01 (m, 1H).
To a solution of 6-bromo-2-(tetrahydro-2H-pyran-4-yl)chroman-4-one (310 mg, 1. mmol) in anhydrous DCM (7.8 mL) was added TiCl4 (1 M solution in DCM, 2 mL, 2 mmol) dropwise within 15 minutes at room temperature. The reaction mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (0.41 g, 0.49 mL, 2.2 mmol) dropwise. The resulting mixture was stirred for 18 h after the addition. The reaction mixture was poured into ice-water (50 g) and extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give (E)-N-(6-bromo-2-(tetrahydro-2H-pyran-4-yl)chroman-4-ylidene)cyanamide (240 mg, 78%), which was used in next step without further purification.
To a solution of methylhydroxylamine HCl salt (25.08 mg, 0.3 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25% in MeOH (Wt. %), 0.06 mL, 0.27 mmol), followed by (E)-N-(6-bromo-2-(tetrahydro-2H-pyran-4-yl)chroman-4-ylidene)cyanamide (100 mg, 0.3 mmol). After stirring 10 min, the solvent was removed in vacuo. The resulting residue was redissolved in DCM (10 mL), The mixture was filtered and the solvent was removed to give the residue, which was purified by column chromatography to give compound 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 40%).
A mixture of 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.131 mmol), 3-cyanophenylboronic acid (40 mg, 0.222 mmol), Cs2CO3 (2 M, 0.5 mL) and Pd(PPh3)2Cl2 (15 mg) in 1,4-dioxane (3 mL) under Ar was stirred in a microwave reactor at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 3-(3′-amino-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (2.54 mg, 5%). 1H-NMR
(CDCl3): 1.54 (m, 2H), 1.62 (m, 1H), 1.88 (m, 1H), 2.10 (m, 1H), 2.48 (m, 1H), 3.39 (m, 3H), 3.42 (m, 3H), 4.03 (m, 3H), 6.90 (m, 1H), 7.45 (m, 2H), 7.58 (m, 2H), 7.62 (m, 2H).
In a 10 mL flask, 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (30 mg, 0.08 mmol), Pd(PPh3)2Cl2 (15 mg), 3,5-difluorophenylboronic acid (25 mg, 0.16 mg) were dissolved in 1,4-dioxane (4.0 mL), followed by addition of Cs2CO3 (2 N, 1 mL). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give 6-(3,5-difluorophenyl)-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (10 mg, 30%). 1H-NMR (MeOD): 1.62 (m, 2H), 1.96 (m, 3H), 2.70 (m, 1H), 3.30 (s, 3H), 3.38 (m, 4H), 3.83 (m, 2H), 4.12 (m, 2H), 6.84 (m, 1H), 6.96 (m, 1H), 7.18 (m, 2H), 7.64 (m, 1H), 7.86 (d, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (40 mg, 0.1 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.4 mL) and 3-fluorophenylboronic acid (29.3 mg, 0.2 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure product 6-(3-fluorophenyl)-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (5 mg, 10%). 1H-NMR (MeOD): 1.70 (m, 3H), 2.01 (m, 3H), 2.49 (m, 0.5H), 2.71 (m, 1H), 3.32 (d, 3H), 3.43 (m, 1H), 3.53 (m, 1H), 3.91 (dd, 2H), 4.19 (m, 2H), 7.03 (m, 2H), 7.32 (d, 1H), 7.43 (m, 2H), 7.66 (t, 1H), 7.89 (s, 1H).
A mixture of 6-bromo-2-(pyridine-3-yl)chroman-4-one (300 mg, 1 mmol), 3-cyanophenylboronic acid (294 mg, 2 mmol), Cs2CO3 (2 M, 5 mL) and Pd(PPh3)2Cl2 (80 mg) in 1,4-dioxane (10 mL) under Ar was stirred in a microwave reactor at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give 3-(4-oxo-2-(pyridine-3-yl)chroman-6-yl)benzonitrile (110 mg, 34%). 1H-NMR (MeOD): 2.97-3.02 (d, 1H), 3.25-3.33 (m, 1H), 5.74-5.78 (d, 1H), 7.23 (d, 1H), 7.52 (m, 1H), 7.60-7.64 (m, 2H), 7.70 (d, 1H), 7.90-7.95 (m, 2H), 7.99 (s, 1H), 8.07 (d, 1H), 8.15 (s, 1H), 8.57 (d, 1H), 8.75 (s, 1H).
To a solution of 3-(4-oxo-2-(pyridine-3-yl)chroman-6-yl)benzonitrile (70 mg, 0.22 mmol) in anhydrous DCM (3 mL) was added TiCl4 (1 M solution in DCM, 293 mg, 1.54 mmol) dropwise within 15 minutes at room temperature in the absence of light. The resulting mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (164 mg, 0.88 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered.
The filtrate was concentrated to give (E)-N-(6-(3-cyanophenyl)-2-(pyridine-3-yl)chroman-4-ylidene)cyanamide (70 mg, 93%), which was used in next step without further purification.
To a solution of methylhydroxylamine HCl salt (17 mg, 0.2 mmol) in anhydrous MeOH (2 mL) was added NaOMe (25% in MeOH (Wt. %), 0.10 mL, 0.2 mmol), followed by (E)-N-(6-(3-cyanophenyl)-2-(pyridine-3-yl)chroman-4-ylidene)cyanamide (70 mg, 0.2 mmol). After stirring for 10 mins, the solvent was removed in vacuo. The resulting residue was redissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed to give the residue, which was purified by preparative TLC and preparative HPLC to give 3-(3′-amino-2′-methyl-2-(pyridine-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (2.5 mg, 3%). 1H-NMR (MeOD): 2.40-2.47 (t, 1H), 2.92-3.16 (m, 1H), 3.46 (s, 3H), 5.61-5.69 (m, 1H), 7.21 (m, 1H), 7.64-7.67 (m, 1H), 7.75 (d, 1H), 7.81-7.88 (m, 2H), 7.96-8.00 (t, 1H), 8.04-8.10 (t, 2H), 8.40 (m, 1H), 8.43 (m, 1H), 8.75 (s, 1H).
To a solution of aqueous NaOH (0.5 M, 0.2 mol) was slowly added 4-bromophenol (34.4 g, 0.2 mol) at room temperature. After heating to boiling, 3-bromopropanoic acid (30.60 g 0.2 mol) in aqueous NaOH (0.5M, 0.2 mol) was added dropwise to the mixture above. The resulting mixture was then refluxed for 2 h. The mixture was cooled to 0° C. and the pH of the mixture was adjusted to 6-7 with 0.5 N HCl. The resulting mixture was filtered to give a solid cake, which was washed with water and n-pentane and dried to give 3-(4-bromophenoxy)propanoic acid (30 g, 60%). 1H-NMR (CDCl3): 2.72 (m, 2H), 4.90 (s, 1H), 5.01 (d, 1H), 5.50 (s, 1H), 6.73 (m, 1H), 7.21-7.43 (m, 6H), 7.61 (m, 1H).
3-(4-Bromophenoxy)propanoic acid (4.98 g, 20 mmol) was dissolved in PPA (51.1 g, 360 mmol) and the resulting mixture was heated at 110° C. for 4 hour. The mixture was poured into ice-water and extracted with CH2Cl2 (3×15 mL). The combined organic layers were washed with brine (20 mL), dried over Na2SO4, and concentrated in vacuo to give the crude product (4 g, 88%).
To a solution of 6-bromo-7-fluoro-2-phenylchroman-4-one (289.3 mg, 1.28 mmol) in DCM (10 mL) was added TiCl4 (2.6 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (0.63 mL, 2.82 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (50 g). The organic layer was separated and the aqueous layer was extracted with CH2Cl2. The combined organic layer was dried and concentrated to give crude N-(6-bromochroman-4-ylidene)cyanamide (300 mg, 94%).
To a solution of N-methyl-hydroxylamine hydrochloride (101 mg, 1.2 mmol) in MeOH (4 mL) was added MeONa (0.24 mL, 25% (Wt.) in MeOH), followed by N-(6-bromochroman-4-ylidene)cyanamide (300 mg, 1.2 mmol). After stiffing for 10 minutes, the solvent was removed in vacuo. The resulting residue was purified by preparative TLC to give 6-bromo-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (315 mg, 88%).
Pd(PPh3)2Cl2 (7 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with 6-bromo-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (59.4 mg, 0.2 mmol) in 1,4-dioxane (2.0 mL), Cs2CO3 (2 N, 1 mL) and 3-cyanophenylboronic acid (58.8 mg, 0.4 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give 3-(3′-amino-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (6.7 mg, 10%). 1H-NMR (MeOD): 2.31 (m, 1H), 2.62 (m, 1H), 3.39 (m, 3H), 4.32 (m, 1H), 4.46 (m, 1H), 7.00 (d, 1H), 7.58-7.71 (m, 3H), 7.95 (m, 3H).
Pd(PPh3)2Cl2 (5 mg) in a 10 mL flask under Ar was treated sequentially with the 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (40 mg, 0.105 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.2 mL) and 3-isopropylphenylboronic acid (25.8 mg, 144 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give 6-(3-isopropylphenyl)-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (7.5 mg, 18%). 1H NMR (MeOD): 1.31 (d, 6H), 1.68 (m, 2H), 1.92-2.07 (m, 3H), 2.43-2.72 (m, 1H), 2.96 (m, 1H), 3.34 (s, 3H), 3.45-3.58 (m, 2H), 3.83-4.01 (m, 2H), 4.12-4.23 (m, 2H), 6.98 (m, 1H), 7.21 (m, 1H), 7.38 (m, 3H), 7.63 (m, 1H), 7.79 (m, 1H).
To a solution of 6-bromo-2-phenylchroman-4-one (387 mg, 1.28 mmol) in anhydrous DCM (10 mL) was added TiCl4 (1 M solution in DCM, 2.6 mL, 2.6 mmol) dropwise within 15 minutes at room temperature. The resulting mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (525 mg, 2.82 mmol) dropwise. The resulting mixture was stirred for 18 h after the addition. The reaction mixture was poured into ice-water (50 g) and extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (Z)—N-(6-bromo-2-phenylchroman-4-ylidene)cyanamide (400 mg, 96%) which was used in next step without further purification.
To a solution of methylhydroxylamine HCl salt (26 mg, 0.307 mmol) in anhydrous MeOH (10 mL) was added NaOMe (25 wt. % in MeOH, 0.07 mL, 0.276 mmol), followed by (Z)—N-(6-bromo-2-phenylchroman-4-ylidene)cyanamide (100 mg, 0.307 mmol). After stirring for 10 minutes, the solvent was removed in vacuo. The residue was dissolved in DCM (20 mL). The mixture was filtered, and the solvent was removed in vacuo to give 6-bromo-2′methyl-2-phenyl-2′H-spiro(chroman-4,5′-(1,2,4)oxadiazol)-3′-amine (100 mg, 87%), which was used in the next step without further purification.
To a solution of 6-bromo-2′methyl-2-phenyl-2′H-spiro(chroman-4,5′-(1,2,4) oxadiazol)-3′-amine (50 mg, 0.134 mmol), 3-cyano-5-fluorinphenylboronic acid (38 mg, 0.228 mmol) and Cs2CO3 (109 mg, 0.338 mmol) in 1,4-dioxane (6.7 mL) and H2O (0.5 mL) was added PdCl2(PPh3)2 (13.4 mg). After degassing, the mixture was refluxed for 3 h (black precipitate came out at this point of time). The solvent was removed under reduced pressure and the residue was purified by preparative HPLC to give 5-(3′-amino-2′-methyl-2-phenyl-2′H-spiro(chroman-4,5′-(1,2,4)oxadiazole)-6-yl)-2-fluorobenzonitrile (0.65 mg, 1.2%) as a TFA salt. 1H-NMR (MeOD): 2.26 (m, 0.3H), 2.57 (m, 0.7H), 2.72 (m, 1H), 3.31 (m, 3H), 5.26 (m, 1H), 7.00 (m, 1H), 7.34 (m, 4H), 7.45 (m, 2H), 7.61 (s, 1H), 7.94 (d, 3H).
A mixture of 6-bromo-7-fluoro-2-phenylchroman-4-one (318 mg, 0.994 mmol), 2-fluoropyridin-3-ylboronic acid (210 mg, 1.5 mmol), Na2CO3 (318 mg, 2.98 mmol), PPh3 (34 mg) and Pd(PPh3)2Cl2 (59 mg, 0.1 mmol) in toluene/EtOH (v/v=1/1, 10.5 mL) was degassed and stirred at 110° C. for 20 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 7-fluoro-6-(2-fluoropyridin-3-yl)-2-phenylchroman-4-one (78 mg, 23%).
To a solution of 7-fluoro-6-(2-fluoropyridin-3-yl)-2-phenylchroman-4-one (78 mg, 0.23 mmol) in CH2Cl2 (5 mL) under N2 was added TiCl4 (1 M solution in DCM, 1.15 mL, 1.15 mmol) dropwise within 15 minutes at room temperature under dark. After addition, the reaction mixture was stirred for 1 h. To this mixture was added bis-trimethylsilylcarbodiimide (94.3 mg, 0.506 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give 7-fluoro-6-(2-fluoro-pyridin-3-yl)-2-phenyl-chroman-4-ylidene-cyanamide (100 mg, 100%).
To a solution of methylhydroxylamine HCl salt (27 mg, 0.277 mmol) in anhydrous MeOH (3 mL) was added NaOMe (25% in MeOH (Wt. %), 0.10 mL), followed by 7-fluoro-6-(2-fluoro-pyridin-3-yl)-2-phenyl-chroman-4-ylidene-cyanamide (100 mg, 0.277 mmol). After stirring for 10 minutes, the solvent was removed in vacuo. The residue was redissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed to give the residue, which was purified by preparative TLC to give 7-fluoro-6-(2-fluoropyridin-3-yl)-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (4.65 mg, 4%). 1H-NMR (MeOD): 2.21 (m, 1H), 2.34 (m, 1H), 3.03 (s, 3H), 5.46 (m, 1H), 6.73 (m, 1H), 7.32 (m, 4H), 7.49 (m, 3H), 7.91 (m, 1H), 8.28 (m, 1H).
To a solution of 1-(5-bromo-2-hydroxyphenyl)ethanone (50 g, 0.23 mol) in EtOH (285 mL) and H2O (15 mL) was added isonicotinaldehyde (25 g, 0.23 mol) and NaOH (84 g, 0.23 mol). The reaction mixture was stirred overnight. EtOH was added to the mixture and filtered to give a solid residue. The residue was dissolved in water and acidified by 1 M HCl to give a solid. The solid was collected by filtration to give (E)-1-(5-bromo-2-hydroxyphenyl)-3-(pyridin-4-yl)prop-2-en-1-one (30 g, 40%).
To a solution of (E)-1-(5-bromo-2-hydroxyphenyl)-3-(pyridin-4-yl)prop-2-en-1-one (20 g, 63.3 mmol) in EtOH (160 mL) and H2O (480 mL) was added NaOH (2.53 g, 63.3 mmol). The reaction mixture was stirred overnight. The mixture was filtered to give a solid residue. The solid residue was dissolved in EtOAc. The resulting solution was dried over Na2SO4 and concentrated in vacuo to give 6-bromo-2-(pyridin-4-yl)chroman-4-one (10 g, 50%). 1H-NMR (CDCl3): 3.00 (t, 2H), 5.51 (dd, 1H), 7.02 (d, 1H), 7.39 (d, 2H), 7.63 (t, 1H), 8.04 (s, 1H), 8.72 (d, 2H).
To a solution of 6-bromo-2-(pyridin-4-yl)chroman-4-one (1 g, 3.3 mmol) in anhydrous DCM (25 mL) was added TiCl4 (1 M solution in DCM, 6.6 mL, 6.6 mmol) dropwise within 15 min at room temperature. After the addition, the reaction mixture was stirred for 1 h. To this mixture was added bis-trimethylsilylcarbodiimide (1.35 g, 7.26 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition.
The reaction mixture was poured into ice-water (100 g) and extracted with DCM (3×50 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-2-(pyridin-4-yl)chroman-4-ylidene)cyanamide (1 g, 100%), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (76.9 mg, 0.92 mmol) in anhydrous MeOH (11 mL) was added NaOMe (25 w % in MeOH, 0.19 mL, 0.828 mmol), followed by (E)-N-(6-bromo-2-(pyridin-4-yl)chroman-4-ylidene)cyanamide (300 mg, 0.92 mmol), After stirring for 10 min, the solvent was removed in vacuo. The residue was dissolved in DCM (20 mL). The mixture was filtered, and the solvent was removed in vacuo to give a reside, which was purified by preparative TLC to give 6-bromo-2′-methyl-2-(pyridin-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (80 mg, 30%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 6-bromo-2′-methyl-2-(pyridin-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (20 mg, 0.053 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (14.8 mg, 0.1 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 3-(3′-amino-2′-methyl-2-(pyridin-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (3 mg, 10%). 1H-NMR (MeOD): 2.24 (m, 1H), 3.01 (m, 1H), 3.39 (t, 3H), 5.54 (d, 1H), 7.19 (m, 1H), 7.60 (m, 1H), 7.62 (t, 1H), 7.69 (m, 1H), 7.89 (m, 3H), 8.02 (, 2H), 8.70 (s, 2H).
Pd(PPh3)2Cl2 (20 mg) in a 10 mL flask under Ar was treated sequentially with 6-bromo-2-(pyridin-2-yl)chroman-4-one (300 mg, 1 mmol) in [1,4]dioxane (40 mL), Cs2CO3 (2 N, 5 mL) and 3-cyanophenylboronic acid (250 mg, 1 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(4-oxo-2-(pyridin-2-yl)chroman-6-yl)benzonitrile (110 mg, 60%). 1H-NMR (CDCl3): 3.13 (m, 2H), 5.61 (m, 1H), 7.13 (m, 1H), 7.27 (m, 1H), 7.49 (m, 1H), 7.58 (m, 2H), 7.68 (m, 1H), 7.79 (m, 3H), 8.09 (d, 1H), 8.58 (d, 1H).
To a solution of 3-(4-oxo-2-(pyridin-2-yl)chroman-6-yl)benzonitrile (50 mg, 0.15 mmol) in DCM (2 mL) was added TiCl4 (1 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (0.07 mL, 0.31 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (25 g). The organic layer was separated and the aqueous layer was extracted with CH2Cl2. The combined organic layer was dried and concentrated to give crude (Z)—N-(6-(3-cyanophenyl)-2-(pyridin-2-yl)chroman-4-ylidene)cyanamide (100 mg, crude).
To a solution of N-methyl-hydroxylamine hydrochloride (14 mg, 0.14 mmol) in MeOH (4 mL) was added MeONa (0.03 mL, 25% (Wt.) in MeOH), followed (Z)—N-(6-(3-cyanophenyl)-2-(pyridin-2-yl)chroman-4-ylidene)cyanamide (50 mg, crude). After stirring for 10 minutes, the solvent was removed in vacuo to give a residue. The residue was purified by preparative TLC to give 3-(3′-amino-2′-methyl-2-(pyridin-2-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (4.3 mg, 8%). 1H-NMR (MeOD): 2.11 (m, 1H), 2.51 (m, 1H), 3.02 (s, 2H), 3.28 (s, 1H), 4.12 (m, 1H), 5.32 (m, 1H), 6.97 (m, 1H), 7.32 (m, 1H), 7.55 (m, 5H), 7.82 (m, 3H), 8.46 (m, 1H).
To a solution of 1-(5-bromo-2-hydroxyphenyl)ethanone (20 g, 93.4 mmol) in EtOH (114 mL) and H2O (6 mL) was added 4-(trifluoromethoxy)benzaldehyde (17.75 g, 93.4 mmol) and NaOH (33.6 g, 840.6 mmol). The reaction mixture was stirred overnight. Ethoxyethane was added to the mixture and filtered to give a residue. The residue was dissolved in water and acidified by 1 M HCl to give a solid. The solid was collected by filtration to give (E)-1-(5-bromo-2-hydroxyphenyl)-3-(4-(trifluoromethoxy)phenyl)prop-2-en-1-one (30 g, 80%). 1H-NMR (CDCl3): 6.87 (d, 1H), 7.21 (d, 2H), 7.49 (m, 1H), 7.52 (m, 1H), 7.59 (d, 2H), 7.84 (t, 1H), 7.92 (s, 1H).
To a solution of (E)-1-(5-bromo-2-hydroxyphenyl)-3-(4-(trifluoromethoxy)phenyl)prop-2-en-1-one (8 g, 20 mmol) in EtOH (144 mL) and H2O (432 mL) was added NaOH (800 mg, 20 mmol). The reaction mixture was stirred overnight. The mixture was filtered to give a solid residue. The solid residue was dissolved in EtOAc. The resulting solution was dried over Na2SO4 and then concentrated in vacuo to give 6-bromo-2-(4-(trifluoromethoxy)phenyl)chroman-4-one (6 g, 80%). 1H-NMR (CDCl3): 2.91 (d, 1H), 3.04 (m, 1H), 5.49 (dd, 1H), 6.94 (m, 1H), 7.31 (d, 2H), 7.50 (d, 2H), 7.59 (m, 1H), 8.03 (s, 1H).
To a solution of 6-bromo-2-(4-(trifluoromethoxy)phenyl)chroman-4-one (530 mg, 1.37 mmol) in anhydrous DCM (15 mL) was added TiCl4 (1 M solution in DCM, 2.74 mL, 2.74 mmol) dropwise within 15 min at room temperature. After the addition, the reaction mixture was stirred for 1 h. To this mixture was added Bis-trimethylsilylcarbodiimide (561.6 mg, 3 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (80 g) and extracted with DCM (3×50 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-2-(4-(trifluoromethoxy)phenyl)chroman-4-ylidene)cyanamide (540 mg, 90%), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (110 mg, 1.317 mmol) in anhydrous MeOH (15 mL) was added NaOMe (25 w % in MeOH, 0.23 mL, 1.02 mmol), followed by (E)-N-(6-bromo-2-(4-(trifluoromethoxy)phenyl)chroman-4-ylidene)cyanamide (540 mg, 1.32 mmol). After stirring for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (20 mL). The mixture was filtered and the solvent was removed in vacuo, which was purified by preparative TLC to give 50 mg crude product of 6-bromo-2′-methyl-2-(4-(trifluoromethoxy)phenyl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (100 mg, 20%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with 6-bromo-2′-methyl-2-(4-(trifluoromethoxy)phenyl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.11 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.4 mL) and 3-cyanophenylboronic acid (32.4 mg, 0.22 mmol). The mixture was heated in a microwave reactor at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure 3-(3′-amino-2′-methyl-2-(4-(trifluoromethoxy)phenyl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (1.39 mg, 5%). 1H-NMR (MeOD): 2.34 (t, 1H), 2.89 (d, 1H), 5.41 (t, 1H), 7.13 (d, 1H), 7.37 (t, 2H), 7.64 (m, 3H), 7.70 (d, 1H), 7.78 (t, 1H), 7.94 (t, 1H), 8.04 (m, 2H).
A solution of 4-phenoxy-phenol (169 g, 0.9 mol) in pyridine (500 mL) was treated with acetic anhydride (90 mL). The reaction mixture was stirred at room temperature overnight. The mixture was partitioned between DCM and 10% HCl solution, and the resulting mixture was stirred for 1 h. The organic phase was washed with 10% HCl and water until pH=7. The organic layer was dried and the solvent was evaporated to afford acetic acid 4-phenoxy-phenyl ester (200 g, 97%). 1H-NMR (CDCl3): 2.21 (s, 3H), 6.94 (m, 6H), 7.04 (m, 1H), 7.28 (m, 2H).
A mixture of acetic acid 4-phenoxy-phenyl ester (114 g, 0.5 mol) and AlCl3 (133.5 g, 1 mol) was stirred at 120-140° C. for 20-30 minutes. The mixture was cooled to 60-80° C. and ice water was added. The resulting mixture was extracted with EtOAc. The organic layers were washed with brine and dried over Na2SO4. After concentration, the residue was purified by column (25.8 g, 23%). 1H-NMR (CDCl3): 2.57 (s, 3H), 6.96 (m, 3H), 7.07 (m, 1H), 7.21 (m, 1H), 7.31 (m, 2H), 7.40 (m, 1H), 12.05 (s, 1H).
In a bottle 1-(2-hydroxy-5-phenoxy-phenyl)-ethanone (5 g, 21.93 mmol), benzaldehyde (2.33 g, 21.93 mmol), EtOH (96%, 26.3 mL) and NaOH (7.02 g, 175.44 mmol) were combined. The mixture was stirred vigorously for 0.5 h and then filtered. The filtrate was poured into HCl (1 N, 200 mL) and filtered to give a solid. The solid was dried to give 3-(3-chloro-phenyl)-1-(2-hydroxy-5-phenoxy-phenyl)-propenone (5.87 g, 85%). 1H-NMR (CDCl3): 6.95 (m, 2H), 7.07 (m, 2H), 7.23 (m, 1H), 7.34 (m, 2H), 7.42 (m, 3H), 7.53 (m, 1H), 7.64 (m, 3H), 7.95 (m, 1H), 12.62 (s, 1H).
3-(3-Chloro-phenyl)-1-(2-hydroxy-5-phenoxy-phenyl)-propenone (5.85 g, 0.018 mol) was dissolved in H2O (140 mL) and EtOH (46.2 mL) and NaOH (2.74 g, 68 mmol) was added. The mixture was stirred overnight and filtered to give a solid cake. The cake was dissolved in EtOAc and washed with H2O twice. The organic layer was dried and filtered. The filtrate was concentrated to give 6-phenoxy-2-phenyl-chroman-4-one (5.86 g, 100%). 1H-NMR (CDCl3): 2.87 (m, 1H), 3.06 (m, 1H), 5.46 (m, 1H), 6.96 (m, 2H), 7.08 (m, 2H), 7.25 (m, 1H), 7.33 (m, 2H), 7.39 (m, 1H), 7.42 (m, 2H), 7.48 (m, 2H), 7.51 (m, 1H).
To a solution of 6-phenoxy-2-phenylchroman-4-one (316 mg, 1 mmol) in anhydrous DCM (7.8 mL) was added TiCl4 (1 M solution in DCM, 2 mL, 2 mmol) dropwise within 15 minutes at room temperature. After addition, the mixture was stirred for 1 h. To this mixture was added bis-trimethylsilylcarbodiimide (0.41 g, 0.49 mL, 2.2 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (50 g) and extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give (Z)—N-(6-phenoxy-2-phenylchroman-4-ylidene)cyanamide (340 mg, 90%), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (83.6 mg, 1 mmol) in anhydrous MeOH (11 mL) was added NaOMe (25% in MeOH (Wt. %), 0.2 mL, 0.9 mmol), followed by (Z)—N-(6-phenoxy-2-phenylchroman-4-ylidene)cyanamide (340 mg, 1 mmol). After stirring for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (30 mL). The mixture was filter, and the solvent was removed to give the residue, which was purified by column chromatography to give 2′-methyl-6-phenoxy-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (200 mg, 52%). 1H-NMR (CDCl3): 2.41-2.66 (m, 1H), 2.65 (m, 1H), 2.75 (m, 1H), 3.32 (m, 3H), 5.35 (m, 1H), 6.95 (m, 2H), 7.06 (m, 1H), 7.20 (m, 2H), 7.42 (m, 3H), 7.48 (m, 3H), 7.51 (m, 2H).
To a solution of 6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (2 g, 6.8 mmol) in MeOH Selectfluor™ (2.5 g, 7.1 mmol) was added. The suspension was refluxed overnight. Then the solvent was removed in vacuo. CH2Cl2 was added to the resulting residue and insoluble material filtered off. The filtrate was washed with H2O, dried and concentrate in vacuo. The crude product was purified by column chromatography to give 6-bromo-3-fluoro-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (220 mg, 10%). 1H-NMR (CDCl3): 1.72-2.21 (m, 4H), 3.44 (m, 1H), 3.63 (m, 1H), 3.73 (m, 1H), 3.92 (m, 1H), 4.91 (m, 1H), 6.94 (m, 1H), 7.56 (m, 1H), 7.90 (m, 1H).
To a solution of 6-bromo-3-fluoro-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (220 mg, 0.65 mmol) in anhydrous DCM was added TiCl4 (1 M in DCM, 1.4 mL) dropwise within 15 minutes at room temperature. After addition, the mixture was stirred for 1 h. To this mixture was added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (264 mg, 1.42 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered, and the filtrate was concentrated to give crude product, which was used in the next step without further purification.
To a solution MeNHOH.HCl (25 mg, 0.3 mmol) in anhydrous MeOH was added NaOMe (14 mg, 25 w % in MeOH), followed by (Z)—N-(6-bromo-3-fluoro-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (100 mg, 0.3 mmol). After stirring for 10 minutes, the solvent was removed in vacuo. The residue was dissolved in DCM and the resulting solution was filtered. The filtrate was collected and the solvent was removed to give the crude product, which was purified by column chromatography to give product 109i (50 mg, 44%).
Pd(PPh3)2Cl2 (14 mg) in a 10 mL flask under Ar was treated sequentially with compound 109i (50 mg, 0.13 mmol) in 1,4-dioxane (3 mL), Cs2CO3 (2 N, 0.162 mL) and 3-cyanophenylboronic acid (32.6 mg, 0.22 mmol). The mixture was heated at 120° C. for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC followed by preparative HPLC to give pure Compound 109 (10.2 mg, 19%). 1H-NMR (MeOD): 1.51-2.10 (m, 2H), 2.16 (m, 2H), 3.41 (d, 3H), 3.48-3.90 (m, 3H), 3.96 (m, 1H), 5.24 (m, 1H), 7.13 (m, 1H), 7.64 (m, 1H), 7.71 (m, 1H), 7.82 (m, 1H), 7.97 (m, 1H), 8.09 (m, 2H).
Pd(PPh3)2Cl2 (6 mg) under Ar was treated sequentially with the amine 110i (20 mg, 0.062 mmol) in 1,4-dioxane (1.5 mL), Cs2CO3 (2 N, 0.25 mL) and 3-chlorophenylboronic acid (16 mg, 0.11 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give Compound 110 (2.05 mg, 8%). 1H-NMR (MeOD): 1.45-1.94 (m, 3H), 2.04 (m, 2H), 2.89 (m, 1H), 3.37 (m, 3H), 3.61 (m, 2H), 3.82 (m, 2H), 7.02 (m, 1H), 7.34 (m, 2H), 7.51 (m, 1H), 7.18 (m, 2H), 7.88 (m, 1H).
4-Bromophenol (28.4 g, 0.165 mol) and DMAP (0.17 g, 1.4 mmol) were dissolved in dichloromethane (110 mL). The solution was cooled in an ice-bath and triethylamine (24 mL) was added portionwise. Propionyl chloride (16 g, 0.17 mmol) was then added dropwise and the resulting mixture was stirred at room temperature for 2 hrs. The mixture was washed with water, followed by brine, dried and concentrated to give 4-bromophenyl propionate, which was used in the next step without further purification (34 g, 92%). 1H NMR (MeOD, 400 MHz): 1.12-1.24 (m, 3H), 2.57-2.63 (m, 2H), 7.02-7.06 (m, 2H), 7.51-7.55 (m, 2H).
4-Bromophenyl propionate (34 g, 0.15 mmol) and aluminum chloride (44 g, 0.3 mmol) were heated together at 100° C. for 30 mins. The solution became dark and hydrogen chloride gas was evolved. After cooling, the reaction mixture was carefully poured into ice water, and the resulting mixture was extracted with dichloromethane. The organic layer was washed with brine, dried and concentrated to give the residue, which was purified by column chromatography to give 1-(5-bromo-2-hydroxyphenyl)propan-1-one. (20 g, 59%) 1H NMR (CDCl3, 400 MHz): 1.24 (t, 3H), 2.98-3.04 (m, 2H), 6.88 (d, 1H), 7.52 (t, 1H), 7.76 (s, 1H).
A mixture of 1-(5-bromo-2-hydroxyphenyl)propan-1-one (5.7 g, 25 mol), dihydro-2H-pyran-3(4H)-one (5 g, 50 mmol) and pyrrolidine (3.4 g, 48 mmol) in methanol (80 mL) was stirred overnight. The reaction mixture was removed in vacuo, and H2O was added. The resulting solution was extracted with ethyl acetate. The ethyl acetate solution was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-3-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (1.2 g, 16%). 1HNMR (CDCl3): 1.16-1.27 (m, 3H), 1.51-1.57 (m, 1H), 1.66-1.73 (m, 1H), 1.91-2.08 (m, 2H), 2.59-2.69 (m, 1H), 3.46-3.56 (m, 2H), 3.88-3.98 (m, 2H), 6.97 (m, 1H), 7.58 (m, 1H), 7.95 (s, 1H).
A solution of 6-bromo-3-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (200 mg, 0.65 mmol) and TiCl4 (864 mg, 4.55 mmol) in anhydrous DCM (8 mL) was heated at 50 under microwave for 5 mins. Then bis-trimethylsilylcarbodiimide (360 mg, 1.95 mmol) was added and the mixture was heated at 65° C. for another 1 hr. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered and concentrated to give (E)-N-(6-bromo-3-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (300 mg, crude), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (84 mg, 1 mmol) in anhydrous MeOH (10 mL) was added NaOMe (25% in MeOH (Wt. %), 0.3 mL, 1 mmol), followed by (E)-N-(6-bromo-3-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (346 mg, 1 mmol). After stirring for 10 mins, the solvent was removed in vacuo. The residue was redissolved in DCM (10 mL). The mixture was filtered and concentrated to give the residue, which was purified by preparative TLC to give Compound 111i (100 mg, 25%). 1H-NMR (CDCl3): 1.02-1.11 (m, 3H), 1.89-2.17 (m, 2H), 1.17-2.24 (m, 2H), 3.05 (s, 3H), 3.63-3.68 (m, 1H), 3.95-4.33 (m, 2H), 4.25-4.40 (s, 2H), 6.79-6.87 (m, 1H), 7.30-7.39 (m, 1H), 7.47 (s, 1H).
A mixture of Compound 111i (69 mg, 0.18 mmol), 3-cyanophenylboronic acid (53 mg, 0.36 mmol), Cs2CO3 (2 M, 1 mL) and Pd(PPh3)2Cl2 (30 mg) in 1,4-dioxane (5 mL) under Ar was stirred under microwave at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give Compound 111 (10 mg, 14%). 1H-NMR (MeOD): 0.99-1.30 (m, 3H), 1.45-2.00 (m, 2H), 2.00-2.70 (m, 2H), 3.38 (m, 3H), 3.40-3.60 (m, 1H), 3.61-3.65 (m, 2H), 3.80-4.10 (m, 2H), 7.07-7.17 (m, 1H), 7.59-7.79 (m, 3H), 7.90-8.01 (m, 3H).
To a solution of tetrahydrofuran-3-ol (29.7 g, 0.337 mol) in dry DCM (1 L) was added 3 Å molecule sieves (35 g) and PCC (110.2 g, 0.515 mol). The mixture was stirred at room temperature overnight. When the reaction was completed, the mixture was filtered through celite and the filtrate was dried over Na2SO4 and concentrated in vacuo to give the crude product, which was distilled in vacuo to give product (7.07 g, 29%). 1H-NMR (MeOD): 2.45 (m, 2H), 3.8 (m, 2H), 4.2 (m, 2H).
A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (4.97 g, 23.23 mmol), dihydrofuran-3(2H)-one (3 g, 34.87 mmol) and pyrrolidine (2.48 g, 34.87 mmol) in toluene (60 mL) was refluxed overnight. After cooling, the mixture was treated with water and acidified with concentrated HCl to pH around 1. The resulting solution was extracted with ethyl acetate and washed with brine. The combined organic layers were concentrated and the residue was purified by column to give 6-bromo-4′,5′-dihydro-2′H-spiro[chroman-2,3′-furan]-4-one (1.7 g, 30%). 1H-NMR (CDCl3): 1.9 (m, 1H), 2.3 (m, 1H), 2.8 (m, 2H), 3.65 (m, 1H), 3.9 (m, 1H), 4.0 (m, 2H), 6.8 (m, 1H), 7.5 (m, 1H), 7.9 (m, 1H).
To a solution of 6-bromo-4′,5′-dihydro-2′H-spiro[chroman-2,3′-furan]-4-one (206 mg, 0.731 mmol) in anhydrous DCM (6 mL) was added TiCl4 (281 mg, 1.48 mmol) dropwise within 15 minutes at room temperature and resulting mixture was stirred for 1 h. To this mixture was added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (300 mg, 1.61 mmol). The resulting mixture was stirred for another 18 hours after addition. The reaction mixture was poured into water-ice and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered and concentrated to give crude product (225 mg, 100%), which was used in the next step without further purification.
To a solution of N-methylhydroxylamine hydrochloride (62 mg, 0.735 mmol) in anhydrous MeOH (8.6 mL) was added NaOMe (25%, 0.143 mL), followed by (E)-N-(6-bromo-4′,5′-dihydro-2′H-spiro[chroman-2,3′-furan]-4-ylidene)cyanamide (225 mg, 0.735 mmol). After stirring for 10 min, the solvent was removed in vacuo and the residue was dissolved in DCM. The resulting solution was filtered, and solvent was removed in vacuo to give compound 113i (52 mg, 20%). 1H-NMR (CDCl3): 2.0 (m, 2H), 2.25 (m, 2H), 3.0 (d, 3H), 3.65 (m, 1H), 3.8 (m, 1H), 3.9 (m, 2H), 6.65 (d, 1H), 7.25 (d, 2H), 7.45 (d, 1H).
Pd(PPh3)2Cl2 (5 mg, 0.005 mmol) in a 10 mL flask under Ar was treated sequentially with compound 113i (30 mg, 0.085 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2
N, 0.3 mL) and 3-cyanophenylboronic acid (30.94 mg, 0.17 mmol). The mixture was heated at 120° C. under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure isomer 113a (5.52 mg, 17%) and 113b (2.81 mg, 9%). 1H-NMR (MeOD): 2.15 (m, 1H), 2.35 (m, 1H), 2.55 (m, 1H), 2.8 (m, 1H), 3.35 (m, 3H), 3.8 (m 1H), 3.95 (m, 2H), 4.1 (m, 1H), 7.0 (m, 1H), 7.55 (m, 1H), 7.7 (m, 2H), 7.9 (m, 1H), 8.0 (m, 2H) (113a). 1H-NMR (MeOD): 2.15 (m, 2H), 2.4 (m, 1H), 2.8 (m, 1H), 3.35 (m, 3H), 3.8 (m, 1H), 3.95 (m, 2H), 4.05 (m, 1H), 7.0 (m, 1H), 7.6 (m, 1H), 7.7 (m, 2H), 7.9 (m, 1H), 8.0 (m, 2H) (113b).
An oil slurry of NaH (68 g of a 60% suspension) was rinsed with petroleum ether and added to THF (1600 mL). The prop-2-en-1-ol (1.6 mol, 108.92 mL) was then added and the resulting solution was stirred for 2 hours. Chloromethyl-oxirane (639.12 mL) was added and the solution was stirred for 16 hours at room temperature followed by refluxation for 4 h. After the excess base was neutralized with 30% methanolic H2SO4, the solution was filtered, concentrated under reduced pressure and distilled under vacuo to give (Z)-2,3,4,5-tetrahydrooxepin-3-ol as colorless oil.
1.3 M sBuLi in hexane (1.3 M, 38.5 mL) was added dropwise to a solution of allyl glycidyl ether 114i (0.05 mol, 5.93 mL) and HMPT (26 mL) in anhydrous THF (260 mL) at −78° C. under argon. After stirring for 30 minutes at the same temperature, the reaction was quenched with phosphate buffer (pH=7.0, 30 mL). The reaction mixture was saturated with solid NaCl and extracted with ethyl acetate (6×30 mL). The combined organic layers were dried over anhydrous Na2SO4 and concentrated under reduced pressure below 25. The resulting mixture was separated by flash chromatography on silica gel (PE:EA=7:1-5:1) to give (Z)-2,3,4,5-tetrahydrooxepin-3-ol (925 mg, yield 16%). 1H-NMR (CDCl3/400M): δ 6.32-6.30 (m, 1H), 4.82-4.78 (m, 1H), 4.04-3.94 (m, 2H), 3.93-3.88 (m, 1H), 2.28-2.15 (m, 1H), 2.14-2.05 (m, 1H), 2.04-1.95 (m, 1H), 1.89 (br, 1H, OH), 1.76-1.68 (m, 1H).
To a solution of (Z-2,3,4,5-tetrahydrooxepin-3-ol (114ii) (6.9 mmol, 786 mg) in MeOH (7.86 mL), was added Pd(OH)2 (78.6 mg) at room temperature under protection of H2. The reaction mixture was stirred at room temperature for 4 hours. TLC showed that the reaction was completed. The reaction mixture was filtered through celite and the filtrate was concentrated to give oxepan-3-ol (730 mg, yield 91%). 1H-NMR (CDCl3/400M): δ 3.89-3.85 (m, 1H), 3.81-3.73 (m, 1H), 3.72-3.62 (m, 3H), 1.85-1.75 (m, 3H), 1.74-1.62 (m, 2H), 1.60-1.52 (m, 1H).
PCC (9.4 mmol, 2.02 g) was added to a solution of oxepan-3-ol (114iii) (6.27 mmol, 727 mg) in 18.8 mL CH2Cl2. The resulting mixture was stirred at room temperature overnight. Upon completion, the reaction mixture was filtered through silica and the filtrate was concentrated to give oxepan-3-one (290 mg, yield 41%). 1H-NMR (CDCl3/400M): δ 4.07 (s, 2H), 3.80-3.78 (m, 2H), 3.70-3.67 (m, 2H), 1.90-1.85 (m, 2H), 1.77-1.72 (m, 2H).
A mixture of 1-(5-bromo-2-hydroxyphenyl)ethanone (0.698 mmol, 150 mg) and oxepan-3-one (1.395 mmol, 159.1 mg) was added pyrrolidine (1.33 mmol, 0.1143 mL) in MeOH (2.85 mL). The reaction mixture was refluxed overnight. The mixture was concentrated in vacuo to give the residue, which was added water and HCl (36%) until pH=1. The resulting mixture was extracted with EtOAc and the organic layer was concentrated to give the crude product, which was purified by preparative TLC (PE:EA=3:1) to give compound 114v (63 mg, yield 29%). 1H-NMR (CDCl3/400M): δ 7.94 (d, 1H, J=2.8 Hz), 7.56-7.53 (m, 1H), 6.90 (d, 1H, J=8.8 Hz), 4.00 (d, 1H, J=16 Hz), 3.91-3.82 (m, 1H), 3.75-3.67 (m, 1H), 3.64 (d, 1H, J=14 Hz), 2.79-2.65 (m, 2H), 2.09-2.00 (m, 1H), 1.92-1.68 (m, 4H), 1.55-1.42 (m, 1H).
To a solution of compound 114v (223 mg, 0.72 mmol) in anhydrous DCM (5.6 mL) was added TiCl4 (1 M solution in DCM, 2.87 mL, 2.87 mmol) dropwise within 15 minutes at room temperature and the resulting mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (400 mg, 0.48 mL, 2.15 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (20 g) and extracted with DCM (3×20 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give compound 114vi as light brown solid (168 mg), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (42 mg, 0.50 mmol) in anhydrous MeOH (5.9 mL) was added NaOMe (25 w % in MeOH, 98.5 uL, 0.45 mmol), followed by cyanamide 114vi (168 mg, 0.50 mmol), After stirring for 1 hour, the solvent was removed in vacuo. The resulting residue was redissolved in DCM (15 mL). The mixture was filtered, and the solvent was removed in vacuo to give the crude product, which was purified by preparative TLC (CH2Cl2: MeOH 12:1) to give the pure product 114vii (114 mg, 59%).
Pd(PPh3)2Cl2 (18.4 mg) in a 10 mL tube under Ar was treated sequentially with the compound 114vii (50 mg, 0.131 mmol) in 1,4-dioxane (5.0 mL), Cs2CO3 (2 N, 0.73 mL) and 3-cyanophenylboronic acid (38.5 mg, 0.262 mmol). The mixture was heated under microwave at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC (CH2Cl2: MeOH 10:1) and preparative HPLC to give the target compound Compound 114. 1H-NMR (MeOD/400M): δ 7.99-7.97 (m, 1H), 7.95-7.87 (m, 2H), 7.72-7.68 (m, 1H), 7.67-7.62 (m, 1H), 7.61-7.55 (m, 1H), 7.15-6.98 (m, 1H), 3.92-3.85 (m, 2H), 3.82-3.65 (m, 2H), 3.41-3.35 (m, 3H), 3.05-2.88 (m, 1H), 2.15-2.05 (m, 1H), 2.04-2.01 (m, 1H), 2.00-1.95 (m, 1H), 1.92-1.71 (m, 3H), 1.68-1.48 (m, 1H).
A mixture of 6-bromo-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-4-one (300 mg, 1 mmol), 3-cyanophenylboronic acid (298 mg, 2 mmol), Cs2CO3 (2 M, 4 mL) and Pd(PPh3)2Cl2 (80 mg) in 1,4-dioxane (10 mL) under Ar was stirred under microwave at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give 3-(4-oxo-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-6-yl)benzonitrile (140 mg, 43%). 1H-NMR (CDCl3): 1.81-1.85 (m, 2H), 2.00-2.04 (d, 2H), 2.80 (s, 2H), 3.78-3.87 (m, 4H), 7.14 (d, 1H), 7.52-7.56 (t, 1H), 7.61-7.64 (d, 1H), 7.71-7.74 (d, 1H), 7.78 (d, 1H), 7.80 (s, 1H), 8.07 (s, 1H).
A solution of 3-(4-oxo-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-6-yl)benzonitrile (170 mg, 0.53 mmol) and TiCl4 (403 mg, 2.12 mmol) in anhydrous DCM (5 mL) was heated at 50 under microwave for 5 mins. Then bis-trimethylsilylcarbodiimide (198 mg, 1.06 mmol) was added and the mixture was heated at 60 for another 30 mins. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered and concentrated to give (Z)—N-(6-(3-cyanophenyl)-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-4-ylidene)cyanamide (147 mg, crude), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (36 mg, 0.43 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25% in MeOH (Wt. %), 0.10 mL, 0.39 mmol), followed by (Z)—N-(6-(3-cyanophenyl)-2′,3′,5′,6′-tetrahydrospiro[chroman-2,4′-pyran]-4-ylidene)cyanamide (147 mg, 0.43 mmol). After stirred for 10 mins, the solvent was removed in vacuo. The residue was redissolved in DCM (5 mL). The mixture was filtered and concentrated to give the residue, which was purified by preparative TLC to give Compound 115 (39.7 mg, 24%). 1H-NMR (CDCl3): 1.79-1.90 (m, 3H), 2.03-2.07 (d, 1H), 2.24 (d, 1H), 2.33 (d, 1H), 3.09 (s, 3H) 3.73-3.82 (m, 3H), 3.91-3.97 (m, 1H), 6.97 (d, 1H), 7.41-7.43 (d, 1H), 7.47-7.51 (t, 1H), 7.56-7.58 (m, 2H), 7.74-7.81 (m, 2H).
To a solution of tetrahydro-pyran-4-one (15 g, 0.15 mol) in Et2O (90 mL) was added dropwise a solution of CH2N2 (1 M in Et2O, 300 mL) at 0° C. After addition, MeOH (75 mL) was added dropwise. The reaction mixture was allowed to warm to room temperature and stir for 2 hours. The remaining diazomethane was destroyed with a few drops of acetic acid. The solvent was removed under reduced pressure to give oxepan-4-one, which was used in the next step directly without purification. 1H-NMR (CDCl3): 1.79 (m, 2H), 2.61 (m, 4H), 3.81 (m, 4H).
A mixture of oxepan-4-one (10 g, 87.7 mmol), 1-(5-bromo-2-hydroxy-phenyl)-ethanone (13 g, 58.5 mmol) and pyrrolidine (6.2 g, 87.7 mmol) in MeOH (150 mL) was refluxed overnight. The solvent was removed in vacuo. The residue was diluted with water, acidified with con. HCl to pH=1. The solution was extracted with EtOAc, washed with brine, and concentrated. The residue was purified by preparative HPLC to give compound 116i (220 mg, 1%). 1H-NMR (CDCl3): 1.52 (m, 1H), 1.84 (m, 2H), 1.98 (m, 1H), 2.13 (m, 2H), 2.70 (m, 2H), 3.65 (m, 1H), 3.74 (m, 3H), 6.81 (d, 1H), 7.49 (m, 1H), 7.90 (m, 1H).
To a solution of compound 116i (200 mg, 0.645 mmol) in anhydrous DCM (7 mL) was added TiCl4 (1 M solution in DCM, 1.29 mL, 1.29 mmol) dropwise within 15 min at room temperature. The mixture was stirred another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (264 mg, 1.42 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give compound 116ii, which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (38 mg, 0.45 mmol) in anhydrous MeOH (6 mL) was added NaOMe (25 w % in MeOH, 0.09 mL, 0.42 mmol), followed by compound 116ii (155 mg, 0.45 mmol). After stiffing 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM. The mixture was filtered, and the solvent was removed in vacuo to give crude product of compound 116iii, which was purified by preparative TLC (60 mg, 34%).
Pd(PPh3)2Cl2 (8 mg) in a 10 mL of tube under Ar2 was treated sequentially with compound 116iii (30 mg, 0.0787 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (23 mg, 0.157 mmol). The mixture was heated at 120° C. in a microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure Compound 116 (3 mg, 10%). 1H-NMR (MeOD): 1.71 (m, 1H), 2.05 (m, 4H), 2.20 (m, 3H), 3.01 (m, 1H), 3.38 (m, 3H), 3.71 (m, 2H), 3.81 (m, 2H), 7.06 (m, 0.7H), 7.20 (m, 0.3H), 7.64 (m, 1H), 7.72 (m, 1H), 7.97 (m, 3H), 8.30 (m, 0.3H).
To a solution of 6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (379 mg, 1.28 mmol) in anhydrous DCM (10 mL) was added TiCl4 (1 M solution in DCM, 2.6 mL, 2.6 mmol) dropwise within 15 minutes at room temperature. The mixture was stirred another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (0.525 g, 0.63 mL, 2.82 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (50 g) and extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give (E)-N-(6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylide-ne)cyanamide (350 mg, 90%), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (62.7 mg, 0.75 mmol) in anhydrous MeOH (8 mL) was added NaOMe (25% in MeOH (Wt. %), 0.15 mL, 0.675 mmol), followed by (E)-N-(6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (240 mg, 0.75 mmol). After stiffing for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (10 mL). The mixture was filtered, and the solvent was removed to give the residue, which was purified by column chromatography to give compound 117i (140 mg, 50%).
A mixture of compound 117i (50 mg, 0.157 mmol), 3-cyanophenylboronic acid (40 mg, 0.266 mmol), Cs2CO3 (2 M, 0.5 mL) and Pd(PPh3)2Cl2 (15 mg) in 1,4-dioxane (3 mL) under Ar was stirred in microwave at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and
HPLC to give compound 2 (15 mg, 20%). 1H-NMR (MeOD): 1.61 (m, 1H), 1.78 (m, 2H), 2.11 (m, 2H), 2.93 (m, 1H), 3.37 (m, 3H), 3.64 (m, 2H), 3.75 (m, 2H), 7.09 (m, 1H), 7.67 (m, 1H), 7.75 (m, 2H), 7.97 (m, 3H).
To a solution of 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (379 mg, 1.28 mmol) in anhydrous DCM (10 mL) was added TiCl4 (1 M solution in DCM, 2.6 mL, 2.6 mmol) dropwise within 15 min at rt. The mixture was stirred for another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (0.525 g, 0.63 mL, 2.82 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (50 g) and extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give N-(6-bromospiro[chroman-2,1′-cyclohexane]-4-ylidene)cyanamide as a light brown solid (410 mg), which was used in the next step without further purification. MS ESI+ve m/z 319 (M+H)+.
To a solution of methylhydroxylamine HCl salt (107 mg, 1.28 mmol) in anhydrous MeOH (15 mL) was added NaOMe (25 w % in MeOH, 0.25 mL, 1.15 mmol), followed by N-(6-bromospiro[chroman-2,1′-cyclohexane]-4-ylidene)cyanamide (410 mg, 1.28 mmol). After stirring for 10 min, the solvent was removed in vacuo. The resulting residue was redissolved in DCM (20 mL). The mixture was filter, and the solvent was removed in vacuo to give 515 mg crude product of 6-bromo-2″-methylspiro[spiro(chroman-2,1′-cyclohexane)-4,5″-[1,2,4]oxadiazolidin]-3″-imine, which is used for next step without further purification. MS ESI+ve m/z 366 (M+H)+.
To a solution of 6-bromo-2″-methylspiro[spiro(chroman-2,1′-cyclohexane)-4,5″-[1,2,4]oxadiazolidin]-3″-imine (77 mg, 0.2 mmol), 3-cyanophenylboronic acid (62 mg, 0.34 mmol), and Cs2CO3 (163 mg, 0.5 mmol) in 1,4-dioxane (10 mL) and H2O (0.5 mL) in a 25 mL round-bottom flask equipped with a condenser was added PdCl2(PPh3)2 (20 mg).
After degassing by vacuum and purge with N2, the mixture was refluxed for 3 h (a black precipitate comes out at this time). The solvent was removed under reduced pressure and the residue was purified by preparative HPLC to give 3-(3″-imino-2″-methylspiro[spiro(chroman-2,1′-cyclohexane)-4,5″-[1,2,4]oxadiazolidine]-6-yl)benzonitrile (18 mg) as a TFA salt. MS ESI+ve m/z 389 (M+H)+. 1H NMR (400 MHz, CD3OD): 8.29-7.02 (m, 12H), 3.38 and 3.34 (s and s, 3H), 2.86 (m, 1H), 2.12-1.40 (m, 11H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube under Ar was treated sequentially with compound 117i (50 mg, 0.136 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.4 mL) and 3-fluorophenylboronic acid (38.4 mg, 0.272 mmol). The mixture was heated under microwave at 120° C. for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure Compound 119 (13 mg, 25%). 1H-NMR (MeOD): 1.61 (m, 1H), 1.92 (m, 2H), 2.13 (m, 2H), 2.69 (t, 1H), 3.32 (d, 3H), 3.61 (m, 2H), 3.84 (m, 2H), 7.02 (m, 2H), 7.33 (d, 1H), 7.42 (m, 2H), 7.62 (d, 1H), 7.79 (d, 1H).
To a solution of 6-bromo-3′-ethylspiro[chroman-2,1′-cyclopentan]-4-one (226 mg, 0.73 mmol) in anhydrous DCM (5.7 mL) was added TiCl4 (1 M solution in DCM, 1.5 mL, 1.49 mmol) dropwise within 15 min at room temperature. The mixture was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (300 mg, 0.36 mL, 1.61 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (20 g) and extracted with DCM (3×20 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-3′-ethylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide as light brown solid (225 mg), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (60 mg, 0.72 mmol) in anhydrous MeOH (8.5 mL) was added NaOMe (25 w % in MeOH, 0.14 mL, 0.65 mmol), followed by (E)-N-(6-bromo-3′-ethylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (225 mg, 0.72 mmol). After stiffing for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (15 mL). The mixture was filter, and the solvent was removed in vacuo to give the crude product, which was purified by preparative TLC (CH2Cl2: MeOH 12:1) to give the pure product 120i (174 mg, 63%). 1H NMR (CDCl3): 7.50 (s, 1H), 7.27 (d, 1H), 6.67 (d, 1H), 3.10 (s, s, 3H), 2.42-2.23 (m, 2H), 2.22-2.05 (m, 2H), 2.04-1.92 (m, 2H), 1.90-1.65 (m, 2H), 1.49-1.39 (m, 1H), 1.35-1.22 (m, 2H), 0.92-0.79 (m, 3H).
Pd(PPh3)2Cl2 (18.5 mg) in a 10 mL tube under Ar was treated sequentially with the compound 120i (50 mg, 0.13 mmol) in 1,4-dioxane (4.9 mL), Cs2CO3 (2 N, 0.74 mL) and 3-cyanophenylboronic acid (39 mg, 0.26 mmol). The mixture was heated under microwave at 120° C. for 45 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC (PE:EA 1:1.5) and then by preparative HPLC to give Compound 120 (2.44 mg, 5%). 1H NMR (MeOD/400M): δ 7.99 (s, 1H), 7.95-7.92 (m, 2H), 7.71-7.64 (m, 2H), 7.62-7.60 (m, 1H), 7.00-6.96 (m, 1H), 3.39 (s, s, 3H), 2.78-2.67 (m, 1H), 2.45-2.33 (m, 1H), 2.31-2.19 (m, 1H), 2.18-2.02 (m, 3H), 2.01-1.87 (m, 2H), 1.48-1.31 (m, 3H), 1.01-0.89 (m, 3H).
To a solution of cyclopent-2-enone (1.5 mL, 18.27 mmol), CuBr—SMe2 (188 mg, 0.91 mmol), chlorotrimethylsilane (4.59 mL, 36.54 mmol) and HMPA (6.55 g, 36.54 mmol) in THF (30 mL) was added isopropylmagnesium bromide (36.54 mL, 1 M in THF) at −70° C. After stirring for 1 h at −70° C., the reaction mixture was quenched with HCl (10%). The mixture was extracted with Et2O. The organic layer was washed with aqueous NaHCO3 and brine. After dried over Na2SO4, the organic layer was concentrated to give 3-isopropylcyclopentanone (4 g, 100%).
A mixture of 3-isopropylcyclopentanone (0.5 g, 3.962 mmol), 1-(5-bromo-2-hydroxyphenyl)ethanone (0.424 g, 1.98 mmol) and pyrrolidine (0.143 g, 1.98 mmol) in MeOH (25 mL) was refluxed overnight. The solvent was removed in vacuo to give crude 6-bromo-3′-isopropylspiro[chroman-2,1′-cyclopentan]-4-one (500 mg, 79%). 1H-NMR (CDCl3): 0.78 (m, 3H), 0.82 (m, 3H), 1.34 (m, 1H), 1.58 (m, 3H), 1.75 (m, 1H), 1.91 (m, 2H), 2.08 (m, 1HO, 2.73 (s, 2H), 6.74 (m, 1H), 7.44 (m, 1H), 7.89 (d, 1H).
To a solution of 6-bromo-3′-isopropylspiro[chroman-2,1′-cyclopentan]-4-one (250 mg, 0.776 mmol) in DCM (10 mL) was added TiCl4 (1.55 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (0.38 mL, 1.707 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (25 g). The aqueous layer was extracted with CH2Cl2, which was combined with the organic layer. The organic layer was dried and concentrated to give crude N-(6-bromo-3′-isopropylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (250 mg, 93%). 1H-NMR (CDCl3): 0.82 (m, 6H), 1.36 (m, 2H), 1.69 (m, 3H), 1.96 (m, 3H), 3.10 (d, 2H), 6.75 (m, 1H), 7.52 (m, 1H), 8.04 (d, 1H).
To a solution of N-methyl-hydroxylamine hydrochloride (72 mg, 0.723 mmol) in MeOH (15 mL) was added MeONa (0.154 mL, 25% (Wt.) in MeOH), followed by N-(6-bromo-3′-isopropylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (250 mg, 0.723 mmol). After stirred for 10 minutes, the solvent was removed in vacuo. The residue was purified by preparative TLC to give compound 121i (148 mg, 52%). 1H-NMR (CDCl3): 0.82 (m, 6H), 1.26 (m, 3H), 1.93 (m, 5H), 2.27 (m, 2H), 3.04 (m, 3H), 6.62 (m, 1H), 7.22 (m, 1H), 7.42 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL flask under Ar was treated sequentially with compound 121i (50 mg, 0.127 mmol) in 1,4-dioxane (3 mL), Cs2CO3 (2 N, 0.16 mL) and 3-cyanophenylboronic acid (33 mg, 0.216 mmol). The mixture was heated at 120° C. under Ar in a microwave reactor for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give Compound 121 (25.43 mg, 48%). 1H-NMR (MeOD): 0.91 (m, 6H), 1.42 (m, 2H), 1.53-1.98 (m, 3H), 1.99-2.27 (m, 3H), 2.38 (m, 1H), 2.71 (m, 0.8H), 3.01 (m, 0.3H) 3.38 (m, 3H), 7.02 (m, 1H), 7.67 (m, 3H), 7.96 (m, 2.8H), 8.30 (m, 0.2H).
Pd(PPh3)2Cl2 (60 mg) in a 40 mL tube under Ar was treated sequentially with 6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (600 mg, 2.01 mmol) in THF (20 mL*3), CuI (600 mg) and cyclohexylzinc(II) bromide (8.1 mL, 4.02 mmol). The mixture was heated under microwave at 160° C. for 10 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by column chromatography to give 6-cyclohexyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (200 mg, 30%). 1H-NMR (CDCl3): 1.31 (t, 4H), 1.48 (m, 1H), 1.62 (m, 5H), 1.76 (d, 4H), 1.89 (m, 1H), 2.06 (d, 1H), 2.49 (s, 1H), 2.61 (m, 2H), 3.49 (m, 2H), 3.79 (m, 2H), 6.88 (d, 1H), 7.29 (d, 2H), 7.61 (s, 1H).
To a solution of 6-cyclohexyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (240 mg, 0.804 mmol) in anhydrous DCM (10 mL) was added TiCl4 (1 M solution in DCM, 608.6 mg, 3.2 mmol) dropwise within 15 min at room temperature. The mixture was stirred for 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (380.6 mg, 3.12 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (100 g) and extracted with DCM (3×50 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-cyclohexyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (20 mg, 10%), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (5.16 mg, 0.06 mmol) in anhydrous MeOH (10 mL) was added NaOMe (25 w % in MeOH, 0.08 mL), followed by (E)-N-(6-cyclohexyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (20 mg, 0.06 mmol), After stirring for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (20 mL), the mixture was filtered and the solvent was removed in vacuo, which was purified by preparative TLC to give Compound 122 (5.24 mg, 30%). 1H-NMR (MeOD): 1.24 (m, 2H), 1.37 (m, 4H), 1.52 (m, 1H), 1.72 (d, 1.5H), 1.79 (d, 5H), 1.88 (t, 1H), 2.04 (m, 1H), 2.42 (m, 1H), 3.01 (d, 3H), 3.50 (m, 2H), 3.69 (d, 0.5H), 3.74 (m, 1H), 3.90 (d, 0.5H), 6.71 (d, 1H), 7.04 (d, 1H), 7.19 (d, 1H).
Pd(PPh3)2Cl2 (15 mg) in a 10 mL of flask under Ar2 was treated sequentially with the amine 117i (40 mg, 0.13 mmol) in 1,4-dioxane (2.3 mL), Cs2CO3 (2 N, 0.5 mL) and 3-ethoxy-benzonitrile (31 mg, 0.19 mmol). The mixture was heated at 120° C. under Ar under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give Compound 124 (2.2 mg, 4%). 1H-NMR (MeOD): 1.26 (m, 3H), 1.51 (m, 1H), 1.75-2.06 (m, 3H), 2.66-2.92 (m, 1H), 3.22 (m, 3H), 3.32 (m, 1H), 3.52 (m, 2H), 3.69 (m, 2H), 3.98 (m, 2H), 6.77 (m, 1H), 6.91 (m, 1H), 7.02 (m, 2H), 7.22 (m, 1H), 7.38-7.54 (m, 1H), 7.69-8.11 (m, 1H).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (2.193 g, 10.2 mmol), 3-methylcyclopentanone (2 g, 20.4 mmol) and pyrrolidine (1.67 mL, 19.43 mmol) in MeOH (42 mL) was stirred at room temperature overnight, followed by reflux for 2 days. The mixture was concentrated in vacuo to give the residue, which was added water and HCl (36%) until pH=1. The mixture was extracted with EtOAc and then the organic layer was concentrated to give 6-bromo-3′-methylspiro[chroman-2,1′-cyclopentan]-4-one, which was purified by chromatography (PE:EA 300:1-200:1) (2.3 g, 76%). 1H NMR (CDCl3): 7.94 (d, 1H), 7.52-7.49 (m, 1H), 6.83-6.79 (m, 1H), 2.79 (m, 2H), 2.39-2.22 (m, 0.5H), 2.21-1.95 (m, 3H), 1.91-1.75 (m, 1H), 1.67-1.57 (m, 1H), 1.51-1.41 (m, 0.5H), 1.31-1.15 (m, 1H), 1.08-0.98 (m, 3H).
To a solution of 6-bromo-3′-methylspiro[chroman-2,1′-cyclopentan]-4-one (216 mg, 0.73 mmol) in anhydrous DCM (5.7 mL) was added TiCl4 (1 M solution in DCM, 1.5 mL, 1.49 mmol) dropwise within 15 min at room temperature. The mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (300 mg, 0.36 mL, 1.61 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (20 g) and extracted with DCM (3×20 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-3′-methylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide as light brown solid (225 mg), which was used in the next step without further purification.
To a solution of methylhydroxylamine HCl salt (59 mg, 0.71 mmol) in anhydrous MeOH (8.3 mL) was added NaOMe (25 w % in MeOH, 0.14 mL, 0.63 mmol), followed by (E)-N-(6-bromo-3′-methylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (225 mg, 0.71 mmol). After stiffing for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (15 mL). The mixture was filtered, and the solvent was removed in vacuo to give the crude product, which was purified by preparative TLC (CH2Cl2: MeOH 12:1) to give the pure product 1251 (197 mg, 76%).
Pd(PPh3)2Cl2 (19.2 mg) in a 10 mL tube under Ar was treated sequentially with the compound 125i (50 mg, 0.14 mmol) in 1,4-dioxane (5.1 mL), Cs2CO3 (2 N, 0.76 mL) and 3-cyanophenylboronic acid (40 mg, 0.27 mmol). The mixture was heated under microwave at 120° C. for 45 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC (PE:EA 1:1.5) to give Compound 125 (2.26 mg, 4%). 1H-NMR (MeOD): 7.92 (s, 1H), 7.89-7.87 (m, 1H), 7.75 (s, 1H), 7.66-7.64 (m, 1H), 7.61-7.55 (m, 2H), 7.32-7.24 (m, 1.5H), 6.97-6.88 (m, 1.5H), 3.20 (s, 3H), 2.41-2.31 (m, 2H), 2.12-2.08 (m, 2H), 1.90-1.65 (m, 2H), 1.60-1.40 (m, 2H), 1.14-1.11 (m, 1H), 1.09-1.01 (m, 3H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL flask under Ar was treated sequentially with the compound 117i (40 mg, 0.088 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.2 mL) and 3-propoxyphenylboronic acid (32 mg, 0.176 mmol). The mixture was heated at 120° C. under Ar under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give Compound 126 (5 mg, 15%). 1H-NMR (MeOD): 1.06 (m, 3H), 1.53-1.68 (m, 1H), 1.74-1.91 (m, 3H), 1.93-2.13 (m, 2H), 2.79-2.98 (m, 1H), 3.56-3.68 (m, 2H), 3.72-3.89 (m, 2H), 3.97 (t, 2H), 6.88 (d, 1H), 7.01-7.17 (m, 3H), 7.33 (t, 1H), 7.63 (d, 1H), 7.81 (m, 1H).
4-tert-butylcyclohexanol (10 g, 64.1 mmol) was dissolved in trifluoroacetic acid and then NaNO2 (17.09 g, 256.4 mmol) was added to the solution at 0° C. under an air. After the resulting solution was stirred at room temperature for 5 hours, the solvent was removed in vacuo at room temperature and the residue was added into an aqueous 5% NaHCO3. After the solution was treated with methylene chloride, the aqueous solution was acidified with 10% HCl solution followed by extraction with ethyl acetate to give 3-tert-butyl-6-hydroxyhexanoic acid (5.26 g, 41%).
A suspension of the 3-tert-butyl-6-hydroxyhexanoic acid (1 g, 4.95 mmol), anhydrous NaOAc (0.321 g, 3.91 mmol) and acetic anhydride was refluxed for 5 hours during which time the solution mixture turned black. After the reaction mixture was cooled to room temperature, the formed acetic acid and remaining acetic anhydride were removed on a rotary evaporator and then under high vacuum. The residue was then dissolved in ethyl acetate, filtered through a plug of celite to remove the precipitate
NaOAc, and concentrated in vacuo to give the crude product of 3-tert-butylcyclopentanone (0.557 g, 58%).
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (573 mg, 2.68 mmol), 3-tert-butylcyclopentanone (750 g, 5.36 mol) and pyrrolidine (362 mg, 5.092 mol) in methanol was refluxed overnight. The reaction mixture was removed in vacuo. The residue was diluted with an equal volume of H2O and then added HCl until pH=1. The mixture was extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-3′-tert-butylspiro[chroman-2,1′-cyclopentan]-4-one (0.8 g, 89%). 1H NMR (CDCl3): 0.77 (s, 9H), 1.34 (m, 1H), 1.48 (m, 2H), 1.63 (m, 2H), 1.81 (m, 2H), 2.09 (m, 2H), 2.72 (m, 2H), 6.73 (t, 1H), 7.47 (d, 1H), 7.89 (s, 1H).
To a solution of 6-bromo-3′-tert-butylspiro[chroman-2,1′-cyclopentan]-4-one (200 mg, 0.60 mmol) in dried CH2Cl2 (10 mL) was added TiCl4 (1 M solution in DCM, 1.20 mmol) dropwise within 15 minutes. The mixture was stirred for 1 h after addition. To this mixture was added bis-trimethylsilylcarbodiimide (244 mg, 1.31 mmol) dropwise. The resulting mixture was stirred for 18 h after addition. The reaction mixture was poured into ice-water (30 g) and extracted with CH2Cl2. The combined organic layer was washed with brine, dried over Na2SO4, filtered and concentrated to give (E)-N-(6-bromo-3′-tert-butylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (200 mg, crude), which was used for the next step without further purification.
To a solution of MeNHOH.HCl (46.3 mg, 0.55 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25 wt % in MeOH, 0.11 mL, 0.50 mmol), followed by (E)-N-(6-bromo-3′-tert-butylspiro[chroman-2,1′-cyclopentane]-4-ylidene)cyanamide (200 mg, 0.55 mmol). After stirring for 30 minutes, the solvent was removed in vacuo. The residue was redissolved in CH2Cl2 and filtered. The filtrate was concentrated to give the residue, which was purified by preparative TLC to afford compound 127i (86 mg, 38%). 1H NMR (CDCl3): 1.48-1.61 (m, 1H), 1.73-2.28 (m, 4H), 2.98 (d, 3H), 3.47-3.63 (m, 2H), 3.27 (m, 2H), 3.98 (m, 1H), 6.81-6.93 (m, 4H), 7.02 (m, 2H), 7.24 (m, 2H).
Pd(PPh3)2Cl2 (5 mg) in a 10 mL flask under Ar was treated sequentially with the compound 127i (42 mg, 0.103 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.2 mL) and 3-cyanophenylboronic acid (28.1 mg, 0.154 mmol). The mixture was heated at 120° C. under Ar under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give Compound 127a (7 mg, 16%) and Compound 127b (11 mg, 25%). 1H NMR (MeOD): 0.84-0.96 (m, 9H), 1.52-1.64 (m, 1H), 1.77 (m, 1H), 1.96 (m, 2H), 2.03-2.14 (m, 2H), 2.38 (t, 1H), 2.76 (d, 1H), 3.39 (s, 3H), 6.98 (m, 1H), 7.58-7.73 (m, 3H), 7.99 (m, 3H) (127a). 1H NMR (MeOD): 0.88-0.97 (m, 9H), 1.36 (m, 1H), 1.56-2.07 (m, 6H), 2.43 (m, 1H), 2.73 (m, 1H), 3.41 (s, 3H), 7.01 (m, 1H), 7.59-7.74 (m, 3H), 7.93-8.31 (m, 3H) (127b).
3-Methoxypropan-1-ol (23.85 g, 0.294 mmol) was dissolved in pyridine (20.6 mL) and cooled to 5° C. SOCl2 (28.4 mL) was added dropwise under stirring. After the addition was completed, the reaction mixture was refluxed for 3 h and poured onto crashed ice in concentrated HCl (20 mL). The organic layer was separated and dried over K2CO3 and filtered. The filtrate was concentrated to give the residue, which was purified by fractional distillation to give 1-chloro-3-methoxypropane (13 g, 41%). 1H-NMR (CDCl3): 1.99 (m, 2H), 3.33 (s, 3H), 3.49 (t, 2H), 3.62 (t, 2H).
A mixture of 3-bromophenol (5 g, 29 mmol), 1-chloro-3-methoxypropane (4.33 g, 40 mmol) and K2CO3 (8 g, 57.8 mmol) in DMF (90 mL) was stirred at 100° C. for 2 h. the reaction mixture was filtered and the filtrate was evaporated in vacuo. The residue was taken up in t-BuME, and the organic layer was washed with aqueous NaOH (1N), water (50 mL) and brine. The organic layer was dried and concentrated to give 1-bromo-3-(3-methoxypropoxy)benzene (7 g, 99%). 1H-NMR (CDCl3): 2.02 (m, 2H), 3.33 (s, 3H), 3.54 (m, 2H), 4.02 (m, 2H), 6.82 (m, 1H), 7.11 (m, 3H).
1-Bromo-3-(3-methoxypropoxy)benzene (1 g, 4.61 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (2.27 g, 5.07 mmol), K2CO3 (2.55 g, 18.44 mmol) and Pd(PPh3)2Cl2 (250 mg, 0.277 mmol) in 1,4-dioxane (40 mL) was refluxed under Ar for 12 h. The reaction mixture was cooled to room temperature, diluted with EtOAc, washed with brine, dried and concentrated to give the residue, which was purified by preparative TLC to give 2-(3-(3-methoxypropoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (65 mg, 6%).
Pd(PPh3)2Cl2 (12 mg) in a 10 mL of flask under Ar was treated sequentially with the amine 117i (40 mg, 0.13 mmol) in 1,4-dioxane (1.5 mL), Cs2CO3 (2 M, 0.5 mL) and 2-(3-(3-methoxypropoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (50 mg, 0.19 mmol). The mixture was heated under Ar at 120° C. under microwave for 30 minutes.
The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give Compound 128 (1.47 mg, 3%). 1H-NMR (MeOD): 1.52 (m, 1H), 1.75 (m, 2H), 1.98 (m, 5H), 2.71-2.98 (m, 2H), 3.37 (m, 6H), 3.55 (m, 4H), 3.76 (m, 2H), 4.01 (m, 2H), 6.81 (m, 1H), 6.92 (m, 1H), 7.02 (m, 2H), 7.24 (m, 1H), 7.58 (m, 1H), 7.76 (m, 1H).
A mixture of 3-bromophenol (5 g, 28.9 mmol), 1-chloro-2-methoxyethane (3.77 g, 40 mmol) and K2CO3 (12.63 g, 0.178 mol) in DMF (90 mL) was stirred at 100° C. for 4.5 hours. The reaction mixture was filtered and the filtrate was concentrated in vacuo. The residue is taken up in 100 ml of tert-butyl methyl ether, and the organic phase was washed once each with 50 ml of 1 N NaOH, 50 ml of water and 50 ml of brine. The organic layer was dried with sodium sulphate, filtered and concentrated to give 1-bromo-3-(2-methoxyethoxy)benzene (5.28 g, 79%).
1-Bromo-3-(2-methoxyethoxy)benzene (2 g, 12.6 mmol), K2CO3 (6.96 g, 50 mmol) and Pd(PPh3)2Cl2 (0.687 g, 0.756 mmol) were dissolved in 1,4-dioxane (90 ml). The mixture was refluxed for 12 hours. The reaction mixture was cooled to room temperature, diluted with ethyl acetate, washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by preparative TLC to give 24342-methoxyethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (900 mg, 26%).
Pd(PPh3)2Cl2 (8 mg) in a 10 mL tube under Ar was treated sequentially with compound 117i (50 mg, 0.139 mmol) in 1,4-dioxane (2.5 mL), Cs2CO3 (2 N, 0.4 mL) and 2-(3-(2-methoxyethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (66 mg, 0.236 mmol). The mixture was heated under microwave at 120° C. for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give pure product of Compound 129 (4.43 mg, 7%). 1H-NMR (MeOD): 1.60 (s, 1H), 1.91 (m, 2H), 2.12 (m, 2H), 2.85 (m, 1H), 3.0 (m, 0.5H), 3.07 (m, 3H), 3.35 (s, 3H), 3.45 (s, 3H), 3.65 (m, 2H), 3.8 (m, 4H), 4.2 (s, 2H), 6.95 (s, 1H), 7.05 (t, 1H), 7.2 (m, 2H), 7.35 (m, 1H), 7.65 (d, 1H), 7.8-7.9 (m, 1H), 8.25 (s, 0.2H)
To a solution of 1-(2-hydroxy-5-phenoxyphenyl)ethanone (2.0 g, 8.77 mmol) in toluene (30 mL) was added dihydro-2H-pyran-3(4H)-one (1.14 g, 11.40 mmol) and pyrrolidine (0.81 g, 11.40 mmol), and the reaction mixture was refluxed overnight. After cooling, the mixture was concentrated. The residue was washed with 1 N HCl, brine, dried and concentrated to give the crude product, which was purified by chromatography to afford 6-phenoxy-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (1.40 g, 52%). 1H-NMR (CDCl3): 0.79 (m, 1H), 1.52 (m, 2H), 1.67 (m, 1H), 1.92 (m, 1H), 2.08 (m, 1H), 2.57-2.61 (q, 2H), 3.51 (m, 2H), 3.88 (m, 2H), 6.89 (d, 2H), 7.03 (m, 2H), 7.18 (m, 1H), 7.26 (t, 2H), 7.39 (m, 1H).
To a solution of 6-phenoxy-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (500 mg, 1.27 mmol) and triethylamine (227 mg, 0.73 mmol) in dried CH2Cl2 (10 mL) was added TiCl4 (1 M solution in DCM, 1.47 mmol) dropwise within 15 minutes. The mixture was stirred for 1 h after addition. To this mixture was added bis-trimethylsilylcarbodiimide (300 mg, 1.16 mmol) dropwise. The resulting mixture was stirred for 18 h after addition. The reaction mixture was poured into ice-water (50 g) and extracted with CH2Cl2. The combined organic layer was washed with brine, dried over Na2SO4, filtered and concentrated to give (E)-N-(6-phenoxy-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyan amide (100 mg, crude), which was used for the next step without further purification.
To a solution of MeNHOH.HCl (25 mg, 0.30 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25 w % in MeOH, 0.06 mL, 0.27 mmol), followed by (E)-N-(6-phenoxy-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide (100 mg, 0.30 mmol). After stiffing for 30 minutes, the solvent was removed in vacuo. The residue was redissolved in CH2Cl2 and filtered. The filtrate was concentrated to give the residue, which was purified by preparative TLC to afford Compound 130 (29 mg, 25%). 1H-NMR (CDCl3): 1.48-1.61 (m, 1H), 1.73-2.28 (m, 4H), 2.98 (d, 3H), 3.47-3.63 (m, 2H), 3.27 (m, 2H), 3.98 (m, 1H), 6.81-6.93 (m, 4H), 7.02 (m, 2H), 7.24 (m, 2H).
To a solution of 6-bromo-2-phenylchroman-4-one (1.016 g, 3.35 mmol) in anhydrous DCM under N2 atmosphere was added 1 M TiCl4 (in DCM, 6.7 mL, 6.7 mmol) dropwise within 15 min at room temperature. The mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (1.374 g, 7.37 mmol) dropwise. The resulting mixture was stirred for another 24 h after the addition. The reaction mixture was poured into ice-water (100 g), stirred for a while and filtered through a pad of Celite. The filtrate was extracted with DCM (3×30 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give (E)-N-(6-bromo-2-phenylchroman-4-ylidene)cyanamide as light brown solid (899 mg), which was used in the next step without further purification. MS ESI+ve m/z 327 (M+H)+.
To a solution of methylhydroxylamine HCl salt (280 mg, 3.35 mmol) in anhydrous MeOH (15 mL) was added NaOMe (25 w % in MeOH, 0.67 mL, 3.02 mmol), followed by (E)-N-(6-bromo-2-phenylchroman-4-ylidene)cyanamide (899 mg, 2.75 mmol) solution in MeOH (20 mL), After stiffing for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (20 mL), filtered, and the solvent was removed in vacuo to give 825 mg crude product of 6-bromo-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine as a yellow solid. 270 mg of the crude product was purified on preparative HPLC to give pure title compound as a TFA salt. MS ESI+ve m/z 374 (M+H)+.
To a solution of 6-bromo-2′-methyl-2-phenylspiro[chroman-4,5′-[1,2,4]oxadiazolidin]-3′-imine TFA salt (45 mg, 0.092 mmol), 3-cyanophenylboronic acid (20 mg, 0.14 mmol) and Cs2CO3 (60 mg, 0.18 mmol) in 1,4-dioxane (3 mL) and H2O (0.5 mL) in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (10 mg). After degassing by purging with N2, the mixture was heated to 100° C. for 5 min in a CEM microwave reactor. The solvent was removed under reduced pressure and the residue was purified by preparative HPLC to give 3-(3′-amino-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile (10 mg) as a TFA salt. MS ESI+ve m/z 397 (M+H)+. 1H-NMR (400 MHz, DMSO-d6): 8.14-8.12 (m, 2H), 8.03 (d, J=8.4 Hz, 1H), 7.84-7.79 (m, 2H), 7.66 (t, J=8.0 Hz, 1H), 7.54-7.40 (m, 5H), 7.09 (d, J=8.8 Hz, 1H), 5.29 (d, 11.6 Hz, 1H), 3.34 (s, 3H), 2.75 (d, 14.0 Hz, 1H), 2.37 (dd, J=14.4, 13.2 Hz, 1H).
To a solution of 6-bromo-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine TFA salt (65 mg, 0.13 mmol), 3-pyridineboronic acid (64 mg, 0.52 mmol) and Cs2CO3 (127 mg, 0.39 mmol) in 1,4-dioxane (3 mL) and H2O (0.5 mL) in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (10 mg). After degassing by purging with N2, the mixture was heated to 100° C. for 5 min in a CEM microwave reactor.
The solvent was removed under reduced pressure and the residue was purified by preparative HPLC to give 2′-methyl-2-phenyl-6-(pyridin-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (17 mg) as a TFA salt. MS ESI+ve m/z 393 (M+H)+. 1H-NMR (400 MHz, CD3OD): 9.19 (br s, 1H), 8.87 (d, J=7.6 Hz, 1H), 8.78 (br s, 1H), 8.23 (d, J=2.4 Hz, 1H), 8.11 (t, J=6.4 Hz, 1H), 7.91 (dd, J=8.8, 2.4 Hz, 1H), 7.54-7.38 (m, 5H), 7.21 (d, J=8.8 Hz, 1H), 5.37 (d, 12.8 Hz, 1H), 3.43 (s, 3H), 2.88 (dd, J=14.4, 2.0 Hz, 1H), 2.42 (dd, J=14.4, 12.8 Hz, 1H).
A solution of 2,2-dimethyl-1,3-dioxan-5-one (2.290 g, 17.62 mmol), 5′-bromo-2-hydroxy-acetophone (3.576 g, 17.62 mmol) in MeOH containing pyrrolidine (1 mL) was refluxed for 2 h. The solvent was removed under reduced pressure, and the residue was dissolved in ethyl acetate, and washed with 1 M NaOH, 1 M HCl, H2O and brine successively, dried, and filtered. The filtrate was concentrated to dryness. The crude product was further purified by flash chromatography on silica gel (40 g, eluted with ethyl acetate in hexane 0-25%) give 6-bromo-2′,2′-dimethylspiro[chroman-2,5′-[1,3]dioxan]-4-one as a brownish solid (2.06 g).
To a solution of 6-bromo-2′,2′-dimethylspiro[chroman-2,5′-[1,3]dioxan]-4-one (498 mg, 1.5 mmol), 3-cyanophenylboronic acid (440 mg, 3.0 mmol) and Cs2CO3 (1.460 mg, 4.5 mmol) in 1,4-dioxane (4 mL) and H2O (0.5 mL) in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (75 mg). After degassed by purging with N2, the mixture was heated to 100° C. for 5 min in a CEM microwave reactor. The solvent was removed under reduced pressure and the residue was purified by flash chromatography on silica gel (12 g, eluted with ethyl acetate in hexane 0-30%) give 3-(2′,2′-dimethyl-4-oxospiro[chroman-2,5′-[1,3]dioxane]-6-yl)benzonitrile as a yellowish solid (298 mg). MS ESI+ve m/z 350 (M+H)+.
To a solution of 3-(2′,2′-dimethyl-4-oxospiro[chroman-2,5′-[1,3]dioxane]-6-yl)benzonitrile (155 mg, 0.44 mmol) in anhydrous DCM (10 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.88 mL, 0.88 mmol) dropwise within 15 min at room temperature. The mixture was stirred for 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (181 mg, 217 μL 0.97 mmol) dropwise. The resulting mixture was stirred for another 20 h after the addition. The reaction mixture was poured into ice-water (25 g), stirred for 30 min and filtered through a pad of Celite. The separated aqueous phase of the filtrate was extracted with DCM once. The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give yellowish gel like solid (E)-N-(6-(3-cyanophenyl)-2,2-bis(hydroxymethyl)chroman-4-ylidene)cyanamide (160 mg), which was used in the next step without further purification. MS ESI+ve m/z 374 (M+H)+.
To a solution of methylhydroxylamine HCl salt (36.7 mg, 0.44 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25 w % in MeOH, 90 μL, 0.39 mmol), followed by a solution of (E)-N-(6-(3-cyanophenyl)-2,2-bis(hydroxymethyl)chroman-4-ylidene)cyanamide (147 mg, 0.44 mmol) solution in MeOH (2 mL) after 5 min. After stirring for 10 min, the solvent was removed in vacuo. The residue was redissolved in DCM (20 mL), filtered, and the solvent was removed in vacuo to give crude product, which was purified by preparative HPLC to afford 43 mg of 3-(2,2-bis(hydroxymethyl)-3′-imino-2′-methylspiro[chroman-4,5′-[1,2,4]oxadiazolidine]-6-yl)benzonitrile TFA salt as a white solid. MS ESI+ve m/z 381 (M+H)+. 1H NMR (400 MHz, CD3OD): 7.98-7.90 (m, 3H), 7.72-7.58 (m, 3H), 7.07 (d, J=8.4 Hz, 1H), 3.86-3.70 (m, 4H), 3.67 (s, 3H), 2.84 (d, J=14.8 Hz, 1H), 2.43 (d, J=14.8 Hz, 1H).
To a solution of 3-(2,2-bis(hydroxymethyl)-3′-imino-2′-methylspiro[chroman-4,5′-[1,2,4]oxadiazolidine]-6-yl)benzonitrile TFA salt (16 mg, 0.03 mmol) in 2,2-dimethoxypropane (2.5 mL) and acetone (0.5 mL) was added catalytic amount of anhydrous p-TSA. The reaction was monitored by HPLC, very low conversion was found at 2 h. Excess of p-TSA (>1 eq.) was added and stirred for another 20 min. The reaction mixture turned cloudy. HPLC showed only a little starting material left. TEA (0.5 mL) was added and the reaction mixture was stirred for another 5 min and concentrated to dryness. The residue was purified by preparative HPLC to afford 3-(3″-imino-2″-methylspiro[spiro(chroman-2,1′-(4,4-dimethyl-3,5-dioxane))-4,5″-[1,2,4]oxadiazolidine]-6-yl)benzonitrile TFA salt (8 mg). MS ESI+ve m/z 421 (M+H)+. 1H NMR (400 MHz, CD3OD): 7.90 (d, J=1.2 Hz, 1H), 7.87 (m, 1H), 7.66 (m, 2H), 7.61-7.56 (m, 2H), 7.03 (d, J=8.4 Hz, 1H), 4.12-3.85 (m, 4H), 3.09 (s, 3H), 2.42 (d, J=14.4 Hz, 1H), 2.01-1.43 (m, 1H), 1.47 (s, 3H), 1.43 (s, 3H).
Anhydrous aluminum chloride (84 g, 0.486 mol) is suspended in methylene chloride (1200 mL), and then acetyl chloride (49.2 g, 0.629 mol) is added while stiffing and cooling on ice. The mixture is stirred for 20 minutes while cooling on ice and 4-bromophenol (98 g, 0.57 mol) is added. The reaction mixture is stirred at room temperature for 1 h, and then ice water is added and extraction is performed with ethyl acetate. The organic layer is washed with brine and then dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue is purified by silica gel column chromatography to yield acetic acid 4-bromo-phenyl ester (104 g, 85%). 1H-NMR (CDCl3): 2.28 (s, 3H), 6.98 (d, 2H), 7.48 (d, 2H).
A mixture of 4-bromophenyl acetate (104 g, 0.484 mol) and anhydrous aluminum chloride (130.5 g, 0.968 mol) is stirred at 120-140° C. for 20 minutes. The reaction mixture is cooled to 60-80° C., ice water is added and extraction is performed with ethyl acetate. The organic layer is washed with brine and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue is purified by silica gel column chromatography to yield the 1-(5-bromo-2-hydroxy-phenyl)-ethanone (101 g, 98%).
1H-NMR (CDCl3): 2.60 (s, 3H), 6.87 (d, 1H), 7.53 (dd, 1H), 7.81 (s, 1H), 12.12 (s, 1H).
A solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (21.4 g, 0.1 mol), acetone (365 mL) and pyrrolidine (8.4 mL) in toluene (220 mL) is refluxed for 4 h. To the reaction mixture is added acetone (36.5 mL), the mixture is refluxed for 15 h. Then 1 N HCl (220 mL) is added, extracted with ethyl acetate (200 mL 3×). The combined organic layers were washed with water (150 mL), brine (150 mL), dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromo-2,2-dimethyl-chroman-4-one (18 g, 71%).
1H-NMR (CDCl3): 1.45 (s, 6H), 2.71 (s, 2H), 6.82 (d, 1H), 7.52 (dd, 1H), 7.96 (d, 1H).
A glass pressure tube is charged with a mixture of 6-bromo-2,2-dimethyl-chroman-4-one (6.4 g, 25 mmol), KCN (3.25 g, 50 mmol), and (NH4)2CO3 (18 g, 187.5 mmol). Formamide (80 mL) is added to fill the pressure tube nearly completely. The mixture is heated at 70° C. for 24 h then at 110° C. for another 48 h. The reaction mixture is then cooled and poured over ice. Acidification with concentrated HCl yields a precipitate which is filtered, washed twice with water, and then resolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate is concentrated in vacuo to give a residue, which is purified by column to give 6-bromo-2,2-dimethylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (8.2 g, 100%).
1H-NMR (DMSO): 1.24 (s, 3H), 1.40 (s, 3H), 2.16 (d, 1H), 2.30 (d, 1H), 6.80 (d, 1H), 7.10 (m, 1H), 7.39 (d, 1H), 8.69 (s, 1H), 11.08 (brs, 1H).
6-Bromo-2,2-dimethylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (4 g, 12.3 mmol) and 1 M Et3O.BF4 (4.7 g, 24.7 mmol) is dissolved in dry CH2Cl2 (100 mL). Then the mixture is heated to reflux for 24 h. The solvent is removed in vacuo to give a residue, which is purified by column to give 6-bromo-2′-ethoxy-2,2-dimethylspiro[chroman-4,4′-imidazol]-5′(37-1)-one (1 g, 25%).
6-Bromo-2′-ethoxy-2,2-dimethylspiro[chroman-4,4′-imidazol]-5′(3′H)-one (500 mg, 1.42 mmol) is dissolved in 30 mL of EtOH, and NH3.H2O (30 mL) is added. The mixture is heated to reflux for 18 h. The mixture is removed in vacuo to give a residue, which is purified by preparative TLC to give 2′-amino-6-bromo-2,2-dimethylspiro-[chroman-4,4′-imidazol]-5′(3′H)-one (120 mg, 30%).
NaH (5.3 mg, 0.131 mmol) is added to a solution of 2′-amino-6-bromo-2,2-dimethyl-spiro[chroman-4,4′-imidazol]-5′(3′H)-one (45 mg, 0.131 mmol) in THF (3 mL) at 0° C. under N2. The mixture is stirred for 1 h at room temperature. Then MeI (18.6 mg, 0.131 mmol) is added. The mixture is quenched with water and extracted with ethyl acetate. The organic layer is concentrated in vacuo. The residue is purified by preparative TLC to give 2′-amino-6-bromo-1′,2,2-trimethylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (40 mg, 80%).
1H-NMR (MeOD): 1.3 (s, 3H), 1.40 (s, 3H), 1.85 (d, 1H), 2.25 (d, 1H), 3.1 (s, 3H), 6.65 (d, 1H), 6.8 (s, 1H), 7.20 (s, 1H).
Pd(PPh3)4 (15.13 mg, 0.013 mmol) is added to the solution of 2′-amino-6-bromo-1′,2,2-trimethylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (44.15 mg, 0.13 mmol) and 3-cyanophenylboronic acid (19.25 mg, 0.13 mmol) in dimethyl-benzene (5 mL) and an aqueous solution of Na2CO3 (2 M, 0.24 mL). The mixture is heated at 90° C. in an oil bath overnight. The mixture is concentrated to give the crude product, which is purified by preparative TLC to give the desired product 3-(2′-amino-1′,2,2-trimethyl-5′-oxo-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (10 mg, 15%).
1H-NMR (MeOD): 2.1 (s, 6H), 3.30 (s, 3H), 4.0 (s, 2H), 7.7 (t, 2H), 7.9 (d, 2H), 8.1 (d, 2H), 8.3 (s, 1H).
A mixture of 1-(2-hydroxyphenyl)ethanone (30 g, 220 mmol), benzaldehyde (23.3 g, 220 mmol) and borax (84 g, 220 mmol) in ethanol (180 mL) and H2O (300 mL) was refluxed for one day. The reaction mixture was cooled, diluted with an equal volume of H2O, and extracted with ether. The combined organic layers were dried over anhydrous Na2SO4, filtered, and evaporated. The residue was purified by column to give 2-phenylchroman-4-one (20 g, 40%).
A glass pressure tube is charged with a mixture of 2-phenylchroman-4-one (8 g, 35.7 mmol), KCN (4.64 g, 71.4 mmol), and (NH4)2CO3 (25.7 g, 267.7 mmol). Formamide (100 mL) is added to fill the pressure tube nearly completely. The mixture is heated at 70° C. for 24 h then at 110° C. for another 48 h. The reaction mixture is then cooled and poured over ice. Acidification with concentrated HCl gives a precipitate which is filtered, washed twice with water, and then resolved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate is concentrated in vacuo to give a residue, which is purified by column to give 2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (2 g, 20%).
A suspension of 2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (600 mg, 2.04 mmol) and Lawesson's Reagent (825 mg, 2.04 mmol) in dry 1,4-dioxane (28 mL) is heated under reflux for 24 h. The mixture is concentrated in vacuo and the residue is purified by column to give 2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (300 mg, 50%).
To a solution of 2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (200 mg, 0.645 mmol) in MeOH (10 mL) is added a solution of NaOH (51.6 mg, 1.29 mmol) in H2O (2 mL). After stiffing for 10 minutes, MeI (922 mg, 6.45 mmol) is added. The reaction mixture is heated under reflux for 2 h. The mixture is concentrated in vacuo to give a residue, which is purified by preparative TLC to give 1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (50 mg, 30%).
A solution of 1′-methyl-2′-(methylthio)-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (50 mg, 0.148 mmol) and NH4I (42.9 mg, 0.296 mmol) in NH3/EtOH (4 mL, 1.5 N) is heated at 110° C. in a tube under microwave reactor for 2-2.5 h. After cooling, the mixture is concentrated in vacuo to give a residue, which is purified by preparative TLC to afford 2′-amino-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (5 mg, 10%).
1H-NMR (MeOD): 2.0 (d, 1H), 2.35 (t, 1H), 3.0 (s, 3H), 5.2 (d, 0.376H), 5.75 (d, 1H), 6.78 (m, 2H), 6.99 (d, 1H), 7.16 (t, 1H), 7.2 (m, 3H), 7.4 (m, 2H).
To a 50 mL round bottom flask is added 1-(5-bromo-2-hydroxyphenyl)ethanone (2.0 g, 9.3 mmol), followed by 4-tert-butylcyclohexanone (1.43 g, 9.3 mmol). MeOH (20 mL) is added to give a clear solution, followed by pyrrolidine (1 mL). A condenser is attached to the RB flask, and the resulting solution is heated at 60° C. for two hours. MeOH is removed and the residue is redissolved in EtOAc (30 mL), washed with 1 N NaOH (10 mL), and 1 N HCl (10 mL), and dried over Na2SO4. Solvent is removed in vacuo to give 6-bromo-4′-t-butylspiro[chroman-2,1′-cyclohexan]-4-one (2.41 g, 74%), which is used for the next step without purification.
A 10 mL CEM microwave test tube is filled with a mixture of 6-bromo-4′-t-butylspiro[chroman-2,1′-cyclohexan]-4-one (0.4 g, 1.1 mmol), KCN (0.15 g, 2.2 mmol), and (NH4)2CO3 (0.8 g, 7.7 mmol). A 2:1 mixture of formamide and DMF (6.5 to 7 mL) is added to fill the test tube nearly completely. The resulting mixture is heated in a CEM microwave reactor at 65° C. for 5 hrs. Another 4 tubes (total 1.87 g) are irradiated under the same conditions, and the resulting mixture is combined, acidified with concentrated HCl, diluted with EtOAc (20 mL), and washed with H2O (10 mL×3). The organic layer is dried over Na2SO4, and solvent is removed in vacuo to give a crude product, which is purified by flash chromatography column (0 to 60% EtOAc/hexane) to give the hydantoin 134ii (42 g, 26% corrected for recovered starting material 0.52 g). MS m/z 421 (M+H+).
To a solution of the above hydantoin (0.42 g, 1.0 mmol) in 1,4-dioxane (5 mL) in a 10 mL CEM microwave test tube, there is added Lawesson's reagent (0.40 g, 1.0 mmol). The resulting mixture is heated in a CEM microwave reactor at 110° C. for 30 min and cooled to rt. The solvent is removed in vacuo, and the residue is purified by flash chromatography column to give the thiol-hydantoin 134iii (0.35 g, 81%). MS m/z 437 (M+H+).
To a solution of the above thio-hydantoin (100 mg, 0.23 mmol) in MeOH (2 mL) in a 10 mL CEM microwave test tube, there is added a 0.6 N NaOH aqueous solution (0.5 mL). After stirring at rt for 10 min, MeI (0.5 mL, excess) is added and the reaction mixture is heated in a CEM microwave reactor at 60° C. for 10 min. The resulting mixture is concentrated in vacuo to give the crude product, which is purified by flash chromatography column to give the dimethy thiol-hydrantoin 134iv (25.5 mg, 24%). MS m/z 465 (M+H+).
To a solution of the above dimethylated thiol-hydantoin (25.5 mg, 0.05 mmol) in NH3/MeOH (7 N, 1 mL) in a CEM microwave test tube, there is added NH4I (24 mg, 0.15 mmol). The resulting mixture is heated in a CEM microwave reactor at 110° C. for 3 hrs.
After the reaction is done, the mixture is concentrated in vacuo to give the crude product, which is purified by reversed phase HPLC to give the acyl-guanidine 134v (23 mg, 84%) as a TFA salt. MS m/z 434 (M+H+).
To a solution of the above acyl-guanidine (23 mg, 0.04 mmol) in 1,4-dioxane (1 mL) there is added excess amount of Cs2CO3, 3-cyanophenylboronic acid, and catalytical amount of 1,1′-Bis(diphenylphosphino)ferrocene palladium dichloride. After degassing, the resulting mixture is heated in a CEM microwave reactor at 120° C. for 30 min Solvent is removed in vacuo and the residue is purified by reversed phase HPLC to give the final product compound 134 (2.5 mg, 11%) as a TFA salt.
1H NMR (400 MHz, CD3OD): 8.16-7.84 (m, 2H), 7.78-7.64 (m, 3H), 7.52 (s, 1H), 7.14 (m, 1H), 3.38 (s, 3H), 3.20, 3.14 (two s, 2H), 2.80-2.10 (m, 3H), 1.98-1.10 (m, 6H), 0.98 (s, 9H); MS m/z 457 (M+H+).
To a solution of 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (440 mg, 1.18 mmol) in 1,4-dioxane (3.6 mL) in a 10 mL CEM microwave test tube, there is added Lawesson's reagent (477 mg, 1.18 mmol). The resulting mixture is heated in a CEM microwave reactor at 110° C. for 40 min and cooled to rt. The solvent is removed in vacuo, and the residue is purified by flash chromatography column to give 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (238 mg, 52%). MS m/z 389 (M+H+).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (110 mg, 0.28 mmol) in MeOH (5 mL) in a 10 mL CEM microwave test tube is added a 0.6 N NaOH aqueous solution (1.0 mL). After stiffing at rt for 10 min, MeI (158 mg, 1.08 mmol) is added, and the reaction is continued with stiffing at rt for 2 hrs. Upon removing the solvent in vacuo, the residue is purified by flash chromatography column to give 1′-benzyl-2′-(benzylthio)-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (63.3 mg, 39%). MS m/z 569 (M+H+).
To a solution of 1′-benzyl-2′-(benzylthio)-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (60 mg, 0.10 mmol) in MeOH/EtOH (1:1, 2 mL) in a 10 mL CEM microwave test tube is added NH4I (50 mg, 0.34 mmol) and NH3/MeOH (7 N, 2 mL). The resulting mixture is heated in a CEM microwave reactor at 120° C. for 60 min. The cooled mixture is concentrated in vacuo and the residue is purified by a reversed HPLC to give 2′-amino-1′-benzyl-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (17.3 mg, 34%) as a TFA salt. MS m/z 462 (M+H+).
To a solution of 2′-amino-1′-benzyl-6-bromo-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (17.3 mg, 0.04 mmol) in 1,4-dioxane (1.5 mL) there is added Cs2CO3 (excess), 3-cyanophenylboronic acid (excess), and catalytical amount of PdCl2dppf. After degassing, the resulting mixture is heated in a CEM microwave reactor at 130° C. for 30 min Solvent is removed in vacuo and the residue is purified by reversed phase HPLC to give 3-((2R,4R)-2′-amino-1′-benzyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (6.0 mg, 33%) as a TFA salt
(135a) and 3-((2S,4R)-2′-amino-1′-benzyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (0.86 mg, 4.8%) as a TFA salt. (135b).
1H NMR (400 MHz, CD3OD): 7.84-7.60 (m, 4H), 7.74-7.24 (m, 12H), 7.12 (d, 1H), 5.92 (d, 1H), 4.62 (s, 2H), 2.60 (d, 1H), 2.42 (d, 1H); MS m/z 485 (M+H+) (135a).
1H NMR (400 MHz, CD3OD): 7.74-7.36 (m, 16H), 7.16 (d, 1H), 5.24 (d, 1H), 5.08, 5.00 (two d, 2H), 2.64 (d, 1H), 2.56 (d, 1H); MS m/z 485 (M+H+) (135b).
To a solution of the 4-N-Boc-piperidinyl-spiro-hydantoin (167.3 mg, 0.36 mmol) in 1,4-dioxane (4.5 mL) in a 10 mL CEM microwave test tube, there is added Lawesson's reagent (144.0 mg, 0.36 mmol). The resulting mixture is heated in a CEM microwave reactor at 150° C. for 40 min and cooled to rt. The solvent is removed in vacuo to give a crude thiol-4-piperidinyl-spiro-hydantoin, which is used for the next step without purification. MS m/z 382 (M+H+).
To a solution of the above crude product in MeCN/H2O (3:1, 1 mL) there is added K2CO3 (excess) followed by acetyl chloride (excess). The resulting solution is stirred at rt for 10 min, and solvent is removed in vacuo. The residue is purified by reversed phase HPLC to give the thio-4-N-acyl-piperidinyl-spiro-hydantoin (80 mg, 52% two steps). MS m/z 424 (M+H+).
To a solution of the thio-4-N-acyl-piperidinyl-spiro-hydantoin (80 mg, 0.19 mmol) in MeOH (6 mL) in a 10 mL CEM microwave test tube, there is added a 0.6 N NaOH aqueous solution (1.0 mL). After stirring at rt for 10 min, MeI (100 μL, excess) is added, the reaction mixture is stirred at rt for 30 min, and then heated in a CEM microwave reactor at 60° C. for 20 min. The resulting mixture is concentrated in vacuo to give crude dimethylated thiol-4-N-acyl-piperidinyl-spiro-hydantoin, which is used for the next step without purification. MS m/z 452 (M+H+).
To a solution of the dimethylated thiol-4-N-acyl-piperidinyl-spiro-hydantoin (0.19 mmol) in MeOH (1 mL) in a 10 mL CEM microwave test tube, there is added NH4I (excess) and NH3/MeOH (7 N, 1.5 mL). The resulting mixture is heated in a CEM microwave reactor at 120° C. for 30 min. Upon cooling, solvent is removed in vacuo and the residue is purified by a reversed phase HPLC to give 4-N-acyl-piperidinyl-spiro-acyl-guanidine (20 mg, 25%) as a TFA salt. MS m/z 421 (M+H+).
To a solution of 4-N-acyl-piperidinyl-spiro-acyl-guanidine (20 mg, 0.05 mmol) in 1,4-dioxane (1.5 mL) there is added Cs2CO3 (excess), 3-cyanophenylboronic acid (excess), and catalytical amount of PdCl2dppf. After degassing, the resulting mixture is heated in a CEM microwave reactor at 120° C. for 30 min Solvent is removed in vacuo and the residue is purified by a reversed phase HPLC to give the 4-N-acyl-piperidinyl-spiro-acyl-guanidine final product compound 136 (7.0 mg, 32%) as a TFA salt. 1H NMR (400 MHz, CD3OD): 7.94 (m, 1H), 7.86 (m, 1H), 7.66 (m, 2H), 7.60 (m, 1H), 7.48 and 7.40 (two d, 1H), 7.16 (m, 1H), 3.34 (m, 1H), 3.86-3.40 (m, 3H), 3.22 (m, 1H), 3.10, 3.06 (two s, 3H), 2.56, 2.40 (two m, 2H), 2.20-1.96 (m, 5H), 1.90-1.62 (m, 2H); MS m/z 444 (M+H+).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(2-(dimethylamino) ethylcarbamoyl)phenylboronic acid (25 mg, 0.104 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 4-(2′-amino-1′-methyl-5′-oxo-2-phenyl-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)-N-(2-(dimethylamino)ethyl)benzamide (4.68 mg, 18%). 1H-NMR (MeOD): 2.47 (m, 1H), 2.63 (m, 1H), 3.01 (s, 6H), 3.30 (s, 3H), 3.42 (m, 2H), 3.79 (m, 2H), 5.88 (m, 1H), 7.17 (m, 1H), 7.39 (m, 1H), 7.46 (m, 2H), 7.52 (m, 2H), 7.58 (m, 1H), 7.71 (m, 1H), 7.76 (m, 2H), 7.96 (m, 2H).
Combine 2,2,2-trifluoro-ethanol (6.2 mL), pyridine (6.8 mL) and CH2Cl2 (20 mL) cooled in an ice bath. Add Tf2O (25 g) over about 45 minutes. After 15 minutes, add water, separate the layers and extract with water. The organic layer was dried over Na2SO4 and concentrated through a short path distillation apparatus (8 g, 54%).
To a solution of 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (113 mg, 0.29 mmol) in DMF (7 mL) was added Cs2CO3 (190 mg, 0.58 mmol) and 2,2,2-trifluoroethyl trifluoromethanesulfonate (204 mg, 0.87 mmol). After stiffing for 2 days, the mixture was extracted from water with EtOAc. The combined organic layers were washed with water and brine, dried and then concentrated to give the residue, which was purified by preparative TLC to give 6-bromo-2-phenyl-1′-(2,2,2-trifluoroethyl)-2′-(2,2,2-trifluoroethylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (60 mg, 36%).
A solution of 6-bromo-2-phenyl-1′-(2,2,2-trifluoroethyl)-2′-(2,2,2-trifluoroethylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (60 mg), NH4I (10 mg) in a solution of NH3/EtOH (2 mL, 1.5 N) was heated at 110 in a tube under microwave reactor for 2-2.5 h. After cooling, the mixture was concentrated in vacuum to give the residue, which was purified by preparative TLC to afford 2′-amino-6-bromo-2-phenyl-1′-(2,2,2-trifluoroethyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (30 mg, 61%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with 2′-amino-6-bromo-2-phenyl-1′-(2,2,2-trifluoroethyl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.044 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 M, 0.3 mL) and 3-cyanophenylboronic acid (13 mg, 0.088 mmol). The mixture was heated at 120 under microwave reactor for 0.5 h. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give pure 3-(2′-amino-5′-oxo-2-phenyl-1′-(2,2,2-trifluoroethyl)-1′,5′-dihydrospiro[chroman-4,4′-imidazole]-6-yl)benzonitrile (3.7 mg, 12%). 1H-NMR (MeOD): 2.27 (m, 1H), 2.35 (m, 1H), 3.87 (m, 2H), 5.83 (m, 1H), 7.01 (d, 1H), 7.26 (m, 1H), 7.32 (m, 5H), 7.59 (m, 3H), 7.76 (m, 1H), 7.81 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(benzyloxy)phenylboronic acid (24 mg, 0.104 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 2′-amino-6-(4-(benzyloxy)phenyl)-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (1.75 mg, 7%). 1H-NMR (MeOD): 2.46 (m, 1H), 2.59 (m, 1H), 3.29 (s, 3H), 5.12 (s, 2H), 5.83 (m, 1H), 7.04 (m, 2H), 7.09 (m, 1H), 7.31 (m, 1H), 7.38 (m, 4H), 7.45 (m, 4H), 7.50 (m, 4H), 7.56 (m, 1H).
To a solution of 6-(benzylox)-2-phenylchroman-4-one (211.2 mg, 0.64 mmol) in anhydrous DCM (5 mL) was added TiCl4 (1 M solution in DCM, 1.3 mL, 1.3 mmol) dropwise with in 15 minutes at room temperature. It was stirred another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (262 mg, 0.32 mL, 1.408 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition. The reaction mixture was poured into ice-water (25 g), extracted with DCM (3×15 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered, and then concentrated to give (E)-N-(6-hydroxy-2-phenylchroman-4-ylidene)cyanamide (140 mg, 83%), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (28 mg, 0.326 mmol) in anhydrous MeOH (8 mL) was added NaOMe (25 wt. % in MeOH, 15.83 mg, 0.294 mmol), followed by (E)-N-(6-hydroxy-2-phenylchroman-4-ylidene)cyanamide (86 mg, 0.326 mmol). After stirred 10 minutes, the solvent was removed in vacuum. The residue was dissolved in DCM (15 mL) and filtered, and the solvent was removed in vacuum to give the crude product, which was purified by preparative TLC to give 3′-amino-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-6-ol (20 mg, 20%). 1HNMR (CDCl3): 7.30-7.51 (m, 5H), 6.95 (s, 1H), 6.69 (m, 2H), 5.15 (t, 3H), 2.98 (s, 3H), 2.28 (d, 2H), 1.17 (s, 1H).
A mixture of 3′amino-2′-methyl-2-phenyl-2′H-spiro(chroman-4,5′-(1,2,4)oxadiazol)-6-ol (30 mg, 0.096 mmol), (bromomethyl)benzene (21.45 mg, 0.125 mmol) and K2CO3 (16 mg, 0.115 mmol) was dissolved in acetone, then the mixture was stirred at room temperature for 24 hours. The mixture was filtrated and concentrated. The residue was purified by preparative HPLC to give 6-(benzyloxy)-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (140) (0.95 mg, 3%). 1H-NMR (MeOD): 7.32-7.56 (m, 10H), 6.91-7.23 (m, 3H), 5.12 (d, 2H), 5.23 (t, 2H), 3.31 (s, 3H) 2.73 (m, 1H), 2.32 (m, 1H);
2′-methyl-3′-(phenoxyamino)-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-6-ol (1.05 mg, 3%). 1H-NMR (MeOD): 7.32 (s, 6H), 7.20 (s, 2H), 7.06 (s, 2H), 6.83 (d, 1H), 6.74 (t, 2H), 4.91 (d, 1H), 4.25 (d, 1H), 3.36 (s, 3H), 2.37 (d, 2H), 1.86 (t, 3H)
In a bottle were combined 1-(5-bromo-2-hydroxy-phenyl)-ethanone (12 g, 56 mmol), pyridine-2-carbaldehyde (5.4 mL, 56 mmol), EtOH (96%, 67 mL) and NaOH (19.75 g, 494 mmol). The mixture was stirred vigorously for 0.5 h and then filtered. The mixture was poured into HCl (1 N, 500 mL) and filtered. The solid was dried to give 1-(5-bromo-2-hydroxy-phenyl)-3-pyridin-2-yl-propenone (10 g, 59%).
1-(5-Bromo-2-hydroxy-phenyl)-3-pyridin-2-yl-propenone (13 g, 43 mmol) was dissolved in H2O (321 mL) and EtOH (107 mL). Then NaOH (1.72 g, 43 mmol) was added. The mixture was stirred overnight and filtered. The cake was dissolved in EtOAc and washed with H2O twice. The organic layer was dried and filtered. The filtrate was concentrated to give 6-bromo-2-pyridin-2-yl-chroman-4-one (2.22 g, 17%). 1H-NMR (CDCl3): 3.14 (m, 2H), 5.57 (m, 1H), 6.98 (m, 1H), 7.29 (m, 1H), 7.57 (m, 1H), 7.76 (m, 1H), 8.00 (m, 1H), 8.61 (m, 1H).
To a solution of 6-bromo-2-pyridin-2-yl-chroman-4-one (303 mg, 1 mmol) in DCM (10 mL) was added TiCl4 (4 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (0.5 mL, 2.2 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (50 g). The aqueous layer was extracted with CH2Cl2, which was combined with the organic layer. The organic layer was dried and concentrated to give crude 6-bromo-2-pyridin-2-yl-chroman-4-ylidene-cyanamide (300 mg, 92%).
To a solution of N-methyl-hydroxylamine hydrochloride (31 mg, 0.31 mmol) in MeOH (4 mL) was added MeONa (0.06 mL, 25% (Wt.) in MeOH), followed by 6-bromo-2-pyridin-2-yl-chroman-4-ylidene-cyanamide (100 mg, 0.31 mmol). After stirred for 10 minutes, the solvent was removed in vacuo. The residue was purified by preparative TLC to give 6-bromo-2′-methyl-2-(pyridin-2-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (45 mg, 40%). 1H-NMR (MeOD): 2.13 (m, 1H), 2.48 (m, 1H), 3.08 (m, 3H), 5.32 (m, 1H), 6.86 (m, 1H), 7.36 (m, 2H), 7.51 (m, 1H), 7.68 (m, 1H), 7.90 (m, 1H), 8.52 (m, 1H).
To a solution of 6-bromo-2-(pyridine-3-yl)chroman-4-one (1.0 g, 3.3 mmol) in anhydrous DCM (20 mL) was added TiCl4 (1 M solution in DCM, 2.5 g, 13.2 mmol) dropwise within 15 minutes at room temperature in absence of light. It was stirred for another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (1.35 g, 7.26 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was poured into ice-water, extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give (E)-N-(6-bromo-2-(pyridine-3-yl)chroman-4-ylidene)cyanamide (687 mg, 64%), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (176 mg, 2.1 mmol) in anhydrous
MeOH (15 mL) was added NaOMe (25% in MeOH (Wt. %), 0.47 mL, 1.89 mmol), followed by (E)-N-(6-bromo-2-(pyridine-3-yl)chroman-4-ylidene)cyanamide (687 mg, 2.1 mmol). After stirred for 10 mins, the solvent was removed in vacuo. The residue was redissolved in DCM (15 mL). The mixture was filtered, and the solvent was removed to give the residue, which was purified by preparative TLC to give 6-bromo-2′-methyl-2-(pyridine-3-yl)-2′H-spiro-[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (190 mg, 24%). 1H-NMR (MeOD): 2.18-2.25 (m, 1H), 2.39 (m, 1H), 3.09 (s, 3H), 5.34-5.38 (m, 1H), 6.81-6.86 (t, 1H), 7.37-7.40 (m, 1H), 7.45-7.55 (m, 1H), 7.62 (s, 1H), 7.97-7.99 (m, 1H), 8.52-8.54 (m, 1H), 8.66 (d, 1H).
To a solution of 2-(2-bromophenyl)acetic acid (2 g, 9.3 mmol) in anhydrous methanol (20 mL) was added 4-methylbenzenesulfonic acid hydrate (1.767 g, 9.3 mmol).
The mixture was heated to reflux for 3 hr. The solvent was removed in vacuum. Ethyl ether and water was added. The organic phase was washed with water and brine, then dried over Na2SO4, filtered and concentrated to give methyl 2-(2-bromophenyl)acetate (2 g, 80%), which was used for next step without purification.
2-(2-Bromophenyl)acetate (10 g, 43.7 mmol) and 4-chlorophenol (5.61 g, 43.7 mmol) were dissolved in dioxane (150 mL) whiling warming to 50. To the resulting solution were added, under stirring in an inert nitrogen atmosphere, cesium carbonate (28.35 g, 87.4 mmol) and copper (I) chloride (1.73 g, 17.48 mmol). Finally N,N-dimethylglycine (0.9 g, 8.74 mmol) was added to the green suspension. The mixture was heated at 110 for 2 days while stirring. The mixture was filtrated over dicalite, which was washed with dioxane (20 mL). The dioxane was removed in vacuum to leave brownish oil. EtOAc was added to the oil and the pH of the resulting mixture was adjusted to 1 by addition of 1 M HCl. The organic phase was washed with saturated brine, dried over Na2SO4 and concentrated under vacuum to yield the crude product, which was purified by column chromatography to give 2-(2-(4-chlorophenoxy)phenyl)acetic acid (8 g, 70%).
The solution of 2-(2-(4-chlorophenoxy)phenyl)acetic acid (2.1 g, 8 mmol) and PPA (21 g, 148 mmol) was heated to reflux overnight. Then the mixture was and the filtrate was removed in vacuo, dissolved in CH2Cl2, filtrated. The solvents were evaporated to give the crude product, which was purified by column chromatography to give 6-bromo-2-(tetrahydro-2H-pyran-4-yl)chroman-4-one (1.7 g, 80%).
To a solution of 8-chlorodibenzo[b,f]oxepin-10(11H)-one (732 mg, 3.84 mmol) in anhydrous DCM (30 mL) was added TiCl4 (1 M solution in DCM, 7.8 mL, 7.8 mmol) dropwise within 15 minutes at room temperature. It was stirred another 1 h after the addition. To this mixture was added bis-trimethylsilylcarbodiimide (1.48 g, 1.89 mL, 8.46 mmol) dropwise. The resulting mixture was stirred for another 18 h after the addition.
The reaction mixture was poured into ice-water (100 g), extracted with DCM (3×50 mL).
The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give (E)-N-(8-chlorodibenzo[b,f]oxepin-10(11H)-ylidene)cyanamide (500 mg, 68%), which was used for next step without further purification.
To a solution of methylhydroxylamine HCl salt (50.16 mg, 0.6 mmol) in anhydrous MeOH (6 mL) was added NaOMe (25% in MeOH (Wt. %), 0.12 mL, 0.54 mmol), followed by (E)-N-(8-chlorodibenzo[b,f]oxepin-10(11H)-ylidene)cyanamide (160 mg, 0.6 mmol). After stirred 10 min, the solvent was removed in vacuum. The residue was redissolved in DCM (10 mL). The mixture was filter, and the solvent was removed to give the residue, which was purified by column chromatography to give compound 144 (100 mg, 80%). 1H-NMR (CDCl3): 3.20 (m, 2H), 3.48 (m, 2H), 1.95 (m, 1H), 3.51 (m, 1H), 7.12 (m, 1H), 7.18 (m, 3H), 7.22 (m, 2H), 7.32 (m, 1H), 7.48 (m, 1H).
A mixture of 4-bromo-3-fluorophenyl acetate (30 g, 0.13 mol) and AlCl3 (34.32 g, 0.26 mol) was stirred at 120-140 for 2 h. The reaction mixture was cooled to 60-80 and ice-water was added and extraction was performed with EtOAc. The organic layer was washed with brine, dried and concentrated to give the residue, which was purified by column chromatography to give 1-(5-bromo-4-fluoro-2-hydroxyphenyl)ethanone (20 g, 67%). 1H-NMR (CDCl3): 2.61 (s, 3H), 6.76 (d, 1H), 7.92 (d, 1H), 12.41 (s, 1H).
In a bottle were combined 1-(5-bromo-4-fluoro-2-hydroxyphenyl)ethanone (8.63 g, 37.15 mmol), benzaldehyde (3.94 g, 37.15 mmol), EtOH (96%, 45 mL) and NaOH (13.08 g, 327 mmol). The mixture was stirred vigorously for 0.5 h. and then filtered. The mixture was poured into HCl (1 N, 50 mL) and filtered. The solid was dried to give 1-(5-bromo-4-fluoro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one (10.8 g, 91%).
1-(5-Bromo-4-fluoro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one (10.8 g, 33.75 mmol) was dissolved in H2O (252 mL) and EtOH (84 mL). Then NaOH (1.35 g, 33.75 mmol) was added. The mixture was stirred overnight and filtered. The cake was dissolved in EtOAc and washed with H2O twice. The organic layer was dried and filtered. The filtrate was concentrated to give 6-bromo-7-fluoro-2-phenylchroman-4-one (5.8 g, 54%). 1H-NMR (CDCl3): 2.85 (m, 1H), 3.04 (m, 1H), 5.43 (m, 1H), 6.78 (m, 1H), 7.37 (m, 5H), 8.07 (m, 1H).
To a solution of 6-bromo-7-fluoro-2-phenylchroman-4-one (400 mg, 1.25 mmol) in DCM (10 mL) was added TiCl4 (2.5 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (0.62 mL, 2.75 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (50 g). The aqueous layer was extracted with CH2Cl2, which was combined with the organic layer. The organic layer was dried and concentrated to give crude N-(6-bromo-7-fluoro-2-phenylchroman-4-ylidene)cyanamide (327 mg, 78%). 1H-NMR (CDCl3): 3.19 (m, 1H), 3.49 (m, 1H), 5.34 (m, 1H), 6.81 (d, 1H), 7.41 (m, 5H), 8.27 (d, 1H).
To a solution of N-methyl-hydroxylamine hydrochloride (35 mg, 0.355 mmol) in MeOH (5 mL) was added MeONa (0.07 mL, 25% (Wt.) in MeOH), followed by N-(6-bromo-7-fluoro-2-phenylchroman-4-ylidene)cyanamide (122 mg, 0.355 mmol). After stirred for 10 minutes, the solvent was removed in vacuo. The residue was purified by preparative TLC to give 6-bromo-7-fluoro-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (30 mg, 30%). 1H-NMR (MeOD): 2.18 (m, 1H), 2.33 (m, 1H), 3.08 (d, 3H), 5.28 (m, 1H), 6.75 (m, 1H), 7.38 (m, 5H), 7.61 (m, 1H).
Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with the amine 117i (52 mg, 0.14 mmol) in [1,4]dioxane (2 mL), Cs2CO3 (2
N, 0.5 mL) and 3-butoxyphenylboronic acid (51 mg, 0.28 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give pure final product (6.50 mg, 10%). 1H-NMR (MeOD): 1.01 (m, 3H), 1.32 (m, 1H), 1.53 (m, 2H), 1.79 (m, 2H), 1.87-2.05 (m, 4H), 2.95 (m, 1H), 3.35 (m, 3H), 3.63 (m, 2H), 3.76-3.87 (m, 2H), 4.04 (m, 2H), 6.87 (m, 1H), 7.12 (m, 3H), 7.35 (m, 1H) 7.50 (m, 0.5H), 7.68 (m, 0.5H), 7.82 (m, 1H).
4-Bromo-phenol (172 g, 1 mol), 4-bromo-butyric acid ethyl ester (212 g, 1.1 mol) and K2CO3 (250 g, 1.8 mol) was dissolved in DMF (1000 mL), the mixture was stirred at room temperature overnight. the solvent was removed and water was added to the residue, the mixture was extracted with ethyl acetate, the organic layer was washed with brine, and dried over Na2SO4 the solvent was removed, to the residue was added NaOH (3M, 1000 mol) and CH3OH (600 mL), the mixture was stirred at 70 for 30 minutes and concentrated, the residue was dissolved in H2O and the mixture was washed with diethylether, the aqueous layer was acidified with HCl, and the mixture was extracted with ethyl acetate, the organic layer was washed with brine, dried over Na2SO4, concentrated to give crude 4-(4-bromophenoxy)butanoic acid (239 g, 98%).
4-(4-Bromophenoxy)butanoic acid (39 g, 25.6 mmol) was dissolved in SOCl2 (100 ml) mixture was heated to refluxed overnight. the mixture was concentrated in vacuo to give 4-(4-bromophenoxy)butanoyl chloride (27.6 g, 67%).
A solution of 4-(4-bromophenoxy)butanoyl chloride (27.6 g, 100 mmol) in DCM (200 mL) was added dropwise to a solution of AlCl3 (50 g, 0.38 mol) in DCM (100 mL) at within 40 minutes, the mixture was stirred at 0 for 1.5 hours, and then stirred at room temperature overnight. the mixture was added to a stirred mixture of concentrated hydrochloric (500 mL) and ice, and then stirred for 1.5 hours. The mixture was extracted with DCM, washed with NaHCO3, dried over Na2SO4 and concentrated to give crude 7-bromo-3,4-dihydrobenz o[b]oxepin-5(2H)-one (25 g, 96%).
To a 7-bromo-3,4-dihydrobenz o[b]oxepin-5(2H)-one (3 g, 12.6 mmol) and triethylamine (10 mL, 18.9 mmol) in DCM (100 mL) was added tert-butyldimethyl(trifluoromethylsulfonyl)silane (3.06 g, 12.4 mmol) dropwise under argon at room temperature, the mixture was stirred for 1 hour at room temperature. The mixture was washed with NaHCO3, dried over Na2SO4, concentrated to give crude (7-bromo-2,3-dihydrobenzo[b]oxepin-5-yloxy)(tert-butyl)dimethylsilane (3.40 g, 81%).
2,4,6-Collidine (5.6 ml), DDQ (9.0 g, 40 mmol) and (7-bromo-2,3-dihydrobenzo[b]oxepin-5-yloxy)(tert-butyl)dimethylsilane was dissolved in toluene, the mixture was stirred for 5.5 hours at room temperature. the mixture was concentrated in vacuo and then purified by column chromatography to give 7-bromobenzo[b]oxepin-5(2H)-one (4.5 g, 94%). 1H-NMR (MeOD): 4.71 (m, 2H), 6.38 (m, 1H), 6.76 (m, 1H), 6.99 (m, 1H), 7.54 (m, 1H), 8.06 (m, 1H).
To a solution of 7-bromobenzo[b]oxepin-5(2H)-one (1.33 g, 5.6 mmol), CuBr—SMe2 (60 mg, 0.3 mmol) and HMPA (2.058 g, 11.5 mmol) in THF (30 mL) was added phenylmagnesium bromide (3.0 M, 3.7 mL) at −78, the mixture was stirred at −78 for 1 hour. The mixture was quenched by HCl (10%, 5 mL), extracted with ethoxyethane, and then washed with NaHCO3, brine, dried over Na2SO4, concentrated and purified by column chromatography to give 7-bromo-3-phenyl-3,4-dihydrobenzo[b]oxepin-5(2H)-one (300 mg, 17%). 1H-NMR(CH2D2): 3.11 (m, 2H), 3.49 (m, 1H), 4.28 (m, 2H), 6.93 (m, 1H), 7.17 (m, 1H), 7.23 (m, 4H), 7.45 (m, 1H), 7.83 (m, 1H)
To a solution of 7-bromo-3-phenyl-3,4-dihydrobenzo[b]oxepin-5(2H)-one (158 mg, 0.5 mmol) in DCM (5 mL) was added TiCl4 (1 mL, 1 M in CH2Cl2) dropwise within 15 minutes at room temperature. After stirring for 1 h, N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (0.25 mL, 1.11 mmol) was added dropwise. The mixture was stirred at room temperature overnight and poured into ice-water (25 g). The aqueous layer was extracted with CH2Cl2, which was combined with the organic layer. The organic layer was dried and concentrated to give crude N-(7-bromo-3-phenyl-3,4-dihydrobenzo[b]oxepin-5(2H)-ylidene)cyanamide (160 mg, 94%).
To a solution of N-methyl-hydroxylamine hydrochloride (42 mg, 0.5 mmol) in MeOH (10 mL) was added MeONa (0.1 mL, 25% (Wt.) in MeOH), followed by N-(7-bromo-3-phenyl-3,4-dihydrobenzo[b]oxepin-5(2H)-ylidene)cyanamide (170 mg, 0.5 mmol). After stirred for 10 minutes, the solvent was removed in vacuo. The residue was purified by preparative TLC to give 6-bromo-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (140 mg, 72%).
Pd(PPh3)2Cl2 (3 mg, 0.003 mmol) in a 10 mL of flask under Ar2 was treated sequentially with 7-bromo-2′-methyl-3-phenyl-3,4-dihydro-2H,2′H-spiro[benzo[b]oxepine-5,5′-[1,2,4]oxadiazol]-3′-amine (77.4 mg, 0.2 mmol) in [1,4]dioxane (2.0 mL), Cs2CO3 (2 N, 1 mL) and 3-cyanophenylboronic acid (58.8 mg, 0.4 mmol) The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 3-(3′-amino-2′-methyl-3-phenyl-3,4-dihydro-2H,2′H-spiro[benzo[b]oxepine-5,5′-[1,2,4]oxadiazole]-7-yl)benzonitrile (20 mg, 24%). 1H-NMR
(MeOD): 2.67 (m, 2H), 3.48 (m, 3H), 3.65 (m, 1H), 3.88 (m, 0.3H), 4.19 (m, 0.7H), 4.50 (d, 1H), 7.23 (m, 6H), 7.66 (m, 3H), 7.81 (m, 1H), 8.02 (m, 3H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with 1 (40 mg, 0.1 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.4 mL) and 3-cyanophenylboronic acid (29 mg, 0.2 mmol). The mixture was heated under microwave at 120 for 30 min. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and then by preparative HPLC to give the target molecule compound 154 (11 mg, 10%). 1H-NMR (MeOD): 1.80 (m, 1H), 2.01 (s, 3H), 2.23 (m, 2H), 2.74 (m, 1H), 3.05 (m, 1H), 3.39 (m, 3H), 3.61 (s, 2H), 3.92 (m, 1H), 4.34 (m, 1H), 7.02 (m, 1H), 7.64 (m, 2H), 7.92 (m, 2H).
A solution of 2,2-dimethyltetrahydro-2H-pyran-4-carbaldehyde (1.858 g, 13.08 mmol), 5′-bromo-2-hydroxy-acetophone (2.813 g, 13.08 mmol) in MeOH (30 mL) containing pyrrolidine (1 mL) was heated to reflux for 2 h. The solvent was removed under reduced pressure, and the residue was dissolved in ethyl acetate, and washed with 1 M NaOH, 1 M HCl, H2O and brine successively, and dried, and filtered. The filtrate was concentrated to dryness. The crude product was further purified by flash chromatography on silica gel (40 g, eluted with ethyl acetate in hexane 0-30%) give 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-one as a brownish solid (2.32 g). MS ESI+ve m/z 339 (M+H)+.
To a solution of crude 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-one (460 mg, 1.36 mmol), 3-cyanophenylboronic acid (299 mg, 2.0 mmol) and Cs2CO3 (866 mg, 2.72 mmol) in 1,4-dioxane (5 mL) and H2O (1 mL) charged in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (50 mg), then the system was degassed by sweeping N2 and capped. Then the mixture was heated to 100° C. for 10 min in a CEM microwave reactor. The solvent was removed under reduced pressure and the residue was purified by flash chromatography on silica gel give (3-(2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-4-oxochroman-6-yl)benzonitrile (251 mg). MS ESI+ve m/z 362 (M+H)+.
To a solution of 3-(2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-4-oxochroman-6-yl)benzonitrile (251 mg, 0.69 mmol) in anhydrous DCM (15 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 1.4 mL, 1.4 mmol) dropwise within 5 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (283 mg, 340 μL 1.52 mmol) dropwise. The resulting mixture was stirred for another 20 h after the addition. The reaction mixture was poured into ice-water (20 g), It was transferred to a separating funnel after stirred for 30. The separated aqueous phase was extracted with DCM (2×20 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give yellowish gel like solid (E)-N-(6-(3-cyanophenyl)-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-ylidene)cyanamide (276 mg), which was used for next step without further purification. MS ESI+ve m/z 386 (M+H)+.
To a solution of methylhydroxylamine HCl salt (58 mg, 0.69 mmol) in anhydrous MeOH (3 mL) was added NaOMe (25 w % in MeOH, 140 μL, 0.62 mmol), 10 min later, followed by a solution of crude (E)-N-(6-(3-cyanophenyl)-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-ylidene)cyanamide obtained in step 3 (276 mg, 0.69 mmol) solution in MeOH (5 mL), After stirred 10 min, the solvent was removed in vacuum. The residue was redissolved in DCM (20 mL) and filtered, and the solvent was removed in vacuum to give crude product, which was purified by preparative HPLC to afford 130 mg of 3-(2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-3′-imino-2′-methylspiro[chroman-4,5′-[1,2,4]oxadiazolidine]-6-yl)benzonitrile TFA salt as a white solid. MS ESI+ve m/z 433 (M+H)+. 1H NMR (400 MHz, CD3OD): 8.00-7.92 (m, 3H), 7.74-7.68 (m, 2H), 7.62 (t, J=7.6 Hz, 1H), 7.05 (d, J=8.4 Hz, 1H), 4.07 (dd, J=12.4, 5.6 Hz, 1H), 3.78 (m, 2H), 3.38, 3.44, 3.43 (s, 3H, several isomers), 2.20 (m, 1H), 2.01 (m, 1H), 1.88 (m, 1H), 1.66 (m, 1H), 1.49-1.32 (m, 2H), 1.29 (s, 3H), 1.26 (m, 3H).
To a 10 mL CEM microwave test tube charged with 6-bromo-2-phenylthiochroman-4-one (344 mg, 1.08 mmol), KCN (150 mg, 2.2 mmol), and (NH4)2CO3 (800 mg, 7.7 mmol) is added formamide (6.5 mL). The resulting mixture is heated in a CEM microwave reactor at 60° C. for 1.5 hrs, 65° C. for 1.5 hrs, then 70° C. for 2 hrs. The resulting mixture is diluted with EtOAc (20 mL) and washed with H2O (3×10 mL). The organic layer is dried over Na2SO4, and solvent is removed in vacuo to give a crude product, which is purified by flash chromatography column (0 to 60% EtOAc/hexane) to give the 6′-bromo-2′-phenylspiro[imidazolidine-4,4′-thiochroman]-2,5-dione (237 mg). MS ESI+ve m/z 389 (M+H)+.
A solution of 6′-bromo-2′-phenylspiro[imidazolidine-4,4′-thiochroman]-2,5-dione (237 mg, 0.61 mmol) and Lawesson's reagent (246 mg, 0.61 mmol) in 1,4-dioxane (3 mL) in a 10 mL CEM microwave test tube is heated in a CEM microwave reactor at 110° C. for 30 min. After cooled to rt, the solvent is removed in vacuo, and the residue is purified by flash chromatography column to give 6′-bromo-2′-phenyl-2-thioxospiro[imidazolidine-4,4′-thiochroman]-5-one (200 mg, 81%). MS ESI+ve m/z 405 (M+H)+.
To a solution of 6′-bromo-2′-phenyl-2-thioxospiro[imidazolidine-4,4′-thiochroman]-5-one (100 mg, 0.25 mmol) in MeOH (2 mL) charged in a 10 mL CEM microwave test tube is added a 0.6 N NaOH aqueous solution (0.5 mL). After stirring at rt for 10 min, MeI (0.5 mL, excess) is added, and the reaction mixture is heated in a CEM microwave reactor at 60° C. for 10 min. In another 10 mL CEM microwave test tube, the same reaction is repeated with the same amounts of starting material, reagents, and solvent. The resulting mixtures are combined, and diluted with ethyl acetate, and washed with H2O and brine successively, dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give the crude product, which is purified by preparative HPLC to give 6′-bromo-1-methyl-2-(methylthio)-2′-phenylspiro[imidazole-4,4′-thiochroman]-5(1H)-one (56 mg) MS ESI+ve m/z 433 (M+H)+.
A suspension of 6′-bromo-1-methyl-2-(methylthio)-2′-phenylspiro[imidazole-4,4′-thiochroman]-5(1H)-one (56 mg, 0.13 mmol) and NH4I (100 mg, excess) in 7 M NH3/MeOH (4 mL) and 1,4-dioxane (1 mL) charged in a 10 mL CEM microwave test tube is heated to 110° C. for 1 h. The solvent is removed in vacuo and the residue is purified by preparative HPLC to give 2-amino-6′-bromo-1-methyl-2′-phenylspiro[imidazole-4,4′-thiochroman]-5(1H)-one as TFA salt. MS ESI+ve m/z 402 (M+H)+.
To a solution of 2-amino-6′-bromo-1-methyl-2′-phenylspiro[imidazole-4,4′-thiochroman]-5(1H)-one TFA salt (70 mg, 0.14 mmol), 3-cyanophenylboronic acid (51 mg, 0.34 mmol), and Cs2CO3 (250 mg) in 1,4-dioxane (4 mL) and H2O (0.5 mL) charged in a 10 mL CEM microwave test tube is added PdCl2(PPh3)2 (20 mg). Then the system is degassed by sweeping with N2. The tube is capped and heated to 110° C. for 30 min in a CEM microwave reactor. Solvent is removed in vacuo and the residue is purified by preparative HPLC to give 3-(2-amino-1-methyl-5-oxo-2′-phenyl-1,5-dihydrospiro-[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile (30 mg) as a TFA salt. MS ESI+ve m/z 425 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.00-7.87 (m, 2H), 7.72-7.59 (m, 3H), 7.52-7.33 (m, 7H), 5.26 and 4.65 (dd and dd, 1H), 3.34 and 3.25 (s and s, 3H), 2.84-2.60 (m, 2H); more polar isomer: 7.99-7.87 (m, 2H), 7.72-7.57 (m, 3H), 7.51-7.33 (m, 7H), 5.30 (dd, 1H), 3.34 and 3.08 (s and s, 3H), 2.82-2.63 (m, 2H).
To a solution of 3-(2-amino-1-methyl-5-oxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile TFA salt (27 mg, 0.05 mmol) in MeOH (5 mL) and
H2O (0.1 mL) is added NaIO4 (21.4 mg, 0.10 mmol). The resulting mixture is stirred overnight at rt, then purified by preparative HPLC to give 3-(2-amino-1-methyl-1′,5-dioxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile TFA salt (16 mg) with 5 mg of recovered starting material. MS ESI+ve m/z 441 (M+H)+.
1H NMR (400 MHz, CD3OD): 8.10-7.41 (m, 12H), 5.20 (dd, 1H), 3.61 (m, 1H), 3.26, 3.25 and 3.11 (s, s and s, 3H), 2.70 (m, 1H).
A crude product of 3-(2-amino-1-methyl-5-oxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile (60 mg, 0.14 mmol) from Suzuki coupling is dissolved in THF (10 mL). To this solution is added TEA (1 mL, excess) and Boc2O (250 mg). The resulting mixture is stirred for 12 h at rt and concentrated. The residue is dissolved in ethyl acetate (15 mL), washed with 1 M HCl and brine successively, and dried over Na2SO4. The solvent is removed in vacuo to give a crude product, which is purified by preparative HPLC to give 3-(N-Boc-2-amino-1-methyl-1′,5-dioxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile. MS ESI+ve m/z 525 (M+H)+.
To a solution of 3-(N-Boc-2-amino-1-methyl-1′,5-dioxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile (5 mg) in DCM (3 mL) at 0° C. is added mCPBA (40 mg, excess). The mixture is stirred for 10 min at 0° C., then it is allowed to warm to rt for 1.5 h. NaHCO3 (40 mg) is added and evaporated to dryness. The residue is dissolved in MeOH, filtered, and purified by preparative HPLC to give 3-(2-amino-1-methyl-1′,1′,5-trioxo-2′-phenyl-1,5-dihydrospiro[imidazole-4,4′-thiochroman]-6′-yl)benzonitrile TFA salt (6 mg). MS ESI+ve m/z 457 (M+H)+.
1H NMR (400 MHz, CD3OD): 8.12-7.42 (m, 12H), 5.20 (dd, 1H), 3.59 (m, 1H), 3.32 and 3.21 (s and s, 3H), 2.83 (m, 1H).
To a solution of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (60 g, 280 mmol) and pyrrolidine (37.8 g, 532 mmol) in methanol (1200 mL) was added cyclohexanone (55 g, 560 mmol), and the mixture was reflux overnight. The solvent was removed in vacuo, and then added H2O and HCl to make the mixture to PH=1, extracted with ethyl acetate. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (90 g, 100%). 1H NMR (CDCl3): 1.49 (d, 4H), 1.64 (d, 4H), 1.83 (s, 1H), 1.98 (d, 2H), 2.11 (t, 1H), 2.31 (s, 1H), 2.68 (s, 1H), 6.87 (d, 1H), 7.50 (d, 1H), 7.92 (s, 1H).
The compound of 2-methylpropane-2-sulfinamide (29.54 g, 244.2 mmol) was added the solution of 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (78.97 g, 268.6 mmol) in dry THF (900 mL), and then tetraisopropoxytitanium (193.1 g, 488.3 mmol) was added, The reaction mixture was reflux overnight. The mixture was removed in vacuo, and then quenched by brine, extracted with ethyl acetate. The ethyl acetate was dried over anhydrous Na2SO4, filtered, and evaporated to give (E)-N-(6-bromospiro[chroman-2,1′-cyclohexane]-4-ylidene)-2-methylpropane-2-sulfinamide (50 g, 40%). 1H NMR (CDCl3): 1.30 (s, 10H), 1.51 (m, 5H), 1.62 (m, 4H), 1.83 (d, 2H), 3.07 (d, 1H), 3.43 (d, 1H), 5.29 (s, 2H), 6.79 (d, 1H), 7.41 (dd, 1H), 7.96 (d, 1H).
To a solution of methyl acetate (1.86 g, 0.025 mol) in THF (18 mL) was added LDA (2 M in THF) was added dropwise via a syring at −78. After stirring at −78 for 30 minutes, a solution of (E)-N-(6-bromospiro[chroman-2,1′-cyclohexane]-4-ylidene)-2-methylpropane-2-sulfonamide (5.0 g, 0.0126 mol) in THF (7.4 mL) was added dropwise via a syring. The mixture was stirring at −78 for 3 h. The reaction was quenched with aqueous NH4Cl solution and allowed to warming to room temperature. The mixture was diluted with water and extracted with EtOAc. The organic layer was dried over Na2SO4, filtered and concentrated to give the product, which was purified by chromatography to afford methyl 2-(6-bromo-4-(1,1-dimethylethylsulfinamido)spiro[chroman-2,1′-cyclohexane]-4-yl)acetate (1.4 g, 33%). 1H NMR (CDCl3): 1.23 (s, 9H), 1.36-1.52 (m, 4H), 1.57 (m, 1H), 1.66 (m, 3H), 1.86 (d, 2H), 2.24 (d, 1H), 2.67 (d, 1H), 2.93 (s, 3H), 3.71 (s, 3H), 5.34 (s, 1H), 6.79 (d, 1H), 7.26 (s, 1H), 7.39 (s, 1H).
To a solution of methyl 2-(6-bromo-4-(1,1-dimethylethylsulfinamido)spiro [chroman-2,1′-cyclohexane]-4-yl)acetate (200 mg, 0.42 mmol) in MeOH (2 mL) was added 4 N HCl/1,4-dioxane (2 mL). After stirring for 30 minutes, the mixture was concentrated. The residue was dissolved in MeOH (1 mL) stirring for 5 minutes and evaporated again to afford methyl 2-(4-amino-6-bromospiro[chroman-2,1′-cyclohexane]-4-yl)acetate (140 mg, 90%). 1H NMR (CDCl3): 1.22-1.38 (m, 1H), 1.39-1.52 (m, 6H), 1.72-1.88 (m, 3H), 1.93-2.02 (d, 2H), 2.13-2.24 (t, 1H), 2.59 (d, 1H), 2.86 (d, 1H), 3.65 (s, 3H), 6.74 (d, 1H), 7.24 (s, 1H), 7.52 (s. 1H).
To a solution of methyl 2-(4-amino-6-bromospiro[chroman-2,1′-cyclohexane]-4-yl)acetate (400 mg, 1.09 mmol), EDCI (226 mg, 1.14 mmol) and DIEA (703 mg, 5.45 mmol) in DMF (4 mL) was added the compound 163ii (207 mg, 1.09 mmol), and the resulting mixture was stirred at room temperature overnight. Water was added and the mixture was extracted with EtOAc. The organic layer was washed with water, brine, dried over Na2SO4, and concentrated to give the crude product, which was purified by preparative TLC to afford the compound 163i (80 mg, 165%). 1H NMR (CDCl3): 1.38 (s, 2H), 1.42 (s, 9H), 1.53 (m, 5H), 1.76 (m, 3H), 1.91 (d, 1H), 2.13 (d, 1H), 2.68 (d, 1H), 3.03 (d, 1H), 3.31 (s, 3H), 6.73 (d, 1H), 7.29 (d, 1H), 7.43 (s, 1H).
Pd(PPh3)2Cl2 (8 mg) in a 10 mL of flask under Ar2 was treated sequentially with the compound 1 (80 mg, 0.16 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (44 mg, 0.24 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and preparative HPLC to give compound 163 (20 mg, 30%). 1H NMR (MeOD): 1.32-1.71 (m, 7H), 1.78-1.91 (m, 2H), 1.98 (m, 1H), 2.12 (d, 1H), 2.44 (d, 1H), 2.93 (d, 1H), 3.38 (s, 3H), 3.68 (d, 1H), 7.09 (d, 1H), 7.62-7.72 (m, 3H), 7.89-8.03 (m, 3H).
A solution of n-BuLi (2.5 M, 3.80 mL) was added to a mixture of PPh3.MeI. (4.092 g, 10.13 mmol) in THF at −10. The mixture was stirred for 1 h at the same temperature, and then 6-bromo-2-phenylchroman-4-one (2 g, 6.62 mmol) was added. The mixture was allowed to warm to room temperature and stirred for 3 h. The resulting mixture was concentrated and purified by column chromatography to give 6-bromo-4-methylene-2-phenylchroman (400 mg, 20%). 1H-NMR (CDCl3): 2.76 (m, 2H), 4.90 (d, 1H), 5.01 (m, 1H), 5.48 (d, 1H), 6.76 (d, 1H), 7.31 (m, 6H), 7.62 (d, 1H).
Pd(PPh3)2Cl2 (40 mg) in a 100 mL of flask under Ar2 was treated sequentially with 6-bromo-4-methylene-2-phenylchroman (200 mg, 0.67 mmol) in [1,4]dioxane (20 mL), Cs2CO3 (2 N, 3.33 mL) and 3-cyanophenylboronic acid (167 mg, 1.13 mmol). The mixture was heated under 120 at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give 3-(4-methylene-2-phenyl-chroman-6-yl)-benzonitrile (110 mg, 51%). 1H-NMR (CDCl3): 2.81 (m, 2H), 4.96 (d, 1H), 5.10 (m, 1H), 5.61 (d, 1H), 7.98 (d, 1H), 7.29 (m, 1H), 7.35 (m, 3H), 7.41 (m, 2H), 7.46 (m, 1H), 7.52 (m, 1H), 7.72 (m, 2H), 7.79 (d, 1H).
To a solution of 3-(4-methylene-2-phenyl-chroman-6-yl)-benzonitrile (50 mg, 0.156 mmol) in CHCl3 (5 mL) was added I2 (93 mg, 0.367 mmol), KSCN (76 mg, 0.78 mmol) and catalyst amount t-BtNBr. The mixture was stirred overnight and used directly.
t-BuNH2 (55 mg, 0.75 mmol) was added to 3-(4-iodomethyl-4-isothiocyanato-2-phenyl- chroman-6-yl)-benzonitrile (190.5 mg, 0.375 mmol) in CHCl3 above and the mixture was stirred for 20 minutes. The solvent was removed in vacuo to give the residue, which was purified by preparative TLC to give 3-(2′-(tert-butylamino)-2-phenyl-5′H-spiro[chroman-4,4′-thiazole]-6-yl)benzonitrile (35 mg, 21%).
A mixture of 3-(2′-(tert-butylamino)-2-phenyl-5′H-spiro[chroman-4,4′-thiazole]-6-yl)benzonitrile (30 mg, 0.066 mmol) in concentrated HCl (5 mL) was stirred at 100 for 2 h. Aqueous NaOH (6 N) was added until pH=8. The mixture was extracted with EtOAc and the organic layer was dried and concentrated to give the residue, which was purified by preparative TLC to give 3-(2′-amino-2-phenyl-5′H-spiro[chroman-4,4′-thiazole]-6-yl)benzamide (20 mg, 73%).
To a solution of 3-(2′-amino-2-phenyl-5′H-spiro[chroman-4,4′-thiazole]-6-yl)benzamide (20 mg, 0.048 mmol) and DIEA (21 mg, 0.096 mmol) in CH2Cl2 was added TFAA (0.2 mL) at 0. The mixture was stirred at room temperature for 1 h and concentrated to give the residue, which was purified by preparative TLC to give 3-(2′-amino-2-phenyl-5′H-spiro[chroman-4,4′-thiazole]-6-yl)benzonitrile (1.53 mg, 8%). 1H-NMR (MeOD): 2.27 (m, 2H), 3.36 (m, 1H), 3.84 (m, 1H), 5.24 (m, 1H), 6.92 (m, 1H), 7.31 (m, 4H), 7.48 (m, 4H), 7.81 (m, 3H).
To a solution of 6-bromo-2-phenylchroman-4-one (2.021 g, 6.67 mmol) in anhydrous THF (35 mL) at −78° C. is added a solution of vinylmagnesiun bromide in THF (1 M, 10 mL, 10 mmol) dropwise within 30 min. The reaction temperature is allowed to warm to rt and stirred for another 2 h. The reaction is chilled to 0° C. and quenched with sat. aq. NH4Cl and extracted with ethyl acetate (2×40 mL). The combined organic phases are washed with H2O, brine, and dried over Na2SO4, and filtered. The filtrate is concentrated and the residue is purified through flash chromatography on silica gel to afford 6-bromo-2-phenyl-4-vinylchroman-4-ol as an oil (1.961 g. 89%). MS ESI+ve m/z 313 (M+H—H2O)+.
The mixture of 6-bromo-2-phenyl-4-vinylchroman-4-ol (345 mg, 1.04 mmol) and thiourea (97 mg, 1.56 mmol) in HOAc (3 mL) and 1 M HCl (1.2 mL) is heated to 40° C. for 12 h. The solvent is removed under reduced pressure to give a white solid as a mixture of 2-(6-bromo-2-phenylchroman-4-ylidene)ethyl carbamimidothioate HCl salt and thiourea.
It is used for next step without purification. MS ESI+ve m/z 313 (M+H-thiourea)+ 389 (weak) (M+H)+.
The above mixture of 2-(6-bromo-2-phenylchroman-4-ylidene)ethyl carbamimidothioate HCl salt and thiourea is dissolved in TFA (4 mL) containing MeSO3H (0.4 mL) and stirred at rt for 1 h. The solvent is removed under reduced pressure. The residue is dissolved in ethyl acetate and washed with sat NaHCO3. The separated aqueous phase is extracted with ethyl acetate once and the combined organic phases are washed with brine, and dried over Na2SO4, and filtered. The filtrate is concentrated to give crude 6-bromo-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazin]-2′-amine, which is used for next step without further purification.
MS ESI+ve m/z 389 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 7.17 (s, 1H), 7.50-6.65 (m 7H), 5.36 and 5.13 (d, 1H), 3.53-1.28 (m, 6H); more polar isomer: 7.41-6.71 (m, 8H), 4.66 and 4.39 (m, 1H), 3.35-2.00 (m, 6H).
The above crude product of 6-bromo-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazin]-2′-amine is dissolved in THF (5 mL). To this solution is added TEA (1 mL) and Boc2O (227 mg, 1.04 mmol). The solution is concentrated after being stirred 2 h at rt. The crude product is purified through flash chromatography on silica gel to afford t-butyl 6-bromo-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazine]-2′-ylcarbamate 415 mg (81% for 3 steps). MS ESI+ve m/z 489 (M+H)+.
A solution of t-butyl 6-bromo-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazine]-2′-ylcarbamate (41 mg, 0.084 mmol), 3-cyanophenylboronic acid (23.5 mg, 0.16 mmol), Cs2CO3 (78 mg, 0.24 mmol), and a catalytic amount of Pd(dppf)Cl2 in 1,4-dioxane (4 mL) and H2O (0.4 mL) is heated at 110° C. in microwave oven for 10 min. Then, 4 mL of 4 M HCl in 1,4-dioxane is added and stirred another 2 h at rt. Water (10 mL) is added and extracted with EA. The separated organic phase is washed with brine, and dried over Na2SO4, and filtered. The filtrate is concentrated to give a crude product which is purified through preparative HPLC to give 3-(2′-amino-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazine]-6-yl)benzonitrile. MS ESI+ve m/z 412 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.03 (s, 1H), 7.96 (m 1H), 7.88 (s, 1H), 7.70-7.60 (m, 3H), 7.53-7.52 (m, 2H), 7.46-7.38 (m, 3H), 7.16 (d, 1H), 5.19 (d, 1H), 3.54 (td, 1H), 3.32 (m, 1H), 2.81 (td, 1H), 2.58 (d, 1H), 2.36-2.27 (m, 2H); more polar isomer: 7.41-6.78 (m, 12H), 4.69 (m, 1H), 3.37-3.24, 3.04-2.88, 3.63, 3.42, 2.29-2.15, 1.28 (m, 6H).
To a solution of t-butyl 6-bromo-2-phenyl-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazine]-2′-ylcarbamate (39 mg, 0.08 mmol), 3-cyanophenylboronic acid (19.7 mg, 0.16 mmol), and Cs2CO3 (120 mg) in 1,4-dioxane (4 mL) and H2O (0.5 mL) charged in a 10 mL CEM microwave test tube is added PdCl2(PPh3)2 (20 mg). The system is degassed by sweeping with N2. The tube is capped and heated to 110° C. for 30 min in a CEM microwave reactor. Solvent is removed in vacuo and the residue is purified by preparative
HPLC to give 2-phenyl-6-(pyridin-3-yl)-5′,6′-dihydrospiro[chroman-4,4′-[1,3]thiazin]-2′-amine (1.7 mg) as a TFA salt. MS ESI+ve m/z 389 (M+H)+.
1H NMR (400 MHz, CD3OD): 8.59 (D, 1H), 8.00-7.15 (m, 11H), 5.22 (d, 1H), 3.56 (m, 1H), 3.26 (m, 1H), 2.82 (td, 1H), 2.60 (dd, 1H), 2.38 (m, 1H), 2.32 (m, 1H).
To a solution of 6-bromo-4′-t-butylspiro[chroman-2,1′-cyclohexan]-4-one (2.155 g, 6.13 mmol) in anhydrous THF (20 mL) at −78° C. is added a solution of vinylmagnesiun bromide in THF (1 M, 9.2 mL, 9.2 mmol) dropwise within 30 min. The reaction temperature is allowed to warm to rt and stirred for another 2 h. The reaction is chilled to 0° C. and quenched with sat. aq. NH4Cl, and extracted with ethyl acetate (2×40 mL). The combined organic phases are washed with H2O and brine, then dried over Na2SO4, and filtered. The filtrate is concentrated and the residue is purified through flash chromatography on silica gel to afford 6-bromo-4′-tert-butyl-4-vinylspiro[chroman-2,1′-cyclohexan]-4-ol as an oil (1.907 g, 82%). MS ESI+ve m/z 361 (M+H—H2O)+.
The mixture of 6-bromo-2-phenyl-4-vinylchroman-4-ol (1.114 g, 2.94 mmol) and thiourea (345 mg, 4.41 mmol) in HOAc (9 mL) and 1 M HCl (3.6 mL) is heated to 40° C. for 12 h. The solvent is removed under reduced pressure to give a white solid as a mixture of 2-(6-bromo-4′-t-butylspiro-[chroman-2,1′-cyclohexane]-4-ylidene)ethyl carbamimidothioate HCl salt and excess thiourea. It is used in the next step without purification. MS ESI+ve m/z 361 (M+H-thiourea)+ 437 (weak) (M+H)+.
The above crude product is dissolved in TFA (8 mL) containing MeSO3H (0.8 mL) and stirred at rt for 1 h. The solvent is removed under reduced pressure. The residue is dissolved in ethyl acetate and washed with sat NaHCO3. The separated aqueous phase is extracted with ethyl acetate once, and the combined organic phases are washed with brine, and dried over Na2SO4, and filtered. The filtrate is concentrated to give crude product.
Pure 6-bromo-5″,6″-dihydrospiro[spiro(chroman-2,1′-(4-t-butylcyclohexan))-4,4″-[1,3]thiazin]-2″-amine is obtained by preparative HPLC. MS ESI+ve m/z 437 (M+H)+.
To a solution of 6-bromo-5″,6″-dihydrospiro[spiro(chroman-2,1″-(4-t-butylcyclohexane))-4,4′-[1,3]thiazin]-2″-amine TFA salt (47 mg, 0.07 mmol) and 3-cyanophenylboronic acid (21 mg, 0.14 mmol) in 1,4-dioxane (3 mL) charged in a 10-mL microwave test tube is added Cs2CO3 (146 mg, 0.45 mmol) and H2O (0.5 mL), followed by a catalytic amount of PdCl2dppf. The system is degassed by sweeping with N2. Then it is capped and heated 10 min at 130° C. in microwave. The separated organic phase is concentrated and then purified through preparative HPLC to afford cis- and trans-3-(2″-amino-5″,6″-dihydrospiro[spiro(chroman-2,1″-(4-t-butylcyclohexane))-4,4′-[1,3]thiazine]-6-yl)benzonitrile respectively. MS ESI+ve m/z 460 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.00 (s, 1H), 7.93 (d, 1H), 7.72 (s, 1H), 7.68-7.58 (m, 3H), 7.06 (d, 1H), 3.53 (td, 1H), 3.28 (m, 1H), 0.91 (s, 9H); more polar isomer: 8.00 (s, 1H), 7.93 (d, 1H), 7.71-7.59 (m, 4H), 7.02 (d, 1H), 3.58 (td, 1H), 3.34 (m, 1H), 0.91 (s, 9H).
To a solution of 6-bromospiro[chroman-2,1′-cyclohexan]-4-one (383 mg, 1.30 mmol) in anhydrous THF (10 mL) at −78° C. is added a solution of vinylmagnesiun bromide in THF (1 M, 1.95 mL, 1.95 mmol) dropwise within 10 min. The reaction temperature is allowed to warm to rt and stirred for another 2 h. The reaction is chilled to 0° C. and quenched with sat. aq. NH4Cl, and extracted with ethyl acetate (2×30 mL). The combined organic phases are washed with H2O, brine, dried over Na2SO4, and filtered. The filtrate is concentrated to give crude 6-bromo-4-vinylspiro[chroman-2,1′-cyclohexan]-4-ol as an oil, which is used for the next step without further purification. MS ESI+ve m/z 305 (M+H—H2O)+.
The mixture of above crude product and thiourea (242 mg, 3.9 mmol) in HOAc (20 mL) and 1 M HCl (4 mL) is heated to 40° C. for 24 h. The solvent is removed under reduced pressure to give a white solid as a mixture of 2-(6-bromo-4′-t-butylspiro[chroman-2,1′-cyclohexane]-4-ylidene)ethyl carbamimidothioate HCl salt and excess thiourea. It is used for the next step without purification. MS ESI+ve m/z 381 (M+H)+.
The above crude product is dissolved in TFA (5 mL) contain MeSO3H (0.5 mL) and stirred at rt overnight. The solvent is removed under reduced pressure. The residue is dissolved in ethyl acetate and washed with sat NaHCO3. The separated aqueous phase is extracted with ethyl acetate once, and the combined organic phases are washed with brine, and dried over Na2SO4, and filtered. The filtrate is concentrated to give crude 6-bromo-5″,6″-dihydrospiro[spiro(chroman-2,1′-cyclohexan)-4,4″-[1,3]thiazin]-2″-amine. Pure product is obtained by preparative HPLC. MS ESI+ve m/z 437 (M+H)+.
To a solution of 6-bromo-5″,6″-dihydrospiro[spiro(chroman-2,1″-(4-t-butylcyclohexane))-4,4′-[1,3]thiazin]-2″-amine TFA salt (70 mg, 0.14 mmol) and 3-cyanophenylboronic acid (41 mg, 0.28 mmol) in 1,4-dioxane (3 mL) charged in a 10-mL microwave test tube is added Cs2CO3 (200 mg, 0.61 mmol) and H2O (0.5 mL), followed by a catalytic amount of PdCl2(PPh3)2. The system is degassed by sweeping with N2. Then it is capped and heated for 30 min at 110° C. in microwave. The separated organic phase is concentrated and the purified through preparative HPLC to afford 3-(2″-amino-5″,6″-dihydrospiro[spiro(chroman-2,1′-cyclohexane)-4,4″-[1,3]thiazine]-6-yl)benzonitrile representatively. MS ESI+ve m/z 460 (M+H)+.
1H NMR (400 MHz, CD3OD): 8.00 (s, 1H), 7.92 (d, 1H), 7.71 (s, 1H), 7.68-7.59 (m, 3H), 7.07 (d, 1H), 3.53 (td, 1H), 3.28 (m, 1H), 2.56 (td, 1H), 2.37-2.29 (m, 2H), 2.18 (d, 1H), 1.90-1.82 (m, 3H), 1.67-1.61 (m, 4H), 1.55-1.37 (m, 3H).
To a solution of 6-bromo-2-phenylchroman-4-one (2.010 g, 6.63 mmol) and 2-methyl-2-propane sulfonamide (804 mg, 6.63 mmol) in anhydrous THF (22 mL) is added Ti(OEt)4 (3.025 g, 2.80 mL, 13.22 mmol). The resulting mixture is heated to reflux for 20 h. Brine (10 mL) is added after the mixture is cooled to rt, and stirred vigorously for 10 min. The mixture is filtered through a pad of Celite, and washed with ethyl acetate (50 mL). The filtrate is washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated. The residue is purified through chromatography on silica gel to afford N-(6-bromo-2-phenylchroman-4-ylidene)-2-methylpropane-2-sulfinamide 1.05 g, 39%) as a light yellow solid. MS ESI+ve m/z 406 (M+H)+.
To a solution of methyl acetate (383 mg, 0.41 mL, 5.17 mmol) in anhydrous THF (10 mL) at −78° C. under N2 atmosphere is added 2 M LDA solution in THF (3.4 mL, 6.8 mmol) dropwise, and the solution is stirred another 30 min at the same temperature after the addition. To this mixture is added TiCl(OiPr)3 (1.681 g, 6.45 mmol) dropwise. The mixture is then stirred another 30 min at −78° C. To this mixture is added a solution of N-(6-bromo-2-phenylchroman-4-ylidene)-2-methylpropane-2-sulfinamide (1.050 g, 2.58 mmol) in anhydrous THF (10 mL) dropwise within 30 min. The reaction mixture is stirred another 3 h at −78° C. then quenched with sat. aq. NH4Cl. The mixture is stirred 10 min after being warmed to rt and filtered through a pad of Celite, and washed with EA (80 mL). The filtrate is transferred to separating funnel and the separated organic phase is washed with brine, and dried over anhydrous Na2SO4, filtered and concentrated, and the residue is purified through chromatography on silica gel to afford methyl 2-(6-bromo-4-(1,1-dimethylethylsulfinamido)-2-phenylchroman-4-yl)acetate 427 mg as an oil. MS ESI+ve m/z 480 (M+H)+.
A solution of methyl 2-(6-bromo-4-(1,1-dimethylethylsulfinamido)-2-phenylchroman-4-yl)acetate (427 mg, 0.89 mmol) in MeOH (7 mL) and 4 M HCl solution in 1,4-dioxane (14 mL) is stirred at rt for 30 min. The solvent is removed under reduced pressure to give 418 mg methyl 2-(4-amino-6-bromo-2-phenylchroman-4-yl)acetate HCl salt as a white foam, which is used for next step without further purification. MS ESI+ve m/z 376 (M+H)+.
The above crude product is added to a solution of NaHCO3 (714 mg, 8.5 mmol) in H2O (10 mL), which is chilled at 0° C. To this stirred mixture was added thiophosgene (71 μL, 107 mg, 0.93 mmol) and the mixture stirred for 1 h at 0° C. The reaction is diluted with DCM and the separated organic phase is washed with semi-saturated brine, dried over anhydrous Na2SO4, filtered, and concentrated to produce methyl 2-(6-bromo-4-isothiocyanato-2-phenylchroman-4-yl)acetate as an oil (384 mg). MS ESI+ve m/z 359 (M-NCS)+.
To a solution of 2-(6-bromo-4-isothiocyanato-2-phenylchroman-4-yl)acetate (192 mg, 0.46 mmol) in DCM (5 mL) is added a solution of 2 M MeNH2 in THF (1.3 mL), and stirred for 1 h. The solvent is removed under reduced pressure and the residue is dissolved in DCM (2 mL) and hexane (2 mL) and evaporated to afford 6-bromo-1′-methyl-2-phenyl-2′-thioxo-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one as a white foam (209 mg), which is used for the next step without further purification. MS ESI+ve m/z 417 (M+H)+.
To a solution of the above crude product in MeOH (9 mL) is added concentrated aqueous NH4OH (4.5 mL), followed by t-butyl hydroperoxide solution (ca. 5.5 M in nonane, 1 mL). The resulting suspension is stirred overnight. The resulting clear solution is concentrated in vacuo and the residue is purified through preparative HPLC to give 6-bromo-2′-imino-1′-methyl-2-phenyl-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one TFA salt. MS ESI+ve m/z 400 (M+H)+.
To a solution of 6-bromo-2′-imino-1′-methyl-2-phenyl-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one TFA salt (20 mg, 0.039 mmol) and 3-cyanophenylboronic acid (12 mg, 0.078 mmol) in 1,4-dioxane (3 mL) charged in a 10-mL microwave test tube is added Cs2CO3 (63 mg, 0.195 mmol) and H2O (0.5 mL), followed by Pd(PPh3)2Cl2 (8 mg). The resulting mixture is heated 30 min at 130° C. in microwave. The separated organic phase is concentrated and then purified through preparative HPLC to afford cis- and trans-3-(2′-imino-1′-methyl-6′-oxo-2-phenyl-2′,3′,5′,6′-tetrahydro-1′-spiro[chroman-4,4′-pyrimidine]-6-yl)benzonitrile. MS ESI+ve m/z 423 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.02 (s, 1H), 7.97-7.88 (m, 2H), 7.71-7.60 (m, 3H), 7.52-7.49 (m, 2H), 7.44-7.37 (m, 3H), 7.15 and 7.10 (d and d, 1H), 5.34 and 5.17 (d and d, 1H), 3.90 and 2.90 (d and d, 1H), 3.57 (m, 1H), 3.35 (s, 3H), 2.54 (t, 1H), 2.34 (m, 1H); more polar isomer: 8.02 (s, 1H), 7.99-7.91 (m, 2H), 7.70-7.60 (m, 3H), 7.53-7.49 (m, 2H), 7.44-7.35 (m, 3H), 7.15 and 7.09 (d and d, 1H), 5.36 and 5.23 (dd and d, 1H), 3.84 and 2.73 (d and d, 1H), 3.44 (m, 1H), 3.00 and 2.94 (s and s, 3H).
To a solution of 6-bromo-2′-imino-1′-methyl-2-phenyl-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one TFA salt (12 mg, 0.023 mmol) and pyridin-3-ylboronic acid (9 mg, 0.070 mmol) in 1,4-dioxane (3 mL) charged in a 10-mL microwave test tube is added Cs2CO3 (63 mg, 0.195 mmol) and H2O (0.5 mL), followed by
Pd(PPh3)2Cl2 (8 mg). The resulting mixture is heated for 30 min at 130° C. in CEM microwave reactor. The separated organic phase is concentrated and the purified through preparative HPLC to afford cis- and trans-2′-imino-1′-methyl-2-phenyl-6-(pyridin-3-yl)-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one. MS ESI+ve m/z 423 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.70 (m, 2H), 8.08 (s, 1H), 8.00 (s, 1H), 7.78 (m, 2H), 7.52-7.37 (m, 5H), 7.18 (m, 1H), 5.37 and 5.20 (d and d, 1H), 3.90 and 2.91 (d and d, 1H), 3.35 (s, 3H), 2.60-2.29 (m, 2H); more polar isomer: 9.16 (s, 1H), 8.82-8.73 (m, 2H), 8.15-8.04 (m, 2H), 7.80 (m, 1H), 7.51-7.35 (m, 5H), 7.22 and 7.17 (d and d, 1H), 5.39 and 5.27 (d and d, 1H), 3.86 and 2.76 (d and d, 1H), 3.46 (s, 1H), 2.99 and 2.94 (s and s, 3H), 2.57-2.31 (m, 2H).
To a solution of 6-bromo-2′-imino-1′-methyl-2-phenyl-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one TFA salt (12 mg, 0.023 mmol) and pyridin-4-ylboronic acid (9 mg, 0.070 mmol) in 1,4-dioxane (3 mL) charged in a 10-mL microwave test tube is added Cs2CO3 (63 mg, 0.195 mmol) and H2O (0.5 mL), followed by Pd(PPh3)2Cl2 (8 mg). The resulting mixture is heated for 30 min at 130° C. in CEM microwave reactor. The separated organic phase is concentrated and then purified through preparative HPLC to afford cis- and trans-2′-imino-1′-methyl-2-phenyl-6-(pyridin-4-yl)-2′,3′-dihydro-1′H-spiro[chroman-4,4′-pyrimidin]-6′(5′H)-one. MS ESI+ve m/z 423 (M+H)+.
1H NMR (400 MHz, CD3OD): less polar isomer: 8.80 (m, 2H), 8.35-8.24 (m, 3H), 7.51-7.40 (m, 5H), 7.23 (m, 1H), 5.43 and 5.24 (d and d, 1H), 3.95 and 2.94 (d and d, 1H), 3.56 (m, 1H), 3.36 (s, 3H), 2.60-2.35 (m, 2H); more polar isomer: 8.81 (d, 2H), 8.41-8.31 (m, 3H), 8.02 (m, 1H), 7.54-7.51 (m, 2H), 7.46-7.37 (m, 3H), 7.27 and 7.22 (d and d, 1H), 5.45 and 5.32 (d and d, 1H), 3.92 and 2.79 (d and d, 1H), 3.47 (s, 1H), 3.00 and 2.96 (s and s, 3H), 2.56-2.34 (m, 2H).
To a solution of methylhydrazine H2SO4 salt (144 mg, 1.0 mmol) in anhydrous MeOH (8 mL) was added NaOMe (25 w % in MeOH, 0.46 mL, 2.0 mmol), 1 h later, followed by (E)-N-(6-bromospiro[chroman-2,1′-cyclohexane]-4-ylidene)cyanamide (319 mg, 1.0 mmol), After stirred 20 min, the solvent was removed in vacuum. The residue was redissolved in DCM (20 mL) and filtered, and the solvent was removed in vacuum to give crude product.
It was purified on preparative HPLC to 6-bromo-2″-methylspiro[spiro(chroman-2,1′-cyclohexane)-4,5″-[1,2,4]-triazolidine]-3″-imine TFA salt as a white solid. MS ESI+ve m/z 365 (M+H)+.
To a solution of 1-(5-bromo-2-hydroxyphenyl)ethanone (6.069 g, 28.23 mmol) and tetrahydro-2H-pyran-3-carbaldehyde (3.218 g, 28.23 mmol) in MeOH (50 mL) was added pyrrolidine (1.5 mL). The resulting solution was heated to reflux and monitored with LC-MS. 50% conversion was achieved after 2 h. After 12 h, there was no improvement in conversion. The reaction mixture was cooled down to room temperature and the solvent was removed under reduced pressure. The residue was purified by flash chromatography on silica gel and eluted with EA in hexane (0-30%) to produce 1.981 g of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one. 1.321 g of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)chroman-4-one was further purified by preparative HPLC to give (S/R)-6-bromo-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-one (A) (669 mg, polar isomer on preparative HPLC) and (S/R)-6-bromo-2-((R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-one (B)(512 mg, less polar isomer on preparative HPLC). MS ESI+ve m/z 311 (M+H)+.
To a 10 mL CEM microwave test tube was charged with Cs2CO3 (600 mg, 1.84 mmol), PdCl2(PPh3)2 (42 mg, 0.06 mmol), (S/R)-6-bromo-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-one (285.5 mg, 0.92 mmol), 3,5-difluorophenylboronic acid (232 mg, 1.47 mmol), dioxane (5 mL) and H2O (0.5 mL), the system was swept with N2 and capped, and heated in a CEM microwave reactor at 100 C for 8 min. In another tube charged with the same amount of reagents and starting material, repeated the same reaction at the same temperature and reaction time. The combined reaction mixtures were evaporated. The residue was dissolved in MeOH and filtered. The filtrate was evaporated and purified by flash chromatography on silica gel and eluted with EA in hexane (0-40%) to give (S/R)-6-bromo-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-one (520 mg). 1H NMR (400 MHz, CDCl3) δ: 8.06 (d, J=2.4 Hz, 1H), 7.67 (dd, J=8.8, 2.4, 1H), 7.11-7.06 (m, 3H), 6.77 (m, 1H), 4.34 (m, 1H), 4.22 (m, 1H), 3.91 (m, 1H), 3.47-3.41 (m, 2H), 2.82-2.69 (m, 2H), 2.10 (m, 1H), 1.88 (m, 1H), 1.71-1.65 (m, 2H), 1.41 (m, 1H); 19F NMR (375 Hz, CDCl3) δ: −109.82; MS ESI+ve m/z 345 (M+H)+.
To a solution of (S/R)-6-bromo-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-one (509 mg, 1.52 mmol) in anhydrous DCM (15 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 4 mL, 4 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.623 g, 0.75 mL, 3.34 mmol) dropwise. The resulting mixture was stirred overnight after the addition. The reaction mixture was poured into ice-water (35 g), and stirred for 10 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 2 times with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give N—((S/R)-6-(3,5-difluorophenyl)-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-ylidene)cyanamide as light brown solid (580 mg), which was used for next step without further purification. MS ESI+ve m/z 369 (M+H)+.
To a solution of N-methylhydroxylamine hydrochloride (129 mg, 1.54 mmol) in MeOH (10 mL) was added 25 wt % NaOMe in MeOH (0.32 mL, 1.39 mmol). The resulting mixture was stirred 5 min and transferred through a syringe to a suspension of N—((S/R)-6-(3,5-difluorophenyl)-2-((S/R)-tetrahydro-2H-pyran-3-yl)chroman-4-ylidene)cyanamide
(crude from previous step, 1.52 mmol) in MeOH (8 mL). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was taken in hexane and filtered, the cake was collected and purified by preparative PHLC to gave (2S,4S/2R,4R)-6-(3,5-difluorophenyl)-2′-methyl-2-((S/R)-tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine as TFA salt and (2S,4R/2R,4S)-6-(3,5-difluorophenyl)-2′-methyl-2-((S/R)-tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine as TFA salt.
Compound 326: 1H NMR (400 MHz, CD3OD) δ: 7.93 (d, J=2.0 Hz, 1H), 7.69 (td, J=8.4, 2.4 Hz, 1H), 7.26-7.22 (m, 2H), 7.01 (m, 1H), 6.91 (m, 1H), 4.22-4.14 (m, 2H), 3.88 (m, 1H), 3.45 (m, 2H), 3.43 (s, 3H), 2.60 (dd, J=10.0, 2.8 Hz, 1H), 2.45 (dd, J=14.0, 10.0 Hz, 1H), 2.07-1.93 (m, 2H), 1.70-1.50 (m, 3H); 19F NMR (375 Hz, CD3OD) δ: −111.95; MS ESI+ve m/z 416 (M+H)+.
Compound 322: 1H NMR (400 MHz, CD3OD) δ: 7.93 (d, J=2.0 Hz, 1H), 7.70 (dd, J=8.8, 2.4 Hz, 1H), 7.28-7.23 (m, 2H), 7.02 (d, J=8.8 Hz, 1H), 6.93 (m, 1H), 4.22-4.17 (m, 2H), 3.89 (brd, J=11.2 Hz, 1H), 3.50-3.43 (m, 2H), 3.37 (s, 3H), 2.75 (dd, J=14.0, 2.4
Hz, 1H), 2.03-1.72 (m, 3H), 1.72-1.66 (m, 2H), 1.55 (m, 1H); 19F NMR (375 Hz, CD3OD) δ: −111.95; MS ESI+ve m/z 416 (M+H)+.
To a solution of CH3OCH2PPh3Cl (171.4 g, 0.5 mol) in THF (1000 mL), was added NaH (20.4 g, 0.51 mol, 60%) at room temperature, and the solution was stirred at room temperature for 15 minutes. A solution of compound 210a (65.73 g, 0.45 mol) in THF was added at room temperature, after being stirred for 30 minutes, the reaction mixture was refluxed for 6 hours. Ethanol was added, the mixture was extracted with EtOAc. The organic phase was dried over Na2SO4, filtered, and evaporated under reduced pressure, and purified by column chromatography to give the compound 210b (49.85 g, 64%). 1H-NMR (CDCl3 400 MHz): δ7.27-7.29 (m, 1H), 7.23-7.25 (m, 1H), 7.02 (m, 1H), 6.98-7.00 (m, 2H), 6.54 (s, 1H), 3.65 (s, 3H), 3.64 (s, 1H), 2.63-2.67 (m, 2H), 2.42-2.45 (m, 2H), 1.67-1.73 (m, 2H).
To a solution of compound 210b (30 g, 0.172 mol) in CH3OH (300 mL) was added aqueous HCl solution (1500 mL, 2 mol/L). The reaction mixture was refluxed overnight, evaporate in vacuo, extracted with diethyl ether, dried over Na2SO4, and evaporated to give the crude compound 210c (21 g, 76%), which was used for the next step without purification. 1H-NMR (CDCl3 400 MHz): δ9.60 (m, 1H), 7.14-7.19 (m, 2H), 7.08-7.13 (m, 2H), 3.52 (s, 1H), 2.11-2.19 (m, 1H), 1.85-1.87 (m, 1H), 1.68-1.75 (m, 2H).
To a stirred solution of compound 210A (28.1 g, 0.131 mol) in a mixture of EtOH (128 mL) and water (211 mL) was added compound 210c (21 g, 0.131 mol) and borax (49.9 g, 0.131 mol). The mixture was refluxed for 2 days, filtrates, and dissolved in CH2Cl2. After filtration and evaporation, the crude product was purified by HPLC preparation to give the compound 210d (11.5 g, 25%). 1H-NMR (CDCl3 300 MHz): δ7.90-7.91 (m, 1H), 7.46-7.51 (m, 1H), 7.11-7.19 (m, 1H), 7.04-7.09 (m, 3H), 6.81-6.86 (m, 1H), 4.58-4.79 (m, 1H), 3.32-3.48 (m, 1H), 2.66-2.79 (m, 3H), 2.47-2.62 (m, 1H), 1.96-2.06 (m, 1H), 1.75-1.95 (m, 2H), 1.68-1.74 (m, 1H).
A steel slave was charged with a mixture of compound 210d (6 g, 16.85 mmol), KCN (2.19 g, 33.7 mmol) and (NH4)2CO3 (11.81 g, 123 mmol). Formamide (200 mL) was added. The mixture was heated at 70° C. for 72 hours, cooled, and poured into ice. After acidification with concentrated HCl solution to pH=1, the mixture was filtered, and the solid was dissovled in CH2Cl2 (500 mL). The organic layer was washed with water (2×500 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by column chromatography (DCM/MeOH=50:1) to give the compound 210e (7 g, 97%) as orange solid. 1H-NMR (CDCl3 400 MHz): δ7.40 (m, 2H), 7.13 (m, 4H), 6.83 (m, 1H), 5.1 (d, J=12.0 Hz, 1H), 3.2 (m, 1H), 2.70 (m, 1H), 2.65 (m, 4H), 1.70 (m, 2H), 1.65 (m, 1H).
To solution of compound 210e (0.4 g, 0.94 mmol) and Lawesson' reagent (0.38 g, 0.94 mmol) in dioxane (20 mL) was heated under 150° C. for 25 minutes in a microwave reactor. The mixture was cooled, and concentrated in vacuo. The residue was purified by column chromatography (PE/EtOAc=20:1) to give the compound 210f (0.15 g, 36%) as a light orange solid. 1H-NMR (CDCl3 400 MHz): δ7.31 (d, J=4.0 Hz, 1H), 7.12 (s, 1H), 7.05 (m, 3H), 6.95 (d, J=20.0 Hz, 1H), 6.76 (m, 1H), 4.95 (m, 1H), 3.22 (m, 1H), 2.65 (s, 2H), 2.05 (m, 2H), 1.90 (m, 2H), 1.70 (m, 1H), 1.55 (s, 1H).
To a solution of compound 210f (100 mg, 0.226 mmol) in CH3CN (2 mL) was added K2CO3 (125 mg, 0.904 mmol) and MeI (128 mg, 0.904 mmol). The mixture was stirred at room temperature for 3 hours. The solution was filtered, and the filtrate was concentrated in vacuo. The residue was purified by preparative TLC (PE:EtOAc=3:1) to give the compound 210g (74 mg, 70%) as a white solid. 1H-NMR (CDCl3 400 MHz): δ7.25 (d, J=8.0 Hz, 1H), 7.15 (d, J=8.0 Hz, 1H), 7.04 (m, 3H), 6.72 (m, 1H), 5.05 (m, 1H), 3.17 (m, 1H), 2.97 (s, 1H), 2.75 (m, 2H), 2.56 (s, 3H), 2.46 (d, J=12.0 Hz, 2H), 2.22 (m, 1H), 1.95 (m, 2H), 1.82 (m, 1H), 1.65 (m, 2H).
A solution of compound 210g (50 mg, 0.106 mmol) and NH4I (123 mg, 0.851 mmol) in a solution of NH3/EtOH (5 mL, 0.5 N) was heated at 120° C. in a CEM tube under microwave reactor for 3 hours. The mixture was concentrated in vacuo, and the residue was added CH2Cl2 (20 mL) and filtered. The filtrate was concentrated in vacuo, and the residue was purified by preparative TLC (CH2Cl2: MeOH=10:1) to give the compound 210h (36 mg, 77%) as yellow oil. 1H-NMR (CDCl3 400 MHz): δ7.19 (d, J=4.0 Hz, 2H), 7.02 (m, 4H), 6.78 (m, 1H), 5.23 (m, 1H), 3.09 (m, 1H), 3.02 (s, 3H), 2.67 (m, 3H), 2.20 (m, 1H), 1.90 (m, 3H), 1.76 (m, 2H).
To a solution of compound 210g (30 mg, 0.068 mmol), 3,5-dichlorophenylboronic acid (16 mg, 0.082 mmol), and Cs2CO3 (0.5 mL, 6 mmol, 2 M, aqueous) in dioxane (1.5 mL) was added Pd(PPh3)2Cl2 (5 mg). The mixture was heated at 120° C. in a microwave reactor for 15 minutes under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated in vacuo. The residue was purified by preparative TLC (CH2Cl2: MeOH=10:1) and HPLC to give the compound 210 (4 mg, 12%) as a solid. 1HNMR (CD3OD 400 MHz): δ7.49 (m, 3H), 7.45 (d, J=12.0 Hz, 1H), 7.38 (m, 2H), 7.05 (m, 3H), 6.92 (d, J=8.0 Hz, 1H), 5.05 (m, 1H), 3.22 (s, 3H), 2.70 (m, 2H), 2.56 (s, 1H), 2.35 (d, J=12.0 Hz, 1H), 2.24 (m, 1H), 1.96 (m, 2H), 1.68 (m, 1H), 1.19 (s, 1H); ESI MS: 506 [M+H]+.
To a 10 mL CEM microwave test tube was charged with Cs2CO3 (391 mg, 1.20 mmol), PdCl2(PPh3)2 (30 mg, 0.04 mmol), (S/R)-6-bromo-2-((R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-one (185.7 mg, 0.60 mmol), 3,5-difluorophenylboronic acid (142 mg, 0.90 mmol), dioxane (3 mL) and H2O (0.3 mL), the system was swept with N2 and capped, and heated in a CEM microwave reactor at 100 C for 8 min. Another tube charged with the same amount of reagents and starting material was repeated the same reaction at the same temperature and reaction time. Combined the reaction mixture and evaporated. The residue was dissolved in MeOH and filtered. The filtrate was evaporated and purified by flash chromatography on silica gel and eluted with EA in hexane (0-40%) to give (S/R)-6-(3,5-difluorophenyl)-2-(R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-one (281 mg). 1H NMR (400 MHz, CDCl3) δ: 8.07 (s, 1H), 7.68 (dd, J=8.4, 2.0, 1H), 7.09-7.06 (m, 3H), 6.77 (m, 1H), 4.38 (m, 1H), 3.97-3.90 (m, 2H), 3.52-3.43 (m, 2H), 2.84-2.65 (m, 2H), 2.05 (m, 2H), 1.73-1.61 (m, 4H); 19F NMR (375 Hz, CDCl3) δ: −109.82; MS ESI+ve m/z 345 (M+H)+.
To a solution of (S/R)-6-(3,5-difluorophenyl)-2-(R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-one (273 mg, 0.82 mmol) in anhydrous DCM (10 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 2.1 mL, 2.1 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.336 g, 0.40 mL, 3.34 mmol) dropwise. The resulting mixture was stirred overnight after the addition. The reaction mixture was poured into ice-water (35 g), and stirred for 10 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted twice with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give N—((S/R)-6-(3,5-difluorophenyl)-2-((R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-ylidene)cyanamide as light brown solid (100% yield), which was used for next step without further purification. MS ESI+ve m/z 369 (M+H)+.
To a solution of N-methylhydroxylamine hydrochloride (71 mg, 0.85 mmol) in MeOH (4 mL) was added 25 wt % NaOMe in MeOH (0.17 mL, 0.75 mmol). The resulting mixture was stirred 5 min and then transferred through a syringe to a suspension of above crude product in MeOH (8 mL). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to gave compound 323 (2S,4S/2R,4R)-6-(3,5-difluorophenyl)-2′-methyl-2-4R/S)-tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine and compound 316 (2S,4R/2R,4S)-6-(3,5-difluorophenyl)-2′-methyl-2-((R/S)-tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine.
Compound 323: 1H NMR (400 MHz, CD3OD) δ: 7.93 (d, J=2.4 Hz, 1H), 7.67 (td, J=8.8, 2.4 Hz, 1H), 7.26-7.22 (m, 2H), 7.01 (d, J=8.8 Hz, 1H), 6.90 (m, 1H), 4.24 (m, 1H), 3.958 (m, 1H), 3.86 (m, 1H), 3.53-3.46 (m, 2H), 3.44 (s, 3H), 2.57 (dd, J=14.0, 2.4 Hz, 1H), 2.41 (dd, J=14.0, 10.8 Hz, 1H), 2.04-2.02 (m, 2H), 1.74-1.63 (m, 3H); 19F NMR (375 Hz, CD3OD) δ: −111.92; MS ESI+ve m/z 416 (M+H)+.
Compound 316: 1H NMR (400 MHz, CD3OD) δ: 7.93 (d, J=2.4 Hz, 1H), 7.70 (dd, J=8.4, 2.0 Hz, 1H), 7.26-7.24 (m, 2H), 7.01 (d, J=8.4 Hz, 1H), 6.91 (m, 1H), 4.24 (m, 1H), 3.97 (m, 1H), 3.89 (m, 1H), 3.57-3.43 (m, 2H), 3.37 (s, 3H), 2.65 (dd, J=14.4, 2.4 Hz, 1H), 2.08-1.95 (m, 3H), 1.73-1.64 (m, 3H); 19F NMR (375 Hz, CD3OD) δ: −111.95; MS ESI+ve m/z 416 (M+H)+.
To a solution of ethyl 2-(tetrahydrofuran-2-yl)acetate (3.051 g, 19.29 mmol) in anhydrous THF (50 mL) chilled to 0° C. was added 1 M LAH/THF solution (14.5 mL, 14.5 mmol) dropwise. The resulting mixture was stirred for another 30 min after the addition. Na2SO4. 10 H2O (18 g) was added slowly to quench the reaction at 0° C. The reaction mixture was stirred for another 1 h at room temperature and filtered through a short pad of Celite and washed with THF. The filtrate was dried over anhydrous Na2SO4, and filtered, and concentrated to give 1.85 g of 2-(tetrahydrofuran-2-yl)ethanol, which was used for next step without further purification.
To a solution of oxalyl chloride (3.666 g, 2.52 mL, 28.88 mmol) in anhydrous DCM (60 mL) at −78° C. was added a solution of DMSO (3.761 g, 3.42 mL, 48.14 mmol) in anhydrous DCM (10 mL) through a pressure equalizing addition funnel in such a rate maintaining reaction temperature below −72° C. The reaction was stirred another 30 min after the addition. Then, a solution of 2-(tetrahydrofuran-2-yl)ethanol (2.792 g, 24.07 mmol) in DCM (30 mL) was added in such a rate maintaining the reaction temperature below −70° C. The reaction was stirred another 30 min after the addition, then TEA (12.167 g, 16.76 mL, 120.35 mmol) is added at −78° C. The reaction temperature was allowed to warm to room temperature slowly without removing dry ice-acetone bath and stirred overnight. The reaction mixture was washed with H2O (100 mL), 1 M HCl (2×150 mL), H2O (100 mL), brine (100 mL) successively, then, dried over anhydrous Na2SO4, and filtered, and concentrated to give 2.1 g of 2-(tetrahydrofuran-2-yl)acetaldehyde. It was used for next step without further purification.
The solution of 2-Acetyl-4-bromophenol (1.754 g, 8.16 mmol), 2-(tetrahydrofuran-2-yl)acetaldehyde (2.1 g) and purrolidine (0.4 mL) in MeOH was heated to reflux for 2 h. The reaction mixture was cool down to room temperature and evaporated. The residue was dissolved in EA, washed with 1 M HCl, 1 M NaOH (2×50 mL), brine (100 mL) successively, then, dried over anhydrous Na2SO4, and filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%) to give 6-bromo-2-((tetrahydrofuran-2-yl)methyl)chroman-4-one (464 mg); MS ESI+ve m/z 311 (M+H)+.
To a 10 mL CEM microwave test tube was charged with Cs2CO3 (971 mg, 2.98 mmol), PdCl2(PPh3)2 (52.2 mg, 0.075 mmol), (S/R)-6-bromo-2-((R/S)-tetrahydro-2H-pyran-3-yl)chroman-4-one (464 mg, 1.49 mmol), 3-cyanophenylboronic acid (329 mg, 2.24 mmol), dioxane (4 mL) and H2O (0.4 mL), the system was swept with N2 and capped, and heated in a CEM microwave reactor at 100° C. for 10 min. Due to incompletion of the reaction, PdCl2(PPh3)2 (10 mg) and 3-cyanophenylboronic acid (100 mg) was added and heated for another 10 min at 100° C. The reaction mixture was diluted with EA, washed with brine, dried over anhydrous Na2SO4, and filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%) to give 3-(4-oxo-2-((tetrahydrofuran-2-yl)methyl)chroman-6-yl)benzonitrile (233 mg). MS ESI+ve m/z 334 (M+H)+.
To a solution of 3-(4-oxo-2-((tetrahydrofuran-2-yl)methyl)chroman-6-yl)benzonitrile (233 mg, 0.70 mmol) in anhydrous DCM (18 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 1.4 mL, 1.4 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.287 g, 0.35 mL, 1.54 mmol) dropwise. The resulting mixture was stirred overnight after the addition. The reaction mixture was poured into ice-water (25 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted twice with DCM (2×30 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give N-(6-(3-cyanophenyl)-2-((tetrahydrofuran-2-yl)methyl)chroman-4-ylidene)cyanamide as light brown solid, which was used for next step without further purification. MS ESI+ve m/z 358 (M+H)+.
To a solution of N-methylhydroxylamine hydrochloride (58.5 mg, 0.70 mmol) in MeOH (4 mL) was added 25 wt % NaOMe in MeOH (0.14 mL, 0.63 mmol). The resulting mixture was stirred 5 min and then transferred through a syringe to a suspension of above crude product MeOH (4 mL). The mixture was stirred at room temperature for 10 min Solvent was removed under reduced pressure. The residue was purified by preparative
PHLC to gave 3 isomers of 3-(3′-amino-2′-methyl-2-((tetrahydrofuran-2-yl)methyl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-6-yl)benzonitrile as TFA salt.
Compound 360: 1H NMR (400 MHz, CD3OD) δ: 7.99-7.96 (m, 2H), 7.92 (d, J=8.0 Hz, 1H), 7.71-7.68 (m, 2H), 7.61 (t, J=8.0 Hz, 1H), 7.03 (d, J=8.0 Hz, 1H), 4.51 (m, 1H), 4.21 (m, 1H), 3.87 (m, 1H), 3.77 (m, 1H), 3.43 (s, 3H), 2.66 (dd, J=14.0, 2.4 Hz, 1H), 2.36 (dd, J=14.0, 2.8 Hz, 1H), 2.15-1.81 (m, 5H), 1.58 (m, 1H); MS ESI+ve m/z 405 (M+H)+.
Compound 367: 1H NMR (400 MHz, CD3OD) δ: 8.00-7.91 (m, 3H), 7.79-7.68 (m, 2H), 7.62 (t, J=8.0 Hz, 1H), 7.03 (t, J=8.0 Hz, 1H), 4.49 (m, 1H), 4.23/4.11 (m, 1H), 3.88 (m, 1H), 3.76 (m, 1H), 3.43/3.38 (s, 3H), 2.78-2.39 (m, 2H), 2.16-1.62 (m, 5H), 1.61 (m, 1H); MS ESI+ve m/z 405 (M+H)+.
Compound 366: (most polar, major): 1H NMR (400 MHz, CD3OD) δ: 7.99-7.91 (m, 3H), 7.72-7.67 (m, 2H), 7.61 (t, J=8.0 Hz, 1H), 7.03 (d, J=8.0 Hz, 1H), 4.45 (m, 1H), 4.23/4.15 (m, 1H), 3.89 (m, 1H), 3.77 (m, 1H), 3.38 (s, 3H), 2.76 (d, J=10.4 Hz, 1H), 2.17-1.83 (m, 6H), 1.528 (m, 1H); MS ESI+ve m/z 405 (M+H)+.
To a solution of 3-((2S,6′R//2R,6′S)-6′-methyl-4-oxo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-6-yl)benzonitrile (37.4 mg, 0.11 mmol) in anhydrous DCM (5 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.22 mL, 0.22 mmol) dropwise within 5 min at room temperature. The mixture was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.45 mg, 0.054 mL, 0.24 mmol) dropwise. The resulting mixture was stirred overnight after the addition. The reaction mixture was poured into ice-water (5 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted twice with DCM (2×10 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give N-((2S,6′R/2R,6′S)-6-(3-cyanophenyl)-6′-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide as light brown solid, which was used for next step without further purification. MS ESI+ve m/z 358 (M+H)+.
To a solution of N-methylhydroxylamine hydrochloride (623 mg, 7.46 mmol) in MeOH (10 mL) was added 25 wt % NaOMe in MeOH (1.54 mL, 6.71 mmol). The resulting mixture was stirred 5 min and then diluted with MeOH to total volume 20 mL. 0.295 mL of this solution was added to a suspension of above crude product MeOH (3 mL). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to gave 3-(3″-amino-2″-methyl-4″,5″-dihydro-2″H-spiro(spiro(chroman-2,3′-[(2S,6R/2R,6S)-2,4,5,6-tetrahydro-6-methyl-pyran])-4,5″-[1,2,4]oxadiazole)-6-yl)benzonitrile as TFA salt. 1H NMR (400 MHz, CD3OD) 8: 1H NMR (400 MHz, CD3OD) δ: 7.88 (s, 1H), 7.84 (d, J=8.0 Hz, 1H), 7.79 (dd, J=7.6, 2.4 Hz, 1H), 7.68-7.56 (m, 3H), 7.10 (m, 1H), 4.20 (dd, J=12.8, 2.0 Hz, 0.5H), 3.91 (dd, J=12.4, 2.4 Hz, 0.5H), 3.59-3.41 (m, 2H), 3.53 (s, 1.5H), 3.34 (s, 1.5H), 2.80-1.48 (m, 6H), 1.23 (d, J=6.4 Hz, 1.5H), 1.21 (d, J=6.4 Hz, 1.5H); MS ESI+ve m/z 405 (M+H)+.
To a solution of 3-((2R,6′R//2S,6′S)-6′-methyl-4-oxo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-6-yl)benzonitrile (37.4 mg, 0.11 mmol) in anhydrous DCM (5 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.22 mL, 0.22 mmol) dropwise within 5 min at room temperature. The mixture was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.45 mg, 0.054 mL, 0.24 mmol) dropwise. The resulting mixture was stirred overnight after the addition. The reaction mixture was poured into ice-water (5 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted twice with DCM (2×10 mL). The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give N-((2R,6′R/25,6′S)-6-(3-cyanophenyl)-6′-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylidene)cyanamide as light brown solid, which was used for next step without further purification. MS ESI+ve m/z 358 (M+H)+.
To a solution of N-methylhydroxylamine hydrochloride (623 mg, 7.46 mmol) in MeOH (10 mL) was added 25 wt % NaOMe in MeOH (1.54 mL, 6.71 mmol). The resulting mixture was stirred 5 min and then diluted with MeOH to total volume 20 mL. 0.295 mL of this solution was added to a suspension of above crude product MeOH (3 mL). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to gave 3-(3″-amino-2″-methyl-4″,5″-dihydro-2″H-spiro(spiro(chroman-2,3′-[(2R,6R/2S,6S)-2,4,5,6-tetrahydro-6-methyl-pyran])-(4R/4S)-4,5″-[1,2,4]oxadiazole)-6-yl)benzonitrile and 3-(3″-amino-2″-methyl-4″,5″-dihydro-2″H-spiro(spiro(chroman-2,3′-[(2R,6R/2S,6S)-2,4,5,6-tetrahydro-6-methyl-pyran])-(4S/4S)-4,5″-[1,2,4]oxadiazole)-6-yl)benzonitrile as TFA salt.
Compound 272: 1H NMR (400 MHz, CD3OD) δ: 8.01-7.91 (m, 3H), 7.74-7.68 (m, 2H), 7.62 (t, J=8.0 Hz, 1H), 7.02 (d, J=8.4 Hz, 1H), 3.81 (dd, J=10.8, 2.8 Hz, 1H), 3.62-3.58 (m, 2H), 3.40 (s, 3H), 2.50 (m, 1H), 2.10 (dd, J=14.4, 1.6 Hz, 1H), 1.76 (m, 1H), 1.65 (m, 1H), 1.46 (m, 1H), 1.22 (d, J=6.0 Hz, 3H); MS ESI+ve m/z 405 (M+H)+.
Compound 275: 1H NMR (400 MHz, CD3OD) δ: 7.99 (d, J=1.2 Hz, 1H), 7.96-7.91 (m, 2H), 7.74-7.68 (m, 2H), 7.61 (m, 1H), 7.01 (d, J=8.8 Hz, 1H), 4.20 (d, J=11.2 Hz, 1H), 3.59 (m, 1H), 3.39 (s, 3H), 3.5 (m, 1H), 2.06-2.00 (m, 3H), 1.83 (m, 1H), 1.60-1.41 (m, 2H), 1.23 (d, J=6.4 Hz, 3H); MS ESI+ve m/z 405 (M+H)+.
To a solution of 3′-acetyl-4′-hydroxybiphenyl-3-carbonitrile (0.802 g, 3.38 mmol) and 1-acetylpiperidin-4-one (0.477 g, 3.38 mmol) in MeOH (50 mL) was added pyrrolidine (0.4 mL). The resulting solution was heated to reflux for 1.5 h. The reaction mixture was cool down to room temperature and the solvent was removed under reduced pressure. The residue was dissolved in DCM and washed with aqueous 1 M HCl, aqueous 1 M NaOH, and brine successively. Solvent was removed under reduced pressure after dried over anhydrous Na2SO4, to yield 0.768 g of 3-(1′-acetyl-4-oxospiro[chroman-2,4′-piperidine]-6-yl)benzonitrile as a light brown solid. It was used for next step without further purification. MS ESI+ve m/z 361 (M+H)+.
To a solution of 3-(1′-acetyl-4-oxospiro[chroman-2,4′-piperidine]-6-yl)benzonitrile (60 mg, 0.167 mmol) in anhydrous DCM (5 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.35 mL, 0.35 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.086 mL, 0.367 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was quenched with ice-water (5 g), and stirred for 20 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 2 times with DCM. The combined organic phases were dried over anhydrous
Na2SO4, and filtered, and concentrated to give N-(1′-acetyl-6-(3-cyanophenyl)spiro[chroman-2,4′-piperidine]-4-ylidene)cyanamide as light brown solid which was used for next step without further purification. MS ESI+ve m/z 385 (M+H)+.
To a suspension of above crude product was added a solution of N-methylhydroxylamine in MeOH (0.373 M, 0.45 mL, prepared from N-methylhydroxylamine HCl salt and 0.9 eq 25 wt % NaOMe/MeOH in MeOH). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to yield the desired product. 1H NMR (400
MHz, CD3OD) δ: 8.00 (s, 2H), 7.94 (m, 1H), 7.77-7.60 (m, 3H), 7.11 (dd, J=8.8, 2.4 Hz, 1H), 4.29 (m, 1H), 3.86-3.40 (m, 2H), 3.38 (s, 3H), 2.98 (m, 1H), 2.82 (d, J=14.8, 1H), 2.22 (d, J=14.8, 1H), 2.14 (s, 3H), 2.17-1.64 (m, 4H); MS ESI+ve m/z 432 (M+H)+.
To a 3′-acetyl-4′-hydroxybiphenyl-3-carbonitrile (0.273 g, 1.15 mmol) and 2-methoxy-8,9-dihydro-5H-benzo[7]annulen-6(7H)-one (0.219 g, 1.15 mmol) in MeOH (5 mL) was added pyrrolidine (0.12 mL). The resulting solution was heated to reflux for 4 h.
The reaction mixture was cool down to room temperature and the solvent was removed under reduced pressure. The residue was purified by flash chromatography on silica gel to yield 310 mg of compound (1). MS ESI+ve m/z 410 (M+H)+.
To a solution of compound (1) (55 mg, 0.13 mmol) in anhydrous DCM (5 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.26 mL, 0.26 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.080 mL, 0.34 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was quenched with ice-water (5 g), and stirred for 20 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 2 times with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give 65 mg desired crude compound (2) as light brown solid which was used for next step without further purification. MS ESI+ve m/z 434 (M+H)+.
To s suspension of the crude product obtained from previous step in MeOH (3 mL) was added a solution of N-methylhydroxylamine in MeOH (0.373 M, 0.35 mL, prepared from N-methylhydroxylamine HCl salt and 0.9 eq 25 wt % NaOMe/MeOH in MeOH). The mixture was stirred at room temperature for 20 min, followed by adding another portion of N-methylhydroxylamine in MeOH (0.373 M, 2 mL). Solvent was removed under reduced pressure after stirred another 20 min. The residue was purified by preparative PHLC to yield two isomers of the desired product as TFA salt.
Compound 302: 1H NMR (400 MHz, CD3OD) δ: 8.00-7.85 (m, 3H), 7.73-7.59 (m, 3H), 7.07 (d, J=8.4 Hz, 1H), 7.01 (d, J=8.8 Hz, 1H), 7.74-7.69 (m, 2H), 3.78 (m, 3H), 3.34 (m, 3H), 2.99-1.55 (m, 10H); MS ESI+ve m/z 481 (M+H)+.
Compound 311: 1H NMR (400 MHz, CD3OD) δ: 8.02-7.94 (m, 3H), 7.73-7.60 (m, 3H), 6.90 (d, J=8.8 Hz, 1H), 6.86 (d, J=8.0 Hz, 1H), 6.70 (d, J=2.8 Hz, 1H), 6.62 (dd, J=8.4, 2.4 Hz, 1H), 3.75 (m, 3H), 3.37 (m, 3H), 3.08-1.63 (m, 10H); MS ESI+ve m/z 481 (M+H)+.
An oven dried 3-necked round bottom flask equipped with condenser was charged with 6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (223 mg, 0.75 mmol), TEA (3 mL) and DEA (0.8 mL) under N2 atmosphere. To this solution was added CuI (5.7 mg, 0.03 mmol), PdCl2(PPh3)2 (21 mg, 0.03 mmol) and PPh3 (16 mg, 0.06 mmol). The system was degas once again, then phenylacetylene (0.41 mL, 3.75 mmol) was added and the mixture was heated to 80° C. (oil bath) with stirring. The reaction was evaporated after 12 h and the residue was purified by flash chromatography (12 g silica gel, eluted with EA in hexane in a gradient of 0-25%, v/v) to afford 6-(phenylethynyl)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (216 mg, yield: 90%). MS ESI+ve m/z 319 (M+H)+.
To a solution of 6-(phenylethynyl)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (86 mg, 0.27 mmol) in anhydrous DCM (10 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.54 mL, 0.54 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.16 mL, 0.427 mmol) dropwise. The resulting mixture was stirred 80 h. The reaction mixture was quenched with ice-water (15 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 2 times with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give 112 mg the crude desired product as light yellow solid, which was used for next step without further purification. MS ESI+ve m/z 343 (M+H)+.
To s suspension of the crude product (34 mg, 0.10 mmol) obtained from previous step in MeOH (2 mL) was added a solution of N-methylhydroxylamine in MeOH (prepared from N-methylhydroxylamine HCl salt (8.4 mg, 0.10 mmol) inanhydrous MeOH (4 mL) and 25 wt % NaOMe/MeOH (21 μL, 0.09 mmol), stirred 5 min). The mixture was stirred at room temperature for 20 min. Due to low conversion, another portion of N-methylhydroxylamine (prepared in the same way, 3 fold scale) was added and stirred over night. Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to yield 8.2 mg of the title compound as TFA salt. 1H NMR (400 MHz, CD3OD) δ: 7.81 (d, J=6.8 Hz, 1H), 7.55-7.47 (m, 4H), 7.40-7.33 (m, 4H), 6.98 (d, J=8.8 Hz, 1H), 3.88-3.73 (m, 2H), 3.65-3.55 (m, 2H), 3.37 (s, 3H), 2.84 (d, J=14.8 Hz, 1H), 2.12-1.55 (m, 5H); MS ESI+ve m/z 390 (M+H)+.
An oven dried 3-necked round bottom flask equipped with condenser was charged with 6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (223 mg, 0.75 mmol), TEA (3 mL) and DEA (0.8 mL) under N2 atmosphere. To this solution was added CuI (5.7 mg, 0.03 mmol), PdCl2(PPh3)2 (21 mg, 0.03 mmol) and PPh3 (16 mg, 0.06 mmol). The system was degas once again, then cyclopropyl acetylene (0.6 mL, excess) was added and the mixture was heated to 52° C. (oil bath) with stirring. The reaction was evaporated after 12 h and the residue was purified by flash chromatography (12 g silica gel, eluted with EA in hexane in a gradient of 0-20%, v/v) to afford 6-(cyclopropylethynyl)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (202 mg, yield: 93%). MS ESI+ve m/z 283 (M+H)+.
To a solution of 6-(cyclopropylethynyl)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (76 mg, 0.27 mmol) in anhydrous DCM (15 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.54 mL, 0.54 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.16 mL, 0.427 mmol) dropwise. The resulting mixture was stirred 80 h. The reaction mixture was quenched with ice-water (15 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 2 times with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered, and concentrated to give 106 mg the crude desired product as light yellow solid, which was used for next step without further purification. MS ESI+ve m/z 307 (M+H)+.
To s suspension of the crude product obtained from previous step in MeOH (5 mL) was added a solution of N-methylhydroxylamine in MeOH (prepared from N-methylhydroxylamine HCl salt (36 mg, 0.43 mmol) inanhydrous MeOH (4 mL) and 25 wt % NaOMe/MeOH (88 μL, 0.39 mmol), stirred 5 min). The mixture was stirred at room temperature for 12 h. Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to yield 16 mg of the title compound as TFA salt. 1H NMR (400 MHz, CD3OD) δ: 7.58 (s, 1H), 7.34 (d, J=8.4 Hz, 1H), 6.87 (d, J=8.4 Hz, 1H), 3.84-3.70 (m, 2H), 3.63-3.54 (m, 2H), 3.35 (s, 3H), 2.79 (d, J=14.8 Hz, 1H), 2.09-1.78 (m, 4H), 1.64 (m, 1H), 1.52 (m, 1H), 1.42 (m, 1H), 0.85 (m, 2H), 0.71 (m, 2H); MS ESI+ve m/z 354 (M+H)+.
A solution of 2-Acetyl-4-bromophenol (920 mg, 4.02 mmol), dihydro-2H-pyran-3(4H)-one (402 mg, 4.02 mmol) and pyrrolidine (0.5 mL) in MeOH (10 mL) was heated to reflux for 2 h. The reaction mixture was cooled down to room temperature and evaporated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%) to give 6-bromo-7-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (593 mg); MS ESI+ve m/z 311 (M+H)+.
To a 10 mL CEM microwave test tube was charged with Cs2CO3 (147 mg, 0.45 mmol), PdCl2(PPh3)2 (8 mg, 0.011 mmol), 6-bromo-7-methyl-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-one (70 mg, 0.225 mmol), 3-cyanophenylboronic acid (43 mg, 0.293 mmol), dioxane (4 mL) and H2O (0.2 mL), the system was swept with N2 and sealed, and heated in a CEM microwave reactor at 100° C. for 10 min. The reaction mixture was filtered, and concentrated. The residue was purified by flash chromatography on silica gel eluting with EA in hexane (0-20%) to give 3-(7-methyl-4-oxo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-6-yl)benzonitrile (72 mg). MS ESI+ve m/z 334 (M+H)+.
To a solution of 3-(7-methyl-4-oxo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-6-yl)benzonitrile (72 mg, 0.22 mmol) in anhydrous DCM (15 mL) under N2 atmosphere was added 1 M TiCl4 (in DCM, 0.44 mL, 0.44 mmol) dropwise within 15 min at room temperature. It was stirred another 1 h after the addition. To this mixture was added Bis-trimethylsilylcarbodiimide (0.114 mL, 0.506 mmol) dropwise. The resulting mixture was stirred overnight. The reaction mixture was quenched with ice-water (10 g), and stirred for 30 min, then it was transferred to a separating funnel, the separated aqueous phase was extracted 3 times with DCM. The combined organic phases were dried over anhydrous
Na2SO4, and filtered, and concentrated to give 104 mg the crude desired product as light yellow solid, which was used for next step without further purification. MS ESI+ve m/z 358 (M+H)+.
To s suspension of the crude product obtained from previous step in EtOH (3 mL) was added a solution of N-methylhydroxylamine in EtOH (0.6 mL, 0.22 mmol); prepared from N-methylhydroxylamine HCl salt (184 mg, 2.20 mmol) inanhydrous EtOH (5 mL) and 21 wt % NaOEt/EtOH (0.74 mL, 1.98 mmol), stirred 5 min and dilute with EtOH to total volume 6 mL). The mixture was stirred at room temperature for 20 min Solvent was removed under reduced pressure. The residue was purified by preparative PHLC to yield 39 mg of desired compound as TFA salt. 1H NMR (400 MHz, CD3OD) δ: 7.74-7.58 (m, 4H), 7.45 (d, J=6.4 Hz, 1H), 6.92 (s, 1H), 3.90-3.56 (m, 4H), 3.33 (s, 3H), 2.88 (m, 2H), 2.22 (s, 3H), 2.15-1.54 (m, 4H); MS ESI+ve m/z 405 (M+H)+.
The solution of 6-bromospiro[spiro[chroman-2,4′-(1-(tert-butoxycarbonyl)piperidine)]-4,4′-imidazolidine]-2″,5″-dione (127.7 mg, 0.274 mmol) and
Lawesson's reagent (110.7 mg, 0.274 mmol) in 1,4-dioxane (5 mL) in a 10 mL CEM microwave test tube was heated in a CEM microwave reactor at 150° C. for 40 min. To this reaction mixture was added acitic acid anhydride (0.05 mL) and pyridine (0.07 mL), followed by one piece of DMAP, then the reaction mixture was stirred at room temperature for 20 min MeOH (2 mL) was added to quench the reaction and stirred another 30 min K2CO3 (150 mg) was added and stirred another 30. The solvent was removed under reduced pressure, and the residue was dissolved in MeOH again and filtered. The filtrate was purified by preparative HPLC to yield 33 mg of the desired product. MS ESI+ve m/z 424 (M+H)+.
To a solution of 6-bromo-spiro[spiro[chroman-2,4′-(1-acetylpiperidine)]-4,4′-(2-thioxoimidazolidin)]-5″-one (34 mg, 0.08 mmol) in MeOH (5 mL) charged in a 10 mL CEM microwave test tube was added a 0.6 N NaOH aqueous solution (0.5 mL). After stirring at room temperature for 10 min, MeI (0.07 mL) was added, and the reaction mixture was heated in a CEM microwave reactor at 60° C. for 10 min. The resulting mixture was diluted with EA, and washed with H2O, and brine successively, and dried over anhydrous Na2SO4, and filtered, and concentrated to produce the crude product. It was used for next step without further purification. MS ESI+ve m/z 452 (M+H)+.
A suspension of above crude product and NH4I (150 mg, excess) in dioxane (1 mL) and 7 M NH3/MeOH (3 mL) charged in a 10 mL CEM microwave test tube was heated to 110° C. for 1 h. Due to incompletion of the reaction, the reaction was heated at 120° C. for another 30 min. The solvent was removed in vacuum and the residue was purified by preparative HPLC to give 8 mg of the desired product as a TFA salt. MS ESI+ve m/z 421 (M+H)+.
To a solution of above product TFA salt (8 mg, 0.14 mmol), 3-cyanophenylboronic acid (51 mg, 0.07 mmol) and Cs2CO3 (30 mg, 0.09 mmol) in 1,4-dioxane (3 mL) and H2O (0.5 mL) charged in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (2 mg), then the system was degassed by sweeping N2. The tube was capped and heated to 100° C. for 10 min in a CEM microwave reactor. Solvent was removed in vacuum and the residue was purified by preparative HPLC to give 5 mg of the desired product as a TFA salt. 1H NMR (400 MHz, CD3OD): 7.95 (s, 1H), 7.94 (s, 1H), 7.87 (m, 1H), 7.75-7.46 (m, 3H), 7.15 (d, J=8.4 Hz, 1H), 4.32 (m, 1H), 3.82-3.48 (m, 2H), 3.32 (s, 3H), 3.26-3.05 (m, 1H), 2.53 (d, J=14.8 Hz, 1H), 2.37 (d, J=14.8 Hz, 1H), 2.14 and 2.11 (s and s, 3H), 2.10-2.00 (m, 2H), 1.87-1.62 (m, 2H); MS ESI+ve m/z 444 (M+H)+.
A solution of 6-bromo-2-(1,2,3,4-tetrahydronaphthalen-1-yl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (67.4 mg, 0.158 mmol) and Lawesson's reagent (63.8 mg, 0.158 mmol) in dioxane (3 mL) charged in a 10 mL CEM microwave test tube was heated to 140° C. in a CEM microwave reactor for 30 min Solvent was removed under reduced pressure, and purified by flash chromatography on silica gel to yield 46 mg of the desired product as white solid. MS ESI+ve m/z 443 (M+H)+.
To a solution of 6-bromo-2-(1,2,3,4-tetrahydronaphthalen-1-yl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (46 mg, 0.10 mmol) in MeOH (3 mL) charged in a 10 mL CEM microwave test tube was added a 0.6 N NaOH aqueous solution (0.35 mL). After stirring at room temperature for 10 min, MeI (0.5 mL, excess) was added, and the reaction mixture was heated in a CEM microwave reactor at 60° C. for 10 min. The reaction mixtures was diluted with ethyl acetate, and washed with H2O, brine successively, and dried over anhydrous Na2SO4, and filtered, and concentrated to produce the desired crude product, which was used for next step without further purification. MS ESI+ve m/z 471 (M+H)+.
A suspension of above product and NH4I (100 mg, excess) in 7 M NH3/MeOH (4 mL) and 1,4-dioxane (1.5 mL) charged in a 10 mL CEM microwave test tube was heated to 110° C. for 1 h. Another portion of NH4I (100 mg, excess) was added and heated to 110° C. for another 1 h due to incompletion. The solvent was removed in vacuum and the residue was purified by preparative HPLC to yield the desired product as TFA salt. MS ESI+ve m/z 440 (M+H)+.
To a solution of 2-amino-6′-bromo-1-methyl-2′-phenylspiro[imidazole-4,4′-thiochroman]-5(1H)-one TFA salt (20 mg, 0.036 mmol), 3-cyanophenylboronic acid (7 mg, 0.047 mmol) and Cs2CO3 (30 mg, 0.092 mmol) in 1,4-dioxane (4 mL) and H2O (0.5 mL) charged in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (3 mg, 0.004 mmol), then the system was degassed by sweeping N2. The tube was capped and heated to 110° C. for 10 min in a CEM microwave reactor. Solvent was removed in vacuum and the residue was purified by preparative HPLC to yield 4 isomers of the desired product as a TFA salt.
Compound 188: 1H NMR (400 MHz, CD3OD) δ: 7.96 (m, 1H), 7.88 (m, 1H), 7.68-7.52 (m, 4H), 7.28 (m, 1H), 7.11 (m, 4H), 5.38 (m, 1H), 3.31 (s, 3H), 3.03 (m, 2H), 2.78 (m, 2H), 2.24-1.68 (m, 5H); MS ESI+ve m/z 463 (M+H)+.
Compound 282: 1H NMR (400 MHz, CD3OD) δ: 7.95 (d, J=1.6 Hz, 1H), 7.87 (dd, J=7.6, 1.2 Hz, 1H), 7.67-7.56 (m, 3H), 7.48 (d, J=2.4 Hz, 1H), 7.30 (m, 1H), 7.13-7.11 (m, 4H), 5.34, 5.20 (two m, 1H), 3.41 (m, 1H), 3.31 (s, 3H), 2.78 (m, 2H), 2.24 (m, 1H), 2.14-1.84 (m, 4H), 1.76 (m, 1H); MS ESI+ve m/z 463 (M+H)+.
Compound 335: 1H NMR (400 MHz, CD3OD) δ: 7.92 (d, J=1.6 Hz, 1H), 7.85 (dd, J=6.0, 1.6 Hz, 1H), 7.67-7.64 (m, 2H), 7.58 (m, 1H), 7.38 (d, J=2.4 Hz, 1H), 7.34 (m, 1H), 7.12-7.11 (m, 4H), 3.31 (s, 3H), 2.79 (m, 2H), 2.35 (m, 1H), 2.11 (m, 2H), 1.93 (m, 4H), 1.78 (m, 1H); MS ESI+ve m/z 463 (M+H)+.
To a solution of 6-bromo-spiro[spiro[chroman-2,1′-(3-oxacyclohexane)]-4,4′-imidazolidine]-2″,5″-dione (1.004 g, 2.74 mmol) in THF (30 mL) was added Boc2O (1.791 g, 8.21 mmol), followed by DMAP (100 mg). The mixture was stirred at room temperature for 30 min. The solvent was removed under reduced pressure and the residue was purified by flash chromatography on silica gel to yield 410 mg of 6-bromo-spiro[spiro[chroman-2,1′-(3-oxacyclohexane)]-4,4′-(1,3-di-Boc-imidazolidine)]-2″,5″-dione. The product was dissolved in 2 M KOH (4.4 mL). The solution was charged in a 10 mL CEM microwave test tube and heated to 150° C. for 2 h. The reaction mixture was acidified with 6 M HCl to pH 2 and evaporated to dryness. The residue was filtered through a funnel and washed with MeOH. The filtrate was concentrated to yield 232 mg of the desired product.
To a solution of 4-amino-6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-carboxylic acid (232 mg, 0.68 mmol) in MeOH (10 mL) chilled to 0° C. was added SOCl2 (0.5 mL), the mixture was heated to reflux for 12 h. Every other 8-16 h, the reaction was cooled to 0° C. again and SOCl2 (1 mL) was added carefully, and then the mixture was heated to reflux. The reaction was monitored by LC-MS, 90% conversion was achieved after repeat 6-8 times. In a separated reaction repeat the same reaction with starting material (300 mg, 0.88 mmol) till greater than 90% conversion. The two reactions was combined and evaporated. The residue was dissolved in EA, washed with saturated aqueous NaHCO3, followed by brine. The organic layer was dried over anhydrous Na2SO4, and filtered, and concentrated to dryness. The residue was dissolved in CH3CN (20 mL) containing Boc2O (1.203 g, 5.51 mmol) and NaHCO3 (1.159 g, 13.8 mmol). The mixture was heated to reflux overnight. The reaction mixture was cooled to room temperature and diluted with EA, washed with H2O, the separated aqueous phase was extracted with EA once. The combined organic phases were washed with brine, dried over anhydrous Na2SO4, and filtered, and concentrated to dryness. The residue was purified by flash chromatography on silica gel to yield 314 mg of the desired product. MS ESI+ve m/z 478 (M+Na)+.
To a solution of 6-bromo-4-(tert-butoxycarbonylamino)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-carboxylate (314 mg, 0.69 mmol) in anhydrous THF (10 mL) at −78° C. under N2 atmosphere was added 1 M LAH (in THF, 1.4 mL, 1.4 mmol) dropwise. The mixture was stirred for 30 min at this temperature and then warmed to room temperature and stirred overnight. The reaction mixture was cooled to 0° C. and quenched with Na2SO4.H2O carefully, then stirred several hours. The reaction was filtered through a short pad of Celite and washed with THF. The filtrate was evaporated to give 165 mg of the desired product as colorless oil. MS ESI+ve m/z 428 (M+H)+.
To a solution of SOCl2 (0.07 mL, 114.7 mg, 0.964 mmol) in anhydrous in CH3CN (2 mL) at −40° C. under N2 atmosphere was added a solution of tert-butyl 6-bromo-4-(hydroxymethyl)-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-ylcarbamate (165 mg, 0.386 mmol) in anhydrous in CH3CN (15 mL, low solubility) dropwise, followed by pyridine (0.156 mL, 153 mg, 1.93 mmol). The reaction was allowed to warm to room temperature within 1 h, and stirred another 2 h at room temperature. The solvent was removed under reduced pressure. The residue was dissolved in EA, and filtered. The filtrate was concentrated to dryness, the residue was dissolved in CH3CN (6 mL) and H2O (3 mL) and chilled to 0° C. To the solution was added RuO2 (8 mg, 0.06 mmol) and NaIO4 (124 mg, 0.579 mmol). The mixture was stirred 30 min at this temperature and warm to room temperature and stirred another 2 h. RuCl3 (8 mg, 0.039 mmol) and NaIO4 (624 mg, 2.92 mmol) was added. The mixture was stirred another 1 h and diluted with EA, washed with brine. The organic layer was dried over anhydrous Na2SO4, and filtered, and concentrated to dryness to yield 146 mg of the desired product. MS ESI+ve m/z 512 (M+Na)+.
A solution of tert-butyl 6-bromo-spiro[spiro[chroman-2,1′-(3-oxacyclohexane)]-4,4′-(2,2-dioxol[1,2,3]oxathiazolidine)]-3″-carboxylate (146 mg, 0.37 mmol) in DCM (4 mL) and TFA (1 mL) was stirred 3 h at room temperature. Solvents were removed under reduced pressure and the residue was dissolved in DCM (8 mL) at room temperature. To this solution was added allyl iodide (0.4 mL, large excess), Bu4NCl (16 mg, 0.058 mmol) and 40% NaOH (3 mL). The resulting mixture was stirred at room temperature for 16 h. The separated organic phase was washed with H2O, brine successively, and dried over anhydrous Na2SO4, and filtered, and concentrated to dryness. The residue was purified by flash chromatography on silica gel (4 g) to yield 73 mg of the desired product. MS ESI+ve m/z 294 (M+H-allyl-NSO3)+.
To a solution of tert-butyl hydroxy(methyl)carbamate (112 mg, 0.76 mmol, prepared according the procedure described in Org. Lett 2007, 9, 4009) in anhydrous DMF (2 mL) at room temperature under N2 atmosphere was added NaH (60%, 30 mg, 0.76 mmol). The mixture was stirred for 15 min, then a solution of 3″-allyl-6-bromo-spiro[spiro[chroman-2,1′-(3-oxacyclohexane)]-4,4′-(2,2-dioxol[1,2,3]oxathiazolidine)] (73 mg, 0.17 mmol) in anhydrous DMF (1 mL) was added. The resulting mixture was stirred 16 h (color changed from light yellow to green, then to light orange in the end). The reaction was quenched with saturated aqueous NH4Cl and extracted with EA, the separated organic phase was washed with H2O, brine successively, and dried over anhydrous Na2SO4, and filtered, and concentrated to dryness. The residue was used for next step without further purification. MS ESI+ve m/z 497 (M+H)+.
A solution of Pd2(dba)3 (7.6 mg, 0.038 mmol) and 1,4-bis(diphenylphosphino)butane (3.6 mg, 0.038 mmol) in THF (3 mL) under N2 atmosphere was stirred for 15 min. Then the solution was added to a solution of tert-butyl (4-(allylamino)-6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-yl)methoxy(methyl)carbamate produced in previous step in THF (3 mL), followed by thiosalicylic acid (14 mg, 0.91 mmol). The mixture was stirred for 16 h. The solvent was removed under reduced pressure. The residue was purified by preparative HPLC to recover 28 mg of starting material as TFA salt and 10 mg of the desired product as TFA salt. MS ESI+ve m/z 457 (M+H)+.
The solution of tert-butyl (4-amino-6-bromo-2′,4′,5′,6′-tetrahydrospiro[chroman-2,3′-pyran]-4-yl)methoxy(methyl)carbamate in 4 M HCl/dioxane (2 mL) was stirred 1 h. Due to incompletion of the reaction 4 M HCl/dioxane (3 mL) was added and stirred overnight. The solvent was removed under reduced pressure. The residue was dissolved in DCM (10 mL), washed with 1 M NaOH (10 mL). The separated aqueous phase was extracted with DCM twice. The combined organic phases were combined and dried over anhydrous Na2SO4, and filtered, and concentrated to dryness. The residue was dissolved in EtOH (3 mL). To this solution was added a solution of cyanogen bromide (0.5 M in THF, 0.052 mL, 0.026 mmol). The resulting mixture was stirred overnight. The solvent was removed under reduced pressure. The residue was dissolved in DCM and washed with 1 M NaOH. The separated aqueous phase was extracted with DCM twice. The combined organic phases were combined and dried over anhydrous Na2SO4, and filtered, and concentrated to dryness to yield the desired product. It was used for next step without further purification. MS ESI+ve m/z 382 (M+H)+.
To a solution of above crude product, 3-cyanophenylboronic acid (12 mg, 0.08 mmol) and Cs2CO3 (48 mg, 0.147 mmol) in 1,4-dioxane (4 mL) and H2O (0.5 mL) charged in a 10 mL CEM microwave test tube was added PdCl2(PPh3)2 (6 mg, 0.008 mmol), then the system was degassed by sweeping N2. The tube was capped and heated to 110° C. for 10 min in a CEM microwave reactor. Solvent was removed in vacuum and the residue was purified by preparative HPLC to yield 3.82 mg of the desired product as a TFA salt. 1H NMR (400 MHz, CD3OD) δ: 7.99 (s, 1H), 7.91 (d, J=7.6 Hz, 1H), 7.74 (m, 1H), 7.69-7.59 (m, 3H), 7.09 (dd, J=8.4, 2.8 Hz, 1H), 4.48-4.26 (m, 2H), 3.87-3.70 (m, 2H), 3.65-3.53 (m, 2H), 3.48 (s, 3H), 2.49, 2.43 (two d, J=14.4 Hz, 1H), 2.19, 2.14 (two d, J=14.4 Hz, 1H), 1.97 (m, 2H), 1.81 (m, 1H), 1.57 (m, 1H); MS ESI+ve m/z 405 (M+H)+.
In a 50 mL round bottom flask was placed 5-bromo-2-hydroxyacetophenone (1 g, 4.65 mmol) and 4-phenylcyclo-hexanone (810 mg, 4.65 mmol). They were dissolved in MeOH (9.3 mL). To this solution was added pyrrolidine (764 μL, 9.30 mmol) dropwise. To the flask was attached a condenser and the reaction mixture was heated at reflux overnight (˜14 hours). The next morning the volatiles were remove under reduced pressure and the crude material was purified by flash chromatography (ISCO, 40 g SiO2 cartridge, Ethyl Acetate/Hexanes as the eluents). The corresponding fractions were combined and concentrated yielding 6-bromo-4′-phenylspiro[chroman-2,1′-cyclohexan]-4-one (1.12 g, 3.03 mmol, 65%).
M+H=370.9, 372.9
1H NMR═(CDCl3, 400 MHz) δ 7.98 (d, J=2.4 Hz, 1H), 7.57 (dd, J=8.8, 2.8 Hz, 1H), 7.34-7.31 (m, 2H), 7.26-7.20 (m, 3H), 6.96 (d, J=8.8 Hz), 2.72 (s, 2H), 2.58 (m, 1H), 2.25 (dd, J=15.2, 2.4 Hz, 2H), 1.92 (m, 2H), 1.76 (m, 2H), 1.56 (dt, J=14.0, 4.0 Hz) ppm.
In a 50 mL round bottom flask was placed 6-bromo-4′-phenylspiro[chroman-2,1′-cyclohexan]-4-one (300 mg, 0.811 mmol), 3-cyanobenzeneboronic acid (155 mg, 1.06 mmol), PdCl2(PPh3)2 (57 mg, 0.08 mmol) and cesium carbonate (661 mg, 2.03 mmol). This solid mixture was dissolved in a Dioxane/water mixture (8 mL, 6:1 ratio, respectively). The solution was purged with a N2 stream for 30 seconds. A condenser was attached to the flask and the reaction was allowed to stir at 95° C. for 1 hour. At this time, the mixture was filtered through a Celite plug. The plug was rinsed with dichloromethane (20 mL) and water (20 mL). The phases in the filtrate were separated. The aqueous phase was back-extracted with dichloromethane twice (5 mL/each). The combined organic phases were dried over MgSO4, filtered and concentrated under reduce pressure. The crude material was purified by flash chromatography (ISCO, 12 g SiO2 cartridge, ethyl acetate/hexanes as the eluents). The corresponding fractions were combined and concentrated under reduce pressure yielding 3-(4-oxo-4′-phenylspiro[chroman-2,1′-cyclohexane]-6-yl)benzonitrile (173 mg, 0.440 mmol, 58% yield) as a light yellow oil.
M+H=394.0
1H NMR═(CDCl3, 400 MHz) δ 8.09 (d, J=2.0 Hz, 1H), 7.86 (s, 1H), 7.81 (d, J=7.6 Hz, 1H), 7.73 (dd, J=8.8, 2.4 Hz, 1H), 7.62 (d, J=8.0 Hz, 1H), 7.54 (t, J=7.6 Hz, 1H), 7.36-7.32 (m, 2H), 7.29-7.21 (m, 3H) 7.18 (d, J=8.8 Hz, 1H), 2.79 (s, 2H), 2.61 (m, 1H), 2.31 (d, J=12.8 Hz, 2H), 1.98 (m, 2H), 1.79 (d, J=12.4 Hz, 2H), 1.60 (dt, J=14.0, 3.6 Hz, 2H) ppm.
In a 20 mL vial was placed the cyanoketone (98 mg, 0.249 mmol), and it was azeotroped twice with toluene (2 mL/each). Dichloromethane (6 mL) was added followed by TiCl4 (500 μL, 0.500 mmol, 1M in DCM). The reaction mixture was allowed to stir at room temperature for 1 hour. At that time bis-trimethylsilylcarbodiimide (179 μL, 0.797 mmol) was added and the solution was allowed to stir overnight (14 hours) at room temperature. The reaction was quenched with ice cold water (5 mL). The two phases were separated and the aqueous phase was back-extracted twice with dichloromethane (2 mL/each). The combined organic phases were dried over MgSO4, filtered, concentrated under reduce pressure and azeotroped with toluene (2 mL). In a separate flame dried 4 mL vial was placed MeNH(OH).HCl (23 mg, 0.275 mmol) and it was dissolved in MeOH (4 mL). To this solution was added NaOMe (50 μL, 25% in MeOH) and the solution was stirred for 5 minutes at room temperature. This solution was transferred, via syringe, to the cyanoimine prepared above and stirred at room temperature for 1 hour. After the hour, the reaction mixture was concentrated under reduce pressure and the crude material was purified on a HPLC (Gilson, 10-90% CH3CN/H2O with 0.1% TFA as the eluent). The corresponding fractions were combined and concentrated yielding the final product (12.7 mg, 0.027 mmol, 11% yield) as a white solid.
M+H=465.1
1H NMR═(CD3OD, 400 MHz) δ 8.00 (bs, 1H), 7.98 (d, J=2.4 Hz, 1H), 7.95-7.93 (m, 1H) 7.75 (dd, J=8.8, 2.4 Hz, 1H), 7.70-7.68 (m, 1H), 7.62 (t, J=8.0 Hz, 1H), 7.31-7.25 (m, 4H), 7.18-7.16 (m, 1H), 7.15 (d, J=8.4 Hz, 1H), 3.40 (s, 3H), 2.76 (d, J=15.2
Hz, 1H), 2.66-2.58 (m, 1H), 2.41-2.37 (m, 1H), 2.25-1.99 (m, 4H), 1.88-1.59 (m 4H) ppm.
In a 50 mL round bottom flask was placed 5-bromo-2-hydroxyacetophenone (1 g, 4.65 mmol) and 1,4-cyclohexanedione mono-ethylelene ketal (726 mg, 4.65 mmol). They were dissolved in MeOH (9.3 mL). To this solution was added pyrrolidine (764 μL, 9.30 mmol) dropwise. To the flask was attached a condenser and the reaction mixture was heated at reflux overnight (˜14 hours). The next morning a precipitate was observed in the reaction media. The reaction was allowed to cool down to room temperature and then placed on an ice bath. The solid was collected by filtration and it was rinsed with cold
MeOH. The light yellow solid collected corresponded to the benzopyran (1.43 g, adduct. 4.06 mmol, 87% yield).
M+H=352.9, 354.9
1H NMR═(CDCl3, 400 MHz) δ 7.96 (d, J=2.8 Hz, 1H), 7.55 (dd, J=8.8, 2.8 Hz, 1H), 6.88 (d, J=8.8 Hz, 1H), 3.96 (m, 4H), 2.70 (s, 2H), 2.09 (m, 2H), 1.95 (ddd, J=13.2, 13.2, 3.6 Hz, 2H), 1.75 (ddd, J=13.6, 13.6, 4.0 Hz, 2H), 1.60 (m, 2H) ppm.
In a 20 mL vial was placed the previous spiro compound (400 mg, 1.136 mmol) and it was dissolve in THF (5 mL). To this solution was added 3M HCl (5 mL) at room temperature. The reaction was allowed to stir at room temperature until total consumption of the starting ketal (judge by TLC). After completion the reaction was slowly quenched with saturated aqueous NaHCO3 until pH 7 was reached. The solution was diluted with ethyl acetate (20 mL). The phases were separated and the aqueous phase was back-extracted with ethyl acetate twice (10 mL/each). The combined organic phases were washed with brine, dried over Na2SO4, filtered and concentrated under reduce pressure. The crude material was purified by flash chromatography (ISCO, 40 g SiO2 cartridge, ethyl acetate/hexanes as the eluents). The corresponding fractions were combined and concentrated under reduce pressure yielding 6-bromospiro[chroman-2,1′-cyclohexane]-4,4′-dione (254 mg, 0.825 mmol, 73% yield).
M+H=308.8, 311.0
1H NMR═(CDCl3, 400 MHz) δ 8.01 (d, J=2.8 Hz, 1H), 7.62 (dd, J=8.8, 2.8 Hz, 1H), 6.96 (d, J=8.8 Hz, 1H), 2.80 (s, 2H), 2.71 (ddd, J=14.8, 14.8, 6.0 Hz, 2H), 2.44 (m, 2H), 2.32 (m, 2H), 1.90 (ddd, J=14.0, 14.0, 5.2 Hz, 2H) ppm.
In a 25 mL round bottom flask was placed 6-bromospiro[chroman-2,1′-cyclohexane]-4,4′-dione (240 mg, 0.779 mmol) and it was dissolved in THF (7.8 mL). To this solution was added NaBH4 (30 mg, 0.789 mmol) and the reaction was allowed to stir at room temperature for 5 minutes. At that time, TLC indicated total consumption of the diketone. The reaction was diluted with water (10 mL) and ethyl acetate (10 mL) and it was allowed to stir for 15 minutes. The phases were separated and the aqueous phase was back-extracted with ethyl acetate twice (5 mL/each). The combined organic phases were washed with brine, dried over Na2SO4, filtered and concentrated under reduce pressure. The crude material was purified by flash chromatography (ISCO, 40 g SiO2 cartridge, ethyl acetate/hexanes as the eluents). A 3:1 mixture of separable isomers formed. The less-polar product (judge by TLC) was cleanly separated by flash chromatography (ISCO, 40 g SiO2 cartridge, ethyl acetate/hexanes as the eluents) and use for further development. The corresponding fractions for less-polar product were combined and concentrated under reduce pressure yielding one of the isomers of 6-bromo-4′-hydroxyspiro[chroman-2,1′-cyclohexan]-4-one (58 mg, 0.187 mmol, 24% yield).
M+H=310.9, 312.9
1H NMR═(CDCl3, 400 MHz) δ 7.96 (d, J=2.4 Hz, 1H), 7.56 (dd, J=8.8, 2.4 Hz, 1H), 6.90 (d, J=8.8 Hz, 1H), 3.70 (m, 1H), 2.67 (s, 2H), 2.14 (m, 2H), 1.83-1.67 (m, 4H), 1.46 (ddd, J=14.0, 14.0, 4.4 Hz, 2H) ppm.
In a 20 mL vial was placed 6-bromo-4′-hydroxyspiro[chroman-2,1′-cyclohexan]-4-one (46 mg, 0.148 mmol) and it was azeotroped with acetonitrile (3 mL). The solid was dissolved in acetonitrile (1 mL). To this heterogenous solution was added Ag2O (103 mg, 0.444 mmol) followed by freshly grounded Drierite (160 mg). Then MeI (185 μL, 2.97 mmol) was added, the vial was capped and the reaction was allowed to stir at room temperature. After 2 days stiffing the alcohol was totally consumed. The reaction mixture was filtered through a plug of Celite and the cake was rinsed with ethyl acetate three times (2 mL/each). The filtrate was concentrated yielding crude 6-bromo-4′-methoxyspiro[chroman-2,1′-cyclohexan]-4-one (48 mg, 0.148 mmol, 100% yield) which by 1H NMR looked>90% pure.
M+H=324.9, 326.9
1H NMR═(CDCl3, 400 MHz) δ 7.95 (d, J=2.4 Hz, 1H), 7.54 (dd, J=8.8, 2.4 Hz, 1H), 6.88 (d, J=8.8 Hz, 1H), 3.36 (s, 3H), 3.21 (m, 1H), 2.67 (s, 2H), 2.14 (m, 2H), 1.85 (m, 2H), 1.67 (m, 2H), 1.44 (ddd, J=13.6, 13.6, 4.0 Hz) ppm.
In a μwave vial was placed 6-bromo-4′-methoxyspiro[chroman-2,1′-cyclohexan]-4-one (48 mg, 0.148 mmol), 3-cyanobenzeneboronic acid (28 mg, 0.191 mmol), PdCl2(PPh3)2 (10 mg, 0.014 mmol) and cesium carbonate (121 mg, 0.371 mmol). This solid mixture was dissolved in a Dioxane/water mixture (2.0 mL, 6:1 ratio, respectively). The solution was purged with a N2 stream for 20 seconds. The vessel was placed in the μwave and heated to 100° C. for 5 minutes. After that time, the mixture was filtered through a Celite plug. The plug was rinsed with dichloromethane (10 mL) and water (10 mL). The phases in the filtrate were separated. The aqueous phase was back-extracted with dichloromethane (5 mL). The combined organic phases were washed with water, brine, dried over MgSO4, filtered and concentrated under reduce pressure. The crude material was purified by flash chromatography (ISCO, 12 g SiO2 cartridge, ethyl acetate/hexanes as the eluents). The corresponding fractions were combined and concentrated under reduce pressure yielding 3-(4′-methoxy-4-oxospiro[chroman-2,1′-cyclohexane]-6-yl)benzonitrile (32 mg, 0.092 mmol, 62% yield).
M+H=348.1
1H NMR═(CDCl3, 400 MHz) δ 8.05 (d, J=2.4 Hz, 1H), 7.83 (dd, J=1.6, 1.6 Hz, 1H), 7.78 (ddd, J=8.0, 1.6, 1.6 Hz, 1H), 7.69 (dd, J=8.4, 2.4 Hz, 1H), 7.60 (ddd, J=7.6, 1.6, 1.6 Hz, 1H), 7.52 (t, J=7.6 Hz, 1H), 7.09 (d, J=8.4 Hz, 1H), 3.37 (s, 3H), 3.24 (m, 1H), 2.73 (s, 2H), 2.19 (m, 2H), 1.88 (m, 2H), 1.72 (m, 2H), 1.48 (ddd, J=14.0, 14.0, 4.0 Hz, 2H) ppm.
In a 20 mL vial was placed 3-(4′-methoxy-4-oxospiro[chroman-2,1′-cyclohexane]-6-yl)benzonitrile (32 mg, 0.092 mmol), and it was azeotroped with toluene (2 mL). Dichloromethane (3 mL) was added followed by TiCl4 (184 μL, 0.184 mmol, 1M in DCM). The reaction mixture was allowed to stir at room temperature for 1 hour. At that time bis-trimethylsilylcarbodiimide (66 μL, 0.294 mmol) was added and the solution was allowed to stir overnight (14 hours) at room temperature. The reaction was quenched with ice cold water (5 mL). The two phases were separated and the aqueous phase was back-extracted twice with dichloromethane (2 mL/each). The combined organic phases were dried over MgSO4, filtered, concentrated under reduce pressure and azeotroped with toluene (2 mL). In a separate flame dried 4 mL vial was placed MeNH(OH).HCl (9 mg, 0.108 mmol) and it was dissolved in MeOH (2 mL). To this solution was added NaOMe (19 μL, 25% in MeOH) and the solution was stirred for 5 minutes at room temperature. This solution was transferred, via syringe, to the cyanoimine prepared above and stirred at room temperature for 1 hour. After that time, the reaction mixture was concentrated under reduce pressure and the crude material was purified on a HPLC (Gilson, 10-90% CH3CN/H2O with 0.1% TFA as the eluent). The corresponding fractions were combined and concentrated yielding the final product (7.1 mg, 0.017 mmol, 18% yield) as a colorless oil.
M+H=419.1
1H NMR═(CD3OD, 400 MHz) δ 7.99 (bs, 1H), 7.96 (d, J=2.4 Hz, 1H), 7.94-7.91 (m, 1H), 7.74-7.71 (dd, J=8.8, 2.4 Hz, 1H), 7.71-7.67 (m, 1H), 7.66-7.59 (m, 1H), 7.05 (d, J=8.8 Hz, 1H), 3.38 (s, 3H), 3.37 (s, 3H), 3.34 (bs, 1H), 2.76 (d, J=14.8 Hz, 1H), 2.17 (d, J=14.8 Hz, 1H), 2.22-213 (m, 1H), 2.01-1.78 (m, 4H), 1.73-1.47 (m, 3H) ppm.
A solution of AgNO3 (155 g, 913 mmol) in water (200 mL) was added to a stirred solution of 3,4-dihydro-2H-pyran-2-carbaldehyde (31 g, 277 mmol) in ethanol (900 mL), followed by addition of a solution of KOH (102 g, 1.83 mol) in water (900 mL) in 1 hour. The mixture was filtered and evaporated. The residue was extracted with ether. The aqueous layer was adjusted to pH=3 with 6 N HCl and extracted with ether. The organic layer was evaporated and the residue was treated with 1 N NaOH (332 mL, 332 mmol).
The mixture was co-evaporated with methanol to dryness to give compound 1 (39 g, 94%). 1H-NMR (400 MHz D2O): δ6.24 (d, 1H), 4.16 (dd, 1H), 1.93 (d, 2H), 1.65-1.85 (m, 2H).
To a suspension of sodium 3,4-dihydro-2H-pyran-2-carboxylate (13.6 g, 90.9 mmol) in THF (150 mL) was added triethylamine (919 mg, 9.1 mmol), DMF (336 mg, 4.6 mmol), followed by addition of isobutyl chloroformate (13.6 g, 100 mmol) at −10° C.
After being stirred at room temperature for 2 hours, the mixture was added a solution of diazomethane in ether (1 N, 500 mL, 500 mmol) at −78° C. The reaction mixture was stirred at room temperature overnight. The diazomethane was bumped off by N2 for 2 h hours and filtered. The filtrate was concentrated, and the residue was purified by silica gel column by using dichloromethane as eluant to give the compound 2 (11.8 g, 86%).
To a suspension of rhodium acetate dimer (120 mg) in dichloromethane (60 mL) was added a solution of 2-diazo-1-(3,4-dihydro-2H-pyran-2-yl)-ethanone (6 g, 39.5 mmol) in dichloromethane (60 mL). When the addition was completed, the reaction was stirred for another 1 hour. The mixture was washed with 5% aqueous NaHCO3 and concentrated. The residue was purified by flash chromatograph to give the compound 3 (2 g, 41%).
To a solution of 6-oxa-tricyclo[3.2.1.02,7]octan-8-one (0.5 g, 4 mmol) in ethyl acetate (10 mL) was added Pd/C (100 mg). The mixture was stirred at room temperature under H2 (50 psi) for 6 hours. The mixture was filtered, the filtrate was concentrated to give the compound 4 (440 mg, 87%).
A solution of 2-oxa-bicyclo[2.2.2]octan-6-one (252 mg, 2 mmol), 1-(5-bromo-2-hydroxy-phenyl)-ethanone (215 mg, 1 mmol) and pyrrolidine (142 mg, 2 mmol) in toluene (5 mL) was refluxed overnight. The mixture was treated with 1 N HCl, and the aqueous layer was adjusted to pH=10 and extracted with ethyl acetate. The combined organic layer was washed with brine, dried, and concentrated. The residue was purified by preparative TLC to give the Isomer A (160 mg, 50%) and Isomer B (90 mg, 28%). Isomer A: 1H-NMR (400 MHz CDCl3): δ7.89 (d, 1H), 7.46 (m, 1H), 6.78 (d, 1H), 3.79 (d, 1H), 3.66 (t, 1H), 3.61 (m, 1H), 2.90 (m, 2H), 2.00 (m, 3H), 1.81 (m, 2H), 1.64 (m, 2H).
Isomer B: 1H-NMR (400 MHz CDCl3): δ7.86 (d, 1H), 7.48 (dd, 1H), 6.91 (d, 1H), 3.88 (m, 1H), 3.80 (m, 2H), 2.69 (d, 2H), 2.01 (m, 2H), 1.60-1.85 (m, 4H), 1.46 (m, 1H).
A mixture of Pd(PPh3)2Cl2 (35 mg, 0.05 mmol), Isomer A (160 mg, 0.5 mmol), Cs2CO3 (2 N, 0.5 mL, 1 mmol) and 3-cyanophenylboronic acid (147 mg, 1 mmol) in 1,4-dioxane (1 mL) was stirred at 100° C. in microwave for 30 minutes. The reaction mixture was treated with ethyl acetate and water. The organic layer was concentrated in vacuo to give the crude product, which was purified by preparative TLC to give the compound 5 (50 mg, 29%).
To a solution of compound 5 (50 mg, 0.145 mmol) in anhydrous DCM (2 mL) was added TiCl4 (0.72 mL, 0.72 mmol, 1 M in DCM) at room temperature. It was stirred at 50° C. in microwave for 10 minutes. To this mixture was added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (135 mg, 0.72 mmol). The resulting mixture was stirred at 60° C. in microwave for another 15 minutes. The reaction mixture was poured into ice-water, extracted with DCM. The combined organic phases were dried and concentrated to give the crude compound 6 (60 mg, crude), which was used in the next step without further purification.
To a solution of MeNHOH.HCl (60.56 mg, 0.73 mmol) in anhydrous MeOH (3 mL) was added NaOMe (35 mg, 0.65 mmol, 25 w % in MeOH), followed by compound 6 (60 mg, 0.145 mmol, crude). After being stirred for 1 h, the solvent was removed in vacuum. The residue was dissolved in DCM, and the mixture was filtered, and the solvent was removed in vacuum to give the crude product, which was purified by preparative TLC followed by preparative HPLC to give compound 408 (4.47 mg, 7%) and compound 403 (2 mg, 3%).
compound 408: 1H-NMR (400 MHz CD3OD): δ7.95 (m, 3H), 7.72 (m, 2H), 7.63 (m, 1H), 7.00-7.20 (m, 1H), 4.03 (s, 1H), 3.91 (m, 1H), 3.88 (m, 1H), 3.37 (m, 3H), 3.17 (m, 1H), 2.21 (d, 1H), 2.17 (m, 1H), 1.90 (m, 4H), 1.78 (m, 2H); ESI MS: m/z 417 [M+H]+.
compound 403: 1H-NMR (400 MHz CD3OD): δ7.99 (m, 2H), 7.95 (m, 1H), 7.73 (m, 2H), 7.64 (m, 1H), 7.00-7.20 (m, 1H), 3.92-4.05 (m, 1H), 3.62-3.74 (m, 2H), 3.31 (t, 3H), 3.13 (m, 1H), 2.35 (m, 1H), 2.19 (d, 1H), 1.85-2.15 (m, 4H), 1.78 (m, 2H); ESI MS m/z 417 [M+H]+.
By using the same strategy as compound 5, compound 7 was made (60 mg, 62%) from Isomer B.
By using the same synthetic strategy as compound 6, compound 8 was obtained (80 mg, crude).
By using the synthetic strategy for compound 408, compound 379 (9.44 mg, 13%) was obtained. 1H-NMR (400 MHz, CD3OD): δ7.98 (m, 1H), 7.91 (m, 2H), 7.73 (m, 1H), 7.65 (m, 1H), 7.60 (m, 1H), 7.07 (t, 1H), 3.93 (m, 2H), 3.85 (m, 1H), 3.34 (m, 3H), 2.97 (m, 1H), 2.24 (d, 1H), 2.10-2.18 (m, 2H), 1.72-1.87 (m, 4H), 1.60 (m, 1H); ESI MS: m/z 417 [M+11]+.
Preparation of Compound 1
A mixture of 3-bromo-5-chlorobenzonitrile (1 g, 4.74 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (1.3 g, 5.12 mmol), KOAc (1.366 g, 13.8 mmol) and Pd(dppf)Cl2 (236 mg) in 1,4-dioxane (30 mL) under Ar2 was stirred in microwave at 100° C. for 1.2 hours. The reaction mixture was concentrated in vacuo to give the residue, which was purified by chromatography to give compound 1 (70 mg, 7%).
A mixture of 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-4-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.13 mmol), 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (51.285 mg, 0.195 mmol), Cs2CO3 (2 M, 0.35 mL) and Pd(PPh3)2Cl2 (9.25 mg) in 1,4-dioxane (1.25 mL) under Ar2 was stirred in microwave at 120° C. for 35 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give compound 350 (1.34 mg, 2%). 1H-NMR (400 MHz CD3OD): δ7.91 (m, 1H), 7.89 (m, 2H), 7.65 (m, 2H), 6.94 (m, 1H), 3.88-4.01 (m, 3H), 3.38 (m, 2H), 3.27 (m, 3H), 2.36-2.60 (m, 1H), 1.72-1.94 (m, 3H), 1.54 (m, 3H); ESI MS: m/z 439 [M+H]+.
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (1.9 g, 8.88 mmol), octahydronaphthalen-1(2H)-one (900 mg, 5.92 mol) and pyrrolidine (546 mg, 7.69 mol) in toluene (30 mL) was refluxed overnight. The reaction mixture was removed in vacuum. The residue was diluted with H2O, and added HCl (PH=1). The mixture was extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4, filtered, and evaporated to give the compound 1 (474 mg, 15%). 1H NMR (400 MHz CDCl3): δ7.96 (m, 1H), 7.53 (m, 1H), 6.88 (m, 1H), 2.61-3.22 (m, 2H), 2.22 (m, 1H), 1.56-1.97 (m, 7H), 0.95-1.43 (m, 8H).
Pd(PPh3)2Cl2 (30 mg) in a 50 mL of flask under Ar2 was treated sequentially with the 6-bromo-3′,4′,4a′,5′,6′,7′,8′,8a′-octahydro-2′H-spiro[chroman-2,1′-naphthalen]-4-one (300 mg, 0.86 mmol) in 1,4-dioxane (6 mL), Cs2CO3 (2 N, 1.3 mL) and 3-cyanophenylboronic acid (235 mg, 1.29 mmol). The mixture was heated under 100° C. under Ar2 in a microwave for 6 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 2 (286 mg, 90%). 1H NMR (400 MHz CDCl3): δ8.01 (m, 1H), 7.76 (m, 2H), 7.63 (m, 1H), 7.54 (m, 1H), 7.46 (m, 1H), 7.01 (m, 1H), 2.52-3.21 (m, 2H), 2.23 (m, 1H), 1.89 (m, 2H), 1.69 (m, 4H), 1.53 (m, 2H), 1.38 (m, 4H), 1.26 (m, 2H), 1.13 (m, 1H), 0.98 (m, 2H).
A solution of 3-(4-oxo-3′,4′,4a′,5′,6′,7′,8′,8a′-octahydro-2′H-spiro[chroman-2,1′-naphthalene]-6-yl)benzonitrile (110 mg, 0.296 mmol) and TiCl4 (225 mg, 1.184 mmol) in anhydrous dichloromethane (5 mL) was heated at 50° C. under microwave for 5 minutes.
The bis-trimethylsilylcarbodiimide (110 mg, 0.592 mmol) was added and the mixture was heated at 60° C. for 20 min. The reaction mixture was poured into water, and extracted with dichloromethane. The combined organic phases were dried over anhydrous Na2SO4, filtered, and concentrated to give the compound 3 (145 mg, crude), which was used in the next step directly.
To a solution of methylhydroxylamine HCl salt (31 mg, 0.367 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25% in MeOH (Wt. %), 0.1 mL), followed by (E)-N-(6-(3-cyanophenyl)-3′,4′,4a′,5′,6′,7′,8′,8a′-octahydro-2′H-spiro[chroman-2,1′-naphthalne]-4-ylidene)cyanamide (145 mg, 0.367 mmol). After being stirred for 10 min., the solvent was removed in vacuo. The residue was redissolved in DCM (10 mL). The mixture was filtered and concentrated to give compound 443 1H-NMR (400 MHz CD3OD): δ8.02 (m, 1H), 7.95 (m, 1H), 7.70-7.74 (m, 1H), 7.62-7.69 (m, 2H), 6.99-7.15 (m, 1H), 3.36-3.43 (m, 3H), 2.95-3.25 (m, 1H), 2.35-2.49 (m, 1H), 1.97-2.04 (m, 3H), 1.74-1.81 (m, 3H), 1.74 (m, 2H), 1.58 (m, 2H), 1.48-1.57 (m, 3H), 1.05-1.47 (m, 3H); ESI MS: m/z 443 [M+H]+.
compound 416: δ8.02 (m, 1H), 7.96 (m, 2H), 7.70-7.74 (m, 1H), 7.62-7.68 (m, 2H), 7.03-7.18 (m, 1H), 3.32-3.39 (m, 3H), 2.75-2.94 (m, 1H), 2.20-2.50 (m, 1H), 1.97-2.15 (m, 3H), 1.75-1.93 (m, 3H), 1.68 (m, 2H), 1.59 (m, 2H), 1.44-1.50 (m, 3H), 1.29-1.33 (m, 3H); ESI MS: m/z 443 [M+H]+.
compound 394: δ8.01 (m, 1H), 7.94 (m, 2H), 7.63-7.74 (m, 3H), 7.01-7.17 (m, 1H), 3.35-3.42 (m, 3H), 2.75-3.03 (m, 1H), 2.42-2.58 (m, 1H), 1.96-2.24 (m, 2H), 1.73-1.95 (m, 6H), 1.48-1.68 (m, 3H), 1.15-1.37 (m, 5H); ESI MS: m/z 443 [M+H]+.
In a 500 mL dry three-neck flask under N2, 2,2,6,6-tetramethylpiperidine (14.6 mL, 86.4 mmol) was dissolved in dry THF (140 mL) and cooled to −10° C. before n-BuLi (2.5 M in hexane, 35 mL, 86.4 mmol) was added over 2 min. The mixture was stirred for 10 minutes before cooling to −78° C. At −78° C., B(O1Pr)3 (23.3 mL, 100.7 mmol) was added over 2 minutes, and stirred for 5 minutes at −78° C. before 2,6-difluorobenzonitrile (10 g, 71.9 mmol) dissolved in dry THF (75 mL) was added dropwise over 5 minutes. The reaction was left in the cooling bath overnight, slowly reaching room temperature. At room temperature, the reaction was quenched with glacial acetic acid (5.8 mL), followed by addition of 2,2-dimethyl-1,3-propandiol (11.2 g, 107.9 mmol). The mixture was stirred for 1 hour at room temperature, then transferred to a separating funnel by using ethyl acetate and the organic layer was washed with aqueous KH2PO4 (10 w/v %, 3×100 mL). The combined water phase was extracted with ethyl acetate. The combined organic layer was dried, and evaporated to give the crude product, which was purified by column chromatography to give compound 334a (8.9 g, 49%). 1H-NMR (400 MHz CDCl3): δ7.94-7.99 (m, 1H), 6.98-7.03 (t, 1H), 3.79 (s, 3H), 1.04 (s, 6H).
A mixture of 6-bromo-2′-methyl-2-(tetrahydro-2H-pyran-3-yl)-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.13 mmol), 3-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-2,6-difluorobenzonitrile (65 mg, 0.26 mmol), Cs2CO3 (2 M, 0.7 mL) and Pd(PPh3)2Cl2 (30 mg) in 1,4-dioxane (3 mL) under Ar2 was heated at 120° C. under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and preparative HPLC to give compound 334 (2.67 mg, 5%). 1H-NMR (400 MHz CD3OD): δ7.84-7.90 (m, 2H), 7.59-7.61 (t, 1H), 7.32-7.37 (t, 1H), 7.08 (t, 1H), 3.93-4.24 (m, 2H), 3.50-3.90 (m, 2H), 3.37-3.43 (m, 1H), 3.36 (s, 3H), 2.76-2.80 (m, 1H), 2.48-2.69 (m, 1H), 1.98-2.13 (m, 3H), 1.69-1.75 (m, 2H); ESI MS: m/z 441 [M+H]+.
A mixture of 1-(5-bromo-2-hydroxy-phenyl)-ethanone (600 mg, 2.8 mmol), 3-cyanophenylboronic acid (700 mg, 4.76 mmol), Cs2CO3 (2.8 mL, 2 M) and Pd(PPh3)2Cl2 (50 mg) in 1,4-dioxane (24 mL) was degassed, and stirred in microwave at 100° C. for 5 minutes. The organic layer was concentrated in vacuo to give the residue, which was purified preparative TLC to give the compound 320a (560 mg, 84%).
A mixture of 3′-acetyl-4′-hydroxy-biphenyl-3-carbonitrile (215 mg, 0.91 mmol), 7,8-dihydroquinolin-5(6H)-one (200 mg, 1.36 mmol) and pyrrolidine (97 mg, 1.36 mmol) in MeOH (5 mL) was refluxed overnight. The solvent was removed in vacuo to give the residue, which was purified by preparative TLC to give the compound 320b (55 mg, 16%). 1H-NMR (400 MHz CDCl3): δ8.81 (m, 1H), 8.58 (m, 1H), 8.09 (s, 1H), 7.76 (m, 4H), 7.56 (m, 2H), 7.04 (d, 1H), 3.32 (m, 2H), 3.28 (m, 1H), 2.94 (m, 1H), 2.21 (m, 3H), 1.96 (m, 1H).
To a solution of 3-(4-oxo-7′,8′-dihydro-6′H-spiro[chroman-2,5′-quinoline]-6-yl)benzonitrile (100 mg, 0.273 mmol) in CH2Cl2 (2 mL) under N2 was added TiCl4 (1 M solution in DCM, 1.1 mL, 1.1 mmol). It was stirred in microwave at 50° C. for 5 minutes.
Bis-trimethylsilylcarbodiimide (112 mg, 0.6 mmol) was added. The resulting mixture was stirred in microwave at 60° C. for 10 minutes. The reaction mixture was poured into ice-water, and extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give the compound 320c (100 mg, crude).
To a solution of methylhydroxylamine HCl salt (25 mg, 0.256 mmol) in anhydrous MeOH (5 mL) was added NaOMe (25% wt. in MeOH, 5 drops), and N-(6-(3-cyanophenyl)-7′,8′-dihydro-6′H-spiro[chroman-2,5′-quinoline]-4-ylidene)cyanamide (100 mg, 0.256 mmol). After being stirred for 10 minutes, the solvent was removed in vacuo.
The residue was redissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed to give the residue, which was purified by preparative HPLC to give compound 320 (4.99 mg, 2%). 1H-NMR (400 MHz CD3OD): δ8.55-8.92 (m, 2H), 7.92-8.47 (m, 3H), 7.42-7.91 (m, 4H), 7.15 (m, 1H), 3.56 (m, 1H), 3.38 (m, 3H), 2.95-3.24 (m, 3H), 2.56 (m, 1H), 2.02-2.42 (m, 3H); ESI MS m/z 438 [M+H]+.
To a solution of ethyl 4-oxocyclohexanecarboxylate (118 g, 0.69 mol) in MeOH (1 L) was added NaB H4 (44 g, 1.17 mol), and the mixture was stirred at room temperature for 3 hours. The reaction was quenched with water and extracted with EtOAc. The organic layer was washed with brine, dried over Na2SO4, and concentrated to give the compound 305a (105 g, 89%). 1H NMR (400 MHz CDCl3): δ4.10 (m, 2H), 3.52 (m, 1H), 2.32 (m, 1H), 1.89 (m, 4H), 1.48 (m, 4H), 1.21 (t, 3H).
To a solution of ethyl 4-hydroxycyclohexanecarboxylate (105 g, 0.61 mol) in DMF (700 mL) was added imidazole (83 g, 12.2 mol) and TBSCl (101 g, 0.67 mol). The resulting mixture was stirred overnight. Ether was added, and the aqueous layer was washed with 1 N HCl, and extracted ether. The combined organic layer was washed 1 N HCl and brine, dried over NaSO4, and concentrated to give the compound 305b (215 g, 100%).
A three necked flask was charged with THF (300 mL) and diisopropylamine (68.9 g, 0.68 mol). The mixture was cooled to −70° C., n-BuLi (2.5 M, 286 mL, 0.714 mol) was added via syringe, and the mixture was stirred 30 minutes. Ethyl 4-(tert-butyldimethylsilyloxy)cyclohexanecarboxylate (195 g, 0.68 mol) was added dissolved in THF (20 mL) at −70° C. After 1 hour stiffing, ethyl carbonochloridate (76.8 g, 0.7 mol) was added dropwise, and the reaction was stirred for 2 hours. The mixture was warmed to 0° C., and quenched with water, and extracted with EtOAc. The organic layer was washed with brine, 1 N HCl, water, dried, and concentrated to give the residue, which was purified by chromatography to afford the compound 305c (146 g, 60%). 1H NMR (400 MHz CDCl3): δ4.14 (m, 4H), 2.25 (m, 2H), 1.83 (m, 2H), 1.68 (m, 2H), 1.47 (m, 2H), 1.21 (m, 6H), 0.85 (s, 10H), 0.00 (s, 6H).
LiAlH4 (8 g, 0.21 mol) was suspended in 400 mL of dry THF in a ice-cooled bath, the solution of diethyl 4-(tert-butyldimethylsilyloxy)cyclohexane-1,1-dicarboxylate (50 g, 0.14 mol) dissolved in 150 mL of THF was added dropwise. After being stirred for 1 hour, 8 mL of H2O and 8 mL of 10% NaOH solution were added at 0° C. The mixture was stirred at room temperature and filtered. The filtrate was concentrated, and the residue was re-crystallized from petrol ether to afford the compound 305d (25 g, 68%). 1H NMR (400 MHz CDCl3): δ3.62 (m, 3H), 3.48 (s, 2H), 2.62 (s, 2H), 1.68 (m, 4H), 1.42 (m, 2H), 1.16 (m, 2H), 0.85 (s, 9H), 0.00 (s, 6H).
To a solution of (4-(tert-butyldimethylsilyloxy)cyclohexane-1,1-diyl)dimethanol (10 g, 37 mmol) and pyridine (5.85 g, 74 mmol) in CHCl3 (120 mL) in an ice-water bath was added TsCl (21 g, 111 mmol) in one portion. After being stirred for 20 minutes, the ice-water bath was removed, and the mixture was stirred at room temperature overnight.
The solution was diluted with CH2Cl2, washed with 1 N HCl, water and brine, dried, and concentrated. The residue was purified by chromatography to afford the compound 305e (18.5 g, 86%). 1H NMR (400 MHz CDCl3): δ7.70 (d, 4H), 7.33 (d, 4H), 3.82 (s, 2H), 3.79 (s, 2H), 3.58 (s, 1H), 2.47 (d, 6H), 1.53 (m, 2H), 1.27 (m, 6H), 0.85 (s, 9H), 0.00 (s, 6H).
To a solution of (4,4-bis(tosylmethyl)cyclohexyloxy)(tert-butyl)dimethylsilane (18.5 g, 31.8 mmol) in CH3CN (200 mL) was added 40% HF (45 mL), and the mixture was stirred at room temperature for 30 minutes. The reaction mixture was poured into the saturated aqueous NaHCO3 solution and extracted with EtOAc. The organic layer was dried and concentrated to give the compound 305f (14 g, 100%). 1H NMR (400 MHz CDCl3): δ7.66 (d, 4H), 7.23 (d, 4H), 3.81 (s, 2H), 3.68 (s, 2H), 3.59 (s, 1H), 2.41 (s, 6H), 1.92 (s, 1H), 1.56 (m, 4H), 1.22 (m, 4H).
To a solution of 4,4-bis(tosylmethyl)cyclohexanol (15 g, 34.5 mmol) in dry THF (500 ml) was added powdered NaOH (25 g, 625 mmol). The reaction mixture was stirred under reflux for 48 hours, cooled to room temperature, diluted with water, and extracted with EA. The organic layer was dried and concentrated to give the crude product, which was purified by chromatography to afford the compound 305g (6 g, 70%). 1H-NMR (400 MHz CDCl3): δ7.77 (d, 2H), 7.36 (d, 2H), 3.78 (m, 1H), 3.66 (s, 2H), 3.65 (s, 2H), 2.46 (s, 3H), 1.98 (m, 2H), 1.62 (m, 1H), 1.60 (m, 2H), 1.57 (m, 1H), 1.47 (m, 2H).
DMSO (30 mL) was heated to 150° C. for 10 min, and cooled to room temperature under N2. Toluene-4-sulfonic acid 2-oxa-bicyclo[2.2.2]oct-4-ylmethyl ester (1 g, 3.38 mmol) and NaHCO3 (2.83 g, 33.8 mmol) were added. The mixture was heated to 150° C. for 4 hours. After being cooled to room temperature, the mixture was treated with water and ethyl acetate. The organic layer was washed with water and brine, dried, and concentrated to give the crude product, which was purified by preparative TLC to give the compound 305h (200 mg, 42%). 1H-NMR (400 MHz CDCl3): δ9.41 (s, 1H), 3.89 (m, 2H), 3.85 (m, 1H), 2.10 (m, 2H), 1.85 (m, 2H), 1.75 (m, 2H), 1.62 (m, 4H).
A solution of 2-oxa-bicyclo[2.2.2]octane-4-carbaldehyde (200 mg, 1.43 mmol), 1-(5-bromo-2-hydroxy-phenyl)-ethanone (307 mg, 1.43 mmol) and Na2B4O7.10H2O (545 mg, 1.43 mmol) in a mixture of ethanol (6 mL) and water (10 mL) was reflux for overnight. The mixture was concentrated. The residue was added water and ethyl acetate.
The organic layer was dried, and concentrated to give the crude product, which was purified by preparative TLC to give the compound 305i (320 mg, 67%).
A mixture of Pd(PPh3)2Cl2 (66 mg, 0.095 mmol), 6-bromo-2-(2-oxa-bicyclo[2.2.2]oct-4-yl)-chroman-4-one (320 mg, 0.95 mmol), Cs2CO3 (2 N, 4.75 mL, 9.5 mmol) and 3-cyanophenylboronic acid (281 mg, 1.9 mmol) in 1,4-dioxane (3 mL) was stirred at 100° C. in microwave for 20 minutes. The reaction mixture was treated with ethyl acetate and water. The organic layer was concentrated in vacuo to give the crude product, which was purified by preparative TLC to give the compound 10 (70 mg, 20%).
To a solution of 3-[2-(2-oxa-bicyclo[2.2.2]oct-4-yl)-4-oxo-chroman-6-yl]-benzonitrile (70 mg, 0.19 mmol) in anhydrous DCM (5 mL) was added TiCl4 (0.98 mL, 0.98 mmol, 1 M in DCM) at room temperature. The mixture was stirred at 50° C. in microwave for 10 minutes. To this mixture was added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (182 mg, 0.98 mmol). The resulting mixture was stirred at 60° C. in microwave for another 15 minutes. The reaction mixture was poured into ice-water, and extracted with DCM. The combined organic phases were dried and concentrated to give the crude compound 305k (70 mg, 94%), which was used in the next step without further purification.
To a solution MeNHOH.HCl (76.32 mg, 0.91 mmol) in anhydrous MeOH (2 mL) was added NaOMe (44.4 mg, 0.82 mmol, 25 w % in MeOH) and 6-(3-cyano-phenyl)-2-(2-oxa-bicyclo[2.2.2]oct-4-yl)-chroman-4-ylidene-cyanamide (70 mg, 0.18 mmol, crude). After being stirred for 2 hours, the solvent was removed in vacuum, and the residue was dissolved in DCM. The mixture was filtered, and the solvent was removed in vacuum to give the crude product, which was purified by preparative TLC and preparative HPLC to give compound 305 (1.22 mg, 2%) 1H-NMR (400 MHz CD3OD): δ7.98 (s, 1H), 7.92 (d, 2H), 7.70 (t, 2H), 7.61 (t, 1H), 7.03 (d, 1H), 4.03 (d, 1H), 3.96 (d, 1H), 3.81 (m, 2H), 3.35 (s, 3H), 2.60 (d, 1H), 2.07 (m, 2H), 1.90 (m, 3H), 1.75 (m, 4H); ESI MS: m/z 431 [M+H]+ and compound 345 (0.51 mg, 1%). 1H-NMR (400 MHz CD3OD): δ7.86 (s, 1H), 7.80 (d, 1H), 7.74 (s, 1H), 7.57 (t, 2H), 7.51 (t, 3H), 6.90 (d, 1H), 3.93 (m, 1H), 3.85 (s, 1H), 3.71 (m, 2H), 3.38 (s, 3H), 3.03 (m, 2H), 1.97 (m, 2H), 1.75 (m, 2H), 1.65 (m, 4H); ESI MS: m/z 431 [M+H]+.
2,6-Dimethyl-4H-pyran-4-one (12 g, 96.8 mmol) was dissolved in ethanol (60 mL), and 10% Pd/C (1.2 g) was added. The mixture was hydronated under H2 (30 Psi) at room temperature for 24 hours, passed through celite, and concentrated under reduced pressure at 30° C. to give the compound 319a (12 g, crude).
To a solution of witting reagent (46.3 g, 135 mmol) in THF (375 mL) at 0° C. was added dropwise a solution of 2.5 M n-BuLi (in hexane, 25.3 mL). The reaction mixture was warmed to room temperature, stirred for 1 hour, recooled to 0° C., and added a solution of 2,6-dimethyldihydro-2H-pyran-4(3H)-one (12 g, 93.8 mmol) in THF (60 mL) dropwise.
The reaction mixture was stirred at 0° C. for 3 hours. The reaction mixture was concentrated under reduced pressure at about 25-30° C. The crude product was purified by silica gel column to give the compound 319b (2.3 g, 16%). 1H-NMR (400 MHz CDCl3): δ5.79-5.80 (t, 1H), 3.53 (s, 3H), 2.59-2.68 (m, 1H), 1.88-1.95 (m, 1H), 1.70-1.82 (m, 1H), 1.50-1.59 (m, 1H), 1.20 (d, 3H, J=6.4 Hz), 1.18 (d, 3H, J=6.0 Hz).
A solution of 4-(methoxymethylene)-2,6-dimethyltetrahydro-2H-pyran (2.1 g, 13.7 mmol) in a mixture of HCl (2 M, 64 mL) and H2O (21 mL) was refluxed for 2 hours. The mixture was extracted by CH2Cl2, after drying and concentration, the crude compound 319c (1.9 g) was obtained.
The mixture of 1-(5-bromo-2-hydroxyphenyl)ethanone (2.9 g, 13.5 mmol), 2,6-dimethyltetrahydro-2H-pyran-4-carbaldehyde (1.9 g, 13.5 mmol) and borax (5.1 g, 13.5 mmol) in a mixture of ethanol (17 mL) and water (29 mL) was refluxed overnight. The reaction mixture was cooled by ice-water bath and dissolved in EtOAc. The organic layer was separated and concentrated to give the residue, which was purified by silica gel column to give the pure compound 319d (2.9 g, 64%).
Pd(PPh3)2Cl2 (20.7 mg, 0.03 mmol) in a tube under Ar2 was treated sequentially with 6-bromo-2-(2,6-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-one (200 mg, 0.59 mmol), 3-cyanophenylboronic acid (173.5 mg, 1.18 mmol) in [1,4]-dioxane (23.6 mL) and Cs2CO3 (2 M, 3.54 mL). The mixture was heated at 100° C. under Ar2 for 5 minutes in a microwave reactor. The reaction mixture was extracted with EtOAc, concentrated, and purified by preparative TLC to give compound 319e (140 mg, 66%). 1H-NMR (400 MHz CDCl3): δ8.09 (s, 1H), 7.81-7.85 (m, 1H), 7.75-7.80 (m, 1H), 7.66-7.72 (m, 1H), 7.56-7.62 (m, 1H), 7.48-7.55 (m, 1H), 7.05-7.10 (m, 1H), 4.20-4.30 (m, 1H), 3.71-3.76 (m, 1H), 3.42-3.58 (m, 2H), 2.71-2.78 (m, 1H), 2.01-2.11 (m, 1H), 1.89-1.95 (m, 1H), 1.61-1.69 (m, 1H), 1.20-1.28 (m, 6H), 1.05-1.19 (m, 2H).
A solution of 3-(2-(2,6-dimethyltetrahydro-2H-pyran-4-yl)-4-oxochroman-6-yl)benzonitrile (70 mg, 0.19 mmol) and TiCl4 (258 mg, 1.36 mmol) in CH2Cl2 (7 mL) was heated at 50° C. for 5 minutes in a microwave. Then N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (0.17 mL, 0.78 mmol) was added and heated at 60° C. for 10 minutes in a microwave. CH2Cl2 was added, and the solution was extracted with dichloromethane. The CH2Cl2 was removed under reduced pressure to give the crude compound 319f (80 mg).
To a solution of N-methylhydroxylamine hydrochloride (18.9 mg, 0.23 mmol) in anhydrous MeOH (2.65 mL) was added NaOMe (25% w % in MeOH, 44.2 uL) and (E)-N-(6-(3-cyanophenyl)-2-(2,6-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-ylidene)cyanamide (80 mg, 0.23 mmol). After being stirred for 1 hour, the solvent was removed in vacuo. The residue was redissolved in CH2Cl2 (10 mL), and filtered, and the solvent was removed in vacuo to give the crude product, which was purified by preparative TLC to give compound 319 (6.53 mg, 7.3%). 1H-NMR (400 MHz CD3OD): δ7.80-7.91 (m, 3H), 7.56-7.65 (m, 2H), 7.48-7.55 (m, 1H), 6.91-6.98 (m, 1H), 3.91-4.05 (m, 1H), 3.40-3.51 (m, 2H), 3.28-3.34 (m, 3H), 2.55-2.65 (m, 1H), 1.86-2.05 (m, 2H), 1.80-1.85 (m, 1H), 1.60-1.65 (m, 1H), 1.13 (d, 6H, J=6.0 Hz), 0.95-1.10 (m, 2H); ESI MS: m/z 433 [M+H]+.
2,6-Dimethylhepta-2,5-dien-4-one (90 g) was dissolved in 1 N HCl (700 mL), and the mixture was stirred for seven days at 40° C. The mixture was extracted with ether, and the organic phase was concentrated. The residue was purified by distillation to afford the compound 327a (26 g, 20%). 1H-NMR (400 MHz CDCl3): δ2.38 (s, 4H), 1.29 (s, 12H).
To a solution of (methoxymethyl)-triphenylphosphonium chloride (40 g, 115 mmol) in anhydrous THF (50 mL) was added n-BuLi (41 ml, 103 mmol) dropwise at −78° C. The mixture was warmed to room temperature and stirred for 1 hour at room temperature. 2,2,6,6-Tetramethyldihydro-2H-pyran-4(3H)-one (10 g, 64 mmol) was added, and the mixture was stirred for another 2 h. The reaction was quenched by sat. NH4Cl solution, and extracted with EtOAc. The combined organic phase was dried over anhydrous Na2SO4 and concentrated. The residue was purified by column chromatography to afford the compound 327b (5.3 g, 45%). 1H-NMR (400 MHz CDCl3): δ5.85 (s, 1H), 3.50 (s, 3H), 2.10 (s, 2H), 1.82 (s, 2H), 1.12 (s, 12H).
To a solution of 4-(methoxymethylene)-2,2,6,6-tetramethyltetrahydro-2H-pyran (5.3 g) was added 2 N HCl (30 mL). The mixture was refluxed for 3 h, TLC showed that the reaction was completed. The mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium bicarbonate, dried over anhydrous sodium sulfate, and concentrated to get the product. 1H-NMR (400 MHz CDCl3): δ9.62 (s, 1H), 2.73 (m, 1H), 2.01 (m, 1H), 1.86 (m, 1H), 1.78 (m, 2H), 1.69 (m, 2H), 1.31 (m, 2H), 1.22 (m, 12H).
A mixture of 1-(5-bromo-2-hydroxyphenyl)-ethanone (8.2 g, 37.9 mmol), 2,2,6,6-tetramethyltetrahydro-2H-pyran-4-carbaldehyde (3.2 g, 18.9 mmol) and borax (7.2 g) was dissolved in ethanol:water=3:5 (80 mL), and the mixture was refluxed overnight. The solvent was removed in vacuum, water and EtOAc were added. The combined organic phase was dried over Na2SO4 and concentrated. The residue was purified by silica gel column to afford the compound 327d (3.5 g, 51%). 1H-NMR (400 MHz CDCl3: δ7.93 (m, 1H), 7.50 (m, 1H), 6.83 (m, 1H), 4.11 (m, 1H), 2.62 (d, 2H), 2.19 (m, 1H), 1.78 (d, 1H), 1.52 (m, 1H), 1.20 (m, 14H), 1.12 (m, 1H).
A mixture of 6-bromo-2-(2,2,6,6-tetramethyltetrahydro-2H-pyran-4-yl)chroman-4-one (150 mg), 3-cyanophenylboronic acid (90 mg), Cs2CO3 (2 M, 1 mL) and Pd(PPh3)2Cl2 (30 mg) in 1,4-dioxane (5 mL) under N2 was stirred in microwave at 100° C. for 5 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give the compound 327e (80 mg, 51%).
To a solution of 3-(4-oxo-2-(2,2,6,6-tetramethyltetrahydro-2H-pyran-4-yl) chroman-6-yl)benzonitrile (80 mg, 0.207 mmol) in dichloromethane (5 mL) was added titanium (IV) chloride (0.2 mL, 1 M solution in dichloromethane) dropwise, and the mixture was stirred in microwave for 5 minutes at 50° C. This mixture was added compound N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (77 mg, 0.415 mmol) dropwise. The resulting mixture was stirred in microwave for 10 minutes at 60° C. The reaction mixture was poured into ice-water, and extracted with dichloromethane. The organic phase was dried over anhydrous sodium sulfate, and concentrated to give the product.
To a solution of N-methylhydroxylamine hydrochloride (16 mg, 0.194 mmol) in anhydrous methanol (1 mL) was added sodium methanolate (25% in methanol, 94 mg, 0.174 mmol), and ((E)-N-(6′-(3-cyanophenyl)-5,7,8,9-tetrahydrospiro[benzo[7]-annulene-6,2′-chroman]-4′-ylidene)-cyanamide (80 mg, 0.194 mmol). After being stirred for 10 minutes, the solvent was removed in vacuum. The residue was redissolved in dichloromethanae. The mixture was filtrated, concentrated, and purified by preparative TLC and HPLC to give compound 327 (3.94 mg, 4%). 1H-NMR (400 MHz CD3OD): δ8.01 (m, 3H), 7.75 (m, 2H), 7.66 (m, 1H), 7.09 (m, 1H), 4.13 (m, 1H), 3.42 (m, 3H), 2.56 (m, 1H), 2.37 (m, 1H), 2.07 (m, 1H), 1.94 (m, 1H), 1.70 (m, 1H), 1.40 (m, 1H), 1.23 (m, 12H); ESI MS: m/z 461 [M+H]+.
After the mixture was stirred at 50° C. under Ar2 in microwave for 5 minutes, N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (108 mg, 0.58 mmol) was added dropwise. The mixture was stirred at 60° C. under Ar2 in microwave for 10 minutes, and poured into ice-water (50 mL). The aqueous layer was extracted with CH2Cl2. The organic layer was dried and concentrated to give the crude compound 402a (50 mg, crude).
To a solution of N-methyl-hydroxylamine hydrochloride (11.3 mg, 0.14 mmol) in MeOH (3 mL) was added MeONa (0.029 mL, 25% in MeOH) and (E)-N-(6-bromo-3′,4′-dihydro-2′H-spiro[chroman-2,1′-naphthalene]-4-ylidene)cyanamide (50 mg, 0.14 mmol). After being stirred for 10 minutes, the solvent was removed in vacuo, and the residue was purified by preparative TLC to give the compound 402b (20 mg, 35%).
Pd(PPh3)2Cl2 (5 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with compound 402b (20 mg, 0.058 mmol) in [1,4]dioxane (2.0 mL), Cs2CO3 (2 N, 1 mL) and 3,5-difluorophenylboronic acid (15.8 mg, 0.1 mmol). The mixture was heated under 100° C. under Ar2 in microwave for 5 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and HPLC to give compound 402 (1.44 mg, 7%). 1H-NMR (400 MHz CD3OD): δ7.98 (s, 1H), 7.72 (d, 1H), 7.54 (m, 1H), 7.28 (m, 4H), 7.17 (m, 1H), 7.01 (d, 1H), 6.90 (m, 1H), 3.38 (s, 3H), 3.02 (m, 1H), 2.87 (m, 2H), 2.53 (m, 1H), 2.45 (m, 1H), 2.03 (m, 1H), 1.86 (m, 2H); ESI MS: m/z 448 [M+H]+.
1-(5-Bromo-2-hydroxyphenyl)-ethanone (7 g, 34 mmol) and 3,4-dihydronaphthalen-2(1H)-one (5 g, 34 mmol) were dissolved in toluene (150 mL), and pymolidine (4.9 g, 69 mmol) was added. The reaction mixture was refluxed overnight, concentrated, washed with water, and extracted with EtOAc. The organic phase was dried and concentrated to give the crude product, which was purified by a silica gel column to afford the compound 324a (500 mg, 5%). 1H-NMR (400 MHz CDCl3): δ7.92 (s, 1H), 7.46 (d, 1H), 7.10 (m, 3H), 6.97 (d, 1H), 6.75 (d, 1H), 3.12 (d, 1H), 2.92 (d, 2H), 2.81 (d, 1H), 2.72 (d, 2H), 2.20 (m, 1H), 1.85 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) under Ar2 was treated sequentially with the 6-bromo-3′,4′-dihydro-1′H-spiro[chroman-2,2′-naphthalen]-1′-one (150 mg, 0.44 mmol) in [1,4]dioxane (4 mL), Cs2CO3 (2 N, 1 mL) and 3-cyanophenylboronic acid (119 mg, 0.66 mmol). The mixture was heated at 120° C. in microwave for 20 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give the compound 324b (60 mg, 38%). 1H-NMR (400 MHz CDCl3): δ8.15 (s, 1H), 7.45-7.80 (m, 6H), 6.95-7.19 (m, 4H), 3.19 (d, 2H), 2.92 (m, 3H), 2.75 (m, 2H), 2.28 (m, 1H), 1.89 (m, 1H).
To a solution of 3-(4-oxo-3′,4′-dihydro-1′H-spiro[chroman-2,2′-naphthalene]-6-yl)benzonitrile (80 mg, 0.22 mmol) in dried CH2Cl2 (5 mL) was added TiCl4 (1 M solution in DCM, 0.88 mmol) dropwise within 15 minutes, and the mixture was stirred for 1 h. bis-Trimehtlysilylcarbodiimide (164 mg, 0.88 mmol) was added dropwise, and the resulting mixture was stirred overnight. The reaction mixture was poured into ice-water, extracted with CH2Cl2, washed with brine, dried over Na2SO4, filtered, and concentrated to give compound 324c (70 mg, crude), which was used for the next step without further purification.
To a solution of MeNHOH.HCl (15 mg, 0.18 mmol) in anhydrous MeOH (3 mL) was added NaOMe (25 wt % in MeOH, 35 mg, 0.0.16 mmol), followed by (E)-N-(6-(3-cyanophenyl)-3′,4′-dihydro-1′H-spiro[chroman-2,2′-naphthalene]-4-ylidene)cyanamide (70 mg, 0.18 mmol). After being stirred for 5 minutes, the solvent was removed in vacuum. The residue was re-dissolved in CH2Cl2 and filtered. The filtrate was concentrated to give the residue, which was purified by preparative TLC and preparative HPLC to afford compound 324 (10.15 mg, 13%). 1H NMR (400 MHz CD3OD): δ7.89 (m, 3H), 7.58 (m, 3H), 7.04 (m, 4H), 6.88 (m, 1H), 3.29 (d, 3H), 3.13 (m, 3H), 2.73 (m, 2H), 2.22 (m, 2H), 1.96 (m, 1H); ESI MS: m/z 437 [M+H]+.
A mixture of compound 1-(5-bromo-2-hydroxyphenyl)-ethanone (2 g, 9.3 mmol), 1H-inden-2(3H)-one (2.46 g, 18.6 mmol) and pyrrolidine (0.99 g, 1.2 mL) in toluene (20 mL) was refluxed overnight, concentrated, washed with 1 M HCl, extracted with dichloromethane, dried over anhydrous sodium sulfate, and concentrated to afford 2.3 g of the crude product. 500 mg the crude product was purified by preparative TLC to afford the compound 315a (100 mg). 1H-NMR (400 MHz CD3OD): δ7.90 (s, 1H), 7.57 (d, 1H), 7.16 (m, 4H), 6.83 (d, 1H), 3.31 (s, 1H), 3.29 (m, 2H), 3.17 (d, 2H), 3.03 (s, 2H).
A mixture of 6-bromo-1′,3′-dihydrospiro[chroman-2,2′-inden]-4-one (100 mg, 0.30 mmol), 3-cyanophenylboronic acid (83 mg, 0.46 mmol), Cs2CO3 (2 M, 0.5 mL) and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (3 mL) under N2 was stirred in microwave at 100° C. for 20 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC to give compound 315b (40 mg, 37%). 1H-NMR (400 MHz CDCl3): δ8.04 (s, 1H), 7.77 (s, 1H), 7.74 (d, 1H), 7.42-7.63 (m, 4H), 7.19 (m, 3H), 6.81 (d, 1H), 3.37 (d, 2H), 3.12 (d, 2H), 2.97 (s, 2H).
To a solution of 3-(4-oxo-1′,3′-dihydrospiro[chroman-2,2′-indene]-6-yl)benzonitrile (40 mg, 0.11 mmol) in dichloromethane (2 mL) was added titanium (IV) chloride (1 M solution in dichloromethane, 43 mg, 0.23 mmol) dropwise, and the mixture was stirred in microwave for 20 minutes at 50° C. To this mixture was added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (64 mg, 0.34 mmol) dropwise. The resulting mixture was stirred in microwave for 10 minutes at 60° C. The reaction mixture was poured into ice-water, extracted with dichloromethane. The organic phase was dried over anhydrous sodium sulfate, and concentrated to give the compound 315c, which was used directly for the next step.
To a solution of N-methylhydroxylamine hydrochloride (14 mg, 0.16 mmol) in anhydrous methanol (2 ml) was added sodium methanolate (25% in methanol, 0.026 mL, 0.12 mmol), and (E)-N-(6-(3-cyanophenyl)-1′,3′-dihydrospiro[chroman-2,2′-indene]-4-ylidene)cyanamide (50 mg, 0.13 mmol). After being stirred 10 min, the solvent was removed in vacuum, and the residue was redissolved in dichloromethanae (10 mL), after filtration and concentration, the residue was purified by preparative TLC to give compound 315. 1H-NMR (400 MHz CDCl3): δ7.76 (s, 1H), 7.72 (s, 1H), 7.60 (s, 1H), 7.42 (s, 4H), 7.38 (m, 3H), 7.18 (m, 4H), 6.76 (d, 1H), 3.15-3.36 (m, 6H), 3.12 (s, 3H); ESI MS: m/z 423 [M+H]+.
A suspension of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (320 mg, 0.84 mmol) and Lawesson's Reagent (340.2 mg, 0.84 mmol) in dry 1,4-dioxane (4 mL) was heated at 120° C. for 30 minutes in microwave. The mixture was concentrated in vacuo and the residue was purified by preparative TLC to give the compound 273a (300 mg, 90%).
To a solution of 6-bromo-2-(tetrahydro-2H-pyran-3-yl)-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (120 mg, 0.3 mmol) in MeOH (16 mL) was added NaOH (0.6 N, 1.2 mL) and MeI (0.3 mL). The reaction mixture was heated at 60° C. for 8 minutes in microwave. The mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC to give the compound 273b (80 mg, 60%).
A solution of 6-bromo-1′-methyl-2′-(methylthio)-2-(tetrahydro-2H-pyran-3-yl)-spiro[chroman-4,4′-imidazol]-5′(1′H)-one (75 mg, 0.177 mmol), NH4I (200 mg) in NH3/EtOH (2 mL, 8 N) was heated at 120° C. in a tube in a microwave reactor for 2 hours. After cooling, the mixture was concentrated in vacuum to afford the compound 273c (70 mg, 100%).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with a solution of 2′-amino-6-bromo-1′-methyl-2-(tetrahydro-2H-pyran-3-yl)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (35 mg, 0.089 mmol) in 1,4-dioxane (2 mL), Cs2CO3 solution (2 N, 0.4 mL), and 3-cyanophenylboronic acid (25 mg, 0.18 mmol). This mixture was heated in microwave at 12° C. for 30 min, and concentrated in vacuo to give the residue, which was purified by preparative TLC and preparative HPLC to give compound 273 (4.9 mg, 10%). 1H-NMR (400 MHz CD3OD): δ7.58 (m, 1H), 7.41 (m, 2H), 7.29 (m, 2H), 7.01 (m, 2H), 4.68 (dd, 0.7H), 4.21 (m, 0.6H), 3.88 (dd, 1.6H), 3.49 (m, 2H), 3.31 (m, 3H), 3.10 (m, 2H), 2.41 (m, 1H), 2.24 (m, 1H), 1.97 (m, 2H), 1.68 (m, 2H); ESI MS: m/z 410 [M+H]+.
By using the same synthetic strategy for compound 273 described in Example 169, compound 267 (2.74 mg, 5%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.94 (d, 1H), 7.86 (m, 1H), 7.61 (m, 1H), 7.50 (m, 1H), 7.21 (m, 2H), 7.05 (m, H), 6.89 (m, 1H), 4.70&4.40 (m, 1H), 3.88 (dd, 2H), 3.49 (m, 2H), 3.24 (s, 3H), 3.08 (t, 2H), 2.48 (m, 1H), 2.18 (t, 1H), 1.97 (m, 2H), 1.68 (m, 2H); ESI MS: m/z 428 [M+H]+.
By using the same strategy for compound 273 described in Example 169, compound 230 (2.00 mg, 10%) and compound 453 (1.81 mg, 9%) were obtained.
compound 230: 1H-NMR (400 MHz CD3OD): δ7.89 (m, 2H), 7.53-7.68 (m, 3H), 7.38-7.50 (m, 1H), 7.06 (d, 1H), 4.51 (m, 1H), 3.77 (m, 2H), 3.25-3.22 (m, 3H), 2.44 (m, 1H), 2.18 (m, 2H), 1.90 (m, 1H), 1.63 (m, 1H), 1.33 (m, 2H), 1.24-1.28 (m, 6H); ESI MS: m/z 445 [M+H]+
compound 453: 1H-NMR (400 MHz CD3OD): δ7.86-7.94 (m, 2H), 7.48-7.67 (m, 6H), 7.08 (d, 1H), 4.58 (m, 1H), 3.76 (m, 2H), 3.06 (m, 3H), 2.46 (m, 1H), 2.13 (m, 2H), 1.89 (m, 1H), 1.61 (m, 1H), 1.45 (m, 2H), 1.27-1.39 (m, 6H); ESI MS: m/z 889 [2M+H]+.
To a vigorously stirred mixture of Bu4NI (33.2 g, 90 mmol) in a mixture of 5% aqueous NaHCO3 solution (1200 mL) and CH2Cl2 (280 mL) was added dropwise at room temperature a solution of 1,2-bis(bromomethyl)benzene (39.3 g, 15 mmol) and diethyl 3-oxopentanedioate (39.4 g, 1.3 mmol) in CH2Cl2 (280 mL). After 21 h, the reaction mixture was quenched with aqueous NH4Cl solution, and the organic layer was separated, dried, and evaporated in vacuo, purified by silica gel column to give compound 451a (40 g, crude).
A mixture of 7-oxo-6,7,8,9-tetrahydro-5H-benzo[7]annulene-6,8-dicarboxylate (27.8 g, 91.0 mmol), NaOH (8%, 480 mL) in ethanol (730 mL) was refluxed for 2.5 h, the mixture was concentrated to removed to remove most ethanol, and then extracted with CH2Cl2. The combined organic layer was washed with H2O and brine, dried over Na2SO4, filtered, and concentrated to give the compound 451b (10 g, 69%).
1-(5-Bromo-2-hydroxyphenyl)-ethanone (2.14 g, 10 mmol), pyrroidine (1.065 g, 15 mmol) and 3-(4-oxo-3′,4′-dihydro-2′H-spiro[chroman-2,1′-naphthalene]-6-yl)benzonitrile (2.4 g, 15 mmol) was dissolved in CH3OH (20 mL), the mixture was refluxed for 24 hour. The mixture was poured into ice-water (20 mL), extracted with EA for (3×15 mL), washed with brine (20 mL), dried over Na2SO4, and concentrated in vacuo to give the crude product, which was purified by silica gel column to give the compound 451c (1.21 g, 34%). 1H-NMR (400 MHz CDCl3): δ7.93 (s, 1H), 7.51 (d, 1H), 7.15 (m, 1H), 7.05 (m, 4H), 6.89 (d, 1H), 3.20 (m, 2H), 2.63 (m, 2H), 2.43 (m, 2H), 2.26 (m, 2H), 1.55 (m, 2H).
Pd(PPh3)2Cl2 (5 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with 6′-bromo-5,6,8,9-tetrahydrospiro[benzo[7]annulene-7,2′-chroman]-4′-one (150 mg, 0.42 mmol) in [1,4]dioxane (2.0 mL), Cs2CO3 solution (2 N, 1 mL), and 3-cyanophenylboronic acid (124 mg, 0.84 mmol). The mixture was heated at 100° C. under Ar2 in microwave for 5 minutes. The reaction mixture was concentrated, and purified by preparative TLC to give the compound 451d (40 mg, 25%).
To a solution of 3-(4′-oxo-5,6,8,9-tetrahydrospiro[benzo[7]annulene-7,2′-chroman]-6′-yl)benzonitrile (40 mg, 0.1 mmol) in DCM (6 mL) was added TiCl4 (37.6 mg, 0.2 mmol) dropwise, and the mixture was stirred at 50° C. under Ar2 in microwave for 5 minutes. N,N′-Methanediylidenebis(1,1,1-trimethylsilanamine) (37 mg, 0.2 mmol) was added dropwise, the mixture was stirred at 60° C. under Ar2 in microwave for 10 minutes and poured into ice-water (50 mL). The aqueous layer was extracted with CH2Cl2, the organic layer was dried and concentrated to give the crude compound 451e (30 mg, 71%).
To a solution of N-methyl-hydroxylamine hydrochloride (6.2 mg, 0.07 mmol) in MeOH (2 mL) was added MeONa (0.014 mL, 25% in MeOH), and (E)-N-(6-(3-cyanophenyl)-3′,4′-dihydro-2′H-spiro[chroman-2,1′-naphthalene]-4-ylidene)cyanamide (30 mg, 0.07 mmol). After being stirred for 20 minutes, the solvent was removed in vacuo, and the residue was purified by preparative TLC to give compound 451 (6.5 mg, 13%). 1H-NMR (400 MHz CDCl3): δ7.88 (m, 3H), 7.53-7.69 (m, 3H), 7.00 (m, 5H), 3.28 (s, 3H), 2.80-3.07 (m, 2H), 2.24-2.63 (m, 4H), 2.02 (m, 2H), 1.53-1.84 (m, 2H); ESI MS: m/z 451 [M+H]+.
A solution of n-BuLi (88 mL, 2.5 M) was added to a mixture of PPh3CH3+Me− (100 g, 246 mmol) in THF (600 mL) at −10° C. After the mixture was stirred for 1 h at the this temperature, 3,4-dihydronaphthalen-1(2H)-one (20 g, 137 mmol) was added. The mixture was warmed to room temperature and stirred for 3 hours, concentrated, and purified by column chromatography to afford the compound 217a (9.6 g, 49%). 1H-NMR (400 MHz CDCl3): δ7.64 (d, 1H), 7.17 (m, 2H), 7.15 (m, 1H), 5.48 (s, 1H), 4.95 (s, 1H), 2.83 (t, 2H), 2.53 (t, 2H), 1.91 (m, 2H).
Crystalline HT1B (18.9 g, 48.1 mmol) was added to a stirred solution of 1-methylene-1,2,3,4-tetrahydronaphthalene (6.6 g, 45.8 mmol) in 95% methanol (200 mL).
The mixture was stirred for 20 minutes at room temperature, and the solvent was removed in vacuo. The mixture was partitioned between dichloromethane and water, and the organic phase was concentrated in vacuo, the residue was purified by a silica gel column to afford the compound 217b (3.9 g, 53%). 1H-NMR (400 MHz CDCl3): δ7.19 (m, 4H), 3.72 (s, 2H), 2.94 (t, 2H), 2.53 (t, 2H), 1.99 (m, 2H).
A mixture of 8,9-dihydro-5H-benzo[7]annulen-6(7H)-one (2 g, 12.5 mmol), 1-(5-bromo-2-hydroxyphenyl)ethanone (5.4 g, 25.0 mmol) and pyrrolidine (1.3 g, 1.5 ml) in toluene (50 mL) was refluxed overnight. The resulting mixture was concentrated, and the residue was washed with 1 M HCl, extracted with dichloromethane, dried over anhydrous sodium sulfate and concentrated to afford 2.3 g crude product. The crude product was purified by flash column chromatography on silica gel to afford the compound 217c (1 g, 22%). 1H-NMR (400 MHz CDCl3): δ7.91 (s, 1H), 7.76 (d, 1H), 7.08 (m, 3H), 6.75 (d, 1H), 6.68 (d, 1H), 3.21 (d, 1H), 3.00 (d, 1H), 2.75 (m, 2H), 2.52 (m, 2H), 2.10 (t, 2H), 1.87 (m, 1H), 1.52 (m, 1H).
A mixture of 6′-bromo-5,7,8,9-tetrahydrospiro[benzo[7]annulene-6,2′-chroman]-4′-one (100 mg, 0.28 mmol), 3-cyanophenylboronic acid (102 mg, 0.56 mmol), Cs2CO3 (2
M, 0.5 mL) and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (3 mL) under N2 was stirred in microwave at 100° C. for 20 minutes. The reaction mixture was concentrated in vacuo, the residue was purified by preparative HPLC to afford the compound 217d (80 mg, 75%). 1H-NMR (400 MHz CDCl3): δ8.04 (s, 1H), 7.77 (s, 1H), 7.74 (d, 1H), 7.55 (m, 4H), 7.19 (m, 3H), 6.81 (d, 1H), 3.37 (d, 2H), 3.12 (d, 2H), 2.97 (s, 2H), 2.54 (m, 1H).
To a solution of 6′-(3-bromophenyl)-5,7,8,9-tetrahydrospiro[benzo[7]annulene-6,2′-chroman]-4′-one (80 mg, 0.21 mmol) in dichloromethane (2 mL) was added titanium(IV) chloride (1 M solution in dichloromethane, 161 mg, 0.85 mmol) dropwise, and the mixture was stirred in microwave for 20 minutes at 50° C. The mixture was added N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (118 mg, 0.85 mmol) dropwise, and stirred in microwave for 10 minutes at 60° C. The reaction mixture was poured into ice-water, and extracted with dichloromethane. The organic phase was dried over anhydrous sodium sulfate and concentrated to give the product 217e.
To a solution of N-methylhydroxylamine hydrochloride (18 mg, 0.21 mmol) in anhydrous methanol (2 mL) was added sodium methanolate (25% in methanol, 0.041 mL, 0.19 mmol), and ((E)-N-(6′-(3-cyanophenyl)-5,7,8,9-tetrahydrospiro[benzo[7]annulene-6,2′-chroman]-4′-ylidene)-cyanamide (85 mg, 0.21 mmol). After being stirred for 10 minutes, the solvent was removed in vacuum, and the residue was redissolved in dichloromethanae (10 mL). After filtration, the solvent was removed, the residue was purified by preparative TLC and preparative HPLC to give compound 217 (2.80 mg, 2.9%). 1H-NMR (400 MHz CD3OD): δ7.78 (m, 1H), 7.53 (m, 4H), 7.07 (m, 4H), 6.62-6.70 (m, 1H), 3.35 (m, 1H), 3.02 (m, 1H), 2.97 (d, 3H), 2.74 (m, 3H), 2.42 (m, 1H), 1.95 (m, 3H), 1.52 (m, 1H); ESI MS: m/z 451 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the solution of 3-(3′-amino-6-bromo-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazole]-2-yl)-5-methylhex-4-en-1-ol (35 mg, 0.085 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.3 mL), and 2,5-difluorophenylboronic acid (26.8 mg, 0.17 mmol). The mixture was heated in microwave at 12° C. for 20 minutes. The reaction mixture was concentrated in vacuo, the residue was purified by preparative TLC and preparative HPLC to give compound 434 (5 mg, 10%). 1H-NMR (400 MHz CDCl3): δ8.70 (bs, 2H), 7.49-7.61 (m, 2H), 6.84-7.05 (m, 4H), 4.88-5.12 (m, 1H), 4.02-4.23 (m, 1H), 3.55-3.72 (d, 2H), 3.24 (d, 3H), 2.74 (s, 1H), 2.34-2.51 (m, 1H), 2.05 (m, 1H), 1.84 (m, 1H), 1.68 (m, 6H), 1.42 (s, 1H), 1.21 (d, 1H); ESI MS: m/z 444 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 341 (8.13 mg, 36%) & compound 384 (0.99 mg, 12%) were obtained.
compound 341: 1H-NMR (400 MHz CD3OD): δ7.82 (d, 1H), 7.60 (m, 1H), 7.23 (m, 2H), 7.12 (m, 2H), 4.09 (m, 1H), 3.78 (m, 2H), 3.38 (m, 3H), 2.68 (d, 1H), 2.22 (m, 1H), 1.85-1.95 (m, 2H), 1.68 (m, 1H), 1.32-1.50 (m, 2H), 1.28 (d, 6H); ESI MS: m/z 444 [M+H]+,
compound 384: 1H-NMR (400 MHz CD3OD): δ7.82 (d, 1H), 7.60 (m, 1H), 7.23 (m, 2H), 7.12 (m, 2H), 4.09 (m, 1H), 3.78 (m, 2H), 3.38 (m, 3H), 2.68 (m, 1H), 2.22 (m, 1H), 1.85-1.95 (m, 2H), 1.68 (m, 1H), 1.32-1.50 (m, 2H), 1.28 (d, 6H); ESI MS: m/z 444 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 456 was obtained (5.31 mg, 14%). 1H-NMR (400 MHz CDCl3): δ7.19-7.71 (m, 3H), 6.80-7.15 (m, 3H), 4.91-5.07 (m, 1H), 3.98-4.33 (m, 1H), 3.65-3.75 (m, 1H), 3.50-3.60 (m, 1H), 3.20-3.30 (s, 3H), 2.70-2.80 (t, 1H), 2.20-2.60 (m, 6H), 1.70-1.80 (d, 3H), 1.55-1.65 (d, 3H); ESI MS: m/z 444 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 365 (2.40 mg, 8%) and compound 362 (0.79 mg, 3%) were obtained.
compound 365: 1H-NMR (400 MHz CD3OD): δ7.83 (s, 1H), 7.63 (d, 1H), 7.49 (m, 1H), 7.38 (m, 1H), 7.27 (m, 1H), 6.99 (d, 1H), 4.04 (m, 1H), 3.74 (m, 2H), 3.34 (m, 3H), 2.65 (d, 1H), 2.16 (m, 1H), 1.98 (m, 1H), 1.84 (m, 1H), 1.62 (m, 1H), 1.41 (m, 2H), 1.22 (d, 6H); ESI MS: m/z 444 [M+H]+.
compound 362: 1H-NMR (400 MHz CD3OD): δ7.86 (s, 1H), 7.64 (d, 1H), 7.52 (m, 1H), 7.32 (m, 2H), 7.03 (d, 1H), 4.06 (m, 1H), 3.78 (m, 2H), 3.43 (m, 3H), 2.68 (d, 1H), 2.18 (m, 1H), 1.94 (m, 2H), 1.63 (m, 1H), 1.47 (m, 1H), 1.37 (m, 1H), 1.23 (m, 6H); ESI MS: m/z 444 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 404 (1.92 mg, 5%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.88 (s, 1H), 7.62 (m, 1H), 7.48 (m, 1H), 7.32 (m, 1H), 7.13 (m, 1H), 6.99 (m, 1H), 5.06 (m, 1H), 4.29 & 4.07 (m, 1H), 3.63 (m, 1H), 3.51 (m, 1H), 3.37 (m, 3H), 2.88 (m, 1H), 2.57 (m, 1H), 2.15 (m, 1H), 1.88 (m, 1H), 1.72 (m, 6H); ESI MS: m/z 460 [M+H]+.
By using the same synthetic strategy for compound 434 described in Example 174, compound 295 (3.07 mg, 9%) and compound 299 (1.18 mg, 3%) were obtained.
compound 295: 1H-NMR (400 MHz CD3OD): δ7.92 (s, 1H), 7.68 (d, 1H), 7.48 (m, 1H), 7.36 (d, 1H), 7.14 (d, 1H), 7.02 (m, 1H), 4.05 (m, 1H), 3.74 (m, 2H), 3.39 (m, 3H), 2.64 (d, 1H), 2.16 (m, 1H), 1.96 (m, 1H), 1.84 (m, 1H), 1.62 (m, 1H), 1.42 (m, 2H), 1.23 (m, 6H); ESI MS: m/z 460 [M+H]+.
compound 299: 1H-NMR (400 MHz CD3OD): δ7.89 (s, 1H), 7.67 (m, 1H), 7.44 (m, 1H), 7.31 (m, 1H), 7.14 (m, 1H), 6.99 (m, 1H), 4.04 (m, 1H), 3.72 (m, 2H), 3.46 (m, 3H), 2.18 (m, 1H), 1.98 (m, 1H), 1.84 (m, 1H), 1.62 (m, 1H), 1.41 (m, 2H), 1.22 (m, 6H); ESI MS: m/z 460 [M+H]+.
By using the same synthetic strategy as compound 434 described in Example 174, compound 377 (2.56 mg, 5%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.98 (s, 1H), 7.82 (m, 1H), 7.71 (m, 2H), 7.50 (m, 1H), 7.12 (m, 1H), 5.16 (m, 1H), 5.01 (m, 1H), 4.32 (m, 0.5H), 4.12 (m, 0.5H), 3.66 (m, 1H), 3.52 (m, 1H), 3.48 (s, 3H), 2.79 (m, 1H), 2.61 (m, 1H), 1.86-2.20 (m, 2H), 1.76 (m, 6H), 1.45 (m, 1H); ESI MS: m/z 451 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 260 was obtained (2.31 mg, 10%). 1H-NMR (400 MHz CD3OD): δ8.03 (m, 1H), 7.88 (m, 1H), 7.74 (m, 2H), 7.52 (m, 1H), 7.03 (m, 1H), 4.09 (m, 1H), 3.78 (m, 2H), 3.44 (m, 3H), 2.51-2.67 (m, 1H), 1.82-2.32 (m, 3H), 1.38-1.72 (m, 3H), 1.28 (m, 6H); ESI MS: m/z 451 [M+H]+.
By using the same strategy as compound 434 described in Example 174, compound 344 (2.7 mg, 12%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.86 (m, 1H), 7.62 (m, 1H), 7.12 (m, 3H), 4.12 (m, 1H), 3.82 (m, 2H), 3.41 (m, 3H), 2.61 (m, 1H), 2.23 (m, 1H), 1.98 (m, 2H), 1.64 (m, 1H), 1.42 (m, 2H), 1.29 (m, 6H); ESI MS: m/z 462 [M+H]+.
By using the same synthetic strategy as compound 434 described in Example 174, compound 420 (3.19 mg, 8%), compound 392 (0.49 mg, 1%), and compound 441 (1.18 mg, 3%) were obtained.
compound 420: 1H NMR (400 MHz CD3OD): δ7.82 (s, 1H), 7.62 (d, 1H), 7.03-7.18 (m, 3H), 5.15 (m, 1H), 4.11-4.31 (m, 1H), 3.63 (m, 1H), 3.54 (m, 1H), 3.32 (s, 3H), 2.91 (m, 1H), 2.61 (m, 1H), 1.87-2.18 (m, 2H), 1.76 (d, 6H), 1.51 (m, 1H); ESI MS: m/z 462 [M+H]+.
compound 392: 1H NMR (400 MHz CD3OD): δ7.82 (d, 1H), 7.57 (t, 1H), 6.98-7.21 (m, 3H), 4.93-5.14 (m, 1H), 4.10-4.35 (m, 1H), 3.63 (m, 1H), 3.54 (m, 1H), 3.37 (d, 3H), 2.89 (m, 1H), 2.62 (m, 1H), 2.33 (m, 0.5H), 1.88-2.19 (m, 2H), 1.76 (d, 6H), 1.51 (m, 1H).
compound 441: 1H NMR (400 MHz CD3OD): δ7.82 (d, 1H), 7.56 (m, 1H), 6.98-7.19 (m, 3H), 5.12 (m, 1H), 4.38 (m, 1H), 3.64 (m, 1H), 3.56 (m, 1H), 3.45 (s, 0.5H), 3.37 (d, 3H), 3.13 (m, 0.5H), 2.88 (m, 1H), 2.49 (m, 1H), 2.32 (m, 1H), 2.08 (m, 1H), 1.92 (m, 1H), 1.72 (t, 6H), 1.48 (m, 1H); ESI MS: m/z 462 [M+H]+.
By using the same synthetic strategy as compound 434 described in Example 174, compound 436a (6.61 mg, 16%) and compound 436b (1.30 mg, 3%) were obtained.
compound 436a: 1H-NMR (400 MHz CD3OD): δ7.86 (d, 1H), 7.66 (dd, 1H), 7.41 (m, 2H), 7.32 (d, 1H), 7.01 (m, 2H), 4.97-5.13 (m, 1H), 4.01-4.35 (m, 1H), 3.63 (m, 1H), 3.52 (m, 1H), 3.34 (d, 3H), 2.87 (m, 1H), 2.45-2.66 (m, 1H), 2.12 (m, 1H), 2.05 (t, 1H), 1.90 (m, 1H), 1.76 (d, 3H), 1.71 (d, 3H), 1.40-1.65 (m, 1H); ESI MS: 426 [M+H]+.
compound 436b: 1H-NMR (400 MHz CD3OD): δ7.86 (m, 1H), 7.67 (m, 1H), 7.41 (m, 2H), 7.34 (t, 1H), 7.01 (m, 2H), 4.95-5.15 (m, 1H), 4.01-4.35 (m, 1H), 3.65 (m, 1H), 3.52 (m, 1H), 3.34-3.45 (d, 3H), 2.90 (m, 1H), 2.50-2.70 (m, 1H), 2.30 (t, 1H), 2.15 (m, 1H), 1.92 (m, 1H), 1.78 (d, 3H), 1.72 (d, 3H), 1.48 (m, 1H); ESI MS: 426 [M+H]+.
By using the same synthetic strategy as compound 434 described in Example 174, compound 339 (4.73 mg, 22%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.92 (m, 1H), 7.69 (m, 1H), 7.25 (m, 2H), 6.92 (m, 1H), 6.67 (m, 1H), 4.29 (m, 1H), 3.67 (m, 3H), 3.40 (m, 3H), 2.84 (m, 1H), 2.46 (m, 2H), 2.04 (m, 1H), 1.88 (m, 3H), 1.69 (m, 3H), 1.42-1.24 (m, 2H); ESI MS: m/z 444 [M+H]+.
By using the same synthetic strategy as compound 434 described in Example 174, compound 421 (2.38 mg, 7%), compound 444 (1.05 mg, 3%), and compound 419 (0.51 mg, 1.5%) were obtained; ESI MS: m/z 444 [M+H]+.
compound 421: 1H-NMR (400 MHz CD3OD): δ7.93 (m, 1H), 7.72 (m, 1H), 7.25 (m, 2H), 7.05 (m, 1H), 6.90 (m, 1H), 5.0-5.2 (m, 2H), 4.1-4.4 (m, 1H), 3.62 (m, 1H), 3.62 (m, 1H), 3.51 (m, 1H), 3.43 (m, 3H), 2.9 (m, 1H), 2.51-2.74 (m, 1H), 2.0-2.2 (m, 2H), 1.75-1.80 (m, 6H), 1.45-1.50 (m, 1H); ESI MS: m/z 444 [M+H]+.
compound 444: 1H-NMR (400 MHz CD3OD): δ7.85 (m, 1H), 7.55-7.65 (m, 1H), 7.19 (m, 2H), 6.97 (m, 1H), 6.82 (m, 1H), 4.0-4.25 (m, 1H), 3.62 (m, 1H), 3.61 (m, 1H), 3.51 (m, 2H), 3.35 (m, 1H), 3.23 (m, 3H), 2.84 (m, 1H), 2.25-2.50 (m, 1H), 2.23 (m, 1H), 1.65-1.70 (m, 6H), 1.30-1.45 (m, 2H); ESI MS: m/z 444 [M+H]+.
compound 419: 1H-NMR (400 MHz CD3OD): δ7.93 (m, 1H), 7.67 (m, 1H), 7.25 (m, 2H), 6.80-7.01 (m, 2H), 4.44 (m, 1H), 3.56-3.65 (m, 3H), 3.45 (m, 3H), 2.90 (m, 1H), 2.3-2.50 (m, 2H), 2.22 (m, 1H), 1.65-1.70 (m, 6H), 1.45 (m, 2H); ESI MS: m/z 444 [M+H]+.
The isophthalic acid (19.8 g, 300 mmol) was taken up in concentrated H2SO4 (136 mL) and heated at 60° C. To this solution was added NBS (64.4 g, 360 mmol) in three portions every 20 minutes. When the reaction was completed based on TLC analysis, the mixture was poured into crushed ice (300 g) to get the solid. After filtration, the mixture was washed with water and hexane, and dried to give compound 248a (51 g, 70%). 1H-NMR (400 MHz DMSO-d6): δ8.35-8.40 (s, 1H), 8.20-8.30 (s, 2H).
A solution of 5-bromo-isophthalic acid (48 g, 197 mmol) in tulene was added SOCl2 (48 mL) and DMF (4 mL) at room temperature over 10 minute. The reaction mixture was refluxed for 3.5 hr and cooled to ° C. The reaction mixture was added dropwise to NH4OH (400 mL) for 1 hr. The mixture was filtered to give the compound 248b (42 g, 87.5%). 1H-NMR (400 MHz DMSO-d6): δ8.30-8.40 (s, 1H), 8.10-8.20 (m, 4H), 7.50-7.60 (s, 2H).
To a solution of dry DMF in dry CH3CN at −5° C. to 0° C. under a nitrogen atmosphere was added (ClCO)2 over 10 minutes. After being stirred for 15 minutes, 5-bromo-isophthalamide (42 g, 174 mmol) was added in one portion, and the mixture was stirred at ° C. for 1.5 hrs. Pyridine was added dropwise over 5 minutes, and the mixture was stirred at 0° C. for 2 hrs. 1 M HCl (80 mL) was added, and the mixture was extracted with ether (200 mL) for 2 times. The organic layer was concentrated in vacuo to give the compound 248c (28 g, 78.2%). 1H-NMR (400 MHz CDCl3): δ8.00-8.10 (s, 2H), 7.70-7.80 (s, 1H).
A solution of 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (5.96 g, 24 mmol), 5-bromo-isophthalonitrile (4.52 g, 22 mmol), KOAc (6.28 g, 64 mmol) and PdCl2(dppf)2 in DMSO (30 mL). The mixture was degassed, heated at 8° C. for 4 hr. Water (20 mL) was added, and the mixture was extracted with ether (40 mL) for 3 times. The organic layer was added 1N HCl (20 mL), dried over Na2SO4 and concentrated in vacuo to give the compound 248d (0.6 g, 10%). 1H-NMR (400 MHz DMSO-d6): δ8.60-8.70 (s, 2H), 8.45-8.50 (s, 1H), 8.30-8.40 (s, 2H).
By using the same strategy as compound 434 as described in Example 174, compound 248 (2.22 mg, 6%) was obtained. 1H-NMR (400 MHz CD3OD): δ8.32-8.34 (m, 2H), 8.10-8.20 (m, 2H), 7.70-7.80 (m, 1H), 7.00-7.10 (m, 1H), 3.77 (m, 1H), 3.43-3.45 (m, 2H), 3.31-3.32 (m, 3H), 2.68-2.71 (m, 1H), 1.41-1.23 (m, 5H), 1.20-1.35 (m, 7H); ESI MS: m/z 458 [M+H]+.
By using the same strategy as compound 434 as described in Example 174, compound 297 (7.44 mg, 32%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.85 (m, 3H), 7.71 (m, 1H), 7.66 (m, 2H), 7.00 (m, 1H), 4.0 (m, 1H), 3.77 (m, 2H), 3.30 (m, 3H), 2.69 (m, 1H), 2.20 (m, 1H), 1.88-2.10 (m, 2H), 1.63 (m, 1H), 1.47 (m, 2H), 1.26 (m, 6H); ESI MS: m/z 476 [M+H]+.
By using the same strategy as compound 434 as described in Example 174, compound 442 (4.31 mg, 10%), compound 450 (1.23 mg, 3%), and compound 423 (0.65 mg, 2%) were obtained.
compound 442: 1H NMR (400 MHz CD3OD): δ7.88 (m, 3H), 7.70 (d, 1H), 7.59 (d, 2H), 7.04 (d, 1H), 5.13 (d, 1H), 5.02 (d, 1H), 4.19-4.33 (m, 1H), 3.61 (d, 2H), 3.37 (s, 3H), 2.86 (m, 1H), 2.61 (m, 1H), 1.82-2.18 (m, 2H), 1.75 (d, 6H), 1.51 (m, 1H); ESI MS: m/z 476 [M+H]+.
compound 450: 1H NMR (400 MHz CD3OD): δ7.82 (m, 3H), 7.58 (m, 3H), 6.96 (m, 1H), 5.03 (m, 0.6H), 4.21 (m, 0.5H), 4.01 (m, 1H), 3.52 (m, 2H), 3.31 (d, 3H), 2.81 (m, 1H), 2.48 (m, 1H), 2.23 (m, 1H), 1.82-2.10 (m, 2H), 1.67 (d, 6H), 1.38 (m, 1H); ESI MS: m/z 476 [M+H]+.
compound 423: 1H NMR (400 MHz CD3OD): δ7.79 (m, 3H), 7.63 (m, 3H), 6.95 (t, 1H), 5.06 (m, 1H), 4.22 (m, 1H), 3.45-3.52 (m, 2H), 3.30 (d, 3H), 2.72 (m, 2H), 2.48 (m, 1H), 2.23 (m, 0.5H), 1.97 (m, 0.5H), 1.83 (m, 1H), 1.66 (t, 6H), 1.23 (m, 1H); ESI MS: m/z 476 [M+H]+.
By using the same strategy as compound 434 as described in Example 174, compound 412 (5.16 mg, 12%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.85-7.95 (m, 1H), 7.66-7.72 (m, 1H), 7.61-7.65 (m, 1H), 7.52-7.60 (m, 1H), 7.40-7.48 (m, 1H), 7.31-7.38 (m, 1H), 7.04-7.05 (m, 1H), 4.98-5.20 (m, 2H), 4.09-4.39 (m, 1H), 3.62-3.75 (m, 1H), 3.56-3.61 (m, 1H), 3.38 (s, 3H), 2.90-2.94 (m, 1H), 2.57-2.70 (m, 1H), 2.07-2.21 (m, 1H), 1.90-2.06 (m, 1H), 1.81-1.83 (m, 3H), 1.75-1.77 (m, 3H), 1.48-1.70 (m, 1H); ESI MS: m/z 442 [M+H]+.
By using the same strategy as compound 434 as described in Example 174, compound 264 (2.20 mg, 10%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.85 (m, 1H), 7.64 (m, 1H), 7.59 (m, 1H), 7.50 (m, 1H), 7.39 (t, 1H), 7.32 (m, 1H), 7.01 (d, 1H), 4.03 (m, 1H), 3.76 (d, 2H), 3.32-3.42 (m, 3H), 2.67 (d, 1H), 2.18 (m, 1H), 1.98 (m, 1H), 1.86 (m, 1H), 1.63 (m, 1H), 1.25-1.50 (m, 2H), 1.23 (d, 6H); ESI MS: m/z 442 [M+H]+.
Pd(PPh3)4 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with a solution of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (50 mg, 0.12 mmol) in THF (5 mL), K2CO3 (2 N, 0.1 mL) and 3-bromophenylboronic acid (24.6 mg, 0.12 mmol). The mixture was refluxed overnight, and concentrated in vacuo, the residue was purified by preparative TLC and preparative HPLC to give compound 294 (1.62 mg, 3%). 1H-NMR (400 MHz CD3OD): δ7.84 (m, 1H), 7.75 (s, 1H), 7.66 (m, 1H), 7.56 (t, 1H), 7.48 (m, 1H), 7.34 (t, 1H), 7.02 (m, 1H), 4.01-4.12 (m, 1H), 3.73 (m, 2H), 3.38 (d, 3H), 2.67 (d, 1H), 2.10-2.26 (m, 1H), 1.98 (t, 1H), 1.72-1.90 (m, 1H), 1.61-1.69 (m, 1H), 1.36-1.49 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 488 [M+3H]+.
Under nitrogen, 2,2,6,6-tetramethylpiperidine (7.1 g, 49.6 mmol) was dissolved in dry THF (100 mL) and cooled to −10° C. before n-BuLi (2.5 M in hexane, 19.8, 49.6 mmol) was added in 2 minutes. The mixture was stirred for 10 minutes, cooled down to −78° C., added B(Oi-Pr)3 (10.8 g, 57.4 mmol) in 2 minutes, stirred for 5 minutes, added the solution of 4-fluorobenzonitrile (5 g, 41 mmol) in dry THF (140 mL) dropwise in 5 minutes. The reaction mixture was left in the cooling bath overnight, slowly warmed to room temperature, quenched with glacial acetic acid (3.3 mL), added of 2,2-dimethyl-1,3-propandiol (6.4 g, 61.5 mmol), stirred for 1 hr at room temperature, added ethyl acetate, and washed with aqueous KH2PO4 solution (10 w/v %, 3×100 mL). The water phase was extracted with ethyl acetate, and the combined organic layer was dried and evaporated to give the crude product, which was recrystallize to give the compound 1 (1 g, 10%). 1H-NMR (CDCl3): δ8.00 (m, 1H), 7.62 (m, 1H), 7.03 (m, 1H), 3.75 (d, 4H), 1.01 (s, 6H).
By using the procedure for compound 434 as described in Example 174, compound 391 (5.38 mg, 2.6%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.91 (m, 1H), 7.71-7.88 (m, 2H), 7.63 (m, 1H), 7.38-7.43 (m, 1H), 7.04 (d, 1H), 4.48-5.12 (m, 1H), 4.08-4.35 (m, 1H), 3.44-3.69 (m, 2H), 3.34 (m, 3H), 2.89 (m, 1H), 2.49-2.65 (m, 1H), 1.84-2.19 (m, 2H), 1.68-1.73 (m, 6H), 1.51 (m, 1H), 1.26 (m, 1H); ESI MS: m/z 451 [M+H]+.
By using the same procedure for compound compound 434 as described in Example 174, compound 261 (1.52 mg, 4%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.68 (d, 1H), 7.56 (m, 2H), 7.47 (m, 1H), 7.18 (m, 1H), 6.91 (d, 1H), 4.03 (m, 1H), 3.71 (m, 1H), 3.66 (m, 1H), 3.31 (m, 1H), 3.27 (s, 3H), 2.34-2.56 (m, 1H), 1.92-2.23 (m, 2H), 1.65-1.87 (m, 1H), 1.56 (m, 1H), 1.48 (m, 1H), 1.33 (m, 1H), 1.23 (m, 3H), 1.18 (m, 3H); ESI MS: m/z 451 [M+H]+.
A stirred solution of 3-bromo-4-methylbenzonitrile (3.5 g, 17.86 mmol) in dry THF was added n-BuLi (10.71 m L) solution dropwise at −78° C., and the mixture was stirred for 15 minutes, followed by the addition of triisopropyl borate (6.71 g, 35.71 mmol) in one portion. The reaction flask was kept in a cooling bath for 30 min, and room temperature for 3 hours. The solvent was removed, and the residue was dissolved in ether. The solution was washed with 1N HCl solution and water, dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by recrystallyzation from the mixture of CH2Cl2 and hexane to give 5-cyano-2-methylphenylboronic acid (800 mg, 20%). 1H-NMR (CDCl3 400 MHz): δ7.50-7.78 (m, 2H), 7.30 (d, 1H), 2.42 (d, 3H).
By using the same procedure for compound 434 as described in Example 174, compound 425 (5 mg, 10%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.48 (t, 2H), 7.38 (m, 2H), 7.16 m, 1H), 6.88 (d, 1H), 5.06 (d, 1H), 4.89 (d, 1H), 4.03-4.28 (m, 1H), 3.54-3.72 (m, 2H), 3.18-3.32 (m, 3H), 2.72 (m, 1H), 2.15-2.32 (m, 8H), 1.61-1.73 (m, 6H); ESI MS: m/z 447 [M+H]+.
By using the same procedure as compound 434 as described in Example 174, compound 292 (5 mg, 10%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.54-7.62 (m, 1H), 7.52 (d, 1H), 7.45 (d, 1H), 7.32-7.38 (m, 1H), 7.00 (t, 1H), 4.05 (d, 1H), 3.76 (m, 2H), 3.36 (s, 3H), 2.63 (d, 1H), 2.41-2.58 (m, 0.4H), 2.31 (s, 3H), 2.11-2.27 (m, 1H), 2.04 (t, 1H), 1.82-1.92 (m, 1H), 1.61-1.69 (m, 1H), 1.40-1.52 (m, 1H), 1.34 (t, 1H), 1.22-1.31 (m, 6H); ESI MS: m/z 447 [M+H]+.
A solution of 3-nitro-4-(trifluoromethyl)benzoic acid (10 g, 43 mmol) in EtOH (100 mL) was added Pd/C (1 g, 10%). The reaction was carried under H2 at room temperature overnight. The solution was filtered, and the filtrate was concentrated to give the compound 354a (10.2 g, crude). 1H NMR (400 MHz DMSO-d6): δ7.42 (s, 2H), 7.08 (s, 1H), 5.82 (s, 2H).
3-Amino-4-(trifluoromethyl)benzoic acid (10.2 g, 0.05 mol) was dissolved in a solution of 47% HBr (40 mL) in H2O (80 mL). A solution of NaNO2 (4.12 g, 0.06 mol) in H2O (40 mL) was added dropwise at 0° C. After being stirred for 30 minutes, the mixture was added the solution of CuBr (12.16 g, 0.085 mol) in a mixture of HBr (40 mL) and
H2O (60 mL) at 0° C. and heated at 75° C. for 2 h, treated with 20% NaOH until PH>10. The resulting copper salts were removed by filtration. The mixture was acidified to PH=1 with HCl solution, extracted with DCM, dried over Na2SO4, filtered, and concentrated to give the crude compound 354b (9.4 g, 70%). 1H NMR (400 MHz DMSO-d6): δ8.27 (m, 1H), 8.09 (m, 1H), 7.98 (d, 1H).
A solution of 3-bromo-4-(trifluoromethyl)benzoic acid (9.4 g, 35 mmol) in SOCl2 (60 mL) was refluxed for 2 hours. After removal of the extra SOCl2, NH3.H2O (40 mL) was added dropwise at −50° C., and the mixture was stirred at room temperature overnight. The mixture was concentrated, added H2O, extracted with DCM. The organic layer was dried and concentrated to give the compound 354c (10.2 g, crude).
To a solution of 3-bromo-4-(trifluoromethyl)benzamide (5 g. 18.7 mmol) in DCM (50 mL) was added TFAA (11.75 g, 56 mmol) and DIEA (12 g, 94 mmol) at 0° C., and the mixture was stirred at ° C. for 2 hour. The solution was washed by 1 N HCl, water and brine, dried, and concentrated, the residue was purified by chromatography to afford the compound 354d (2.3 g, 49%). 1H NMR (400 MHz CDCl3): δ7.94 (s, 1H), 7.73 (t, 1H), 7.66 (t, 1H).
To a solution of 3-bromo-4-(trifluoromethyl)benzonitrile (288 mg, 0.91 mmol) in 1,4-dioxane (8 mL) was added 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (254 mg, 1 mmol), KOAc (268 mmol, 2.74 mmol) and Pd(dppf)Cl2 under N2. The reaction mixture was heated at 100° C. in microwave for 1 hour, and filtered. The filtration was concentrated, and the residue was purified by preparative TLC to afford the compound 354e (83 mg, 31%). 1H NMR (400 MHz CDCl3): δ7.97 (s, 1H), 7.72 (m, 2H), 1.30 (s, 12H).
By using the same procedure for compound 434 as described in Example 174, compound 354 (5.12 mg, 21%) was obtained. 1H NMR (400 MHz CD3OD): δ7.98 (m, 2H), 7.77 (s, 1H), 7.63 (m, 1H), 7.42 (m, 1H), 7.02 (m, 1H), 4.12 (m, 1H), 3.79 (m, 2H), 3.48 (s, 3H), 2.71 (d, 1H), 2.51 (m, 1H), 2.24 (m, 1H), 2.07 (t, 1H), 1.95 (m, 1H), 1.68 (m, 1H), 1.49 (m, 2H), 1.38 (d, 6H); ESI MS: m/z 501 [M+H]+.
Preparation of Compound 430
By using the same strategy for compound 434 as described in Example 174, compound 430 (6.1 mg, 12%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.68 (m, 3H), 7.46 (m, 1H), 7.32 (m, 1H), 6.92 (m, 1H), 5.02 (m, 1H), 4.38 (m, 1H), 4.21 (m, 0.5H), 3.98 (m, 0.5H), 3.52 (m, 1H), 3.41 (m, 1H), 3.24 (m, 3H), 2.78 (m, 1H), 2.48 (m, 1H), 1.75-2.09 (m, 2H), 1.65 (m, 6H), 1.45 (m, 1H); ESI MS: m/z 451 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 312 and compound 306 (5.50 mg, 25%) were obtained.
compound 312: 1H-NMR (400 MHz CD3OD): δ7.82-7.84 (d, 2H), 7.77-7.80 (d, 1H), 7.70-7.73 (t, 1H), 7.56-7.60 (d, 1H), 7.40-7.42 (t, 1H), 7.02-7.06 (t, 1H), 4.05-4.08 (t, 1H), 3.72-3.77 (m, 2H), 3.28-3.39 (m, 3H), 2.65-2.69 (m, 1H), 2.17-2.18 (m, 1H), 2.01-2.02 (m, 1H), 1.83-1.86 (m, 1H), 1.62-1.65 (m, 1H), 1.44-1.48 (m, 1H), 1.33-1.36 (m, 1H), 1.24-1.30 (m, 6H); ESI MS: m/z 451 [M+H]+.
compound 306: 1H-NMR (400 MHz CD3OD): δ7.82-7.84 (d, 2H), 7.77-7.80 (d, 1H), 7.70-7.73 (t, 1H), 7.56-7.60 (d, 1H), 7.40-7.42 (t, 1H), 7.02-7.06 (t, 1H), 4.05-4.08 (t, 1H), 3.73-3.78 (m, 2H), 3.33-3.46 (m, 3H), 2.65-2.69 (m, 1H), 2.17-2.18 (m, 1H), 2.01-2.02 (m, 1H), 1.83-1.86 (m, 1H), 1.62-1.65 (m, 1H), 1.44-1.48 (m, 1H), 1.33-1.36 (m, 1H), 1.24-1.30 (m, 6H); ESI MS: m/z 451 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 257 (0.5 mg, 3%) was obtained. 1H-NMR (400 MHz CD3OD): δ8.31 (s, 1H), 8.22 (s, 1H), 8.05 (s, 1H), 7.73-7.81 (d, 1H), 7.08-7.11 (d, 1H), 4.08-4.12 (m, 2H), 3.74-3.82 (m, 2H), 3.44-3.49 (m, 3H), 2.66-2.74 (m, 1H), 2.13-2.31 (m, 2H), 1.96-2.08 (t, 1H), 1.80-1.92 (m, 1H), 1.62-1.69 (m, 1H), 1.38-1.51 (m, 1H), 1.22-1.30 (m, 6H); ESI MS: m/z 501 [M+H]+.
A glass tube was charged with a mixture of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)chroman-4-one (3 g, 8.88 mmol), KCN (1.14 g, 17.76 mmol), and (NH4)2CO3 (5.96 g, 62.12 mmol). After formamide (20 mL) was added to fill the tube completely, the mixture was heated at 70° C. for 2 days and at 110° C. for 1 day, cooled, and poured into ice. After acidification with concentrated HCl solution, the precipitate was filtered, washed with water, solved in ethyl acetate, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the compound 300a (2.6 g, 70%). 1H-NMR (400 MHz CDCl3): δ8.61 (br, 1H, CONH), 7.20-7.29 (m, 2H), 6.71-6.74 (m, 1H), 6.03-6.05 (m, 1H), 4.47-4.52 (m, 1H), 3.66-3.77 (m, 1H), 3.58-3.64 (m, 1H), 2.15-2.18 (m, 1H), 1.89-1.98 (m, 1H), 1.64-1.76 (m, 2H), 1.30-1.50 (m, 2H), 1.14-1.21 (m, 6H).
A suspension of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)spiro[chroman-4,4′-imidazolidine]-2′,5′-dione (2.6 g, 6.37 mmol) and Lawesson's
Reagent (2.574 g, 6.36 mmol) in dry 1,4-dioxane (36 mL) was heated at 120° C. for 30 minutes in microwave. The mixture was concentrated in vacuo and the residue was purified by column chromatography to give the compound 300b (1.4 g, 50%).
To a solution of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-2′-thioxospiro-[chroman-4,4′-imidazolidin]-5′-one (1.4 g, 3.3 mmol) in MeOH (70 mL) was added NaOH (0.6 N, 12 mL) and MeI (12 mL). The reaction mixture was refluxed for 60 min, and concentrated in vacuo, the residue was purified by column chromatography to give the compound 300c (200 mg, 13%).
A solution of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-1′-methyl-2′-(methylthio)spiro[chroman-4,4′-imidazol]-5′(1′H)-one (200 mg, 0.44 mmol), NH4I (200 mg) in NH3/EtOH (15 mL, 1 N) was heated at 120° C. in a tube in a microwave reactor for 2.5 h. After cooling, the mixture was concentrated in vacuum to afford the compound 300d (100 mg, 50%).
By using the same synthetic strategy for compound 434 as described in Example 174, compound 300 (1.96 mg, 10%) was obtained. 1H-NMR (400 MHz CDCl3): δ7.49 (d, 1H), 7.35 (d, 1H), 7.17 (m, 2H), 7.06 (m, 2H), 4.58 (m, 1H), 3.79 (d, 2H), 3.28 (s, 1.3H), 3.08 (d, 1.5H), 2.47 (m, 1H), 2.16 (m, 2H), 1.92 (t, 1H), 1.63 (m, 1H), 1.42 (m, 2H), 1.26 (m, 6H); ESI MS: m/z 444 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compounds 431 and 254 were obtained.
compound 431: (2.19 mg, 10%), 1H-NMR (400 MHz CD3OD): δ7.52 (d, 1H), 7.48 (t, 1H), 7.52 (d, 1H), 7.48 (t, 1H), 7.40 (s, 1H), 7.32 (t, 1H), 7.28 (t, 1H), 7.00 (t, 1H), 4.55-4.57 (m, 1H), 3.76 (d, 2H), 3.07 (d, 3H), 2.43 (d, 1H), 2.06-2.17 (m, 2H), 1.85-1.91 (m, 1H), 1.57-1.66 (m, 1H), 1.32-1.45 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 456 [M+H]+.
compound 254 (7.53 mg, 35%), 1H-NMR (400 MHz MeOD): 7.56 (d, 1H), 7.48 (t, 1H), 7.40 (s, 1H), 7.32 (t, 1H), 7.28 (t, 1H), 7.00 (t, 1H), 4.53-4.56 (m, 1H), 3.76 (d, 2H), 3.24 (s, 3H), 2.43 (d, 1H), 2.10-2.16 (m, 2H), 1.88-1.91 (m, 1H), 1.58-1.60 (m, 1H), 1.38-1.44 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 456 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, two compounds were obtained.
compound 417 (1.59 mg, 15%), 1H-NMR (400 MHz CD3OD): δ7.59 (d, 1H), 7.43 (d, 2H), 7.32 (d, 1H), 7.12 (d, 1H), 7.03 (d, 1H), 4.56-4.67 (m, 1H), 3.76 (d, 2H), 3.09 (d, 3H), 2.43 (d, 1H), 2.08-2.15 (m, 2H), 1.87-1.91 (m, 1H), 1.59-1.62 (m, 1H), 1.32-1.43 (m, 2H), 1.21-1.26 (m, 6H); ESI MS: m/z 472 [M+H]+.
compound 190 (3.97 mg, 20%), 1H-NMR (400 MHz CD3OD): δ7.59 (d, 1H), 7.43 (d, 2H), 7.32 (d, 1H), 7.12 (d, 1H), 7.03 (d, 1H), 4.54-4.57 (m, 1H), 3.76 (d, 2H), 3.22 (s, 3H), 2.43 (d, 1H), 2.06-2.17 (m, 2H), 1.84-1.93 (m, 1H), 1.61-1.69 (m, 1H), 1.36-1.49 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 472 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 194 (4.61 mg, 21%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.71-7.74 (m, 1H), 7.54-7.64 (m, 2H), 7.38-7.46 (m, 2H), 6.97-7.00 (m, 1H), 4.35-4.51 (m, 0.6H), 3.66 (m, 0.4H), 3.16 (m, 2H), 2.93 (m, 1H), 2.32 (m, 1H), 2.06-2.20 (m, 2H), 1.70-1.90 (m, 2H), 1.31-1.60 (m, 2H), 1.15-1.18 (m, 2H); ESI MS: m/z 463 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 229 (3.11 mg, 15%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.51 (d, 1H), 7.40 (s, 1H), 7.03-7.11 (m, 3H), 4.56-4.59 (m, 1H), 3.75 (d, 2H), 3.24 (s, 3H), 2.43 (d, 1H), 2.08-2.27 (m, 2H), 1.84-1.93 (m, 1H), 1.52-1.62 (m, 1H), 1.32-1.45 (m, 2H), 1.22-1.27 (m, 6H); ESI MS: m/z 474 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 452 and compound 241 (3.57 mg, 18%) were obtained.
compound 452: 1H-NMR (400 MHz CD3OD): δ7.54 (d, 1H), 7.25-7.40 (m, 4H), 7.01-7.04 (m, 3H), 4.55-4.56 (m, 1H), 3.74 (d, 2H), 3.06 (d, 3H), 2.43 (d, 1H), 2.11 (m, 2H), 1.84-1.93 (m, 1H), 1.61-1.64 (m, 1H), 1.34-1.42 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 438 [M+H]+.
compound 241: 1H-NMR (400 MHz CD3OD): δ7.54 (d, 1H), 7.29-7.40 (m, 4H), 7.00-7.04 (m, 2H), 4.52-4.60 (m, 1H), 3.79 (d, 2H), 3.26 (s, 3H), 2.43 (d, 1H), 2.09-2.20 (m, 2H), 1.86-1.93 (m, 1H), 1.60-1.65 (m, 1H), 1.36-1.49 (m, 2H), 1.22-1.31 (m, 6H); ESI MS: m/z 438 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 372 (0.86 mg, 4%) and compound 231 (1.25 mg, 5%) were obtained.
compound 372: 1H NMR (400 MHz CD3OD): δ7.46-7.77 (m, 2H), 6.89-7.21 (m, 4H), 4.56 (m, 1H), 3.78 (m, 2H), 3.06 (d, 3H), 2.44 (m, 1H), 2.14 (m, 2H), 1.91 (m, 1H), 1.60-1.70 (m, 1H), 1.43 (m, 2H), 1.28 (m, 6H); ESI MS: m/z 456 [M+H]+.
compound 231: 1H NMR (400 MHz CD3OD): δ7.53 (m, 1H), 7.38 (m, 1H), 7.18 (m, 2H), 6.96 (m, 1H), 6.75 (m, 1H), 4.47 (m, 0.7H), 3.84 (m, 0.3H), 3.66 (m, 2H), 3.23 (s, 3H), 2.01-2.42 (m, 3H), 1.89 (m, 1H), 1.53 (m, 1H), 1.30-1.36 (m, 2H), 1.17 (m, 6H); ESI MS: m/z 456 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 185 (2.26 mg, 4%) was obtained. 1H-NMR (400 MHz CD3OD): δ8.28 (m, 2H), 8.10 (m, 1H), 7.68 (m, 1H), 7.60 (m, 1H), 7.12 (m, 1H), 4.61 (m, 1H), 3.78 (m, 2H), 3.34 (s, 1H), 3.26 (s, 2H), 2.48 (m, 1H), 2.12-2.19 (m, 2H), 1.91 (m, 1H), 1.63 (m, 1H), 1.46 (m, 2H), 1.25 (m, 6H); ESI MS: m/z 470 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 200 (4.49 mg, 19%) was obtained. 1H-NMR (400 MHz CD3OD): δ7.77-7.82 (m, 2H), 7.51-7.63 (m, 3H), 7.35-7.46 (m, 1H), 7.06-7.09 (m, 1H), 4.56-4.60 (m, 0.8H), 3.96 (m, 0.2H), 3.75-3.78 (m, 2H), 3.32 (s, 1H), 3.24 (s, 2H), 2.42-2.48 (m, 1H), 2.12-2.19 (m, 2H), 1.90-1.93 (m, 1H), 1.61-1.65 (m, 1H), 1.37-1.46 (m, 2H), 1.25-1.30 (m, 6H); ESI MS: m/z 488 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 197 (1.61 mg, 7%) was obtained. 1H NMR (400 MHz CD3OD): δ7.54 (m, 2H), 7.46 (m, 1H), 7.38 (m, 2H), 7.30 (m, 1H), 7.02 (m, 1H), 4.56 (m, 1H), 3.76 (m, 2H), 3.24 (s, 3H), 2.46 (m, 1H), 2.12 (m, 2H), 1.90 (m, 1H), 1.62 (m, 1H), 1.44 (m, 1H), 1.38 (m, 1H), 1.27 (s, 3H), 1.23 (s, 3H); ESI MS: m/z 454 [M+H]+.
Pd(PPh3)4 (3 mg) under Ar2 was treated sequentially with the compound 246a (20 mg, 0.05 mmol), K2CO3 (2 N, 40 uL) in THF (1 mL), and 3-bromophenylboronic acid (11 mg, 0.1 mmol). The mixture was refluxed overnight, concentrated in vacuo, the residue was purified by preparative TLC and preparative HPLC to give compound 246 (2.0 mg, 7%). 1H-NMR (400 MHz CD3OD): δ7.66 (d, 1H), 7.51 (m, 1H), 7.47 (m, 1H), 7.38-7.41 (t, 1H), 7.35-7.39 (d, 1H), 7.24-7.28 (t, 1H), 6.97-7.00 (t, 1H), 4.53-4.56 (m, 1H), 3.70-3.72 (m, 2H), 3.25 (s, 3H), 2.36-2.40 (m, 1H), 2.05-2.12 (m, 2H), 1.84-1.85 (m, 1H), 1.54-1.58 (m, 1H), 1.31-1.38 (m, 2H), 1.19-1.28 (m, 6H); ESI MS: m/z 500 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 218 (1.08 mg, 3%) was obtained. 1H NMR (400 MHz CD3OD): δ7.86-7.88 (d, 1H), 7.72-7.76 (d, 1H), 7.51-7.53 (m, 1H), 7.35-7.40 (m, 2H), 7.06-7.08 (d, 1H), 3.76-3.79 (m, 2H), 3.23 (s, 2H), 2.40-2.48 (m, 1H), 2.12-2.16 (m, 2H), 1.87-1.96 (m, 1H), 1.60-1.65 (m, 1H), 1.30-1.38 (m, 2H), 1.22-1.28 (m, 6H); ESI MS: m/z 463 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 222 (2.45 mg, 7%) and compound 437 (1.08 mg, 6%) were obtained.
compound 222: 1H-NMR (400 MHz CD3OD): δ7.51-7.53 (d, 1H), 7.37-7.43 (m, 2H), 7.20-7.22 (m, 1H), 7.10 (d, 1H), 6.95-7.00 (m, 1H), 4.51-4.54 (m, 1H), 3.70-3.72 (m, 2H), 2.92-3.02 (s, 3H), 2.37-2.47 (m, 1H), 2.21 (m, 3H), 2.04-2.10 (m, 2H), 1.80-1.87 (m, 1H), 1.55-1.58 (m, 1H), 1.38-1.43 (m, 2H), 1.18 (m, 6H); ESI MS: m/z 459 [M+H]+.
compound 437: 1H-NMR (400 MHz CD3OD): δ7.51-7.52 (d, 1H), 7.34-7.40 (m, 2H), 7.18-7.22 (m, 1H), 7.07 (s, 1H), 6.94-7.00 (m, 1H), 4.50 (m, 0.7H), 3.85 (m, 0.3H), 3.64-3.70 (m, 2H), 3.12 (s, 3H), 2.39 (m, 0.8H), 2.23 (m, 0.4H), 2.16-2.20 (m, 3H), 2.03-2.07 (m, 2H), 1.79-1.85 (m, 1H), 1.52-1.57 (m, 1H), 1.25-1.35 (m, 2H), 1.17 (m, 6H); ESI MS: m/z 459 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 284 (3.89 mg, 16%) was obtained. 1H NMR (400 MHz CD3OD): δ7.88-7.95 (m, 2H), 7.68-7.71 (m, 1H), 7.27-7.30 (m, 1H), 7.00-7.08 (m, 2H), 4.55-4.60 (m, 1H), 3.70-3.79 (m, 2H), 3.19 (s, 3H), 2.42-2.47 (m, 1H), 2.10-2.29 (m, 2H), 1.82-1.91 (m, 1H), 1.60-1.65 (m, 1H), 1.37-1.43 (m, 2H), 1.27-1.30 (m, 6H); ESI MS: m/z 513 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 212 (2.02 mg, 9%) was obtained. 1H NMR (400 MHz CD3OD): δ7.70-7.80 (m, 2H), 7.50-7.52 (m, 1H), 7.31-7.44 (m, 2H), 7.09-7.11 (m, 1H), 4.59-4.62 (m, 1H), 3.78-3.80 (m, 2H), 3.26 (s, 3H), 2.46-2.50 (m, 1H), 2.14-2.21 (m, 2H), 1.92-1.95 (m, 1H), 1.62-1.64 (m, 1H), 1.35-1.48 (m, 2H), 1.26-1.32 (m, 6H); ESI MS: m/z 463 [M+H]+.
By using the same synthetic strategy for compound 434 as described in Example 174, compound 213 (2.0 mg, 8%) was obtained. 1H-NMR (400 MHz CD3OD): δ8.23-8.26 (d, 1H), 8.12-8.14 (d, 1H), 8.01-8.06 (t, 1H), 7.63-7.68 (d, 1H), 7.58-7.60 (t, 1H), 7.08-7.13 (t, 1H), 4.52-4.56 (m, 1H), 3.74-3.77 (m, 1H), 3.25 (s, 3H), 2.42-2.48 (m, 1H), 2.11-2.18 (m, 2H), 1.85-1.92 (m, 1H), 1.59-1.62 (m, 1H), 1.38-1.45 (m, 2H), 1.23-1.35 (m, 6H); ESI MS: m/z 513 [M+H]+.
A steel autoclave was charged with a mixture of 6-bromo-2′,4′,5′,6′-tetrahydrosp-iro[chroman-2,3′-pyran]-4-one (8.6 g, 28.86 mmol), KCN (3.75 g, 57.72 mmol) and (NH4)2CO3 (19.4 g, 202.02 mmol) in formamide (80 mL). The mixture was stirred at 70° C. for 2 days and at 110° C. for 1 day. The reaction mixture was then cooled to room temperature and poured into ice (80 g). The solution was acidified with concentrated HCl solution to pH=1, and filtered. The filter cake was washed with water (15 mL×2), and dissolved in ethyl acetate (200 mL). After drying over Na2SO4 and concentrated in vacuo, the pure compound 332a (8 g, 80%) was obtained. 1H-NMR (CDCl3 400 MHz): δ7.30-7.26 (m, 1H), 7.16 (d, 1H), 6.83-6.69 (m, 1H), 3.79 (m, 1H), 3.61 (m, 1H), 3.49 (m, 2H), 2.42 (m, 1H), 2.06 (d, 1H), 1.88-1.73 (m, 2H), 1.67-1.51 (m, 2H).
A suspension of the compound 332a (9 g, 24.57 mmol) and Lawesson's Reagent (9.9 g, 24.57 mmol) in dry 1,4-dioxane (135 mL) was heated at 120° C. in microwave for 30 min. The mixture was concentrated in vacuo, and the residue was purified by column chromatography to give the compound 332b (8 g, 85%).
To a solution of compound 332b (2.4 g, 6.3 mmol) in MeOH (300 mL) was added aq. NaOH solution (0.6 N, 21 mL) and MeI (15 mL). The reaction mixture was heated for 60 min under reflux. The mixture was concentrated in vacuo to give the residue, which was purified by column chromatography to give compound 332c (1.6 g, 50%). 1H-NMR (CDCl3 400 MHz): δ7.22 (d, 1H), 6.79 (dd, 1H), 6.62 (dd, 1H), 3.78-3.69 (m, 2H), 3.61-3.45 (m, 2H), 3.10 (s, 3H), 2.49 (d, 3H), 2.18 (m, 1H), 1.82 (m, 1H), 1.69-1.48 (m, 4H).
A solution of the compound 332c (1.54 g, 37.56 mmol), NH4I (1.4 g) in a solution of NH3/EtOH (140 mL, 8 N) was heated at 120° C. in microwave for 2.5 hrs. After being cooled, the mixture was concentrated in vacuum to give the compound 332d (1.5 g, crude), which was used for the next step directly.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the compound 332d (20 mg, 0.05 mmol) in 1,4-dioxane (2 mL), aq. Cs2CO3 solution (2 N, 0.3 mL) and 2,5-difluorophenylboronic acid (16.67 mg, 0.1 mmol). The mixture was heated at 120° C. under microwave for 20 min. The reaction mixture was concentrated in vacuo, the residue was purified by preparative TLC and preparative HPLC to give the pure compound 332 (4.11 mg, 10%) as a TFA salt. 1H-NMR (CD3OD 400 MHz): δ7.46-7.50 (m, 1H), 7.25-7.30 (m, 1H), 7.12-7.20 (m, 2H), 7.01-7.11 (m, 2H), 3.75-3.96 (m, 2H), 3.55-3.68 (m, 2H), 3.26 (s, 3H), 2.30-2.48 (m, 2H), 1.79-2.10 (m, 3H), 1.51-1.61 (m, 1H); ESI MS: m/z 414.0 [M+H]+.
To a stirred solution of 4-bromo-1,2-difluorobenzene (3.5 g, 17.86 mmol) in dry THF was cooled to −78° C., was added a n-BuLi (10.71 mL) solution dropwise. After completion of the addition, the mixture was stirred for 15 min, and triisopropyl borate (6.71 g, 35.71 mmol) was added in one portion. The reaction flask was kept in a cooling bath for 30 min, and warmed to room temperature for 3 hours. The solvent was removed, the residue was dissolved in ether, washed with 1N HCl and water, dried over Na2SO4, filtered, and concentrated in vacuo, the residue was purified by recrystallyzation with CH2Cl2 and hexane to give the pure 3,4-difluorophenylboronic acid (800 mg, 20%).
By using the same synthetic strategy for compound 332 described in Example 217, compound 351 (5 mg, 12%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.51-7.54 (m, 1H), 7.39-7.45 (m, 1H), 7.19-7.28 (m, 3H), 7.00-7.03 (m, 1H), 3.70-3.87 (m, 2H), 3.50-3.59 (m, 2H), 3.24 (s, 3H), 2.26-2.39 (m, 2H), 1.74-2.04 (m, 3H), 1.50-1.54 (m, 1H); ESI MS: m/z 414.0 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 286 (2.58 mg, 6%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.61-7.63 (m, 1H), 7.38-7.41 (m, 2H), 7.28 (m, 1H), 7.10-7.16 (m, 2H), 3.76-3.97 (m, 2H), 3.57-3.69 (m, 2H), 3.31 (s, 3H), 3.04-3.10 (m, 2H), 2.31-2.52 (m, 2H), 1.79-2.16 (m, 3H), 1.55-1.71 (m, 1H); ESI MS: m/z 430.0 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 215 (6.22 mg, 18%) and compound 270 (1.07 mg, 3%) were obtained.
compound 215: 1H-NMR (CD3OD 400M): δ7.62-7.64 (m, 1H), 7.42-7.44 (m, 2H), 7.29-7.32 (m, 1H), 7.10-7.16 (m, 2H), 3.83-3.94 (m, 2H), 3.61-3.66 (m, 2H), 3.31 (s, 3H), 2.33-2.46 (m, 2H), 1.78-2.10 (m, 3H), 1.53-1.64 (m, 1H). ESI MS: m/z 430.0 [M+H]+.
compound 270: 1H-NMR (CD3OD 400M): δ7.61-7.64 (m, 1H), 7.40-7.43 (m, 2H), 7.28-7.31 (m, 1H), 7.09-7.18 (m, 2H), 3.75-3.80 (m, 2H), 3.61-3.64 (m, 2H), 3.31 (s, 3H), 2.45 (s, 2H), 1.90-2.15 (m, 3H), 1.60-1.68 (m, 1H); ESI MS: m/z 430.0 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 250 (2.48 mg, 11%) and compound 356 (1.75 mg, 8%) were obtained.
compound 250: 1H-NMR (CD3OD 400 MHz): δ7.76 (s, 1H), 7.61-7.66 (m, 2H), 7.42-7.44 (m, 2H), 7.06-7.08 (m, 1H), 3.76-3.88 (m, 2H), 3.51-3.57 (m, 2H), 3.24 (s, 3H), 2.27-2.40 (m, 2H), 1.72-2.05 (m, 3H), 1.48-1.58 (m, 1H); ESI MS: m/z 420.9 [M+H]+.
compound 356: 1H-NMR (CD3OD 400 MHz): 7.83 (m, 1H), 7.69-7.73 (m, 2H), 7.49-7.52 (m, 2H), 7.12-7.15 (m, 1H), 3.77-3.80 (m, 2H), 3.63-3.66 (m, 2H), 3.33 (s, 3H), 2.47 (s, 2H), 1.94-2.14 (m, 3H), 1.69 (m, 1H); ESI MS: m/z 420.9 [M+H]+.
By using the same synthetic strategy for compound compound 332 described in Example 217, compound 346 (8.2 mg, 19%) was obtained. 1H NMR (CDCl3 400 MHz) δ7.53-7.55 (m, 1H), 7.32 (m, 1H), 6.98-7.18 (m, 3H), 3.77-3.95 (m, 2H), 3.55-3.72 (m, 2H), 3.28 (s, 3H), 3.02-3.12 (m, 1H), 2.41-2.54 (m, 1H), 1.80-2.18 (m, 3H), 1.55-1.71 (m, 1H); ESI MS: m/z 432.0 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 280 (1.76 mg, 9%) and compound 359 (0.61 mg, 3%) were obtained.
compound 280: 1H-NMR (CD3OD 400 MHz): δ7.51-7.53 (m, 1H), 7.31 (m, 1H), 7.07-7.14 (m, 2H), 7.00-7.04 (m, 1H), 3.90-3.93 (m, 1H), 3.80-3.86 (m, 1H), 3.56-3.64 (m, 2H), 3.26 (s, 3H), 2.32-2.46 (m, 2H), 1.97-2.09 (m, 1H), 1.88-1.96 (m, 1H), 1.77-1.80 (m, 1H), 1.55-1.62 (m, 1H); ESI MS: m/z 432.0 [M+H]+.
compound 359: 1H-NMR (CD3OD 400 MHz): δ7.45-7.51 (m, 1H), 7.29 (m, 1H), 7.07-7.14 (m, 2H), 7.00-7.04 (m, 1H), 3.75-3.78 (m, 2H), 3.57-3.62 (m, 2H), 3.26 (s, 3H), 2.45 (m, 2H), 2.09-2.13 (m, 1H), 1.90-1.97 (m, 1H), 1.73-1.88 (m, 1H), 1.62-1.71 (m, 1H); ESI MS: m/z 432.1 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 347 (5.16 mg, 25%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.61-7.77 (m, 1H), 7.29-7.47 (m, 4H), 7.02-7.11 (m, 2H), 3.77-3.95 (m, 2H), 3.58-3.64 (m, 2H), 3.26 (s, 3H), 2.28-2.46 (m, 2H), 1.79-2.17 (m, 3H), 1.56-1.71 (m, 1H); ESI MS: m/z 395.1 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 314 (4.2 mg, 10%) was obtained. 1H-NMR (CDCl3 400 MHz): δ7.62-7.67 (m, 1H), 7.39-7.44 (m, 1H), 7.18-7.27 (m, 2H), 7.7.09-7.14 (m, 1H), 6.89-6.94 (m, 1H), 3.79-4.00 (m, 2H), 3.59-3.79 (m, 2H), 3.32 (s, 3H), 2.29-2.52 (m, 2H), 1.80-2.18 (m, 3H), 1.56-1.74 (m, 1H); ESI MS: m/z 414.0 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 255 (1.08 mg, 3%) and compound 309 (1.08 mg, 3%) were obtained.
compound 255: 1H NMR (CD3OD 400 MHz): δ8.17-8.18 (d, 2H), 8.01 (s, 1H), 7.62-7.65 (m, 1H), 7.43-7.45 (m, 1H), 7.04-7.07 (m, 1H), 3.67-3.85 (m, 2H), 3.47-3.55 (m, 2H), 3.21 (s, 3H), 2.25-2.38 (m, 2H), 1.72-1.97 (m, 3H), 1.49-1.52 (m, 1H); ESI MS: m/z 428.1 [M+H]+.
compound 309: 1H NMR (CD3OD 400 MHz): δ8.17-8.18 (d, 2H), 8.01 (s, 1H), 7.62-7.64 (m, 1H), 7.42-7.43 (m, 1H), 7.04-7.06 (m, 1H), 3.67-3.72 (m, 2H), 3.52-3.55 (m, 2H), 3.21 (s, 3H), 2.37 (s, 2H), 1.78-2.06 (m, 3H), 1.55-1.62 (m, 1H); ESI MS: m/z 427.9 [M+H]+.
By using the same synthetic strategy for compound 332 described in Example 217, compound 259 (2.60 mg, 12%) and compound 325 (0.73 mg, 4%) were obtained.
compound 259: 1H-NMR (CD3OD 400 MHz): δ7.78-7.80 (m, 2H), 7.60-7.65 (m, 3H), 7.40 (s, 1H), 7.12-7.14 (m, 1H), 3.83-3.95 (m, 2H), 3.60-3.64 (m, 2H), 3.26 (s, 3H), 2.33-2.47 (m, 2H), 1.81-2.09 (m, 3H), 1.58-1.63 (m, 1H); ESI MS: m/z 446.0 [M+H]+.
compound 325: 1H-NMR (CD3OD 400 MHz): δ7.78-7.80 (m, 2H), 7.60-7.65 (m, 3H), 7.38-7.39 (m, 1H), 7.11-7.13 (m, 1H), 3.74-3.85 (m, 2H), 3.56-3.67 (m, 2H), 3.26 (s, 3H), 2.47 (s, 2H), 1.87-2.15 (m, 3H), 1.59-1.68 (m, 1H); ESI MS: m/z 446.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 290 (2.42 mg, 11%) was obtained, 1H NMR (CD3OD 400 MHz): δ7.61 (m, 2H), 7.45 (m, 1H), 7.33 (m, 3H), 7.10 (m, 0.1H), 3.84 (m, 2H), 3.63 (m, 2H), 2.65-3.10 (m, 3H), 2.48 (m, 2H), 2.10 (m, 2H), 1.93 (m, 1H), 1.64 (m, 1H); ESI MS: 412 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 224 (2.78 mg, 13%) and compound 289 (2.10 mg, 9%) were obtained.
compound 224: 1H NMR (CD3OD 400 MHz): δ7.53-7.59 (m, 2H), 7.44-7.45 (m, 1H), 7.29-7.38 (m, 3H), 7.07-7.09 (d, 1H), 3.81-3.92 (m, 2H), 3.58-3.62 (m, 2H), 3.26 (s, 3H), 2.31-2.44 (m, 2H), 1.77-2.06 (m, 3H), 1.52-1.62 (m, 1H); ESI MS: m/z 412.0 [M+H]+.
compound 289: 1H NMR (CD3OD 400 MHz): δ7.57-7.67 (m, 2H), 7.46-7.51 (m, 1H), 7.35-7.44 (m, 3H), 7.10-7.12 (m, 1H), 3.75-3.85 (m, 2H), 3.61-3.69 (m, 2H), 3.26 (s, 3H), 2.48 (m, 2H), 1.90-2.18 (m, 3H), 1.64-1.72 (m, 1H); ESI MS: m/z 412.0 [M+H]+.
The solution of compound 318a (20 mg), 3-bromophenylboronic acid (11 mg), and
K2CO3 (2 N, 0.06 mL) in THF (5 mL) was added Pd(PPh3)4 (3 mg) under N2. The mixture was refluxed overnight, the solvent was removed in vacuum, and the crude product was purified by preparative TLC and HPLC to give compound 318 (2.72 mg, 11%) and compound 336 (0.78 mg, 3%).
compound 318: 1H-NMR (CD3OD 400 MHz): δ7.70-7.69 (m, 1H), 7.58-7.60 (m, 1H), 7.45-7.52 (m, 2H), 7.32-7.34 (m, 2H), 7.09-7.11 (m, 1H), 3.89-3.97 (m, 1H), 3.79-3.88 (m, 1H), 3.58-3.64 (m, 2H), 3.41 (s, 3H), 2.31-2.46 (m, 2H), 1.78-2.08 (m, 3H), 1.56-1.62 (m, 1H); ESI MS: m/z 457.8 [M+H]+.
compound 336: 1H-NMR (CD3OD 400 MHz): δ7.60 (m, 1H), 7.48-7.52 (m, 1H), 7.36-7.42 (m, 2H), 7.20-7.24 (m, 2H), 6.98-7.00 (m, 1H), 3.72-3.63 (m, 2H), 3.48-3.56 (m, 2H), 3.41 (s, 3H), 2.36 (s, 2H), 1.83-2.06 (m, 3H), 1.52-1.62 (m, 1H); ESI MS: m/z 457.8 [M+H]+.
The solution of 2,2,6,6-tetramethylpiperidine (7.1 g, 49.6 mmol) in dry THF (100 mL) at −10° C. in a 500 mL dry three-neck flask was added n-BuLi (2.5 M in hexane, 19.8, 49.6 mmol) over 2 min under N2, and the mixture was stirred for 10 min. At −78° C., B(OiPr)3 (10.8 g, 57.4 mmol) was added over 2 min, and the mixture was stirred for 5 min, followed by addition of a solution of 4-fluorobenzonitrile (5 g, 41 mmol) in dry THF (140 mL) over 5 mins. The reaction mixture was left in the cooling bath overnight, and warmed to room temperature. At room temperature, the reaction mixture was quenched with glacial acetic acid (3.3 mL), and 2,2-dimethyl-1,3-propandiol (6.4 g, 61.5 mmol) was added. The mixture was stirred for 1 h at room temperature, and was added ethyl acetate. The organic layer was washed with aqueous KH2PO4 (10 w/v %, 3×100 mL). The water phase was extracted with ethyl acetate, and the combined organic layer was dried and evaporated to give 3-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-4-fluorobenzonitrile (1 g, 10%). 1H-NMR (CDCl3 400 MHz): δ8.00 (m, 1H), 7.62 (m, 1H), 7.03 (m, 1H), 3.75 (d, 4H), 1.01 (s, 6H).
By using the same synthetic strategy as compound 332 described in Example 217, compound 288 (2.15 mg, 10%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.86-7.84 (m, 1H), 7.74-7.77 (m, 1H), 7.55-7.57 (m, 1H), 7.35-7.40 (m, 2H), 7.11-7.14 (m, 1H), 3.78-3.98 (m, 2H), 3.56-3.68 (m, 2H), 3.29 (s, 3H), 2.34-2.49 (m, 2H), 1.78-2.18 (m, 3H), 1.58-1.75 (m, 1H); ESI MS: m/z 421.2 [M+H]+.
To a stirred solution of 3-bromo-4-methylbenzonitrile (3.5 g, 17.86 mmol) in dry THF at −78° C. was added n-BuLi (2N, 10.71 mL) dropwise. The mixture was stirred for 15 min, and added triisopropyl borate (6.71 g, 35.71 mmol). The reaction flask was kept in the cooling bath for 30 min., and at room temperature for 3 hours. The solvent was removed, and the residue was dissolved in ether. The organic phase was washed with 1N HCl solution and water, dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo, and the residue was crystallized from a mixture of CH2Cl2 and hexane to give 5-cyano-2-methylphenylboronic acid (800 mg, 20%). 1H-NMR (CDCl3 400 MHz): δ7.50-7.78 (m, 2H), 7.30 (d, 1H), 2.42 (s, 3H).
By using the same synthetic strategy as compound 332 described in Example 217, compound 368 (15 mg, 15%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.56-7.58 (d, 1H), 7.41-7.48 (m, 2H), 7.27-7.31 (m, 1H), 7.06-7.11 (m, 2H), 3.77-3.98 (m, 2H), 3.56-3.68 (m, 2H), 3.24 (s, 3H), 2.99-3.02 (m, 2H), 2.30-2.51 (m, 1H), 2.26 (m, 3H), 1.80-2.15 (m, 3H), 1.52-1.68 (m, 1H); ESI MS: m/z 417.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 277 (2.71 mg, 13%) and compound 413 (1.25 mg, 6%) were obtained.
compound 277: 1H-NMR (CD3OD 400 MHz): δ7.81-7.84 (m, 1H), 7.67-7.72 (m, 2H), 7.55-7.57 (m, 1H), 7.32-7.37 (m, 2H), 4.16-4.19 (m, 1H), 4.06-4.13 (m, 1H), 3.84-3.88 (m, 2H), 3.49 (s, 3H), 2.72-2.57 (m, 2H), 2.51 (s, 3H), 2.06-2.37 (m, 3H), 1.80-1.91 (m, 1H); ESI MS: m/z 417.1 [M+H]+.
compound 413: 1H-NMR (CD3OD 400 MHz): δ7.81-7.83 (m, 1H), 7.66-7.71 (m, 2H), 7.54-7.56 (m, 1H), 7.31-7.35 (m, 2H), 4.02-4.05 (m, 2H), 3.86-3.89 (m, 2H), 3.49 (s, 3H), 2.70 (s, 2H), 2.50 (s, 3H), 2.11-2.39 (m, 3H), 1.86-1.96 (m, 1H); ESI MS: m/z 417.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 380 (1.12 mg, 4%), and compound 449 (1.73 mg, 7%) were obtained.
compound 380: 1H NMR (CD3OD 400 MHz): δ7.90-7.96 (m, 2H), 7.72 (s, 1H), 7.32-7.34 (d, 1H), 7.14 (s, 1H), 7.08-7.10 (d, 1H), 3.84-3.98 (m, 2H), 3.58-3.65 (m, 2H), 3.24 (s, 3H), 2.33-2.50 (m, 2H), 1.81-2.12 (m, 3H), 1.59-1.63 (m, 1H); ESI MS: m/z 471.0 [M+H]+.
compound 449: 1H NMR CD3OD 400 MHz): δ7.89-7.95 (m, 2H), 7.70 (s, 1H), 7.30-7.33 (d, 1H), 7.12 (s, 1H), 7.05-7.07 (d, 1H), 3.76-3.79 (m, 2H), 3.61-3.64 (m, 2H), 3.22 (s, 3H), 2.41-2.50 (m, 2H), 1.90-2.14 (m, 3H), 1.63-1.65 (m, 1H); ESI MS: m/z 471.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 291 (1.63 mg, 7%) was obtained. 1H-NMR (CD3OD 400M): δ7.70-7.77 (m, 2H), 7.53-7.55 (m, 1H), 7.35-7.43 (m, 2H), 7.12-7.15 (m, 1H), 3.83-3.96 (m, 2H), 3.58-3.65 (m, 2H), 3.28 (s, 3H), 2.35-2.49 (m, 2H), 1.85-2.08 (m, 3H), 1.55-1.68 (m, 1H); ESI MS: m/z 421.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 216 (0.8 mg, 4%) and compound 304 (0.8 mg, 4%) were obtained.
compound 216: 1H-NMR (CD3OD 400 MHz): δ8.14 (s, 1H), 8.05 (s, 1H), 7.95 (s, 1H), 7.61-7.64 (dd, 1H), 7.44-7.45 (d, 1H), 7.06-7.08 (dd, 1H), 3.74-3.86 (m, 2H), 3.48-3.56 (m, 2H), 3.21 (s, 3H), 2.25-2.38 (m, 2H), 1.72-1.98 (m, 3H), 1.49-1.52 (m, 1H); ESI MS: m/z 471.1 [M+H]+.
compound 304: 1H-NMR (CD3OD 400 MHz): δ8.18 (s, 1H), 8.08 (s, 1H), 7.98 (s, 1H), 7.65-7.67 (dd, 1H), 7.47-7.48 (d, 1H), 7.09-7.11 (d, 1H), 3.71-3.80 (m, 2H), 3.54-3.60 (m, 2H), 3.24 (s, 3H), 2.41 (s, 2H), 1.80-2.11 (m, 3H), 1.59-1.62 (m, 1H); ESI MS: m/z 471.1 [M+H]+.
The mixture of compound 1 (30 mg, 0.08 mmol), 5-methylthiophen-3-ylboronic acid (17 mg, 0.12 mmol), Pd(PPh3)4 (1 mg, 0.001) and Na2CO3 (2 M, 0.30 mL), in the mixture of EtOH (0.2 mL) and toluene (1 mL) was heated at 120° C. under Ar2 overnight.
The reaction mixture was extracted with EtOAc, concentrated, and purified by preparative
TLC and HPLC to give compound 414 (4.50 mg, 14%), 1H-NMR (CD3OD 400 MHz): 67.41-7.44 (m, 1H), 7.09-7.11 (m, 1H), 6.96-6.97 (m, 1H), 6.89-6.92 (m, 1H), 6.61 (m, 1H), 3.61-3.83 (m, 2H), 3.46-3.58 (m, 2H), 3.25 (s, 3H), 2.26-2.42 (m, 5H), 1.67-2.03 (m, 3H), 1.44-1.62 (m, 1H); ESI MS: m/z 398.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 301 (3.45 mg, 16%) was obtained. 1H-NMR (CD3OD 400 MHz): δ7.60 (m, 1H), 7.26-7.34 (m, 4H), 7.13-7.15 (m, 1H), 7.06-7.09 (m, 1H), 3.75-3.95 (m, 2H), 3.62-3.67 (m, 2H), 3.30 (s, 3H), 2.34-2.49 (m, 5H), 1.81-2.12 (m, 3H), 1.56-1.72 (m, 1H); ESI MS: m/z 392.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 296 (4.32 mg, 20%) and compound 405 (1.40 mg, 6%) were obtained.
compound 296: 1H-NMR (CD3OD 400 MHz): δ7.55-7.61 (m, 1H), 7.36-7.40 (m, 1H), 7.23-7.35 (m, 3H), 7.18-7.22 (m, 1H), 7.05-7.10 (m, 1H), 3.80-3.95 (m, 2H), 3.55-3.65 (m, 2H), 3.38 (s, 3H), 2.50 (s, 3H), 2.31-2.48 (m, 2H), 1.77-2.07 (m, 3H), 1.55-1.65 (m, 1H); EI MS: /z 424.1 [M+H]+.
compound 405: 1H-NMR (CD3OD 400M): δ7.55-7.61 (m, 1H), 7.31-7.40 (m, 2H), 7.23-7.30 (m, 2H), 7.18-7.22 (m, 1H), 7.05-7.10 (m, 1H), 3.75-3.85 (m, 2H), 3.62-3.65 (m, 2H), 3.31 (s, 3H), 2.50 (s, 3H), 2.46 (s, 2H), 1.88-2.16 (m, 3H), 1.61-1.71 (m, 1H): ESI MS: m/z 424.1 [M+H]+.
By using the same synthetic strategy as compound 332 as described in Example 217, compound 262 (8.46 mg, 40%), 1H-NMR (CD3OD 400M): δ7.58 (dd, 1H), 7.42-7.51 (m, 2H), 7.37 (s, 1H), 7.31 (s, 1H), 7.18 (d, 1H), 7.06 (d, 1H), 3.89-3.92 (m, 1H), 3.80-3.84 (m, 1H), 3.50-3.60 (m, 2H), 3.26 (s, 3H), 2.42 (d, 1H), 2.34 (d, 1H), 1.97-2.05 (m, 1H), 1.89-1.98 (m, 1H), 1.79-1.84 (m, 1H), 1.52-1.62 (m, 1H); ESI MS: m/z 462.1 [M+H]+, and compound 357 (2.47 mg, 10%), 1H-NMR (CD3OD 400M): δ7.58 (dd, 1H), 7.42-7.51 (m, 2H), 7.37 (s, 1H), 7.31 (s, 1H), 7.18 (d, 1H), 7.06 (d, 1H), 3.74-3.80 (m, 2H), 3.52-3.63 (m, 2H), 3.26 (s, 3H), 2.63 (s, 1H), 2.42 (s, 2H), 1.85-2.13 (m, 3H), 1.52-1.62 (m, 1H); ESI MS: m/z 462.1 [M+H]+ were obtained.
By using the same synthetic strategy as compound 332 described in Example 217, compound 243 (3.23 mg, 14%) and compound 337 (1.95 mg, 8%) were obtained.
compound 243: 1H-NMR (CD3OD 400 MHz): δ7.70-7.71 (m, 2H), 7.48-7.56 (m, 3H), 7.31 (s, 1H), 7.02-7.04 (d, 1H), 3.72-3.85 (m, 2H), 3.47-3.56 (m, 2H), 3.27 (s, 3H), 2.24-2.37 (m, 2H), 1.72-2.03 (m, 3H), 1.48-1.52 (m, 1H); ESI MS: m/z 446.1 [M+H]+.
compound 337: 1H-NMR (CD3OD 400 MHz): δ7.68-7.72 (m, 2H), 7.48-7.56 (m, 3H), 7.30 (s, 1H), 7.01-7.03 (d, 1H), 3.67-3.76 (m, 2H), 3.49-3.59 (m, 2H), 3.20 (s, 3H), 2.37 (s, 2H), 1.79-2.08 (m, 3H), 1.52-1.64 (m, 1H); ESI MS: m/z 446.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 411 (2.61 mg, 14%) and compound 448 (1.24 mg, 6%) were obtained.
compound 411: 1H-NMR (CD3OD 400 MHz): δ7.61 (m, 1H), 7.43 (d, 1H), 7.28 (d, 1H), 6.97 (d, 1H), 6.63 (m, 1H), 6.40 (m, 1H), 3.74-3.86 (m, 2H), 3.49-3.56 (m, 2H), 3.26 (s, 3H), 2.25-3.39 (m, 2H), 1.71-2.05 (m, 3H), 1.50-1.54 (m, 1H); ESI MS: m/z 368.0 [M+H]+.
compound 448: 1H-NMR (CD3OD 400 MHz): δ7.61 (m, 1H), 7.43 (d, 1H), 7.28 (d, 1H), 6.97 (d, 1H), 6.61 (m, 1H), 6.40 (m, 1H), 3.72 (m, 2H), 3.56 (m, 2H), 3.26 (s, 3H), 2.38 (s, 2H), 1.79-2.06 (m, 3H), 1.61 (m, 1H); ESI MS: m/z 368.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 428 (5.50 mg, 25%) and compound 458 (1.49 mg, 15%) were obtained.
compound 428: 1H-NMR (CD3OD 400 MHz): δ7.52-7.55 (m, 1H), 7.19 (d, 1H), 7.03-7.05 (m, 3H), 6.95-6.97 (d, 1H), 3.91 (d, 1H), 3.78-3.91 (m, 7H), 3.55-3.67 (m, 2H), 3.26 (s, 3H), 2.33-2.46 (m, 1H), 1.97-2.05 (m, 1H), 1.89-1.98 (m, 1H), 1.78-1.84 (m, 1H), 1.52-1.62 (m, 1H); ESI MS: m/z 438.2 [M+H]+.
compound 458: 1H-NMR (CD3OD 400 MHz): δ7.52 (d, 1H), 7.18 (s, 1H), 7.01 (m, 3H), 6.92 (d, 1H), 3.83 (d, 6H), 3.69-3.79 (m, 2H), 3.52-3.64 (m, 2H), 3.26 (s, 3H), 2.41 (s, 2H), 2.03-2.12 (m, 1H), 1.98-2.03 (m, 1H), 1.84-1.93 (m, 1H), 1.52-1.62 (m, 1H); ESI MS: m/z 438.2 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compounds 276 and 340 were obtained.
compound 276 (3.55 mg, 17%), 1H-NMR (CD3OD 400 MHz): δ7.57-7.58 (m, 1H), 7.27-7.28 (d, 1H), 7.13 (s, 2H), 7.07-7.10 (d, 1H), 6.99 (s, 1H), 3.83-3.98 (m, 2H), 3.59-3.68 (m, 2H), 3.33 (s, 3H), 2.32-2.52 (m, 8H), 1.82-2.13 (m, 3H), 1.58-1.67 (m, 1H); ESI MS: m/z 406.0 [M+H]+.
compound 340 (0.93 mg, 4%), 1H-NMR (CD3OD 400 MHz): δ7.55-7.58 (m, 1H), 7.23-7.24 (d, 1H), 7.11 (s, 2H), 7.05-7.07 (d, 1H), 6.97 (s, 1H), 3.75-3.85 (m, 2H), 3.58-3.67 (m, 2H), 3.31 (s, 3H), 2.46 (s, 2H), 2.34 (m, 6H), 1.88-2.16 (m, 3H), 1.66-1.72 (m, 1H); ESI MS: m/z 406.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 364 (5.67 mg, 27%) was obtained. 1H-NMR (CD3OD 400M): δ7.25-7.30 (m, 1H), 7.10-7.14 (m, 1H), 7.01-7.09 (m, 2H), 6.98-7.00 (m, 1H), 6.90-6.96 (m, 1H), 3.75-3.98 (m, 2H), 3.58-3.68 (m, 2H), 3.26 (s, 3H), 2.31-2.48 (m, 2H), 2.29 (s, 3H), 2.12 (s, 3H), 2.01-2.10 (m, 1H), 1.90-2.00 (m, 1H), 1.78-1.88 (m, 1H), 1.55-1.68 (m, 1H); ESI MS: m/z 406.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 307 (7.91 mg, 35%) and compound 321 (2.23 mg, 10%) were obtained.
compound 307: 1H-NMR (CD3OD 400 MHz): δ7.39-7.42 (d, 1H), 7.11 (s, 1H), 6.92 (d, 1H), 6.89 (d, 1H), 6.81 (d, 1H), 6.72 (s, 1H), 3.78-3.90 (m, 2H), 3.72 (s, 3H), 3.66 (s, 3H), 3.52-3.61 (m, 2H), 3.26 (s, 3H), 2.42 (d, 1H), 2.31 (d, 1H), 1.97-2.05 (m, 1H), 1.89-1.98 (m, 1H), 1.78-1.84 (m, 1H), 1.52-1.62 (m, 1H); ESI MS: m/z 438.1 [M+H]+.
compound 321: 1H-NMR (CD3OD 400 MHz): δ7.39-7.42 (d, 1H), 7.10 (s, 1H), 6.92 (d, 1H), 6.89 (d, 1H), 6.79 (d, 1H), 6.72 (s, 1H), 3.74 (s, 2H), 3.72 (s, 3H), 3.66 (s, 3H), 3.52-3.61 (m, 2H), 3.24 (s, 3H), 2.41 (d, 2H), 1.97-2.09 (m, 1H), 1.89-1.98 (m, 1H), 1.78-1.84 (m, 1H), 1.52-1.62 (m, 1H); ESI MS: m/z 438.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 233 (6.55 mg, 23%) and compound 310 (2.18 mg, 8%) were obtained.
compound 233: 1H NMR (CD3OD 400 MHz): δ7.67-7.69 (d, 1H), 7.59-7.61 (d, 1H), 7.49-7.51 (m, 1H), 7.37 (s, 1H), 7.26-7.31 (t, 1H), 7.10-7.12 (d, 1H), 3.92-3.96 (m, 2H), 3.58-3.69 (m, 2H), 3.33 (s, 3H), 3.34-2.48 (m, 2H), 1.82-2.08 (m, 3H), 1.56-1.67 (m, 1H); ESI MS: m/z 430.0 [M+H]+.
compound 310: 1H NMR (CD3OD 400 MHz): δ7.68-7.71 (d, 1H), 7.60-7.62 (d, 1H), 7.49-7.51 (m, 1H), 7.37 (s, 1H), 7.28-7.32 (t, 1H), 7.10-7.13 (d, 1H), 3.79-3.82 (m, 2H), 3.64-3.68 (m, 2H), 3.34 (s, 3H), 2.48 (s, 2H), 1.92-1.98 (m, 3H), 1.65-1.75 (m, 1H). ESI MS m/z 430.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 287 (3.25 mg, 15%) and compound 385 (2.49 mg, 12%) were obtained.
compound 287: 1H-NMR (CD3OD 400 MHz): δ7.12-7.21 (m, 2H), 6.96-6.98 (m, 2H), 6.83-6.88 (m, 1H), 6.75-6.78 (m, 1H), 3.73-3.85 (m, 2H), 3.47-3.54 (m, 2H), 3.16 (s, 3H), 2.23-2.36 (m, 2H), 2.05 (s, 3H), 1.62-2.03 (m, 3H), 1.52 (m, 1H); ESI MS: m/z 410.1 [M+H]+.
compound 385: 1H-NMR (CD3OD 400 MHz): δ7.18-7.21 (m, 2H), 6.94-6.97 (m, 2H), 6.83-6.88 (m, 1H), 6.75-6.78 (m, 1H), 3.69-3.74 (m, 2H), 3.51-3.56 (m, 2H), 3.16 (s, 3H), 2.36 (s, 2H), 2.05 (s, 3H), 1.62-2.03 (m, 3H), 1.52 (m, 1H); ESI MS: m/z 410.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 202 (2.95 mg, 13%) and compound 281 (2.06 mg, 9%) were obtained.
compound 202: 1H-NMR (CD3OD 400 MHz): δ7.62 (d, 2H), 7.53 (s, 2H), 7.53 (s, 1H), 7.42 (s, 1H), 7.12 (d, 1H), 3.82-3.94 (m, 2H), 3.56-3.63 (m, 2H), 3.27 (s, 3H), 2.32-2.45 (m, 2H), 1.79-2.08 (m, 3H), 1.53-1.65 (m, 1H); ESI MS: m/z 446.0 [M+H]+.
compound 281: 1H-NMR (CD3OD 400 MHz): δ7.62 (d, 2H), 7.53 (s, 2H), 7.52 (d, 2H), 7.12 (d, 1H), 3.78-3.87 (m, 2H), 3.56-3.63 (m, 2H), 3.38 (s, 3H), 2.49 (s, 2H), 1.88-2.18 (m, 3H), 1.52 (m, 1H); ESI MS: m/z 446.0 [M+H]+.
The solution of compound 397a (30 mg, 0.08 mmol), thiophen-3-ylboronic acid (15.2 mg, 0.12 mmol), Pd(PPh3)4 (1 mg, 0.001) and Na2CO3 (2 M, 0.30 mL) in a mixture of EtOH (0.2 mL) and toluene (1 mL) was heated at 120° C. under Ar2 overnight. The reaction mixture was extracted with EtOAc, concentrated, and purified by preparative
TLC and preparative HPLC to give compound 397 (7.37 mg, 24%). 1H-NMR (CD3OD 400 MHz): δ7.58-7.63 (m, 1H), 7.52 (m, 1H), 7.41 (m, 1H), 7.35 (m, 1H), 7.29 (m, 1H), 6.98-7.01 (m, 1H), 3.72-3.94 (m, 2H), 3.56-3.62 (m, 2H), 3.25 (s, 3H), 2.26-2.42 (m, 2H), 1.78-2.08 (m, 3H), 1.53-1.63 (m, 1H); ESI MS: m/z 384.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 358 (6.53 mg, 30%) and compound 427 (3.67 mg, 16%) were obtained.
compound 358: 1H-NMR (CD3OD 400 MHz): δ8.06 (s, 1H), 7.92-7.95 (m, 1H), 7.76-7.78 (m, 1H), 7.62-7.64 (m, 1H), 7.51-7.55 (m, 1H), 7.35 (m, 1H), 7.09-7.11 (m, 1H), 3.94 (m, 1H), 3.83 (m, 1H), 3.55-3.62 (m, 2H), 3.28 (s, 3H), 2.62 (s, 3H), 2.32-2.47 (m, 2H), 1.80-2.08 (m, 3H), 1.59 (m, 1H); ESI MS: m/z 420.0 [M+H]+.
compound 427: 1H-NMR (CD3OD 400 MHz): δ8.07 (m, 1H), 7.93-7.95 (m, 1H), 7.76-7.78 (m, 1H), 7.62-7.65 (m, 1H), 7.52-7.56 (t, 1H), 7.34 (s, 1H), 7.08-7.11 (d, 1H), 3.75-3.79 (m, 2H), 3.60-3.64 (m, 2H), 3.28 (s, 3H), 2.62 (s, 3H), 2.45 (m, 2H), 1.89-2.13 (m, 3H), 1.65 (m, 1H); ESI MS: m/z 420.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 386 (3.77 mg, 16%) and compound 429 (1.98 mg, 8%) were obtained.
compound 386: 1H-NMR (CD3OD 400 MHz): δ8.14 (s, 1H), 7.98 (m, 1H), 7.80 (m, 1H), 7.62 (m, 1H), 7.53 (t, 1H), 7.38 (d, 1H), 7.13 (m, 1H), 4.42 (m, 2H), 3.92 (m, 2H), 3.63 (m, 2H), 3.33 (s, 3H), 2.35-2.49 (m, 2H), 1.82-2.13 (m, 3H), 1.62 (m, 1H), 1.42 (m, 3H); ESI MS: m/z 449.9 [M+H]+.
compound 429: 1H-NMR (CD3OD 400 MHz): δ8.14 (s, 1H), 7.98 (m, 1H), 7.78 (m, 1H), 7.64 (m, 1H), 7.55 (m, 1H), 7.36 (s, 1H), 7.13 (m, 1H), 4.38-4.43 (m, 2H), 3.78-3.82 (m, 2H), 3.62-3.67 (m, 2H), 3.31 (s, 3H), 2.48 (s, 2H), 1.91-2.18 (m, 3H), 1.68 (m, 1H), 1.40-1.43 (m, 3H); ESI MS: m/z 449.9 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 342 (5.08 mg, 21%) and compound 378 (1.84 mg, 8%) were obtained.
compound 342: 1H-NMR (CD3OD 400 MHz): δ7.44-7.47 (m, 1H), 7.21-7.25 (m, 3H), 6.98-7.05 (m, 2H), 3.96-4.01 (m, 2H), 3.83-3.94 (m, 2H), 3.60-3.63 (m, 2H), 3.26 (s, 3H), 2.32-2.46 (m, 2H), 179-2.10 (m, 3H), 1.55-1.64 (m, 1H), 1.27-1.31 (t, 3H); ESI MS: m/z 456.0 [M+H]+.
compound 378: 1H-NMR (CD3OD 400 MHz): δ7.35-7.38 (m, 1H), 7.11-7.16 (m, 3H), 6.89-6.96 (m, 2H), 3.87-3.93 (m, 2H), 3.68-3.71 (m, 2H), 3.52-3.56 (m, 2H), 3.20 (m, 3H), 2.38 (s, 2H), 1.80-2.06 (m, 3H), 1.53-1.62 (m, 1H), 1.17-1.23 (t, 3H); ESI MS: m/z 456.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 389 (3.55 mg, 17%) and compound 440 (0.93 mg, 4%) were obtained.
compound 389: 1H-NMR (CD3OD 400 MHz): δ7.25 (m, 1H), 7.03-7.12 (m, 3H), 6.92-6.95 (m, 2H), 3.95 (m, 1H), 3.86 (m, 1H), 3.60-3.64 (m, 2H), 3.25 (s, 3H), 2.32-2.47 (m, 2H), 2.29 (s, 3H), 2.05-2.10 (m, 4H), 1.82-2.03 (m, 2H), 1.57-1.64 (m, 1H); ESI MS: m/z 406.0 [M+H]+.
compound 440: 1H-NMR (CD3OD 400 MHz): δ7.26 (m, 1H), 7.03-7.14 (m, 3H), 6.93-6.96 (m, 2H), 3.79-3.82 (m, 2H), 3.64-3.67 (m, 2H), 3.26 (s, 3H), 2.47 (s, 2H), 2.30 (s, 3H), 1.90-2.18 (m, 6H), 1.67 (m, 1H); ESI MS: m/z 406.1 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 214 (5.35 mg, 18%) and compound 256 (1.17 mg, 4%) were obtained.
compound 214: 1H NMR (CD3OD 400 MHz): δ7.53 (d, 1H), 7.25 (s, 1H), 7.02-7.07 (m, 2H), 6.92 (s, 1H), 6.86 (s, 1H), 3.88 (d, 1H), 3.82 (m, 4H), 3.51-3.59 (m, 2H), 3.24 (s, 3H), 2.27-2.40 (m, 2H), 1.75-2.01 (m, 3H), 1.57 (m, 1H); ESI MS: m/z 442.0 [M+H]+.
compound 256: 1H NMR (CD3OD 400 MHz): δ7.55 (d, 1H), 7.29 (s, 1H), 7.05-7.10 (m, 2H), 6.96 (s, 1H), 6.89 (s, 1H), 3.81 (s, 3H), 3.74-3.78 (m, 2H), 3.59-3.62 (m, 2H), 3.28 (s, 3H), 2.43 (s, 2H), 1.88-2.13 (m, 3H), 1.65 (m, 1H); ESI MS: m/z 442.0 [M+H]+.
By using the same synthetic strategy as compound 332 described in Example 217, compound 376 (2.60 mg, 12%), compound 395 (1.03 mg, 5%) and compound 435 (1.58 mg, 7%) were obtained.
compound 376: 1H-NMR (CD3OD 400 MHz): δ7.50 (m, 1H), 7.36 (m, 1H), 7.28 (m, 1H), 7.22 (s, 1H), 7.06-7.13 (m, 2H), 4.58 (s, 2H), 3.80-3.96 (m, 2H), 3.55-3.65 (m, 2H), 3.26 (s, 3H), 2.31-2.46 (m, 2H), 1.78-2.06 (m, 3H), 1.58 (m, 1H); ESI MS: m/z 426.0 [M+H]+.
compound 395: 1H-NMR (CD3OD 400 MHz): δ7.49 (m, 1H), 7.35 (m, 1H), 7.29 (m, 1H), 7.22 (m, 1H), 7.05-7.12 (m, 2H), 4.59 (s, 2H), 3.75-3.96 (m, 2H), 3.53-3.62 (m, 2H), 3.26 (s, 3H), 2.31-2.46 (m, 2H), 1.77-2.14 (m, 3H), 1.55-1.72 (m, 1H); ESI MS: m/z 426.0 [M+H]+.
compound 435: 1H-NMR (CD3OD 400 MHz): δ7.50 (m, 1H), 7.35 (m, 1H), 7.28 (m, 1H), 7.21 (s, 1H), 7.05-7.13 (m, 2H), 4.58 (s, 2H), 3.69-3.78 (m, 2H), 3.60-3.63 (m, 2H), 3.22 (s, 3H), 2.45 (s, 2H), 1.83-2.09 (m, 3H), 1.62-1.72 (m, 1H); ESI MS: m/z 426.0 [M+H]+.
The solution of compound 253a (30 mg), and 5-bromo-2-fluoro-3-methylphenylboronic acid (18 mg), and K2CO3 (2 N, 0.1 mL) in THF (1 mL) was added Pd(PPh3)4 (4.5 mg) under N2, and the mixture was refluxed overnight. The solvent was removed in vacuum, and the crude material was purified by preparative TLC and HPLC to give compound 253 (0.85 mg, 2%). 1H-NMR (CD3OD 400 MHz): δ7.48 (m, 1H), 7.34-7.39 (m, 2H), 7.26 (m, 1H), 7.09 (m, 1H), 3.76-3.97 (m, 2H), 3.57-3.68 (m, 2H), 3.29 (m, 3H), 2.33-2.48 (m, 2H), 2.29 (s, 3H), 1.80-2.18 (m, 3H), 1.56-1.72 (m, 1H); ESI MS: m/z 488.0 [M+H]+.
Pd(PPh3)2Cl2 (2 mg) was added to the mixture of 6-bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-2′-methyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]-3′-amine (20 mg, 0.05 mmol), Cs2CO3 (32 mg, 0.10 mmol) and 3-cyanophenylboronic acid (18 mg, 0.10 mmol) in dioxane (3 mL) under Ar2. The mixture was heated at 120° C. in microwave for 15 minutes, and concentrated in vacuo. The residue was purified by preparative TLC and HPLC to give compound 207 (6.49 mg, 31%). 1H-NMR (CD3OD): δ7.90-8.05 (m, 3H), 7.60-7.80 (m, 3H), 7.02-7.10 (m, 1H), 4.05-4.15 (m, 1H), 3.78-3.85 (m, 2H), 3.37-3.45 (m, 3H), 2.68-2.75 (d, 1H), 2.10-2.30 (m, 1H), 1.85-2.05 (m, 2H), 1.60-1.68 (m, 1H), 1.32-1.50 (m, 2H), 1.27-1.30 (d, 6H); ESI MS: m/z=433 [M+H]+.
A solution of 1,3-dibromo-5-chlorobenzene (10 g, 37.34 mmol), pyridine (6.03 mL), and copper (I) cyanide (3.34 g, 37.34 mmol) in DMF (57.74 mL) was refluxed under nitrogen for 2 days. The reaction was difficult to be monitored by TLC, when the impurities were observed, the reaction was cooled to room temperature. The reaction mixture was quenched with 40 mL of ether, the precipitate was filtered and washed with ether (20 mL×2). The organic layer was washed with a mixture of water and concentrated ammonium hydroxide (2:1, 40 mL), saturated ammonium chloride solution (40 mL×2), and saturated sodium bicarbonate solution (40 mL). The organic layer was dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography to give the compound 203a (2 g, 25%).
A mixture of [1,10-bis(diphenylphosphino)-ferrocenyl]dichloropalladium(II) (0.256 g, 0.279 mmol), potassium acetate (1.365 g, 13.95 mmol), bis(pinacolato)diboron (1.3 g, 5.12 mmol) and 3-bromo-5-fluorobenzonitrile (1 g, 4.65 mmol) in anhydrous DMSO (15 mL) was refluxed under N2 atmosphere overnight. The mixture was extracted with ethyl acetate, dried and concentrated, the residue was purified by preparative TLC to afford the compound 203b (0.08 g, 7%). 1H-NMR (CDCl3): δ7.90 (t, 2H), 7.65 (t, 1H), 1.18 (d, 12H, J=5.2 Hz).
A mixture of compound 203c (20 mg, 0.0526 mmol), 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (20.8 mg, 0.079 mmol), Cs2CO3 solution (2 M, 0.3 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under Ar2 was stirred in microwave at 120° C. for 18 minutes. The reaction mixture was concentrated in vacuo, and the residue was purified by preparative TLC to give compound 203 (1.26 mg, 5%), and compound 263 (1.45 mg, 7%).
compound 203: 1H-NMR (400 Hz CD3OD): δ7.85-7.95 (m, 2H), 7.50-7.70 (m, 2H), 7.40-7.50 (m, 1H), 7.05-7.12 (m, 1H), 3.80-3.95 (m, 2H), 3.55-3.65 (m, 2H), 3.25-3.35 (m, 3H), 2.3-2.5 (m, 2H), 1.82-2.00 (m, 3H), 1.50-1.55 (m, 1H); ESI MS: m/z=437 [M+H]+.
compound 263: 1H-NMR (400 Hz CD3OD): δ7.91 (m, 2H), 7.72 (m, 2H), 7.47 (m, 1H), 7.12 (m, 1H), 3.71 (m, 2H), 3.61 (m, 2H), 3.30 (m, 3H), 2.43 (m, 2H), 1.82-2.20 (m, 3H), 1.65 (m, 1H); ESI MS: m/z=437 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the solution of compound 1 (20 mg, 0.05 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.3 mL), and 6-cyanopyridin-2-ylboronic acid (14.8 mg, 0.1 mmol). The mixture was heated in microwave at 12° C. for 20 min. The reaction mixture was concentrated in vacuo, the residue was purified by preparative TLC and HPLC to give compound 410 and compound 446 (0.84+0.98 mg, 8%).
compound 410: 1H NMR (CD3OD): δ7.94 (t, 2H), 7.64 (m, 1H), 7.31 (m, 1H), 7.04 (d, 1H), 6.86 (t, 1H), 3.82 (t, 1H), 3.57 (t, 2H), 3.47 (s, 1H), 3.38 (s, 3H), 2.19 (t, 2H), 1.82 (t, 2H), 1.51-1.71 (m, 2H); ESI MS: m/z=404 [M+H]+.
compound 446: 1H NMR (CD3OD): δ8.12 (d, 1H), 8.04 (m, 2H), 7.79 (t, 2H), 7.17 (t, 1H), 3.82 (d, 1H), 3.66 (t, 2H), 3.47 (s, 1H), 2.17 (s, 1H), 2.04 (t, 1H), 1.94 (t, 1H), 1.68 (s, 1H); ESI MS: m/z=404 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) under Ar2 was added to the mixture of compound 424a (20 mg, 0.05 mmol), Cs2CO3 (32 mg, 0.10 mmol) and 2-(cyclopenta-2,4-dienyl)-6-(4,4,5,5-tetramethyl-1,3-dioxolan-2-yl)pyridine (21 mg, 0.08 mmol) in [1,4]dioxane (1 mL). The mixture was heated at 120° C. in microwave for 20 minutes, and concentrated in vacuo, the residue was purified by preparative TLC and HPLC to give compound 424 (1.66 mg, 7%) and compound 459 (1.22 mg, 6%).
compound 424: 1H NMR (400 MHz CD3OD): δ8.05-8.15 (m, 1H), 7.80-7.95 (m, 2H), 7.60-7.70 (m, 3H), 7.40-7.50 (m, 1H), 7.10-7.20 (m, 1H), 6.30-6.40 (t, 2H), 3.85-3.95 (m, 2H), 3.55-3.70 (m, 2H), 3.30-3.40 (s, 3H), 2.35-2.53 (m, 2H), 1.80-2.12 (m, 3H), 1.55-1.65 (m, 1H); ESI MS: m/z=443 [M+H]+.
compound 425: 1H NMR (400 MHz CD3OD): δ8.10-8.15 (m, 1H), 7.80-7.95 (m, 2H), 7.60-7.70 (m, 3H), 7.40-7.50 (m, 1H), 7.10-7.15 (m, 1H), 6.30-6.40 (t, 2H), 3.75-3.85 (m, 2H), 3.60-3.70 (m, 2H), 3.30-3.40 (s, 3H), 2.40-2.60 (m, 2H), 1.90-2.28 (m, 3H), 1.65-1.75 (m, 1H); ESI MS: m/z=444 [M+H]+.
By using the same synthetic strategy as compound 424 described in Example 261, compound 439 (1.46 mg, 7%) was obtained. 1H NMR (400 MHz CD3OD): δ9.45-9.55 (s, 1H), 8.20-8.30 (m, 2H), 8.05-8.15 (t, 1H), 7.95-8.05 (d, 1H), 7.75-7.85 (d, 1H), 7.70-7.75 (d, 1H), 7.55-7.65 (s, 1H), 7.14-7.20 (t, 1H), 3.90-4.00 (s, 1H), 3.76-3.82 (m, 1H), 3.52-3.67 (m, 2H), 3.30-3.40 (s, 3H), 2.30-2.50 (m, 2H), 1.81-2.03 (m, 2H), 1.51-1.70 (m, 2H); ESI MS: m/z=445 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 433 (2.26 mg, 10%) and compound 457 (1.69 mg, 8%) were obtained.
compound 433: 1H NMR (400 MHz CD3OD): δ8.05-8.10 (s, 1H), 7.80-7.90 (d, 1H), 7.65-7.75 (m, 2H), 7.30-7.45 (m, 2H), 7.09-7.12 (d, 1H), 3.75-3.95 (m, 2H), 3.50-3.70 (m, 2H), 3.20-3.40 (s, 3H), 2.40-2.4540 (m, 1H), 2.30-2.40 (m, 1H), 1.62-2.03 (m, 3H), 1.50-1.55 (m, 1H); ESI MS: m/z=418 [M+H]+.
compound 457: 1H NMR (400 MHz CD3OD): δ7.90-8.00 (s, 1H), 7.65-7.75 (d, 1H), 7.55-7.65 (m, 2H), 7.20-7.30 (m, 2H), 7.00-7.05 (d, 1H), 3.65-3.75 (m, 2H), 3.50-3.60 (m, 2H), 3.20-3.0 (m, 3H), 2.30-2.40 (s, 2H), 1.75-2.10 (m, 3H), 1.50-1.60 (m, 1H); ESI MS: m/z=418 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 426 (2.86 mg, 13%) and compound 427 (1.44 mg, 7%) were obtained.
compound 426: 1H NMR (400 MHz CD3OD): δ8.95-8.05 (m, 1H), 7.75-7.90 (m, 3H), 7.30-7.40 (m, 1H), 7.10-7.20 (d, 1H), 3.80-4.00 (m, 2H), 3.55-3.65 (m, 2H), 3.30-3.40 (s, 3H), 2.30-2.50 (m, 2H), 1.80-2.10 (m, 3H), 1.55-1.65 (m, 1H); ESI MS: m/z=413 [M+H]+.
compound 427: 1H NMR (400 MHz CD3OD): δ7.85-7.95 (m, 1H), 7.65-7.75 (m, 3H), 7.20-7.30 (m, 1H), 7.00-7.10 (d, 1H), 3.65-3.75 (m, 2H), 3.50-3.60 (m, 2H), 3.20-3.30 (s, 3H), 2.30-2.50 (m, 2H), 1.80-2.10 (m, 3H), 1.50-1.60 (m, 1H); ESI MS: m/z=413 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 406 (2.37 mg, 11%) was obtained. 1H NMR (400 MHz CD3OD): δ8.35-8.45 (m, 2H), 7.95-8.20 (m, 2H), 7.70-7.80 (m, 1H), 7.45-7.55 (m, 1H), 7.30-7.45 (m, 1H), 7.00-7.10 (m, 1H), 4.05-4.15 (m, 1H), 3.70-3.80 (m, 2H), 3.30-3.50 (m, 3H), 2.55-2.65 (m, 1H), 2.10-2.30 (m, 1H), 1.80-2.05 (m, 2H), 1.60-1.70 (m, 1H), 1.30-1.50 (m, 2H), 1.15-1.30 (m, 6H); ESI MS: m/z=434 [M+H]+.
By using the same synthetic strategy as compound 424 described in Example 261, compound 445 (2.15 mg, 9%) was obtained. 1H NMR (400 MHz CD3OD): δ8.35-8.45 (m, 1H), 8.15-8.20 (m, 1H), 7.85-7.95 (m, 1H), 7.50-7.65 (m, 3H), 7.40-7.50 (m, 1H), 7.00-7.10 (m, 1H), 6.25-6.35 (m, 2H), 4.05-4.15 (m, 1H), 3.75-3.85 (m, 2H), 3.35-3.50 (m, 3H), 2.65-2.75 (m, 1H), 2.15-2.30 (m, 1H), 2.00-2.10 (m, 1H), 1.85-1.95 (m, 1H), 1.65-1.75 (m, 1H), 1.35-1.55 (m, 2H), 1.25-1.35 (m, 6H); ESI MS: m/z=474 [M+H]+.
By using the same synthetic strategy as compound 424 described in Example 261, compound 400 (2.23 mg, 10%) was obtained. 1H NMR (400 MHz CD3OD): δ9.50-9.60 (s, 1H), 8.35-8.45 (m, 1H), 8.25-8.35 (m, 2H), 8.10-8.20 (m, 1H), 8.00-8.10 (m, 1H), 7.85-7.95 (m, 1H), 7.70-7.80 (m, 1H), 7.55-7.65 (m, 1H), 7.00-7.10 (m, 1H), 4.05-4.15 (m, 1H), 3.60-3.70 (m, 2H), 3.35-3.50 (m, 3H), 2.65-2.75 (m, 1H), 2.15-2.30 (m, 1H), 2.00-2.10 (m, 1H), 1.85-1.95 (m, 1H), 1.60-1.70 (m, 1H), 1.35-1.50 (m, 2H), 1.25-1.35 (m, 6H); ESI MS: m/z=475 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 361 (2.13 mg, 10%) and compound 369 (0.60 mg, 3%) were obtained.
compound 361: 1H NMR (400 MHz CD3OD): δ8.00-8.10 (s, 1H), 7.90-8.00 (m, 1H), 7.80-7.90 (m, 1H), 7.70-7.80 (m, 2H), 7.65-7.70 (s, 1H), 7.35-7.45 (m, 1H), 7.00-7.10 (m, 1H), 4.05-4.15 (m, 1H), 3.75-3.85 (m, 2H), 3.35-3.50 (m, 3H), 2.65-2.75 (m, 1H), 2.15-2.30 (m, 1H), 2.00-2.10 (m, 1H), 1.85-1.95 (m, 1H), 1.60-1.70 (m, 1H), 1.30-1.55 (m, 2H), 1.20-1.30 (m, 6H); ESI MS: m/z=448 [M+H]+.
compound 369: 1H NMR (400 MHz CD3OD): δ7.90-8.00 (s, 1H), 7.80-7.90 (m, 1H), 7.70-7.80 (m, 1H), 7.60-7.70 (m, 1H), 7.55-7.60 (s, 1H), 7.35-7.45 (m, 1H), 6.90-7.00 (m, 2H), 3.90-4.00 (m, 1H), 3.65-3.75 (m, 2H), 3.35-3.50 (m, 3H), 2.65-2.75 (m, 1H), 2.00-2.20 (m, 1H), 1.85-1.95 (m, 1H), 1.75-1.85 (m, 1H), 1.60-1.70 (m, 1H), 1.30-1.55 (m, 2H), 1.20-1.30 (m, 6H); ESI MS: m/z=448 [M+H]+.
By using the same synthetic strategy as compound 424 described in Example 261, compound 393 (1.31 mg, 6%) was obtained. 1H NMR (400 MHz CD3OD): δ8.20-8.30 (s, 1H), 7.90-8.00 (m, 1H), 7.70-7.80 (m, 2H), 7.20-7.30 (m, 1H), 6.95-7.00 (m, 1H), 3.95-4.05 (m, 1H), 3.60-3.70 (m, 2H), 3.25-3.40 (m, 3H), 2.65-2.75 (m, 1H), 2.00-2.20 (m, 1H), 1.85-1.95 (m, 1H), 1.70-1.85 (m, 1H), 1.50-1.60 (m, 1H), 1.35-1.45 (m, 2H), 1.10-1.20 (m, 6H); ESI MS: m/z=443 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 196 (7.58 mg, 32%) was obtained. 1H-NMR (400 Hz CD3OD): 7.50-7.60 (m, 3H), 7.40-7.50 (s, 1H), 7.30-7.40 (s, 1H), 7.00-7.10 (m, 1H), 4.50-4.60 (m, 1H), 3.70-3.80 (m, 2H), 3.20-3.30 (s, 3H), 2.35-2.50 (m 1H), 2.05-2.15 (m, 2H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.15-1.30 (m, 6H); ESI MS: m/z=488 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 182 (2.11 mg, 12%) was obtained. 1H-NMR (400 Hz CD3OD): δ7.80-8.00 (m, 2H), 7.50-7.60 (m, 1H), 7.30-7.50 (m, 2H), 7.00-7.10 (m, 1H), 4.50-4.60 (m, 0.7H), 3.90-4.00 (m, 0.3H), 3.70-3.80 (m, 2H), 3.30-3.35 (s, 1H), 3.20-3.30 (s, 2H), 2.35-2.50 (m 1H), 2.05-2.30 (m, 2H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.15-1.30 (m, 6H); ESI MS: m/z=463 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 268 and compound 187 (3.52 mg, 16%) were obtained.
compound 268: 1H-NMR (400 Hz CD3OD): δ7.55-7.65 (m, 1H), 7.45-7.55 (m, 2H), 7.30-7.40 (m, 1H), 7.20-7.30 (m, 1H), 6.90-7.10 (m, 1H), 4.50-4.60 (m, 1H), 3.00-3.20 (m, 3H), 2.35-2.50 (m 1H), 2.05-2.30 (m, 2H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.15-1.30 (m, 6H); ESI MS: m/z=460 [M+H]+.
compound 187: 1H-NMR (400 Hz CD3OD): δ7.60-7.70 (m, 1H), 7.45-7.55 (m, 2H), 7.30-7.40 (s, 1H), 7.20-7.30 (m, 1H), 6.90-7.10 (m, 1H), 4.50-4.60 (m, 1H), 3.70-3.80 (m, 2H), 3.20-3.30 (s, 3H), 2.40-2.50 (m 1H), 2.05-2.20 (m, 2H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.15-1.30 (m, 6H); ESI MS: m/z=460 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 271 (1.69 mg, 8%) and compound 328 (1.54 mg, 7%) were obtained.
compound 271: 1H NMR (400 Hz CD3OD): δ7.55-7.65 (m, 1H), 7.30-7.40 (s, 1H), 7.05-7.15 (m, 1H), 6.80-6.90 (m, 2H), 6.60-6.70 (m, 1H), 3.75-4.00 (m, 5H), 3.55-3.65 (m, 2H), 3.30-3.40 (s, 3H), 2.30-2.50 (m, 2H), 1.80-2.10 (m, 3H), 1.50-1.70 (m, 1H); ESI MS: m/z=426 [M+H]+.
compound 328: 1H NMR (400 Hz CD3OD): δ7.50-7.60 (m, 1H), 7.30-7.40 (s, 1H), 6.95-7.05 (m, 1H), 6.75-6.85 (m, 2H), 6.55-6.65 (m, 1H), 3.25-3.30 (s, 3H), 3.15-3.25 (m, 2H), 3.50-3.60 (m, 2H), 3.30-3.40 (s, 3H), 2.35-2.45 (s, 2H), 1.80-2.10 (m, 3H), 1.55-1.65 (m, 1H); ESI MS: m/z=426 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 223 (4.50 mg, 20%) was obtained. 1H NMR (400 Hz CD3OD): δ7.60-7.70 (m, 1H), 7.45-7.50 (s, 1H), 7.30-7.40 (m, 2H), 7.20-7.25 (m, 1H), 7.05-7.15 (m, 1H), 3.70-4.00 (m, 5H), 3.55-3.65 (m, 2H), 3.30-3.40 (s, 3H), 2.30-2.50 (m, 2H), 1.80-2.10 (m, 3H), 1.50-1.70 (m, 1H); ESI MS: m/z=433 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 283 (1.97 mg, 7%) and compound 333 (1.78 mg, 6%) were obtained.
compound 283: 1H NMR (400 Hz CD3OD): δ7.50-7.60 (m, 1H), 7.10-7.20 (m, 1H), 6.95-7.05 (m, 1H), 6.50-6.60 (s, 2H), 6.35-6.45 (s, 1H), 3.70-4.00 (m, 8H), 3.50-3.65 (m, 2H), 3.30-3.40 (s, 3H), 2.35-2.50 (m, 2H), 1.70-2.10 (m, 3H), 1.50-1.70 (m, 1H); ESI MS: m/z=438 [M+H]+.
compound 333: 1H NMR (400 Hz CD3OD): δ7.50-7.60 (m, 1H), 7.20-7.30 (s, 1H), 7.00-7.10 (m, 1H), 6.60-6.70 (s, 2H), 6.40-6.50 (s, 1H), 3.75-3.85 (m, 6H), 3.60-3.70 (m, 2H), 3.30-3.40 (s, 3H), 2.40-2.50 (s, 2H), 1.90-2.20 (m, 3H), 1.60-1.80 (m, 1H); ESI MS: m/z=438 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 193 (2.76 mg, 12%) was obtained. 1H NMR (400 Hz CD3OD): δ7.50-7.60 (m, 1H), 7.20-7.40 (m, 1H), 7.05-7.15 (m, 1H), 6.95-7.05 (m, 2H), 6.85-6.90 (s, 1H), 4.50-4.60 (m, 1H), 3.80-3.85 (s, 3H), 3.70-3.80 (m, 2H), 3.20-3.30 (s, 3H), 2.00-2.50 (m, 3H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.20-1.30 (m, 6H); ESI MS: m/z=484 [M+H]+.
By using the same synthetic strategy as compound 424 described in Example 261, compound 183 (2.38 mg, 10%) was obtained. 1H NMR (400 Hz CD3OD): δ7.85-7.95 (m, 2H), 7.60-7.75 (m, 2H), 7.40-7.55 (m, 1H), 7.05-7.15 (m, 1H), 4.50-4.60 (m, 1H), 3.80-3.85 (s, 3H), 3.70-3.80 (m, 2H), 3.35-3.45 (m, 3H), 2.05-2.50 (m, 3H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.40-1.50 (m, 2H), 1.30-1.40 (m, 6H); ESI MS: m/z=479 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 184 (2.0 mg, 15%) was obtained. 1H NMR (400 Hz CD3OD): δ7.40-7.65 (m, 5H), 7.15-7.25 (m, 1H), 7.00-7.10 (m, 1H), 4.50-4.60 (m, 1H), 3.70-3.80 (m, 2H), 3.20-3.25 (s, 3H), 2.40-2.50 (m, 2H), 2.00-2.20 (m, 2H), 1.80-1.90 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.20-1.30 (m, 6H); ESI MS: m/z=504 [M+H]+.
By using the same synthetic strategy as compound 410 described in Example 260, compound 195 (2.0 mg, 8%) was obtained. 1H NMR (400 Hz CD3OD): δ7.55-7.70 (m, 3H), 7.50-7.55 (s, 1H), 7.30-7.40 (m, 1H), 7.00-7.10 (m, 1H), 4.50-4.60 (m, 1H), 3.70-3.80 (m, 2H), 3.20-3.25 (s, 3H), 2.40-2.50 (m, 1H), 2.00-2.20 (m, 2H), 1.85-1.95 (m, 1H), 1.55-1.65 (m, 1H), 1.30-1.50 (m, 2H), 1.20-1.30 (m, 6H); ESI MS: m/z=506 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL tube was treated sequentially with the solution of compound 418a (20 mg, 0.05 mmol) in 1,4-dioxane (2 mL), Cs2CO3 solution (2 N, 0.3 mL), and 2-(1H-imidazol-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydrothiazole (27.7 mg, 0.1 mmol) under Ar2. The mixture was heated in microwave at 120° C. for 20 min., concentrated in vacuo, and the residue was purified by preparative TLC and HPLC to give compound 418 (1.45 mg, 12%). 1H-NMR (400 MHz CD3OD): δ8.51 (d, 1H), 7.86 (t, 1H), 7.73 (s, 1H), 7.62 (s, 1H), 7.52 (d, 1H), 7.17 (d, 1H), 7.00 (s, 1H), 3.62-3.86 (m, 2H), 3.52 (d, 2H), 3.24 (s, 3H), 2.28-2.41 (m, 2H), 2.02 (s, 1H), 1.92 (s, 1H), 1.83 (d, 1H), 1.54 (s, 1H); ESI MS: m/z 451.2 [M+Na]+.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the compound 370a (20 mg, 0.05 mmol) in 1,4-dioxane (2 mL), Cs2CO3 (2 N, 0.3 mL) and 2-(1H-imidazol-1-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydrothiazole (27.7 mg, 0.1 mmol). The mixture was heated under microwave at 120° C. for 20 min. The reaction mixture was concentrated in vacuo, and the residue was purified by preparative TLC and HPLC to give compound 370 (1.58 mg, 14%). 1H-NMR (400 MHz CD3OD): δ8.52 (s, 1H), 8.21 (s, 1H), 7.94 (d, 1H), 7.82 (s, 1H), 7.68 (s, 1H), 7.21 (s, 1H), 6.96 (t, 1H), 4.03 (d, 1H), 3.73 (t, 2H), 3.41 (d, 3H), 2.64 (d, 1H), 2.19 (s, 1H), 1.98 (t, 1H), 1.84 (t, 1H), 1.63 (t, 1H), 1.32-1.51 (m, 2H), 1.26 (d, 6H); ESI MS: m/z 481.3 [M+H]+.
A mixture of compound 245a (20 g, 137 mmol) and zinc(II) iodide (0.874 g, 2.74 mmol) in CH2Cl2 (300 mL) was slowly added trimethylsilanecarbonitrile (40.9 mL, 205.5 mmol) at 0° C. This mixture was stirred at room temperature overnight, washed with 300 mL of saturated aqueous sodium bicarbonate solution. The organic layer was dried (MgSO4), and concentrated in vacuo to give the compound 245b (32 g, 97%), which was used for the next step without purification.
A mixture of compound 245b (16.1 g, 65.5 mmol) and SnCl2. 2H2O (56 g, 248.3 mmol) in a mixture of acetic acid (60 mL) and concentrated HCl solution (60 mL) was refluxed overnight. The mixture was extracted with CH2Cl2 (150 mL×3). The combined organic phase was washed with 2N sodium hydroxide solution (100 mL×3). The combined basic washes were extracted with ether (100 mL×2), and subsequently acidified to pH=2 with 5N HCl solution. The acidic aqueous mixture was extracted with EA (150 mL×3), and the combined organic layer was dried and concentrated in vacuo to give the compound 245c (10 g, 85%), which was used for the next step without purification. 1H-NMR (400 MHz CDCl3): δ10.7 (br s, 1H), 7.05-7.20 (m, 4H), 3.76 (m, 1H), 2.78 (m, 2H), 2.08 (m, 2H), 1.85-2.01 (m, 2H).
To a stirred solution of LAH (3.5 g, 92 mmol) in THF (50 mL) was cooled to 0° C., and was added compound 245c (8 g, 45.5 mmol). The mixture was stirred overnight, quenched by water (3.5 mL) and aqueous NaOH (10%, 3.5 mL) at 0° C., and filtered. The cake was washed with EtOAc for 3 times, and the filtrate was dried and concentrated in vacuo to give the compound 245d (7.2 g, 98%). 1H-NMR (400 MHz CDCl3): δ7.05-7.20 (m, 4H), 3.76 (m, 2H), 2.98 (m, 1H), 2.78 (m, 2H), 1.65-1.94 (m, 5H).
To a solution of compound 245d (3 g, 18.5 mmol) in dry CH2Cl2 (60 mL) was added 3 Å molecule series (1.9 g) and PCC (6 g, 27.8 mmol). The mixture was stirred at room temperature for 2 h, and TLC showed that the reaction was completed. The mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuo to give the compound 245e (1.4 g, 46%).
To a stirred solution of compound 245f (1.8 g, 8.7 mmol) in a mixture of EtOH (11.4 mL) and H2O (18.3 mL) was added compound 245e (1.4 g, 8.7 mmol) and borax (3.31 g, 8.7 mmol). The mixture was refluxed for 2 days. The mixture was filtrated, and the filtrate was removed in vacuo. The residue was dissolved in CH2Cl2, and filtrated.
The solvents were evaporated, the crude product was purified by column chromatography to give the compound 245g (600 mg, crude).
To a solution of compound 245g (300 mg, 0.84 mmol), compound 245h (247 mg, 1.68 mmol), Cs2CO3 solution (2 M, 1.0 mL) in 1,4-dioxane (4.2 mL) was added Pd(PPh3)2Cl2 (15 mg) under N2. The mixture was stirred at 100° C. for 6 minutes, and cooled to room temperature. After extraction, the organic layer was dried and concentrated. The residue was purified by TLC to give the compound 245i (100 mg, 31%). 1H-NMR (400 MHz CDCl3): δ8.00 (m, 1H), 7.74 (m, 3H), 7.63 (m, 1H), 7.52 (m, 1H), 7.48 (m, 1H), 7.06 (m, 4H), 4.61-4.32 (m, 1H), 3.21-3.47 (m, 1H), 2.74 (m, 3H), 2.58 (m, 1H), 2.08 (m, 1H), 1.84 (m, 2H), 1.75 (m, 1H).
To a solution of compound 245i (75 mg, 0.20 mmol) in CH2Cl2 (2 mL) was added TiCl4 (1 M in DCM, 74 mg, 0.40 mmol). The mixture was stirred in microwave at 50° C. for 10 minutes. Bis-trimethylsilylcarbodiimide (74 mg, 0.40 mmol) was added, and the resulting mixture was stirred in microwave at 60° C. for 10 minutes. The reaction mixture was poured into the ice-water, extracted with DCM, dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated in vacuo to give the compound 245j (70 mg, 87.5%).
To a solution of methylhydroxylamine HCl salt (16 mg, 0.17 mmol) in anhydrous MeOH (5 mL) was added NaOMe (10% in MeOH, 24 mg, 0.16 mmol) and compound 245j (70 mg, 0.17 mmol). After being stirred for 20 minutes, the solvent was removed in vacuo, and the residue was dissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed, the residue was purified by preparative HPLC to give the compound 245 (6.48 mg, 8%) and compound 247 (1.5 mg, 2%).
compound 245: 1H-NMR (400 MHz CD3OD): δ7.98 (m, 1H), 7.92 (m, 2H), 7.72 (m, 2H), 7.59 (m, 1H), 7.30 (m, 1H), 7.15 (m, 3H), 7.00 (m, 1H), 461-4.74 (m, 1H), 3.47 (m, 1H), 3.33 (m, 3H), 2.78 (m, 2H), 2.45-2.61 (m, 1H), 1.85-2.10 (m, 4H), 1.75 (m, 1H); ESI MS: m/z 451 [M+H]+.
compound 247: 1H-NMR (400 MHz CD3OD): δ7.92-7.97 (m, 3H), 7.59-7.72 (m, 3H), 7.34 (m, 1H), 7.14 (m, 3H), 7.00 (m, 1H), 461-4.74 (m, 1H), 3.36 (m, 4H), 2.78 (m, 2H), 2.45-2.61 (m, 2H), 1.85-2.10 (m, 3H), 1.75 (m, 1H); ESI MS: m/z 451 [M+H]+.
To the mixture of compound 279a (15 g, 67.5 mmol) and zinc (II) iodide (0.6 g, 1.25 mmol) in CH2Cl2 (300 mL) was cooled to 0° C., and slowly added trimethylsilanecarbonitrile (15 g, 101.8 mmol). The mixture was stirred at room temperature overnight, washed with 300 mL of saturated aqueous sodium bicarbonate solution, and the organic layer was dried (MgSO4), and concentrated in vacuo to give the compound 279b (25 g, 98%), which was used for the next step without purification. 1H-NMR (400 MHz CDCl3): δ7.45 (m, 1H), 7.11 (m, 1H), 6.85 (m, 1H), 6.71 (m, 1H), 4.18 (m, 2H), 2.22 (m, 2H), 0.05 (m, 9H).
A mixture of compound 279b (16.2 g, 65.5 mmol) and SnCl (56 g, 248.3 mmol) in a mixture of acetic acid (60 mL) and concentrated HCl (60 mL) was heated to reflux for 3 days. The mixture was extracted with CH2Cl2 (150 mL×3), washed with 2N sodium hydroxide (100 mL×3). The combined basic washes were extracted with ether (100 mL×2), and subsequently acidified to pH=2 with 5N HCl solution. The acidic aqueous mixture was extracted with EA (150 mL×3), and the combined organic layer was dried and concentrated in vacuo to give the compound 279c (10 g, 85%), which was used for the next step without purification. 1H-NMR (400 MHz CDCl3): δ8.05-9.05 (m, 1H), 7.20 (m, 1H), 7.05 (m, 1H), 6.85 (m, 2H), 4.21 (m, 2H), 3.51-3.74 (m, 1H), 2.01-2.31 (m, 2H).
To a stirred solution of LAH (5.34 g, 140.5 mmol) in THF (100 mL) under N2 was added compound 279c (10 g, 56.18 mmol) at 0° C. The mixture was stirred overnight. Aqueous NaOH (1 N, 12 mL) was added at 0°, and the mixture was filtered. The cake was washed with EtOAc for three times, and the filtrate was dried and concentrated to give the compound 279d (7.8 g, 86%).
To a solution of compound 279d (3 g, 18.5 mmol) in dry CH2Cl2 (60 mL) was added 3 Å molecule series (1.9 g) and PCC (6 g, 27.8 mmol). The mixture was stirred at room temperature for 2 h, and TLC showed that the reaction was completed. The mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuum to give the compound 279e (1.6 g, 53%). 1H-NMR (400 MHz CDCl3): δ9.62 (m, 1H), 7.82 (m, 1H), 7.45 (m, 1H), 7.05-7.21 (m, 2H), 4.50 (m, 2H), 4.11 (m, 1H), 2.75 (m, 2H).
To a stirred solution of compound 279f (2.12 g, 10 mmol) in a mixture of EtOH (13 mL) and H2O (21.3 mL) was added compound 279e (1.6 g, 10 mmol) and borax (3.81 g, 10 mmol). The mixture was refluxed overnight. The mixture was filtrated, and the filtrate was removed in vacuo. The residue was dissolved in CH2Cl2. After filtration, the solvents were evaporated, the crude product was purified by column chromatography to give the compound 279g (600 mg, crude).
To a solution of compound 279g (100 mg, 280 mmol), compound 279h (61.74 mg, 420 mmol), Cs2CO3 solution (2 M, 1.5 mL) in 1,4-dioxane (4 mL) was added Pd(PPh3)2Cl2 (25 mg) under N2. The mixture was stirred at 100° C. for 20 min, cooled to room temperature, dried, and concentrated. The residue was purified by pre-TLC to give the compound 279i (30 mg, crude).
To a solution of compound 279i (30 mg, 0.079 mmol) in CH2Cl2 (1 mL) was added TiCl4 (1 M in DCM, 0.157 mL, 0.157 mmol). This mixture was stirred in microwave at 50° C. for 10 minutes, and bis-trimethylsilylcarbodiimide (0.039 mL, 0.174 mmol) was added. The resulting mixture was stirred in microwave at 60° C. for 10 minutes, poured into ice-water, extracted with DCM. The combined organic phases were dried over anhydrous
Na2SO4, and filtered. The filtrate was concentrated to give the compound 279j (30 mg, crude).
To a solution of methylhydroxylamine HCl salt (6.2 mg, 0.074 mmol) in anhydrous MeOH (2 mL) was added NaOMe (10% in MeOH (Wt. %), 3.6 mg, 0.067 mmol), followed by compound 279j (30 mg, 0.074 mmol). After being stirred at room temperature for 20 minutes, the solvent was removed in vacuo. The residue was dissolved in DCM (5 mL), and the mixture was filtered. The solvent was removed, and the residue was purified by preparative HPLC to give the compound 279 (2.03 mg, 6%), and compound 331 (1.12 mg, 4%).
compound 279: 1H-NMR (400 MHz CD3OD): δ7.91 (m, 3H), 7.55-7.62 (m, 3H), 7.22 (m, 1H), 7.01 (m, 2H), 6.71 (m, 2H), 4.51 (m, 1H), 4.22 (m, 2H), 3.33 (m, 3H), 2.88 (m, 1H), 2.55-2.61 (m, 1H), 2.33 (m, 1H), 2.05 (m, 2H); ESI MS: m/z 453 [M+H]+.
compound 331: 1H-NMR (400 MHz CD3OD): δ7.88 (m, 3H), 7.51-7.63 (m, 3H), 7.19 (m, 1H), 7.01-7.32 (m, 2H), 6.70-6.82 (m, 2H), 4.57 (m, 1H), 4.13-4.25 (m, 2H), 3.42 (m, 3H), 2.88-3.05 (m, 1H), 2.33-2.61 (m, 3H), 2.05 (m, 2H); ESI MS: m/z 453 [M+H]+.
To a stirred solution of compound 396a (0.64 g, 5 mmol) in MeOH (40 mL) was added compound 396A (0.72 g, 3.3 mmol) and pyrrolidine (0.41 mL). The mixture was refluxed overnight. TLC showed that the reaction was completed, and the solvent was removed under reduced pressure. The residue was dissolved in EtOAc (100 mL), washed with brine (60 mL), dried over Na2SO4 and concentrated. The residue was purified by pre-TLC (petroleum ether:EA=5:1) to give the compound 396b (359 mg, yield 22%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ7.91 (s, 1H), 7.49-7.52 (d, 1H), 6.80-6.83 (d, 1H), 3.96-4.04 (t, 1H), 3.62-3.67 (dd, 1H), 2.51-2.69 (dd, 2H), 1.87-1.97 (t, 2H), 1.58-1.68 (m, 1H), 1.33-1.37 (d, 1H), 1.27 (s, 3H), 1.12 (s, 3H).
To a solution of compound 396b (124 mg, 0.38 mmol), 3-cyanophenylboronic acid (112 mg, 0.76 mmol), Cs2CO3 (2 M, 2.25 mL) in 1,4-dioxane (4 mL) under N2 was added Pd(PPh3)2Cl2 (37 mg). The mixture was stirred in microwave at 100° C. for 30 minutes, cooled to room temperature, TLC showed that the reaction was completed. After work up and purification by pre-TLC (petroleum ether:EA=5:1), compound 396c (118 mg, 89%) was obtained as a white solid. 1H-NMR (CDCl3 400 MHz): δ8.01 (s, 1H), 7.72-7.78 (t, 2H), 7.63-7.67 (d, 1H), 7.55-7.57 (d, 1H), 7.45-7.50 (t, 1H), 7.02-7.05 (d, 1H), 4.01-4.10 (t, 1H), 3.65-3.72 (m, 1H), 2.57-2.76 (q, 2H), 1.92-2.03 (t, 1H), 1.37-1.49 (m, 1H), 1.32 (s, 3H), 1.14 (s, 3H).
To a solution of compound 396c (60 mg, 0.173 mmol) in CH2Cl2 (4 mL) was added TiCl4 (1 M in CH2Cl2, 0.22 mL, 0.224 mmol). This mixture was stirred at room temperature for 1 h, bis-trimethylsilylcarbodiimide (0.085 mL, 0.38 mmol) was added, and the resulting mixture was stirred at room temperature overnight. TLC showed that the reaction was completed, the reaction mixture was poured into ice-water (12 mL), and extracted with CH2Cl2 (20 mL×2). The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give the compound 396d (66 mg, crude, 100%) as a white solid, which was used directly for the next step without purification.
To a solution of MeNHOH.HCl (7.2 mg, 0.086 mmol) in anhydrous MeOH (3 mL) was added MeONa (10% in MeOH, 40 mg, 0.077 mmol) and compound 396d (32 mg, 0.086 mmol). After being stirred for 30 min at room temperature, TLC showed that the reaction was completed. The solvent was removed under reduced pressure. and the residue was dissolved in CH2Cl2 (10 mL). The mixture was filtered, and the filtrate was concentrated. The residue was purified by prep-TLC and pre-HPLC to give compound 396 (3.94 mg, yield 11%) as a white solid. 1H-NMR (CD3OD 400 MHz): δ7.87-7.91 (t, 2H), 7.67-7.68 (s, 2H), 7.56-7.63 (m, 2H), 6.95-6.98 (d, 1H), 4.17-4.25 (m, 0.6H), 3.95-4.01 (t, 0.4H), 3.68-3.74 (m, 0.6H), 3.58-3.65 (m, 0.4H), 3.10 (s, 3H), 1.75-2.38 (m, 4H), 1.54-1.74 (m, 2H), 1.52 (s, 1.4H), 1.34 (s, 1.6H), 1.23 (s, 1.4H), 1.65 (s, 1.6H); ESI MS: 419 [M+H]+.
A mixture of compound 206a (0.5 g, 1.48 mmol), KCN (193 g, 3 mmol), and (NH4)2CO3 (1.1 g, 11 mmol) in a mixture of formamide (34 mL) and DMF (3 mL) was heated at 110° C. in a microwave reactor for 2 h. The reaction mixture was cooled and poured into ice water. The mixture was acidified with concentrate HCl solution. The resulting precipitate was filtered, washed twice with water, and dissolved in ethyl acetate. The organic solution was dried over Na2SO4, and filtered. The filtrate was concentrated in vacuo, and the residue was purified by silica gel column to give the compound 206b (480 mg, 60%). 1H-NMR (400 Hz CDCl3): δ7.30 (m, 1H), 7.29 (m, 1H), 7.23 (m, 1H), 7.23 (m, 1H), 6.77 (m, 1H), 4.46 (m, 1H), 3.96 (m, 1H), 3.75 (m, 2H), 2.11 (m, 5H), 1.93 (m, 1H), 1.67 (m, 7H).
A suspension of compound 206b (360 mg, 0.89 mmol) and Lawesson's Reagent (358 mg, 0.89 mmol) in dry 1,4-dioxane (5 mL) was heated at 120° C. in microwave for 0.5 h. The mixture was concentrated in vacuo, and the residue was purified by TLC to give the compound 206c (114 mg, 40%).
To a solution of compound 206c (100 mg, 0.24 mmol) in MeOH (25 mL) was added NaOH solution (0.5 mL, 0.3 mol, 0.6 N aq.) and MeI (240 mg, 1.7 mmol). The reaction mixture was heated at 60° C. in microwave reactor for 15 min, and concentrated in vacuo. The residue was purified by preparative TLC to give the compound 206d (47 mg, 44%).
A solution of compound 206d (47 mg, 0.1 mmol), NH4I (38 mg, 0.26 mmol) in NH3/EtOH (4 mL, 1.5 N) in a tube was heated at 120° C. in a microwave reactor for 2 h. After being cooled down, the mixture was concentrated in vacuum, the residue was purified by preparative TLC to afford the compound 206e (20 mg, 47%).
Pd(PPh3)2Cl2 (8 mg, 0.011 mmo), Cs2CO3 (2 N, 0.3 mL) and 3-cyanophenylboronic acid (10 mg, 0.068 mmol) were added to a solution of compound 5 (20 mg, 0.048 mmol) in 1,4-dioxane (1 mL) in a 10 mL tube. The mixture was heated at 12° C. in a microwave reactor for 20 min, concentrated in vacuo, the residue was purified by preparative TLC and HPLC to give compound 206 (5.26 mg, 25%). 1H-NMR (400 Hz CD3OD): δ7.80-8.00 (m, 2H), 7.50-7.65 (m, 3H), 7.30-7.50 (m, 1H), 7.00-7.10 (m, 1H), 4.40-4.50 (m, 1H), 3.95-4.05 (m, 1H), 3.70-3.80 (m, 2H), 3.30-3.35 (m, 1H), 3.20-3.25 (s, 2H), 2.30-2.45 (m, 1H), 2.00-2.20 (m, 3H), 1.65-1.85 (m, 6H); ESI MS: m/z=443 [M+H]+.
The solution of LAH (640 mg, 16.8 mmol) in 20 mL of dry THF at 0° C. was added the solution of compound 422a (2 g, 11.2 mmol) in THF (10 mL) dropwise, and the reaction mixture was stirred at room temperature for 2 hour. The reaction was quenched with 7 mL of H2O and 7 mL of 10% NaOH solution. The solution was filtered, and the filtrate was concentrated to give the compound 422b (1.8 g, 100%). 1H NMR (400 MHz CDCl3): δ7.12 (m, 2H), 6.87 (m, 2H), 4.34 (m, 1H), 4.08 (m, 1H), 3.75 (m, 2H), 2.91 (m, 1H), 2.53 (m, 13H), 2.29 (m, 1H).
To a solution of compound 422b (970 mg, 5.99 mmol) in DCM (25 mL) was added 3 Å molecular sieves (500 mg) and PCC (1.94 g, 8.98 mmol). The reaction mixture was stirred at room temperature for 2 h, filtered, washed with DCM, dried, and concentrated to give compound 422c (681 mg, 71%). 1H NMR (400 MHz CDCl3): δ7.04-7.22 (m, 2H), 6.73-6.88 (m, 2H), 2.91-3.13 (m, 3H), 1.31-4.42 (m, 2H).
To a solution of compound 422c (681 mg, 4.23 mmol) in a mixture of H2O (6 mL) and EtOH (3.6 mL) was added 1-(5-bromo-2-hydroxyphenyl)ethanone (1.09 mg, 5.08 mmol) and borax (2.42 mg, 6.35 mmol). The reaction mixture was refluxed overnight, cooled, and filtered. EtOH was removed, and the aqueous was extracted with DCM (30 mL×3). The organic layer was dried, concentrated, and purified by preparative TLC to afford the compound 422d (170 mg, 11%). 1H NMR (400 MHz CDCl3): δ7.92 (s, 1H), 7.51 (m, 1H), 7.06 (m, 2H), 6.72-6.88 (m, 3H), 4.45 (m, 1H), 4.22-4.38 (m, 1H), 4.08 (m, 1H), 2.95 (m, 1H), 2.52-2.89 (m, 3H), 2.46 (m, 1H).
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of flask under N2 was treated sequentially with the solution of compound 422d (90 mg, 0.25 mmol) in 1,4-dioxane (1.5 mL), Cs2CO3 solution (2 N, 0.25 mL), and 3-cyanophenylboronic acid (37 mg, 0.5 mmol). The mixture was heated at 100° C. under N2 in microwave for 10 minutes. The organic layer was concentrated in vacuo, and the residue was purified by preparative TLC to give the compound 422e (75 mg, 78%). 1H NMR (400 MHz CDCl3): δ8.03 (s, 1H), 7.77 (m, 2H), 7.66 (m, 1H), 7.54 (m, 1H), 7.48 (m, 1H), 6.99-7.11 (m, 3H), 6.72-6.88 (m, 2H), 4.49 (m, 1H), 4.11-4.30 (m, 2H), 2.62-3.03 (m, 4H), 2.48 (m, 1H).
To a solution of compound 422e (85 mg, 0.22 mmol) in dried CH2Cl2 (5 mL) was added TiCl4 (1 M solution in DCM, 0.44 mL) at room temperature dropwise within 15 minutes. The mixture was stirred for 1 h, and added bis-trimehtlysilylcarbodiimide (125 mg, 0.66 mmol) dropwise. The resulting mixture was stirred overnight, poured into ice-water, and extracted with CH2Cl2. The combined organic layer was washed with brine, dried over Na2SO4, filtered, and concentrated to give the compound 422f (100 mg, crude), which was used for the next step without further purification.
To a solution of MeNHOH.HCl (21 mg, 0.25 mmol) in anhydrous MeOH (3 mL) was added NaOMe (10% in MeOH, 122 mg, 0.225 mmol) and compound 422f (100 mg, 0.25 mmol) at room temperature. After being stirred for 10 minutes, the solvent was removed in vacuum. The residue was dissolved in CH2Cl2 and filtered. The filtrate was concentrated, the residue was purified by preparative TLC and HPLC to afford the compound 422 (5.5 mg, 5%). 1H NMR (400 MHz CD3OD): δ7.98 (m, 3H), 7.66 (m, 3H), 7.09 (m, 3H), 6.81 (d, 2H), 4.46 (m, 2H), 4.17 (m, 1H), 3.43 (m, 3H), 2.70-3.09 (m, 3H), 2.49 (m, 1H), 2.11 (m, 1H); ESI MS: m/z 452 [M+H]+.
A mixture of compound 219a (30 mg, 0.079 mmol), 3,5-dichlorophenylboronic acid (22 mg, 0.12 mmol), Cs2CO3 solution (2 M, 0.3 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under N2 was stirred at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give the compound 219 (1.85 mg, 5%). 1H-NMR (400 MHz CD3OD): δ7.91 (m, 1H), 7.67 (m, 1H), 7.58 (m, 2H), 7.45 (m, 1H), 7.12 (m, 1H), 4.18 (m, 0.3H), 3.82 (m, 0.7H), 3.58 (m, 2H), 3.37 (m, 3H), 3.16 (m, 0.6H), 2.48 (m, 0.4H), 1.95-2.20 (m, 2H), 1.41-1.96 (m, 3H), 1.21 (m, 3H); ESI MS: m/z 448 [M+H]+.
To a solution of compound 371a (100 mg, 0.32 mmol) in CH2Cl2 (15 mL) was added TiCl4 (1 M in DCM, 0.65 mL, 0.65 mmol). This mixture was stirred for 1 h at room temperature. Bis-trimethylsilylcarbodiimide (0.157 mL, 0.704 mmol) was added, and the resulting mixture was stirred overnight. The reaction mixture was poured into ice-water, extracted with DCM, dried over anhydrous Na2SO4, filtered, and concentrated to give the compound 371b (30 mg, 28%).
To a solution of methylhydroxylamine HCl salt (7.56 mg, 0.090 mmol) in anhydrous MeOH (2 mL) was added NaOMe (10% in MeOH, 0.045 mL) at room temperature, followed by addition of compound 371b (30 mg, 0.09 mmol). After being stirred for 25 minutes, the solvent was removed in vacuo, and the residue was redissolved in DCM (50 mL). The mixture was filtered, and the solvent was removed. The residue was purified by TLC to give the compound 371c (20 mg, 59%). 1H-NMR (400 MHz CDCl3): δ7.45 (m, 1H), 7.21 (m, 1H), 6.60 (m, 1H), 4.08 (m, 1H), 3.80 (m, 1H), 3.32-3.52 (m, 2H), 3.00 (m, 3H), 2.65 (m, 1H), 2.3 (m, 3H), 2.11-2.2 (m, 2H), 1.22 (m, 3H).
A mixture of compound 371c (20 mg, 0.052 mmol), 3,5-dichlorophenylboronic acid (14.7 mg, 0.078 mmol), Cs2CO3 solution (2 M, 0.300 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under Ar2 was stirred in microwave at 120° C. for 18 minutes. The reaction mixture was concentrated in vacuum, and the residue was purified by preparative TLC and HPLC to give compound 371 (1.50 mg, 7%). 1H-NMR (400 MHz CD3OD): δ8.00 (m, 1H), 7.70 (m, 1H), 7.55 (m, 2H), 7.45 (m, 1H), 7.00 (m, 1H), 3.88-4.20 (m, 1H), 3.50 (m, 2H), 3.33 (m, 3H), 2.55-2.72 (m, 2H), 1.80-2.22 (m, 2H), 1.50-1.88 (m, 2H), 1.3 (m, 3H); ESI MS: m/z 448 [M+H]+.
A mixture of compound 274a (25 mg, 0.116 mmol), 3-chloro-5-methoxyphenylboronic acid (43.15 mg, 0.232 mmol), Cs2CO3 solution (2 M, 0.375 mL), and Pd(PPh3)2Cl2 (6.25 mg) in 1,4-dioxane (1 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give the compound 274 (1.17 mg, 6%). 1H-NMR (400 MHz CD3OD): δ7.66-7.91 (m, 3H), 7.55 (m, 1H), 7.35 (m, 1H), 7.00 (m, 1H), 3.88-4.20 (m, 1H), 3.50 (m, 2H), 3.33 (m, 3H), 2.55-2.72 (m, 2H), 1.80-2.22 (m, 2H), 1.50-1.88 (m, 2H), 1.30 (m, 3H); ESI MS: m/z 444 [M+H]+.
A mixture of compound 232a (25 mg, 0.066 mmol), 3-chloro-5-fluorophenylboronic acid (23 mg, 0.132 mmol), Cs2CO3 solution (2 M, 0.325 mL), and Pd(PPh3)2Cl2 (6.25 mg) in 1,4-dioxane (1.2 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 232 (2.65 mg, 9%). 1H-NMR (400 MHz CD3OD): δ7.00 (m, 1H), 6.75 (m, 1H), 6.55 (m, 1H), 6.45 (m, 1H), 6.00-6.20 (m, 2H), 2.88-3.20 (m, 1H), 2.60 (m, 2H), 2.50 (m, 3H), 1.55-2.21 (m, 1H), 1.00-1.18 (m, 2H), 0.55-1.04 (m, 3H), 0.3 (m, 3H); ESI MS: m/z 432 [M+H]+.
A mixture of compound 298a (35 mg, 0.092 mmol), 3-chloro-5-fluorophenylboronic acid (32 mg, 0.184 mmol), Cs2CO3 solution (2 M, 0.525 mL), and Pd(PPh3)2Cl2 (9 mg) in 1,4-dioxane (1.8 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 298 (2.73 mg, 7%). 1H-NMR (400 MHz CD3OD): δ7.00 (m, 1H), 6.75 (m, 1H), 6.55 (m, 1H), 6.45 (m, 1H), 6.00-6.20 (m, 2H), 2.88-3.20 (m, 1H), 2.60 (m, 2H), 2.50 (m, 3H), 1.55-2.21 (m, 1H), 1.00-1.18 (m, 2H), 0.55-1.04 (m, 3H), 0.3 (m, 3H); ESI MS: m/z 432 [M+H]+.
A mixture of compound 236a (30 mg, 0.079 mmol), 3-chlorophenylboronic acid (18 mg, 0.12 mmol), Cs2CO3 solution (2 M, 0.3 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under N2 was stirred at 100° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give the compound 236 (2.16 mg, 10%). 1H-NMR (400 MHz CD3OD): δ7.85 (m, 1H), 7.67 (m, 1H), 7.62 (m, 1H), 7.52 (m, 1H), 7.41 (m, 1H), 7.32 (m, 1H), 6.98 (m, 1H), 4.19 (m, 0.3H), 3.86 (m, 0.7H), 3.58 (m, 2H), 3.36 (m, 3H), 3.16 (m, 0.6H), 2.48 (m, 0.4H), 2.12 (m, 2H), 1.72 (m, 1H), 1.41-1.74 (m, 2H), 1.18 (m, 3H); ESI MS: m/z 414 [M+H]+.
A mixture of compound 303a (30 mg, 0.079 mmol), 3-chlorophenylboronic acid (25 mg, 0.159 mmol), Cs2CO3 (2 M, 0.45 mL) and Pd(PPh3)2Cl2 (7.5 mg) in 1,4-dioxane (1.5 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 303 (2.78 mg, 8%). 1H-NMR (400 MHz CD3OD): δ7.91 (m, 1H), 7.33-7.67 (m, 5H), 7.10 (m, 1H), 4.02 (m, 1H), 3.52 (m, 2H), 3.33 (m, 3H), 266-2.71 (m, 1H), 2.35 (m, 1H), 1.80-2.22 (m, 2H), 1.50-1.77 (m, 2H), 1.3 (m, 3H); ESI MS: m/z 414 [M+H]+.
A mixture of compound 249a (20 mg, 0.052 mmol), 3-chloro-4-fluorophenylboronic acid (18.27 mg, 0.105 mmol), Cs2CO3 (2 M, 0.300 mL) and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 249 (2.88 mg, 13%). 1H-NMR (400
MHz CD3OD): δ7.66-7.91 (m, 3H), 7.55 (m, 1H), 7.35 (m, 1H), 7.00 (m, 1H), 3.88-4.20 (m, 1H), 3.50 (m, 2H), 3.33 (m, 3H), 2.55-2.72 (m, 2H), 1.80-2.22 (m, 2H), 1.50-1.88 (m, 2H), 1.3 (m, 3H); ESI MS: m/z 432 [M+H]+.
A mixture of compound 330a (30 mg, 0.079 mmol), 3-chloro-4-fluorophenylboronic acid (27 mg, 0.157 mmol), Cs2CO3 solution (2 M, 0.450 mL, and Pd(PPh3)2Cl2 (7.5 mg) in 1,4-dioxane (1.5 mL) under Ar2 was stirred in microwave at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 330 (2.02 mg, 7%). 1H-NMR (400 MHz CD3OD): δ7.66-7.91 (m, 3H), 7.55 (m, 1H), 7.35 (m, 1H), 7.00 (m, 1H), 3.88-4.20 (m, 1H), 3.50 (m, 2H), 3.33 (m, 3H), 2.55-2.72 (m, 2H), 1.80-2.22 (m, 2H), 1.50-1.88 (m, 2H), 1.3 (m, 3H); ESI MS: m/z 432 [M+H]+.
A mixture of compound 296a (20 mg, 0.047 mmol), 3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (24.6 mg, 0.094 mmol), Cs2CO3 solution (2 M, 0.300 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under Ar2 was stirred in microwave at 120° C. for 20 minutes. The reaction mixture was concentrated in vacuum, and the residue was purified by preparative TLC and HPLC to give compound 208 (1.15 mg, 5%). 1H-NMR (400 MHz CD3OD): δ8.00 (m, 3H), 7.71 (m, 2H), 7.35 (m, 1H), 7.00 (m, 4H), 4.66 (m, 1H), 3.45 (m, 1H), 3.38 (m, 3H), 2.75 (m, 2H), 2.40-2.61 (m, 2H), 2.01 (m, 3H), 1.75 (m, 1H); ESI MS: m/z 485 [M+H]+.
To a solution of compound 198a (20 mg, 0.047 mmol), 3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (17 mg, 0.071 mmol), and Cs2CO3 solution (2M, 0.3 mL) in [1,4]-dioxane (0.7 mL) was added Pd(PPh3)2Cl2 (0.5 mg). The mixture was heated at 120° C. in microwave for 15 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified by preparative TLC and
HPLC to give compound 198 (3.13 mg, 14%). 1H-NMR (400 MHz CD3OD): δ8.01 (s, 1H), 7.85 (m, 1H), 7.75 (m, 2H), 7.50 (m, 1H), 7.32 (s, 1H), 7.17 (m, 3H), 7.02 (m, 1H), 4.64 (m, 1H), 3.40 (m, 1H), 3.30 (m, 3H), 2.81 (s, 2H), 2.61 (m, 1H), 2.43 (m, 1H), 2.06 (m, 3H), 1.75 (s, 1H); ESI MS: m/z 469 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) under Ar2 was treated sequentially with the solution of compound 298a (20 mg, 0.047 mmol) in [1,4]dioxane (1 mL), Cs2CO3 solution (2 M, 0.3 mL), and 3-chloro-5-fluorophenylboronic acid (12 mg, 0.07 mmol). The mixture was heated at 120° C. in microwave for 15 minutes, and concentrated in vacuo. The residue was purified by preparative TLC and HPLC to give compound 298 (7.7 mg, 34%). 1H-NMR (400 MHz CD3OD): δ6.95-7.91 (m, 10H), 4.65 (m, 1H), 3.45 (m, 1H), 3.35 (m, 3H), 2.82 (m, 2H), 2.45 and 2.65 (d, 1H), 2.00 (m, 4H), 1.75 (m, 1H); ESI MS: m/z 478 [M+H]+.
A mixture of compound 299a (20 mg, 0.047 mmol), 3-chlorophenylboronic acid (14 mg, 0.07 mmol), Cs2CO3 solution (2 M, 0.3 mL), and Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under N2 was stirred at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, and the residue was purified by preparative TLC and HPLC to give compound 299. 1H-NMR (400 MHz CD3OD): δ7.86 (m, 1H), 7.62 (m, 2H), 7.47 (m, 2H), 7.30 (m, 2H), 7.12 (m, 3H), 6.96 (m, 1H), 4.76 (m, 0.5H), 4.64 (m, 0.5H), 3.42 (m, 1H), 3.34 (m, 3H), 2.82 (m, 2H), 2.52 (m, 1H), 2.02 (m, 4H), 1.74 (m, 1H); ESI MS: m/z 460 [M+H]+.
A mixture of compound 235a (20 mg, 0.047 mmol), 3-chloro-4-fluorophenylboronic acid (12 mg, 0.07 mmol), Cs2CO3 solution (2 M, 0.3 mL), and
Pd(PPh3)2Cl2 (5 mg) in 1,4-dioxane (1 mL) under N2 was stirred at 120° C. for 15 minutes. The reaction mixture was concentrated in vacuum, and the residue was purified by preparative TLC and HPLC to give compound 235 (2.7 mg, 12%) and compound 252 (1.12 mg, 5%).
compound 235: 1H-NMR (400 MHz CD3OD): δ7.87 (m, 1H), 7.72 (m, 2H)m, 7.53 (m, 1H), 7.32 (m, 2H), 7.16 (m, 3H), 7.02 (m, 1H), 4.62-4.82 (m, 1H), 3.48 (m, 1H), 3.35 (s, 3H), 2.83 (m, 2H), 2.42-2.68 (m, 1H), 1.85-2.18 (m, 4H), 1.78 (m, 1H); ESI MS: m/z 478 [M+H]+.
compound 252: 1H-NMR (400 MHz CD3OD): δ7.78 (m, 1H), 7.38-7.66 (m, 3H), 7.22 (m, 2H), 7.06 (m, 3H), 6.92 (m, 1H), 4.48-4.67 (m, 1H), 3.47 (m, 1H), 3.37 (m, 3H), 2.71 (m, 2H), 2.24-2.51 (m, 1H), 1.80-2.08 (m, 4H), 1.48 (m, 1H); ESI MS: m/z 478 [M+H]+.
Pd(PPh3)2Cl2 (10 mg) in a 10 mL of tube under Ar2 was treated sequentially with the compound 201a (21 mg, 0.05 mmol) in 1,4-dioxane (2 mL), Cs2CO3 solution (2 N, 0.3 mL), and 3-cyano-4-fluorophenylboronic acid (22 mg, 0.13 mmol). The mixture was heated in microwave at 120° C. for 20 minutes, concentrated in vacuo, and purified by preparative TLC and HPLC to give compound 201 (1.90 mg, 3.4%) and compound 221 (1.25 mg, 2.9%).
compound 201: 1H-NMR (400 MHz CD3OD): δ7.91-8.04 (m, 3H), 7.65-7.71 (m, 1H), 7.33-7.48 (m, 2H), 7.11-7.20 (m, 3H), 6.95-7.06 (m, 1H), 4.52-4.62 (m, 1H), 3.48-3.52 (m, 1H), 3.33-3.40 (m, 3H), 2.79-2.90 (m, 2H), 2.40-2.65 (m, 1H), 1.85-2.16 (m, 4H), 1.70-1.82 (m, 1H); ESI MS: m/z 470 [M+H]+.
compound 221: 1H-NMR (400 MHz CD3OD): δ7.91-8.02 (m, 3H), 7.66-7.69 (m, 1H), 7.33-7.44 (m, 2H), 7.11-7.15 (m, 3H), 6.98-7.07 (m, 1H), 4.58-4.65 (m, 1H), 3.45-3.52 (m, 1H), 3.33-3.43 (m, 3H), 2.75-2.83 (m, 2H), 2.41-2.62 (m, 1H), 1.92-2.16 (m, 4H), 1.71-1.80 (m, 1H); ESI MS: m/z 470 [M+H]+.
A mixture of compound 1 (20 mg, 0.048 mmol), 3,5-dicyanophenylbronic acid (16 mg, 0.094 mmol), Cs2CO3 solution (2 M, 0.300 mL), and Pd(PPh3)2Cl2 (8 mg) in 1,4-dioxane (1 mL) was stirred in microwave at 120° C. for 18 minutes under Ar2. The reaction mixture was concentrated in vacuum, the residue was purified by preparative TLC and HPLC to give compound 180 (2.78 mg, 13%). 1H-NMR (400 MHz CD3OD): δ8.29 (s, 2H), 8.06 (d, 2H), 7.74 (m, 1H), 7.30 (m, 1H), 7.15 (m, 3H), 7.00 (m, 1H), 4.63 (m, 1H), 3.40 (m, 1H), 3.30 (m, 3H), 2.80 (m, 2H), 2.62 (m, 1H), 2.40 (m, 1H), 2.08 (m, 3H), 1.75 (m, 1H); ESI MS: m/z 476 [M+H]+.
To a solution of compound 278a (2 g, 12.5 mmol) in dry CH2Cl2 (40 mL) was added 3 Å molecule series (1.3 g) and PCC (4.05 g, 18.75 mmol). The mixture was stirred at room temperature for 2 h. When the reaction was completed, the mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuum to give the compound 278b (1.4 g, 68%).
To a stirred solution of compound 278c (1.8 g, 8.7 mmol) in a mixture of EtOH (11.4 mL) and H2O (18.3 mL) was added compound 2 (1.4 g, 8.7 mmol) and borax (3.31 g, 8.7 mmol). The mixture was refluxed for 2 days, filtrated, and concentrated in vacuo. The crude product was purified by column chromatography and pre-HPLC to give the compound 278d (600 mg, 20%).
To a solution of compound 278d (356 mg, 1 mmol) in CH2Cl2 (25 mL) was added TiCl4 (1 M in DCM, 2 mg, 2 mmol). This mixture was stirred at room temperature for 60 minutes. Bis-trimethylsilylcarbodiimide (372 mg, 2 mmol) was added, and the resulting mixture was stirred overnight. The reaction mixture was poured into ice-water, extracted with DCM. The combined organic phases were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give the compound 278e (300 mg, 79%).
To a solution of methylhydroxylamine HCl salt (66 mg, 0.79 mmol) in anhydrous MeOH (10 mL) was added NaOMe (10% in MeOH, 38.4 mg, 0.71 mmol) and compound 278e (300 mg, 0.79 mmol) at room temperature. After being stirred for 20 minutes, the solvent was removed in vacuo. The residue was dissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed. The residue was purified by pre-TLC to give compound 278f (280 mg, 83%). 1H-NMR (400 MHz CDCl3): δ7.53 (m, 1H), 7.27 (m, 2H), 7.08 (m, 3H), 6.65 (m, 1H), 4.53 (m, 1H), 3.31 (m, 1H), 3.15 (m, 1H), 3.05 (m, 3H), 2.74 (m, 3H), 2.18 (m, 1H), 1.94 (m, 2H), 1.75 (m, 1H).
To a solution of compound 278f (20 mg, 0.05 mmol), 3-chloro-5-methoxyphenylboronic acid (18.6 mg, 0.1 mmol), Cs2CO3 solution (2 M, 0.5 mL) in 1,4-dioxane (1 mL) under N2 was added Pd(PPh3)2Cl2 (5 mg). The mixture was stirred at 100° C. for 6 minutes. After being cooled to room temperature, the organic layer was dried, and concentrated to give the residue, which was purified by preparative HPLC to give compound 278 (2.20 mg, 10%). 1H-NMR (400 MHz CD3OD): δ7.86 (m, 1H), 7.69 (m, 1H), 7.48 (m, 1H), 7.30 (m, 2H), 7.11 (m, 3H), 7.01 (m, 1H), 6.95 (m, 1H), 461-4.74 (m, 1H), 3.81-4.08 (m, 3H), 3.47 (m, 1H), 3.33 (m, 3H), 2.78 (m, 2H), 2.45-2.61 (m, 1.4H), 1.85-2.10 (m, 3.6H), 1.75 (m, 1H); ESI MS: m/z 490 [M+H]+.
Pd(PPh3)2Cl2 (5 mg) in a 10 mL of flask under N2 was treated sequentially with the compound 269a (20 mg, 0.047 mmol) in 1,4-dioxane (1 mL), Cs2CO3 solution (2 N, 0.1 mL), and 3-fluoro-5-(trifluoromethyl)phenylboronic acid (19.5 mg, 0.094 mmol). The mixture was heated under 120° C. at N2 under microwave for 20 minutes, and the reaction mixture was concentrated in vacuo, the residue was purified by preparative TLC and HPLC to give compound 269 (5.1 mg, 21%). 1H NMR (400 MHz CD3OD): δ7.98 (s, 1H), 7.69 (m, 3H), 7.39 (d, 2H), 7.08 (m, 4H), 4.67 (m, 1H), 3.47 (m, 1H), 3.36 (m, 3H), 2.81 (m, 2H), 2.52 (m, 1H), 2.10 (m, 4H), 1.73 (m, 1H), 1.38 (m, 1H); ESI MS: m/z 512 [M+H]+.
To a solution of compound 226a (20 g, 151 mmol) and 1.9 g of Zinc iodide in 400 mL of dichloromethane was added 15 g (151 mmol) of cyanotrimethylsilane 0° C. After being stirred overnight, the mixture was warmed to room temperature, washed with 300 mL of saturated aqueous sodium bicarbonate solution, dried, filtrated, and concentrated in vacuum to give the compound 226b (26.84 g, 77%). 1H NMR (400 MHz CDCl3): δ7.35-7.40 (m, 1H), 7.02-7.21 (m, 3H), 2.79-2.90 (m, 2H), 2.48-2.55 (m, 1H), 2.23-2.28 (m, 1H), 0.01-0.19 (m, 9H).
A solution of compound 226b (26.84 g, 116 mmol) and SnCl2.2H2O (104.86 g, 464 mmol) in 100 mL of a mixture of acetic acid and concentrated hydrochloric acid
(10:1) was refluxed for 1 day. After being cooled to room temperature, the mixture was extracted with 150 mL of dichloromethane, and the organic layers were washed with 130 mL of 2 N sodium hydroxide solution. The basic washes were extracted with 100 mL of ether, and acidified to PH=2 with 5 N hydrochloric acid solution. The acidic aqueous mixture was extracted with 150 mL of EtOAc. The combined organic layers were dried, filtered, and concentrated in vacuo to give the compound 226c. 1H-NMR (400 MHz CDCl3): δ7.35-7.40 (m, 1H), 7.21-7.31 (m, 3H), 4.07-4.19 (m, 1H), 3.11-3.21 (m, 1H), 2.89-2.98 (m, 1H), 2.32-2.54 (m, 2H).
The solution of LiAlH4 (2.1 g, 54 mmol) in 50 mL of dry THF was added a solution of compound 226c in THF (40 mL). The reaction mixture was stirred at room temperature for 2 h, quenched with 2.1 mL of H2O and 2.1 mL of 10% NaOH, filtered, and concentrated to give the compound 226d. 1H-NMR (400 MHz CDCl3): δ7.05-7.30 (m, 4H), 3.62-3.87 (m, 2H), 3.27-3.49 (m, 1H), 2.71-3.01 (m, 2H), 2.11-2.38 (m, 1H), 1.83-1.94 (m, 1H).
To a solution of compound 226d (2 g, 13.5 mmol) in DCM (50 mL) was added PCC (4.36 g, 20 mmol) and 3 Å molecule serves (2.0 g), and the mixture was stirred at room temperature for 1 h. After work up and purification, compound 226e (1.9 g, 96%) was obtained. 1H-NMR (400 MHz CDCl3): δ2.21-2.54 (m, 2H), 2.81-3.18 (m, 2H), 3.91-4.01 (m, 1H), 7.18-7.30 (m, 4H), 9.66-9.67 (m, 1H).
To a solution of 1-(5-bromo-2-hydroxyphenyl)-ethanone (2.79 g, 12.99 mmol) in a mixture of EtOH (18 mL) and H2O (28.8 mL) was added compound 226e (1.9 g, 12.99 mmol) and borax (4.96 g, 12.99 mmol). The mixture was refluxed overnight, filtered, and concentrated. The residue was dissolved in EtOAc, and the organic layer was washed with brine, dried, and concentrated. The residue was purified by chromatography to afford the compound 226f (1.0 g, 22.4%). 1H NMR (400 MHz CDCl3): δ7.89-7.91 (m, 1H), 7.34-7.56 (m, 2H), 7.12-7.27 (m, 3H), 6.80-6.89 (m, 1H), 4.52-4.56 (m, 1H), 3.52-3.67 (m, 1H), 2.87-3.09 (m, 2H), 2.51-2.81 (m, 2H), 2.22-2.26 (m, 1H), 1.97-2.21 (m, 1H).
To a solution of compound 226f (320 mg, 0.93 mmol) in 1,4-dixoane (5 mL) was added 3-cyanophenylboronic acid (273 mg, 1.86 mmol), Pd(PPh3)2Cl2 (20 mg) and Cs2CO3 solution (2 M, 1.4 mL). The reaction mixture was stirred in microwave at 100° C. for 10 minutes. The organic layer was concentrated, and the residue was purified by
HPLC to give the compound 226g (127 mg, 38%). 1H-NMR (400 MHz CDCl3): δ2.21-2.41 (m, 1H), 2.52-2.76 (m, 2H), 2.81-3.01 (m, 2H), 3.57-3.69 (m, 1H), 4.52-4.67 (m, 1H), 7.02-7.26 (m, 6H), 7.42-7.79 (m, 4H), 7.99-8.01 (m, 1H).
To a solution of compound 226g (127 mg, 0.35 mmol) in DCM (18 mL) was added TiCl4 (194.3 mg, 1.04 mmol) at room temperature. After being stirred for 1 h, bis-trimehtlysilylcarbodiimide (131 mg, 0.70 mmol) was added, and the mixture was stirred at room temperature overnight. The reaction was quenched with ice water and extracted with DCM. The organic layer was washed with water and brine, dried, and concentrated to give the compound 226h (79 mg, 58%).
To a solution of MeNHOH.HCl (16.9 mg, 0.2 mmol) in anhydrous MeOH (3 mL) was added NaOMe (10% in MeOH, 98 mg, 0.18 mmol) at room temperature and 226h (79 mg, 0.2 mmol). After being stirred for 5 minutes, the mixture was concentrated in vacuum, and the residue was redissolved in CH2Cl2 and filtered. The filtrate was concentrated, and the residue, was purified by preparative TLC and HPLC to give compound 226 (18 mg, 20%). 1H-NMR (400 MHz CD3OD): δ7.85-7.90 (m, 3H), 7.50-7.66 (m, 3H), 7.16-7.25 (m, 2H), 6.90-7.11 (m, 3H), 4.39-4.71 (m, 1H), 3.57-3.59 (m, 2H), 3.32-3.55 (s, 3H), 2.61-2.98 (m, 2H), 2.45-2.58 (m, 1H), 2.00-2.25 (m, 1H), 1.57-1.97 (m, 1H); ESI MS: m/z 437 [M+H]+.
NaH (5.12 g, 128 mmol) was added to a solution of compound 204a (25 g, 107 mmol) in THF (200 mL) at room temperature in small portions. Allyl bromide (11.1 mL, 128 mmol) was added via syringe, and the mixture was stirred overnight at room temperature, quenched by the addition of H2O (100 mL) slowly, and diluted with 300 mL of Et2O. The organic layer was washed with H2O and brine, dried (magnesium sulfate), filtered, and concentrated in vacuo to yield the compound 204b (31 g crude, 100%) as faint yellow oil. 1H-NMR (400 MHz CDCl3): δ7.45 (m, 1H), 7.11 (m, 1H), 6.85 (m, 1H), 7.81-7.83 (d, 1H), 7.45-7.47 (t, 1H), 7.33-7.37 (t, 1H), 6.96-7.00 (t, 1H), 5.95-6.05 (m, 1H), 5.33-5.39 (d, 1H), 5.22-5.26 (d, 1H), 4.50 (s, 2H), 4.11-4.13 (d, 2H).
The solution of compound 204b (55 g, 201 mmol) in a mixture 250 mL of CH3CN and 145 mL of Et3N was degassed, and added Pd (OAc)2 (2.23 g, 10 mmol) and PPh3 (5.28 g, 20.1 mmol). The mixture was heated at 80° C. until TLC indicated completion of the reaction. The mixture was cooled to room temperature, diluted with Et2O (500 mL), washed with 1 N HCl, NaHCO3, and brine, dried (sodium sulfate), filtered, and concentrated in vacuo to yield the compound 204c (15 g, 51%) as oil. 1H-NMR (400 MHz CDCl3): δ7.59-7.63 (d, 1H), 7.15-7.19 (t, 2H), 6.95-6.98 (d, 1H), 5.54 (s, 1H), 4.94 (s, 1H), 4.74 (s, 2H), 4.38 (s, 2H).
To a solution of compound 204c (13 g, 89 mmol) in THF (400 mL) was added a solution of B2H6.THF (1.0 M, 45 mL, 45 mmol) under N2 at 0° C. The mixture was stirred at room temperature for 3 hours, added aqueous NaOH solution (3 N, 22 mL, 67 mmol) and H2O2 (30%, 15.2 mL, 134 mmol) at room temperature, stirred for 2 hours, quenched by addition of brine. The reaction mixture was extracted with EtOAc, and the organic layer was washed with aq. Na2S2O3, dried, and concentrated to give the crude compound 204d (10 g, 69%). 1H-NMR (400 MHz CDCl3): δ7.59-7.63 (d, 1H), 7.17-7.24 (m, 3H), 6.99-7.01 (t, 1H), 4.73-4.89 (q, 2H), 4.25-4.28 (d, 1H), 3.61-3.95 (m, 3H), 2.83-2.84 (m, 1H).
To a solution of compound 204d (5 g, 30 mmol) in dry CH2Cl2 (150 mL) was added 3 Å molecule series (6 g) and PCC (9.7 g, 45 mmol). The mixture was stirred at room temperature for 1 h, when the reaction was completed, the mixture was filtered through celite, dried over Na2SO4, and concentrated in vacuum to give the compound 204e (5 g, crude, 100%).
To a stirred solution of compound 204e (6.5 g, 30 mmol) in a mixture of EtOH (50 mL) and H2O (80 mL) was added isochroman-4-carbaldehyde (5.0 g, 30 mmol) and borax (11.4 g, 30 mmol). The mixture was refluxed overnight, filtrated, and concentrated in vacuo. The residue was dissolved in CH2Cl2, after filtration. the solvents were evaporated, and the crude product was purified by column chromatography to give the compound 204f (200 mg, 2%). 1H-NMR (400 MHz CDCl3): δ7.89 (s, 1H), 7.48-7.51 (d, 1H), 7.13-7.21 (m, 3H), 6.95-6.97 (d, 1H), 6.88-6.90 (d, 1H), 4.69-4.81 (q, 3H), 4.38-4.41 (dd, 1H), 3.73-3.77 (dd, 1H), 3.02-3.04 (d, 1H), 2.72-2.77 (dd, 1H), 2.54-2.61 (t, 1H).
To a solution of compound 204f (123 mg, 0.84 mmol) in a mixture of Cs2CO3 solution (2 M, 2.25 mL) and 1,4-dioxane (5 mL) was added Pd(PPh3)2Cl2 (37.5 mg) under N2. The mixture was stirred in microwave at 100° C. for 20 minutes. After being cooled to room temperature, the mixture was concentrated, and the residue was purified by TLC to give the compound 204g (31 mg, 19%). 1H-NMR (400 MHz CDCl3): δ2.40-2.45 (d, 0.7H), 2.58-2.83 (m, 0.3H), 3.07-3.19 (m, 1.6H), 3.72-3.86 (m, 1.4H), 4.53-4.57 (d, 1H), 4.71-4.79 (m, 3H), 6.98-7.00 (d, 1H), 7.07-7.09 (d, 1H), 7.18-7.19 (m, 3H), 7.45-7.49 (t, 1H), 7.54-7.56 (d, 1H), 7.64-7.66 (d, 1H), 7.72-7.78 (t, 2H), 8.01 (s, 1H).
To a solution of compound 204g in CH2Cl2 (2 mL) was added TiCl4 (1 M in DCM, 0.22 mL, 0.22 mmol), and the mixture was stirred in microwave at 50° C. for 10 minutes. The bis-trimethylsilylcarbodiimide (0.053 mL, 0.237 mmol) was added, and the resulting mixture was stirred in microwave at 60° C. for 10 minutes. The reaction mixture was poured into ice-water, extracted with DCM, dried over anhydrous Na2SO4, filtered, and concentrated to give the compound 204h (42 mg, crude, 96%).
To a solution of methylhydroxylamine HCl salt (9.1 mg, 0.108 mmol) in anhydrous MeOH (3 mL) was added NaOMe (10% in MeOH, 52 mg, 0.097 mmol) and compound 204h (42 mg, 0.108 mmol). After being stirred for 20 minutes, the solvent was removed in vacuo, and the residue was dissolved in DCM (5 mL). The mixture was filtered, and the solvent was removed, and the residue was purified by preparative HPLC to give the compound compound 204 (18 mg, 41%). 1H-NMR (400 MHz CD3OD): δ7.90-7.98 (m, 3H), 7.60-7.75 (m, 3H), 7.35 (m, 1H), 7.25-7.27 (m, 2H), 7.08-7.10 (m, 2H), 4.73-4.83 (m, 4H), 4.42-4.53 (m, 1H), 3.82-3.94 (m, 1H), 3.21-3.40 (m, 3H), 2.52-2.78 (m, 1H), 2.29-2.31 (m, 1H); ESI MS: m/z 453 [M+H]+.
To a solution of methyltriphenylphosphonium iodide (250 g, 0.615 mol) in anhydrous THF (1500 mL) was cooled to −100° C. n-BuLi (220 mL, 0.55 mol, 2.5 M in hexane) was added dropwise at this temperature under nitrogen atmosphere, and the mixture was stirred at −100° C. for 1 hour. Compound 349a (50 g, 0.343 mol) was added dropwise at −100° C., and the mixture was warmed to room temperature, and stirred at this temperature for 3 hours. The reaction was quenched with water, and extracted with EtOAc (×500 mL). The organic layer was dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by column chromatography (petroleum ether/EtOAc=100:1) to give the compound 349b (36.5 g, 74%) as a colorless liquid. 1H MNR (CDCl3, 400 MHz): δ7.55 (d, 1H), 7.05 (m, 3H), 5.37 (s, 1H), 4.85 (s, 1H), 2.48 (t, 2H), 2.44 (t, 2H). 1.78 (t, 2H),
To a solution of 1-methylene-1,2,3,4-tetrahydronaphthalene (10 g, 61.0 mol) in a mixture of acetone (100 mL) and water (25 mL) was added NH4OAc (0.47 g, 0.61 mmol) and NBS (15.1 g, 67.1 mmol). The mixture was stirred at room temperature for 30 minutes, concentrated in vacuo, and extracted with EtOAc (3×100 mL). The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo, the residue was purified by column chromatography (petroleum ether/EtOAc=5:1) to give the compound 349c (10 g, 68%) as a colorless liquid. 1H-MNR(CDCl3, 400 MHz): δ7.45 (d, 1H), 7.15 (m, 2H), 7.07 (m, 1H), 3.65 (m, 2H), 2.81 (m, 2H), 2.36 (m, 1H), 1.84 (m, 2H), 1.64 (m, 1H)
To a solution of diethylzinc (25 mL, 23.1 mmol) in dry CH2CL2 (50 mL) was added diiodomethane (6.19 g, 23.1 mmol) at 0° C. under nitrogen. The mixture was stirred at 0° C. for 20 minutes, and followed by the addition of the solution of compound 349c (10 g, 38.5 mmol) in dried CH2CL2 (33 mL). The mixture was stirred at room temperature for 4 hours, and concentrated NH4Cl aqueous solution (30 mL) was added. The organic layer was washed with water, and dried over Na2SO4, filtered, and concentrated in vacuo, the residue was purified by column chromatography (petroleum ether/EtOAc=30:1˜5:1) to give compound 349d (4.4 g, 71%) as a colorless liquid. 1H-NNR (CDCl3, 400 MHz): δ7.17 (m, 4H), 3.72 (s, 2H), 2.95 (t, 2H), 2.00 (m, 2H), 2.58 (t, 2H).
To a solution of 8,9-dihydro-5H-benzo[7]annulen-6(7H)-one (0.898 g, 5.61 mmol) in dried MeOH (5 mL) was added 1-(5-bromo-2-hydroxyphenyl)ethanone (1 g, 4.67 mmol) and pyrrolidine (0.6 mL). The mixture was stirred at room temperature for 1 hour, and refluxed overnight. The mixture was concentrated in vacuo, the residue was purified by column chromatography (petroleum ether/EtOAc=30:1˜5:1) to give the compound 349e (341 mg, 20%) as an orange solid. 1H MNR (CDCl3, 400 MHz): δ8.01 (d, 1H), 7.51 (m, 1H), 7.17 (m, 3H), 6.81 (m, 1H), 6.72 (m, 1H), 3.32 (m, 1H), 3.10 (m, 1H), 2.65 (m, 2H), 2.63 (m, 2H), 2.12 (m, 2H), 1.95 (m, 1H), 1.55 (m, 1H).
To a solution of compound 349e (2 g, 5.62 mmol) in dry CH2Cl2 (140 mL) was added TiCl4 (16.8 mL, 16.8 mmol, 1 M in CH2Cl2) at 15° C. under N2 atmosphere. The mixture was stirred at 15° C. for 1 hour. and added N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (2.77 mL, 12.36 mmol). The mixture was stirred at 15° C. overnight, poured into ice, and extracted with CH2Cl2 (3×100 mL). The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo, to give the crude compound 349f (1.9 g, 90%) as a yellow solid, which was used for the next step directly without purification.
To a solution of N-methylhydroxylamine hydrochloride (415 mg, 5 mmol) in dry MeOH (124 mL) was added MeONa (2.7 mL, 5 mmol, 10% in MeOH) solution and compound 349f (1.9 g, 5 mmol) in portions. The mixture was stirred at 20° C. till the solid was dissolved completely. Water (300 mL) was added, and the mixture was extracted with CH2Cl2 (3×300 mL). The combined organic layers were washed with brine, dried over Na2SO4 and concentrated in vacuo, the residue was purified by column chromatography (CH2Cl2/MeOH=50:1) to give the compound 349 (1.03 g, 48%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ7.42 (d, J=3.2 Hz, 1H), 7.04 (m, 4H), 6.53 (m, 1H), 3.35 (m, 1H), 2.95 (m, 4H), 2.76 (m, 2H), 2.36 (m, 1H), 2.13 (m, 1H), 1.95 (m, 2H), 1.87 (m, 2H); MS: m/z 428 [M+H]+.
An dried flask was charged with compound 191a (20 mg, 0.046 mmol) in 1,4-dioxane (1 mL), Cs2CO3 solution (2 N, 0.5 mL), and 3-chloro-5-cyanophenyl-boronic acid (12.7 mg, 0.07 mmol) sequentially. Pd(PPh3)2Cl2 (5 mg) was added under nitrogen atmosphere, and the mixture was heated at 120° C. in microwave for 10 minutes. The reaction mixture was concentrated in vacuo, and the residue was purified by preparative TLC and HPLC to give compound 191 (2 mg, 8%) as a white solid. 1H NMR (CD3OD 400 MHz): δ7.73-8.35 (m, 5H), 6.89-7.35 (m, 5H), 3.30-3.56 (m, 3H), 2.85-2.96 (m, 4H), 2.81 (s, 1H), 2.40-2.49 (m, 1H), 1.93-2.21 (m, 3H), 1.49-1.70 (m, 1H); ESI MS: m/z 485 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 186 (2.41 mg, 11%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ7.95 (m, 1H), 7.81 (m, 1H), 7.68 (m, 2H), 7.48 (m, 1H), 7.09 (m, 3H), 6.86 (m, 2H), 3.45 (m, 1H), 3.32 (m, 3H), 3.12 (m, 1H), 2.47-2.93 (m, 3H), 2.36 (m, 1H), 2.12 (m, 1H), 1.87 (m, 2H), 1.35-1.64 (m, 1H); ESI MS: m/z 469 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 227 (1.90 mg, 8%) was obtained as a white solid. 1H-NMR (400 MHz
CD3OD): δ8.80-8.30 (m, 1H), 7.68 (m, 1H), 7.48 (m, 1H), 7.33 (m, 1H) 7.14 (m, 4H), 7.03 (m, 1H), 6.86 (m, 1H), 3.51 (m, 1H), 3.48 (m, 3H), 3.15 (m, 1H), 2.72-3.02 (m, 3H), 2.33-2.52 (m, 1H) 2.08-2.25 (m, 1H), 1.41-1.74 (m, 1H); ESI MS: m/z 478 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 189 (2.3 mg, 11%) was obtained as a white solid. 1H NMR (CD3OD 400 MHz): δ7.76 (m, 1H), 7.53 (m, 2H), 7.41 (m, 1H), 7.28 (m, 2H), 7.02 (m, 3H), 6.71-6.95 (m, 2H), 3.41 (m, 1H), 3.28 (s, 3H), 3.02 (m, 1H), 2.51-2.85 (m, 3H), 2.33 (m, 1H), 2.08 (m, 1H), 1.85 (m, 2H), 1.31-1.63 (m, 1H); ESI MS: m/z 460 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 192 (2.64 mg, 12%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ7.70-8.20 (m, 1H), 7.66 (m, 1H), 7.58 (m, 1H), 7.48 (m, 1H), 7.22 (m, 1H) 7.09 (m, 3H), 6.86 (m, 2H), 3.46 (m, 1H), 3.37 (m, 3H), 3.08 (m, 1H), 2.71-2.93 (m, 3H), 2.41 (m, 1H), 2.12 (m, 1H), 1.80-2.03 (m, 2H), 1.38-1.70 (m, 1H); ESI MS: m/z 478 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 199 (2.45 mg, 12%) was obtained as a white solid. 1H-NMR (400 MHz, CD3OD): δ7.95 (m, 3H), 7.61 (s, 1H), 7.36 (m, 1H), 7.2 (s, 3H), 6.95 (m, 1H), 6.85 (m, 1H), 3.44 (d, 1H), 3.30 (m, 3H), 3.08 (m, 1H), 2.65 (m, 3H), 2.41 (m, 1H), 2.13 (s, 1H), 1.91 (s, 2H), 1.55 (m, 1H); ESI MS: m/z 469 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 178 (1.84 mg, 10%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ8.35 (m, 2H), 8.11 (m, 2H), 7.75 (d, 1H) 7.20 (m, 2H), 7.0 (s, 1H), 6.95 (m, 1H), 6.85 (m, 1H), 3.44 (d, 1H), 3.30 (m, 3H), 3.08 (m, 1H), 2.65 (m, 3H), 2.41 (m, 1H), 2.13 (s, 1H), 1.91 (s, 2H), 1.55 (m, 1H); ESI MS: m/z 476 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 234 (2.71 mg, 12%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ7.78-8.31 (m, 1H), 7.64 (m, 1H), 7.18 (m, 4H), 6.88 (m, 4H), 3.88 (m, 3H), 3.52 (m, 1H), 3.37 (m, 3H), 3.15 (m, 1H), 2.91 (m, 3H), 2.44 (m, 1H), 2.22 (m, 1H), 2.01 (m, 2H), 1.48-1.76 (m, 1H); ESI MS: m/z 460 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 242 (2.63 mg, 11%) was obtained, 1H-NMR (400 MHz CD3OD): δ7.86-8.27 (m, 1H), 7.62 (m, 3H), 7.38 (m, 1H), 6.76-7.18 (m, 5H), 3.42 (m, 1H), 3.27 (m, 3H), 3.02 (m, 1H), 2.77 (m, 3H), 2.35 (m, 1H), 2.12 (m, 1H), 1.86 (m, 2H), 1.31-1.62 (m, 1H); ESI MS: m/z 490 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 181 (5 mg, 10%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ8.64 (m, 1H), 8.40 (m, 1H), 7.98 (m, 1H), 7.62 (m, 1H), 7.48 (m, 2H), 6.83-7.08 (m, 4H), 6.7-6.83 (m, 1H), 3.32 (m, 2H), 3.06 (m, 1H), 2.92 (s, 3H), 2.82 (m, 2H), 2.7 (m, 1H), 1.57-2.1 (m, 3H), 1.53 (m, 1H); MS: m/z 427 [M+H]+.
By using the same synthetic procedure as compound 191 described in Example 308, compound 352 (5 mg, 11%) was obtained as a white solid. 1H-NMR (400 MHz
CD3OD): δ7.9 (m, 1H), 7.82 (m, 1H), 7.71 (m, 1H), 7.61 (m, 1H), 7.3 (m, 2H), 7.28 (m, 4H), 7.0 (m, 1H), 6.48 (m, 1H), 3.56 (m, 2H), 3.39 (s, 3H), 3.27 (m, 1H), 2.95 (m, 3H), 2.5-2.8 (m, 1H), 2.39 (m, 1H), 2.01 (m, 2H); MS: m/z 465 [M+H]+.
The solution of methyltriphenylphosphonium iodide (250 g, 0.615 mol) in anhydrous THF (1500 mL) was added n-BuLi (220 mL, 0.55 mol, 2.5 M in hexane) dropwise at −10° C. under nitrogen. The mixture was stirred at −10° C. for 1 hour, compound 381a (50 g, 0.343 mol) was added, and the mixture was warmed to room temperature, and stirred for 3 hours. The reaction was quenched with water, and extracted with EtOAc (×500 mL). The organic layer was dried over Na2SO4, filtered, and concentrated in vacuo, the residue was purified by column chromatography (petroleum ether/EtOAc=100:1) to give the compound 381b (36.5 g, 74%) as a colorless liquid. 1H-MNR (CDCl3, 400 MHz): δ7.55 (d, 1H), 7.05 (m, 3H), 5.37 (s, 1H), 4.85 (s, 1H), 2.48 (t, 2H), 2.44 (t, 2H). 1.78 (t, 2H).
To a solution of 1-methylene-1,2,3,4-tetrahydronaphthalene (10 g, 61.0 mol) in a mixture of acetone (100 mL) and water (25 mL) was added NH4OAc (0.47 g, 0.61 mmol) and NBS (15.1 g, 67.1 mmol). The mixture was stirred at room temperature for 30 minutes, concentrated in vacuo, and extracted with EtOAc (3×100 mL). The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by column chromatography (petroleum ether/EtOAc=5:1) to give the compound 381c (10 g, 68%) as a colorless liquid. 1H-MNR (CDCl3, 400 MHz): δ7.45 (d, 1H), 7.15 (m, 2H), 7.07 (m, 1H), 3.65 (m, 2H), 2.81 (m, 2H), 2.36 (m, 1H), 1.84 (m, 2H), 1.64 (m, 1H).
To a solution of diethylzinc (25 mL, 23.1 mmol) in dried CH2CL2 (50 mL) was added diiodomethane (6.19 g, 23.1 mmol) at 0° C. under nitrogen. The mixture was stirred at 0° C. for 20 minutes, and the solution of compound 381c (10 g, 38.5 mmol) in dry CH2CL2 (33 mL) was added. The ice bath was removed, after the mixture was stirred at room temperature for 4 hours, the concentrated NH4Cl solution (30 mL) was added. The organic layer was washed with water, and dried over Na2SO4, filtered, and concentrated in vacuo, the residue was purified by column chromatography (petroleum ether/EtOAc=30:1˜5:1) to give compound 381d (4.4 g, 71%) as a colorless liquid. 1H-MNR (CDCl3, 400 MHz): δ7.17 (m, 4H), 3.72 (s, 2H), 2.95 (t, 2H), 2.00 (m, 2H), 2.58 (t, 2H).
To a solution of 8,9-dihydro-5H-benzo[7]annulen-6(7H)-one (0.898 g, 5.61 mmol) in dry MeOH (5 mL) was added 1-(5-bromo-2-hydroxyphenyl)ethanone (1 g, 4.67 mmol) and pyrrolidine (0.6 mL). The mixture was stirred at room temperature for 1 hour, and refluxed overnight, and concentrated in vacuo. The residue was purified by column chromatography (petroleum ether/EtOAc=30:1˜5:1) to give the compound 381e (341 mg, 20%) as an orange solid. 1H-MNR (CDCl3, 400 MHz): δ8.01 (d, 1H), 7.51 (m, 1H), 7.17 (m, 3H), 6.81 (m, 1H), 6.72 (m, 1H), 3.32 (m, 1H), 3.10 (m, 1H), 2.65 (m, 2H), 2.63 (m, 2H), 2.12 (m, 2H), 1.95 (m, 1H), 1.55 (m, 1H).
A steel slave was charged with a mixture of compound 381e (3 g, 8.1 mmol), KCN (1.053 g, 16.2 mmol), and (NH4)2CO3 (8.532 g, 60.75 mmol). Formamide (30 mL) was added to fill the tube completely. The mixture was heated at 70° C. for 72 hours, at 110° C. for 3 hours, cooled, and poured into ice water. After acidification with concentrated HCl solution (pH=1), the mixture was extracted with EtOAc (50 mL×3), and the combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by column chromatography (CH2Cl2/MeOH=50:1) to give the compound 381f (1.5 g, 43%) as an orange solid. 1H-MNR (CDCl3, 400 MHz): δ7.17 (m, 1H), 6.96 (m, 5H), 6.65 (m, 1H), 3.32 (m, 1H), 3.25-3.05 (m, 2H), 2.83 (m, 1H), 2.73 (m, 2H), 2.22 (m, 1H), 2.12 (m, 1H), 1.75 (m, 2H).
To a solution of compound 381f (1 g, 2.348 mmol) and Lawesson' reagent (948.6 mg, 2.348 mmol) in 1,4-dioxane (22.5 mL) was heated under 120° C. for 35 minutes in a microwave reactor. The mixture was cooled, and concentrated in vacuo. The residue was purified by column chromatography (petroleum ether/EtOAc=20:1) to give the compound 381g (0.5 g, 48%) as an orange solid. 1H-NMR (CDCl3, 400 MHz): δ7.35 (m, 1H), 7.21 (m, 5H), 6.75 (m, 1H), 3.91 (m, 3H), 3.41 (m, 1H), 2.38 (m, 1H), 2.15 (m, 1H), 2.02 (m, 3H), 1.45 (m, 2H).
To a solution of compound 381g (500 mg, 1.311 mmol) in MeOH (30 mL) was added NaOH solution (4.35 mL, 2.601 mmol, 0.6 N, aqueous). The mixture was stirred at room temperature for 5 minutes, added MeI (0.71 mL, 1.31 mmol), and stirred for another 5 minutes. The mixture was stirred in a microwave reactor at 60° C. for 10 minutes, concentrated in vacuo, added water (30 mL), and extracted with EtOAc (30 mL×3). The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified by preparative TLC (petroleum ether/EtOAc=3:1) to give the compound 381h (60 mg, 11%) as a yellow oil. 1H-MNR (CDCl3, 400 MHz): δ7.35 (m, 1H), 7.15 (m, 2H), 7.05 (m, 2H), 6.65-6.82 (m, 2H), 3.62 (m, 1H), 3.15 (s, 3H), 2.83 (m, 3H), 2.62 (s, 3H), 2.11 (m, 3H), 1.94 (m, 2H), 1.66 (m, 1H), 1.51 (m, 1H).
The solution of compound 381h (20 mg, 0.043 mmol) and NH4I (62.64 mg, 0.432 mmol) in a solution of NH3/EtOH (1.72 mL, 5 N) was heated at 120° C. in a CEM tube in microwave reactor for 3 hours. The mixture was concentrated in vacuo, the residue was added CH2Cl2, filtered, and concentrated in vacuo. The residue was purified by preparative
HPLC to give the compound compound 381 (4.37 mg, 23%) as a white solid. 1H-MNR (CD3OD, 400 MHz): δ7.41 (m, 2H), 7.15 (m, 3H), 6.85 (m, 1H), 6.75 (d, 1H), 3.35-3.55 (m, 1H), 3.27 (s, 3H), 3.05 (m, 1H), 2.96 (m, 2H), 2.35 (m, 3H), 1.95 (m, 2H), 1.65 (m, 1H); ESI MS: 440 [M+H]+.
The solution of compound 179a (20 mg, 0.045 mol), 3-cyanophenyl-boronic acid (10 mg, 0.068 mmol), Cs2CO3 solution (0.3 mL, 2M, aqueous), Pd(PPh3)2Cl2 (0.5 mg) in 1,4-dioxane (1 mL) under nitrogen was heated at 120° C. in microwave for 15 minutes. The dark reaction mixture was filtered, and concentrated in vacuo, the residue was purified by preparative TLC (CH2Cl2:MeOH=10:1) and HPLC to give the compound compound 179 (1.3 mg, 6%) as a yellow solid. 1H-NMR (CD3OD, 400 MHz): δ7.88 (s, 1H), 7.78 (d, J=3.0 Hz 1H), 7.60 (d, J=4.0 Hz 1H), 7.53 (m, 2H), 7.37 (s, 1H), 7.05 (m, 2H), 6.97 (m, 1H), 6.83 (m, 2H), 3.33 (m, 1H), 3.17 (s, 3H), 2.99 (m, 1H), 2.25 (m, 2H), 2.46 (m, 1H), 2.38 (s, 2H), 1.98 (m, 1H), 1.86 (m, 1H) 1.55 (m, 1H); ESI MS: 463 [M+H]+.
A dry flask was charged with compound 238a (107 mg, 0.25 mmol), TEA (1 mL) and DEA (0.3 mL) under N2 atmosphere. To this solution was added CuI (2.0 mg, 0.01 mmol), and PdCl2(PPh3)2 (7 mg, 0.01 mmol). The system was degassed, and cyclopropyl acetylene (0.25 mL, excess) was added, and the mixture was heated to 52° C. with stirring. The reaction was evaporated, and the residue was purified by preparative TLC (CH2Cl2: MeOH=10:1) and HPLC to afford compound 238 (17 mg, 16.4%). 1H-NMR (400 MHz CDCl3): δ7.55 (m, 1H), 7.34 (d, J=17.6 Hz, 1H), 7.16 (m, 4H), 6.73 (m, 1H), 3.49 (d, J=13.6 Hz, 1H), 3.30 (d, J=11.6 Hz, 1H), 3.05 (m, 1H), 2.85 (m, 4H), 2.42 (m, 1H), 2.15 (m, 1H), 1.96 (m, 2H), 1.45 (m, 2H), 0.90 (m, 4H); ESI MS: m/z 414 [M+H]+.
A deoxygenated solution of compound 263a (50 mg, 0.12 mmol) in triethylamine (2 mL) was treated with triphenylphosphine (1.2 mg, 4.7 umol), palladium acetate (0.5 mg, 2.3 umol) and copper (I) iodide (0.4 g, 2.3 umol). After 10 minutes, 3,3-dimethyl-1-butyne (0.2 mL) was added via syringe. The reaction was refluxed for 12 hours, and cooled to room temperature. The solution was filtered, and partitioned between diethyl ether (10 mL) and water (10 mL). The organic layer was dried (MgSO4), evaporated, and the resulting crude product was purified by preparative TLC (CH2Cl2/MeOH=10:1) and HPLC to yield compound 263 (1.5 mg, 3%) as a white solid. 1H-NMR (400 MHz CD3OD): δ7.38-7.91 (m, 2H), 7.24 (m, 1H), 7.15 (m, 3H), 6.56-6.81 (m, 1H), 3.41 (m, 1H), 3.15 (s, 3H), 3.02 (m, 1H), 2.91 (m, 1H), 2.62-2.84 (m, 5H), 2.35 (m, 1H), 2.17 (m, 1H), 1.86 (m, 2H), 1.36 (m, 1H), 1.18 (m, 1H), 1.14 (t, J=7.2 Hz, 6H); ESI MS: 416 [M+H]+.
By using the same synthetic procedure as compound 238 described in Example 321, compound 308 (5.3 mg, 9%) was obtained as a white solid. 1H-NMR (400 MHz CD3OD): δ7.48-7.92 (m, 1H), 7.21-7.35 (m, 1H), 7.08 (m, 3H), 6.81-6.95 (m, 1H), 6.56-6.70 (m, 1H), 3.21 (d, 3H), 2.73 (m, 3H), 2.32 (m, 1H), 2.06 (m, 1H), 1.87 (m, 2H), 2.35 (m, 1H), 1.31-1.63 (m, 1H), 1.20 (d, J=7.2 Hz, 9H); ESI MS: 430 [M+H]+.
By using the same synthetic procedure as compound 238 described in Example 321, compound 317 (7.4 mg, 14%) was obtained as a white solid. 1H-NMR (CD3OD, 400 MHz): δ7.48-7.92 (m, 1H), 7.21-7.35 (m, 1H), 7.08 (m, 3H), 6.81-6.95 (m, 1H), 6.72 (m, 2H), 3.21 (d, 3H), 2.93 (m, 1H), 2.76 (m, 4H), 2.32 (m, 1H), 2.06 (m, 1H), 1.93 (m, 4H), 1.66 (m, 6H), 1.31 (m, 1H); ESI MS: 442 [M+H]+.
A solution of n-BuLi (88 mL, 2.5M) was added to a solution of PPh3CH3+I− (100 g, 246 mmol) in THF (600 mL) at −10° C. The mixture was cooled to −10° C., and stirred for 1 h. Compound 373a (20 g, 137 mmol) was added, and the mixture was warmed to ambient temperature, and stirred for 3 hours. The resulting mixture was quenched by addition of saturated NH4Cl solution (200 mL), extracted with EtOAc (3×150 mL), washed with brine, dried over Na2SO4, concentrated, and purified by column chromatography (petroleum ether:EA=100:1) to give the compound 373b (13.1 g, 66%) as colorless liquid. 1H-NMR (CDCl3 400 MHz): δ7.25 (m, 1H), 7.12 (m, 1H), 6.72 (m, 1H), 3.8 (s, 3H), 5.45 (s, 1H), 4.95 (s, 1H), 2.48 (m, 2H), 2.25 (m, 2H), 1.89 (m, 2H).
To a suspension of compound 373b (1 g, 5.7 mmol) and NH4OAc (44.3 mg, 0.57 mmol) in acetone (11 mL), was added NBS (1.4 g, 6.27 mmol) and water (3 mL). The mixture was stirred at ambient temperature, concentrated in vacuo, and purified by column chromatography (petroleum ether:EA=50:1) to give the compound 373c (0.5 g, 45%) as yellow liquid. 1H-NMR (CDCl3 400 MHz): δ7.23 (m, 2H), 6.69 (m, 1H), 3.74 (s, 3H), 2.31 (m, 2H), 2.66 (m, 1H), 2.65 (m, 1H), 2.55 (m, 1H), 1.80-1.91 (m, 1H).
To a solution of Et2Zn (0.44 mL, 0.44 mmol, 1 M) in dichloromethane (3 mL) was added diiodo methane (118 mg, 0.44 mmol) at 0° C. under nitrogen atmosphere. After being stirred for 20 minutes, compound 373c (200 mg, 0.737 mmol) was added, and the mixture was warmed to room temperature. After being stirred for 2 h, the reaction mixture was quenched by addition of saturated NH4Cl solution (10 mL), extracted with CH2Cl2 (3×10 mL), washed with brine, dried over Na2SO4, concentrated, and purified on column chromatography (petroleum ether:EA=50:1) to give the compound 373d (86 mg, 61%). 1H-NMR (CDCl3 400 MHz): δ7.13 (m, 1H), 6.73-6.85 (m, 2H), 3.82 (s, 3H), 3.72 (m, 2H), 3.00 (m, 2H), 2.52 (m, 2H), 1.95 (m, 2H).
The mixture of compound 373d (3.8 g, 20.0 mmol), 1-(5-Bromo-2-hydroxy-phenyl)-ethanone (3.56 g, 16.7 mmol) and pyrrolidine (5 mL) in MeOH (20 mL) was stirred at ambient temperature for 1 h and at refluxing overnight. The solvent was removed in vacuo, and the crude product was purified by silica column chromatography (petroleum ether:EA=10:1) to give the compound 373e as a yellow solid (3 g, 50%). 1H-NMR (CDCl3 400 MHz): δ7.98 (s, 1H), 7.53 (d, 1H), 7.03 (t, 1H), 6.75 (t, 2H), 6.48 (d, J=7.6 Hz, 1H), 3.82 (s, 3H), 3.02-3.42 (m, 3H), 2.47-2.71 (m, 3H), 2.13 (m, 2H), 1.88 (m, 1H), 1.48 (m, 1H),
To a solution of compound 373e (200 mg, 0.51 mmol) in CH2Cl2 (15 mL) was added TiCl4 solution (1 M in CH2Cl2, 1.02 mL, 1.02 mmol). The mixture was stirred in microwave at 50° C. for 10 minutes. After being cooled to room temperature, N,N′-methanediylidenebis(1,1,1-trimethyl silanamine) (189.4 mg, 1.02 mmol) was added. The mixture was stirred at 60° C. for 10 minutes, poured into ice-water, extracted with CH2Cl2 (2×50 mL). The combined organic layer was washed with brine (100 mL), dried, and concentrated to give the compound 373f (168 mg, 100%) as a yellow solid, which was used for the next step directly without purification. 1H-NMR (CDCl3 400 MHz): δ8.14 (s, 1H), 7.58 (d, J=2.4 Hz, 1H), 7.03 (t, 1H), 6.78 (m, 2H), 6.40 (d, J=7.2 Hz, 1H), 3.82 (s, 3H), 3.23 (m, 2H), 3.02 (m, 2H), 2.50-2.70 (m, 2H), 2.13 (m, 2H), 1.95 (m, 1H), 1.28 (m, 1H).
To a solution of methylhydroxylamine HCl salt (32.8 mg, 0.4 mmol) in anhydrous
MeOH (12 mL) was added NaOMe (10% in MeOH, 20 drops) and compound 373f (168 mg, 0.4 mmol). After being stirred for 10 minutes, the solvent was removed in vacuum, and the residue was dissolved in CH2Cl2 (25 mL). The mixture was filtered, concentrated, and purified by preparative HPLC to give compound 373 as a yellow solid (27 mg, 14%). 1H-NMR (CDCl3 400 MHz): δ7.58 (d, J=2.4 Hz, 1H), 7.03 (m, 2H), 6.78 (m, 3H), 3.82 (s, 3H), 3.45 (m, 1H), 3.32 (m, 1H), 1.85 (m, 2H), 2.91-3.12 (m, 4H), 2.45-2.55 (m, 2H), 2.35 (m, 1H), 2.27 (m, 1H), 2.13 (m, 1H), 2.05 (m, 1H); ESI MS: 458 [M+H]+
A mixture of compound 225a (27 mg, 0.06 mmol), 3-cyanophenylboronic acid (14 mg, 0.09 mmol), Cs2CO3 solution (2 M, 0.3 mL), and Pd(PPh3)2Cl2 (1 mg) in 1,4-dioxane (1 mL) was stirred at 100° C. under N2 for 45 minutes. The reaction mixture was concentrated in vacuum and purified by preparative TLC (CH2Cl2: MeOH=10:1) and HPLC to give compound 225 as a white solid (0.3 mg, 25%). 1H-NMR (CD3OD, 400 MHz): δ8.04 (m, 3H), 7.03 (m, 3H), 7.71 (m, 2H), 6.52 (m, 1H), 3.8 (m, 3H), 3.40 (m, 2H), 3.28 (m, 1H), 3.13 (m, 2H), 2.85 (m, 1H), 2.4-2.60 (m, 1H), 2.23 (m, 1H), 1.95 (m, 2H), 1.51 (m, 3H).
To a solution of P+Ph3CH2OMeCl− (50 g, 145 mmol) in THF (200 mL) was added t-BuOK (16.2 g, 145 mmol) in THF (200 mL) under N2 at −20° C., and the reaction mixture was stirred for 80 min. The solution of compound 399a (12.65 g, 96.6 mmol) in THF (100 mL) at −20° C. was added, and the reaction mixture was stirred at −20° C. for 90 min and at room temperature overnight. The reaction mixture was quenched by water (150 mL), and extracted with EtOAc (3×100 mL). The combined organic layers were dried by Na2SO4 concentrated, and purified by column chromatography (petroleum ether:EA=20:1) to afford the compound 399b as yellow liquid (3 g, 19.6%). 1H-NMR (CDCl3, 400 MHz): δ7.87-7.91 (m, 1H), 7.40-7.58 (m, 1H), 7.23-7.27 (m, 1H), 6.99-7.18 (m, 1H), 6.15-6.17 (d, 1H), 5.66-5.70 (d, 1H), 3.84 (s, 3H).
To a solution of compound 399b (2.44 g, 15.32 mmol) in acetone (20 mL) was added HCl (1N, 10 mL) under N2. The mixture was refluxed for 80 min, and concentrated in vacuo. The aqueous layer was extracted with EtOAc (3×25 mL), and the combined organic layers were washed with brine (2×30 mL). The organic layer was dried over Na2SO4 and concentrated to give the compound 399c as yellow liquid, which was used for the next step directly without further purification (2 g, 88%). 1H-NMR (CDCl3, 400 MHz): δ9.80 (s, 1H), 7.62-7.63 (d, 1H), 7.27-7.60 (m, 3H), 3.80 (d, 2H).
To a solution of chroman-4-one (1.23 g, 8.28 mmol) in THF (20 mL) was added n-BuLi (3.3 mL, 8.28 mmol) at −78° C. under nitrogen atmosphere. The resulting mixture was stirred at this temperature for 1 hour, after addition of the solution of compound 399c (1.2 g, 8.28 mmol) in THF (10 mL), the mixture was stirred for another 1.5 hours at −78° C., quenched by saturate NH4Cl solution (5 mL), and extracted with EtOAc (3×20 mL). The combine organic layers were washed by brine, dried over Na2SO4 and concentrated. The crude product was purified by column chromatography (petroleum ether:EA=20:1) to afford the compound 399d as a white solid (2 g, 83%). 1H-NMR (CDCl3, 400 MHz): δ7.81-7.84 (m, 1H), 7.32-7.54 (m, 5H), 6.90-6.99 (m, 2H), 4.38-4.60 (m, 3H), 2.78-2.89 (m, 3H).
To a solution of compound 399d (50 mg, 0.17 mmol) in toluene (3 mL) was added p-TsOH (3.2 mg, 0.017 mmol) under nitrogen atmosphere. The mixture was heated at 120° C. for 1 hour, and the solvent was evaporated. The residue was purified by preparative TLC (petroleum ether: EtOAc=5:1) to afford the compound 399e as a white solid (10 mg, 21.3%). 1H-NMR (CDCl3, 400 MHz): δ7.95-7.97 (m, 1H), 7.42-7.95 (m, 5H), 7.05-7.10 (m, 2H), 6.65 (d, 1H), 6.41-6.44 (m, 2H), 4.65-4.69 (m, 1H), 4.51-4.55 (m, 1H), 3.63-3.66 (m, 1H).
To a stirred solution of compound 399e (220 mg, 0.81 mmol) in MeOH (20 mL) was added 10% palladium on carbon, and the resulting suspension was stirred under H2 balloon at room temperature for 3 hours. The catalyst was filtrated through a pad of celite, and the filtrate was evaporated. The crude product was purified by preparative TLC (petroleum ether: EtOAc=5:1) to give the compound 399f (50 mg, 23%) as a white solid. 1H-NMR (CDCl3, 400 MHz): δ7.80-7.83 (m, 1H), 7.31-7.44 (m, 5H), 6.87-7.19 (m, 2H), 4.43-4.47 (m, 1H), 4.19-4.24 (m, 1H), 2.57-2.60 (m, 3H), 2.11-2.18 (m, 1H), 1.59-1.77 (m, 1H).
To a solution of compound 399f (100 mg, 0.36 mmol) in dry CH2Cl2 (5 mL) was added TiCl4 (1 M solution in CH2Cl2, 0.72 mmol) dropwise within 15 minutes. The mixture was stirred for another 1 h, bis-trimehtlysilylcarbodiimide (202 mg, 1.08 mmol) was added dropwise, and the mixture was stirred for 18 h. The reaction mixture was poured into ice-water (10 g), and extracted with CH2Cl2. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated to give the compound 399g (60 mg, crude), which was used for the next step directly without further purification.
To a solution of MeNHOH.HCl (16 mg, 0.20 mmol) in anhydrous MeOH (3 mL) was added NaOMe (25% in MeOH, 0.20 mmol) and compound 399g (60 mg, 0.20 mmol). After being stirred for 5 minutes, the solvent was removed in vacuum. The residue was dissolved in CH2Cl2 and filtered. The filtrate was concentrated, and the residue was purified by preparative TLC and HPLC to give compound 399 as a white solid. 1H-NMR (CD3OD, 400 MHz): δ7.34-7.53 (m, 5H), 7.26-7.30 (m, 1H), 6.95-6.97 (m, 1H), 6.78-6.93 (m, 1H), 4.07-4.33 (m, 2H), 2.88 (s, 3H), 2.83-2.88 (m, 1H), 2.67-2.71 (m, 1H), 2.32-2.36 (m, 1H), 1.53-1.67 (m, 2H); ESI MS: 349 [M+H]+.
Grignard reagent was prepared from Mg (0.56 g, 23 mmol) and compound 415a (4 g, 25.6 mmol) in THF (10 mL) in the presence of I2 and a catalytic amount of CuBr (0.16 g, 1.1 mmol). The solution of compound 415a (2 g, 20.8 mmol) in THF (5 mL) was added dropwise at 0° C. After being stirred at room temperature (18° C.) for 3 hours, the aqueous HCl solution (1 N) was added, and the mixture was extracted with EA. After drying with anhydrous MgSO4, the solution was concentrated under reduced pressure, the residue was purified by silica gel column chromatography (petroleum ether:EA=20:1) to give the compound 415b (2 g, yield 55%). 1H-NMR (CDCl3 400 MHz): δ7.36 (m, 2H), 7.27 (m, 3H), 3.04 (m, 1H), 2.65-2.39 (m, 2H), 2.18 (m, 1H), 1.85 (m, 1H), 1.31 (m, 1H), 0.96 (m, 3H).
A mixture of compound 415b (2 g, 11.5 mmol), compound 415B (1.2 g, 5.6 mmol), and pyrrolidine (1 mL) in anhydrous MeOH (140 mL) was refluxed overnight. The solvent was removed, the crude product was purified by silica column (petroleum ether:EA=80:1) to give the compound 415c (1.16 g, yield 27%). 1H-NMR (CDCl3, 300
MHz): δ7.89-7.85 (m, 1H), 7.52-7.48 (m, 1H), 7.26-7.11 (m, 5H), 6.9-6.73 (m, 1H), 2.97-2.91 (m, 1H), 2.63-2.5 (m, 2H), 2.22-2.08 (m, 2H), 1.87-1.69 (m, 2H), 1.51-1.43 (m, 2H), 0.85-0.72 (m, 1H).
To a solution of compound 415c (200 mg, 0.535 mmol), compound 415C (102 mg, 0.7 mmol), Cs2CO3 (2 mL) in dioxane (10 mL) was added Pd(PPh3)2Cl2 (50 mg, 0.05 mmol), and the mixture was refluxed overnight. Water was added to quench the reaction, and the mixture was extracted with EA. The organic layer was washed by brine, dried over anhydrous Na2SO4 and evaporated to afford the crude product, which was purified by preparative TLC (petroleum ether:EA=5:1) to give the compound 415d (145 mg, yield 69%). 1H-NMR (CDCl3 400 MHz): δ7.99-7.98 (m, 1H), 7.9-7.85 (m, 1H), 7.67-7.65 (m, 1H), 7.61-7.44 (m, 6H), 7.25 (m, 1H), 7.0 (m, 1H), 2.74 (m, 2H), 2.2-2 (m, 2H), 1.98 (m, 1H), 1.53-1.44 (m, 4H), 1.28 (m, 1H).
To a solution of compound 415d (50 mg, 0.127 mmol) in CH2Cl2 (3 mL) was added TiCl4 (0.635 mL, 0.635 mmol). After being stirred in microwave at 5° C. for 1 hour, compound 415D (0.064 mL, 0.28 mmol) was added, and the resulting mixture was stirred in microwave at 7° C. for 30 minutes. The reaction mixture was poured into ice-water (10 mL), extracted with CH2Cl2 (15 mL×2), dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated to give the compound 415e (93 mg, yield 95%) as yellow oil, which was used directly for the next step without purification.
To a solution of methylhydroxylamine HCl salt (10.08 mg, 0.12 mmol) in anhydrous MeOH (2.5 mL) was added NaOMe (10% in MeOH, 0.061 mL) and compound 415e (50 mg, 0.12 mmol). After being stirred for 20 minutes, the solvent was removed in vacuo, and the residue was dissolved in CH2Cl2 (20 mL). The mixture was filtered, and the solvent was removed, the residue was purified by pre-TLC and HPLC to give the compound 415 (3.20 mg, yield 7%) as a white solid. 1H-NMR (CD3OD 400 MHz): δ8.09 (s, 1H), 7.95-8.03 (m, 3H), 7.72-7.77 (m, 2H), 7.66-7.64 (m, 2H), 7.20-7.32 (m, 2H), 7.15-7.21 (m, 2H), 3.42 (s, 3H), 3.23 (m, 1H), 2.68-2.97 (s, 2H), 2.19-2.23 (m, 2H), 1.95-2.04 (m, 2H), 1.71-1.74 (m, 2H), 1.56-1.73 (m, 2H); ESI MS: m/z 465 [M+H]+.
To a solution of compound 329a (10 g, 46.74 mmol) and compound 329A (11.2 g, 56.08 mmol) in anhydrous toluene (100 mL) was added pyrrolidine (0.7 g, 9.348) under N2 atmosphere. The resulting mixture was stirred for 1 h at room temperature, and refluxed overnight. The solvent was evaporated, and the residue was purified by chromatograph on silica gel (eluted with petroleum ether: EtOAc=8:1) to afford the compound 329b (9.0 g, yield 50%). 1H-NMR (CDCl3 300 MHz): δ7.89 (s, 1H), 7.49 (d, 1H), 6.78 (s, 1H), 3.60-3.91 (m, 2H), 3.01 (m, 2H), 2.64 (m, 2H), 1.79-2.08 (m, 2H), 1.10-1.47 (m, 11H).
To a mixture of compound 329b (17 g, 47.04 mmol), compound 329B (8.2 g, 55.95 mmol) and Cs2CO3 aqueous solution (2 M, 150 mL) in dioxane (200 mL) was added Pd(dppf)2Cl2 (4.2 g, 4.704 mmol) under N2 atmosphere. The mixture was refluxed overnight, water was added to quench the reaction, and the mixture was extracted with EtOAc (100 mL×3). The organic layer was washed by sat.NaCl solution, dried over Na2SO4 and evaporated. The residue was purified by chromatograph silica gel (diluted with EtOAc:petroleum ether=1:30 to 1:3) to afford the compound 329c (15 g, yield 76%)
To a solution of compound 329c (7.5 g, 0.01744 mol) in CH2Cl2 (100 mL) was added TFA (20 mL) at 0° C. The reaction mixture was warmed to room temperature, and stirred overnight. The solvent was evaporated at room temperature to afford the compound 329d (5.0 g, yield 88%), which was used for the next step directly without purification.
To a solution of compound 329d (2 g, 6.289 mmol), and 2-chloropyrimidine (0.9 g, 8.176 mmol) in DMF (30 mL) was added K2CO3 (1.7 g, 12.58 mmol). The mixture was stirred at 5° C. overnight. Water (30 mL) was added to quench the reaction, and the mixture was extracted with EtOAc (×50 mL). The organic layers were washed with brine (20 mL×3), dried over Na2SO4, and evaporated in vacuum. The residue was purified by chromatograph on silica gel (eluting with petroleum ether:EA=8:1) to afford the compound 329e (0.8 g, yield 40%). 1H-NMR (CDCl3 300 MHz): δ8.5 (d, 2H), 8.02 (s, 1H), 7.74 (m, 2H), 7.40-7.62 (m, 3H), 6.70 (d, 1H), 6.39 (t, 1H), 4.41 (d, 1H), 4.07-4.21 (m, 1H), 3.50-3.67 (m, 2H), 2.62-2.89 (m, 2H), 2.04-2.17 (m, 1H), 1.75-1.95 (m, 2H), 1.58 (m, 1H).
To a solution of compound 329e (200 mg, 0.50 mmol) in CH2Cl2 (2 mL) was added TiCl4 (1 M 4.04 mL, 4.0404 mmol). The mixture was stirred for 15 min at 50° C. in microwave. TMSN=C=NTMS (280 mg, 2.02 mmol) was added, and the mixture was stirred for 30 min at 60° C. in microwave. The reaction mixture was poured into ice-water, and extracted with EtOAc (5 mL). The organic layer was dried over Na2SO4 and evaporated to afford the compound 329f (40 mg, yield 19%), which was used for the next step directly without purification.
A solution of compound 329f (40 mg, 0.095 mmol) in dry MeOH (3 mL) was added MeNHOH.HCl (8 mg, 0.095 mmol) and NaOCH3 (25% in MeOH, 0.02 mL). The resulting mixture was stirred for 10 min at room temperature, and concentrated. The residue was dissolved in CH2Cl2 and the solid was filtered off. The filtrate was evaporated, and purified by prep-TLC and pr-HPLC to afford compound 329 (7.3 mg, yield 21%). 1H-NMR (CD3OD 400 MHz): δ8.36 (m, 1H), 8.25 (m, 1H), 8.11 (m, 1H), 8.01 (m, 2H), 7.94 (m, 1H), 7.71 (m, 1H), 7.63 (m, 2H), 7.28-7.42 (m, 1H), 6.47-6.65 (m, 2H), 4.21-4.64 (m, 2H), 3.47-3.60 (m, 1H), 3.40 (s, 3H), 3.10-3.37 (m, 2H), 3.88-3.91 (m, 1H), 1.97-2.27 (m, 5H); ESI MS: m/z 468 [M+H]+.
To a solution of compound 355a (7.5 g, 17.44 mmol) in CH2Cl2 (100 mL) was added TFA (20 mL) at 0° C. The reaction mixture was warmed to room temperature, and stirred overnight. The solvent was evaporated to afford the compound 355b (5.0 g, yield 88%), which was used for the next step directly without purification.
To a solution of compound 355b (1 g, 3.145 mmol), pyridine (14 mL) in CH2Cl2 (30 mL) was added phenylboronic acid (0.96 g, 6.289 mmol), and Cu(OAc)2 (1.16 g, 6.29 mmol). The reaction mixture was stirred at 5° C. overnight. Water (30 mL) was added to quench the reaction, and the mixture was extracted by EtOAc (50 mL). The organic layers were washed with brine (20 mL×3), dried over Na2SO4, and evaporated in vacuum. The residue was purified by chromatograph silica gel (petroleum ether:EA=8:1) to afford the compound 355c (0.5 g, yield 40%). 1H-NMR (CDCl3 400 MHz): δ8.12 (s, 1H), 7.89 (s, 1H), 7.84 (d, 1H), 7.72 (m, 1H), 7.64 (m, 1H), 7.57 (m, 1H), 7.24 (m, 2H), 7.07 (d, 1H), 6.87 (m, 3H), 3.02 (m, 1H), 3.23-3.34 (m, 2H), 3.10-3.20 (m, 1H), 2.02-2.12 (m, 3H), 1.71-1.91 (m, 3H).
To a solution of compound 355c (100 mg, 0.25 mmol) in CH2Cl2 (2 mL) was added TiCl4 (1 M 0.76 mL, 0.76 mmol). The mixture was stirred for 15 min at 50° C. in microwave. TMSN=C=NTMS (106 mg, 0.76 mmol) was added, and the mixture was stirred for 30 min at 60° C. in microwave. The reaction mixture was poured into ice-water, and extracted with EtOAc (5 mL). The organic layer was dried over Na2SO4 and evaporated to afford the compound 355d (20 mg, yield 19%), which was used for the next step directly without purification.
A solution of compound 355d (20 mg, 0.04785 mmol) in dry MeOH was added MeNHOH.HCl (14 mg, 0.04785 mmol), and the solution of NaOCH3 (25% (wt %) in MeOH, 0.02 mL). The mixture was stirred for 10 min at room temperature, and concentrated. The residue was dissovled in CH2Cl2 and the solid was filtered off. The filtrate was evaporated, and purified by TLC and pr-HPLC to afford the compound 355 (7.5 mg, yield: 34%). 1H-NMR (CD3OD 400 MHz): δ8.04 (s, 2H), 7.89 (m, 1H), 7.75 (m, 2H), 7.64 (m, 1H), 7.44 (m, 1H), 7.12-7.26 (m, 2H), 6.78-7.03 (m, 3H), 3.44-3.59 (m, 1H), 3.40 (s, 3H), 3.03-3.30 (m, 5H), 1.78-2.23 (m, 6H); ESI MS: m/z 466 [M+H]+.
The mixture of compound 390a (27.8 g, 139 m mol), compound 390A and pyrrolidine (9.43 g, 132 mmol) in MeOH (150 mL) was stirred at ambient temperature for 1 h, and refluxed overnight. The solvent was removed in vacuo, the residue was purified by column chromatography on silica gel with petroleum ether: EtOAc=20:1 to give the compound 390b (20 g, 72%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ7.82 (s, 1H), 7.47 (d, 1H), 6.82 (d, 1H), 3.61 (m, 4H), 2.61 (s, 2H), 2.32 (m, 4H) 1.5 (s, 9H).
Pd(PPh3)2Cl2 (83 mg, 0.126 mmol) in a 150 mL flask under N2 atmosphere was treated sequentially with compound 390b (5 g, 12.6 mmol) Cs2CO3 (2 N, 23.7 mL), and the solution of 3-cyanophenylboronic acid (2.74 g, 18.7 mmol) in 1,4-dioxane (50 mL), The mixture was refluxed for 1 hour, poured into water, extracted with EtOAc (100 mL×2), washed with brine (200 mL), dried over Na2SO4, and concentrated. The residue was purified by column chromatography on silica gel (petroleum ether:EtOAc=10:1) to give the compound 390c (3 g, 57%) as a yellow solid. 1H-NMR (CDCl3 300 MHz): δ8.0 (m, 1H) 7.73 (m, 2H) 7.63 (m, 1H), 7.56 (m, 1H), 7.47 (m, 1H), 7.0 (d, 1H), 3.82 (m, 2H), 3.21 (s, 2H), 2.70 (s, 2H), 2.01 (m, 2H), 1.63 (m, 2H), 1.39 (s, 9H).
To a solution of compound 390c (2 g, 4.7 mmol) in anhydrous CH2Cl2 (8 mL) was added TFA 2 mL), the mixture was stirred for 2 hours. TLC (petroleum ether:EtOAc=5:1) showed that the reaction was completed, the mixture was neutralized with sat. NaHCO3 solution (50 mL) until no CO2 was evolved. The organic layer was washed with brine (100 mL), and concentrated to give the compound 390d as a yellow solid (1.39 g, 92%), which was used for the next step directly without purification.
A mixture of compound 390d (1 g, 3 mmol), 390B (0.946 g, 7.7 mmol), and Cu(OAc)2 (1.13 g, 6 mmol) in a mixture of CH2Cl2 (20 mL) and pyridine (10 mL) was refluxed overnight. The reaction mixture was poured into water, extracted with CH2Cl2 (50 mL×2), washed with brine (100 mL), dried over Na2SO4, concentrated, and purified by column chromatography on silica gel (petroleum ether: EtOAc=10:1) to give the compound 390e (440 mg, 35%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ8.0 (s, 1H), 7.74 (m, 2H), 7.72 (m, 1H), 7.65 (m, 1H), 7.49 (m, 1H), 7.23 (m, 2H), 7.19 (m, 1H), 6.99 (m, 2H), 6.79 (m, 1H), 3.42 (m, 2H), 3.20 (m, 2H), 2.75 (s, 2H), 2.14 (m, 2H), 1.83 (m, 2H).
To a solution of compound 390e (100 mg, 0.25 mmol) in anhydrous CH2Cl2 (2 mL) was added TiCl4 (0.5 mL) under N2 atmosphere, and the mixture was stirred in microwave at 50° C. for 15 min. TMSN=C=TMS (93 mg, 0.5 mmol) was added, and the mixture was stirred in microwave at 60° C. for 15 min. The mixture was poured into ice-water (5 mL), extracted with CH2Cl2 (20×2), washed with brine (50 mL), dried over Na2SO4 and concentrated to give the compound 390f (74 mg) as a yellow solid, which was used for the next step directly without purification.
To a solution of MeNHOH.HCl (14.8 mg, 0.17 mmol) in MeOH (4 mL) was added MeONa (95 mg, 0.17 mmol, 10% in MeOH) and compound 390f (74 mg, 0.17 mmol), After being stirred for 10 minutes, the reaction was completed based on LCMS, and the solvent was removed in vacuo. The residue was purified by prep-TLC and HPLC to afford compound 390 (12 mg, 15%) as a white solid. 1H-NMR (CD3OD 400 MHz): δ8.05 (m, 2H), 7.95 (m, 1H), 7.82 (m, 1H), 7.76 (m, 1H), 7.69 (m, 1H), 731-7.49 (m, 4H), 7.29 (m, 2H), 3.75 (m, 2H), 3.54 (m, 2H), 3.47 (s, 3H), 2.90 (d, 1H), 2.46 (m, 1H), 2.12-2.42 (m, 4H); ESI MS: m/z 466 [M+H]+.
The mixture of compound 353a (27.8 g, 139 m mol), compound 353A, and pyrrolidine (9.43 g, 132 mmol) in MeOH (150 mL) was stirred at ambient temperature for 1 h, and refluxed overnight. The solvent was removed in vacuo, the residue was purified by column chromatography on silica gel with petroleum ether: EtOAc=20:1 to give the compound 353b (20 g, 72%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ7.82 (s, 1H), 7.47 (d, 1H), 6.82 (d, 1H), 3.61 (m, 4H), 2.61 (s, 2H), 2.32 (m, 4H) 1.5 (s, 9H).
To a solution of compound 353b (10 g, 25.2 mmol) in anhydrous CH2Cl2 (40 mL) was added TFA 10 mL), and the mixture was stirred for 2 hours. TLC (petroleum ether:EtOAc=5:1) showed that the reaction was completed, and the mixture was neutralized with sat. NaHCO3 solution (50 mL) until no CO2 was evolved. The organic layer was washed with brine (100 mL), and concentrated to give the compound 353c as a yellow solid (6 g, 80%), which was used for the next step directly without purification.
To a solution of compound 353c (2 g, 6.7 mmol) in anhydrous DMF (20 mL) was added K2CO3 (1.87 g, 13.4 mmol) and 353B (928 mg, 8.1 mmol). The reaction mixture was stirred overnight, quenched by sat. NH4Cl solution, extracted with EtOAc (100 m×2), washed with brine, dried over Na2SO4, and concentrated to give the compound 353d as a yellow solid (1.1 g, 43%), which was used directly for the next step without purification. 1H-NMR (CDCl3 300 MHz): δ8.57 (m, 1H), 8.30 (m, 1H), 7.91 (m, 1H), 7.52 (m, 1H), 6.87 (d, 1H) 6.44 (m, 1H), 4.44 (m, 2H), 3.39 (m, 2H), 2.77 (s, 2H), 2.04 (d, 2H), 1.64 (m, 2H).
Pd(PPh3)2Cl2 (19.3 mg, 0.029 mmol) in a 100 mL flask under N2 was treated sequentially with compound 353d (1.1 g, 2.9 mmol), Cs2CO3 (2 N, 5.3 mL), and the solution of 3-cyanophenylboronic acid (652 mg, 4.3 mmol) in 1,4-dioxane (26 mL). The mixture was refluxed for at 12° C. for 1 h, poured into water, extracted with EtOAc (100 m×2), washed with brine (100 mL), dried over Na2SO4, and concentrated, and the residue was purified by prep-TLC to give the compound 353e (100 mg, 10%) as a yellow solid. 1H-NMR (CDCl3 400 MHz): δ8.38 (m, 2H), 8.10 (s, 1H), 7.86 (m, 1H), 7.83 (m, 1H), 7.75 (m, 1H), 7.64 (m, 1H), 7.57 (m, 1H), 7.15 (d, 1H), 6.51 (m, 1H), 4.51 (d, 2H), 3.51 (m, 2H), 2.80 (m, 2H), 2.14 (s, 2H), 1.73 (m, 2H).
To a solution of compound 353e (100 mg, 0.25 mmol) in anhydrous CH2Cl2 (2 mL) was added TiCl4 (3.78 mL, 1 M in CH2Cl2) under N2 atmosphere, and the mixture was stirred in microwave at 50° C. for 15 min TMSN=C=TMS (93 mg, 0.5 mmol) was added, and the mixture was stirred in microwave at 60° C. for 15 min, poured into ice-water (5 mL). The aqueous layer was extracted with CH2Cl2 (20 mL×2), the combined organic layers were washed with brine (50 mL), dried over Na2SO4 and concentrated to give the crude compound 353f (74 mg, crude) as a yellow solid, which was used directly for the next step without purification.
To a solution of MeNHOH.HCl (14.8 mg, 0.17 mmol) in MeOH (4 mL) was added
MeONa (95 mg, 0.17 mmol, 10% in MeOH) and compound 353f (74 mg, 0.17 mmol). After being stirred for 10 minutes, the reaction was completed based on by LCMS, the solvent was removed in vacuo, the residue was purified by prep-TLC and prep-HPLC purification to afford compound 353 (10 mg, 12%) as a white solid. 1H-NMR (CDCl3 400 MHz): δ8.25 (m, 2H), 7.68-7.92 (m, 4H), 7.61 (m, 1H), 7.53 (m, 1H), 7.05 (d, 1H), 6.51 (m, 1H), 4.2-4.4 (m, 2H), 3.52 (m, 1H), 3.30 (s, 3H), 2.72 (d, 2H), 2.14 (m, 2H), 1.8 (m, 2H), 1.7 (m, 1H); ESI MS: m/z 468 [M+H]+.
To a solution of compound 383a (2 g, 12.65 mmol), phenol (1.07 g, 11.38 mmol), and PPh3 (3.3 g, 12.65 mmol) in THF (15 mL) at 0° C. was added diethyl azodicarboxylate (2.2 g, 12.65 mmol). The reaction mixture was stirred at room temperature for 48 h, evaporated, and purified by column chromatography on silica gel (petroleum ether/EA=50/1) to compound 383b (1.16 g, 40%) as a solid. 1H-NMR (CDCl3 400 MHz): δ7.33 (m, 2H), 6.93 (m, 3H), 4.45 (s, 1H), 4.00 (m, 3H), 1.95 (m, 5H), 1.66 (m, 2H), 1.33 (s, 1H).
To a solution of compound 383b (1.158 g, 4.9 mmol) in H2O (30 mL) was added a catalytic amount of p-TsOH (93.2 mg), and the mixture was refluxed for 1 h. The solution was extracted with EtOAc (30 mL×3), washed with brine (30 mL), dried over Na2SO4, and concentrated to give the compound 383c (1 g, 89%) as yellow liquid, which was used for the next step without purification. 1H-NMR (CDCl3 400 MHz): δ7.33 (m, 2H), 6.93 (m, 3H), 4.65 (m, 1H), 2.65 (m, 2H), 2.13-2.35 (m, 4H), 2.02 (m, 1H), 1.85 (m, 1H).
The mixture of compound 383c (400 mg, 2.1 mmol), compound 383A (398 mg, 1.7 mmol) and pyrrolidine (1 mL) in MeOH (5 mL) was refluxed overnight. The solvent was removed in vacuo, the residue was purified by TLC (petroleum ether:EA=3:1) to give the compound 383d as a yellow solid (96 mg, 11%). 1H-NMR (CDCl3 400 MHz): δ8.15 (m, 1H), 7.5-7.45 (m, 5H), 7.33 (m, 1H), 7.21 (m, 1H), 6.9 (m, 4H), 4.32 (m, 1H), 2.80 (s, 2H), 2.28 (m, 2H), 1.98 (m, 4H), 1.62 (m, 2H).
To a solution of compound 383d (96 mg, 0.25 mmol) in CH2Cl2 (5 mL) was added TiCl4 (1 M in CH2Cl2, 0.5 mL, 0.5 mmol), and the mixture was stirred in microwave at 50° C. for 10 minutes. After being cooled to room temperature, N,N′-methanediylidenebis(1,1,1-trimethylsilanamine) (92.85 mg, 0.5 mmol) was added. The mixture was stirred in microwave at 60° C. for 10 minutes, and poured into ice-water. The mixture was extracted with CH2Cl2 (2×50 mL), washed with brine (100 mL), dried, and concentrated to give the compound 383e as a yellow solid (61 mg, 60%), which was used for the next step without purification.
To a solution of methylhydroxylamine HCl salt (7 mg, 0.09 mmol) in anhydrous MeOH (4 mL) was added NaOMe (10% in MeOH, 5 drops) and compound 383e (35 mg, 0.09 mmol). After being stirred for 10 minutes, the solvent was removed in vacuum. The residue was dissolved in CH2Cl2 (25 mL). The mixture was filtered, and the solvent was removed, the residue was purified by preparative HPLC to give compound 383 as a yellow solid (2.0 mg, 5%). 1H-NMR (CD3OD 400 MHz): δ7.88 (m, 3H), 7.5-7.7 (m, 3H), 7.18 (m, 2H), 7.03 (m, 1H), 6.82 (m, 3H), 4.30 (m, 1H), 3.53 (m, 1H), 3.28 (s, 3H), 2.63 (d, 1H), 2.55 (s, 2H), 2.10 (m, 1H), 1.95 (m, 2H), 1.78 (m, 2H), 1.56 (m, 1H); ESI MS: m/z 481 [M+H]+.
To a solution of compound 375a (30 g, 192.2 mmol) in anhydrous MeOH (650 mL) at 0° C. was added NaBH4 (13.2 g, 345.96 mmol). The reaction mixture was stirred at room temperature for 1 hour, water was added to quench the reaction. The solvent was removed under reduced pressure. The residue was extracted with ethyl acetate (30 mL×3), washed with brine (30 mL), dried over Na2SO4 and concentrated to afford the compound 375b (30 g, 100%) as colorless liquid, which was used for the next step without purification. 1H-NMR (CDCl3 400 MHz): δ3.73 (m, 4H), 3.62 (s, 1H), 2.75 (s, 1H), 1.6-1.8 (m, 3H), 1.43 (m, 4H).
To a suspension of sodium hydride (1 g, 25.2 mmol) in DMF (20 mL) was added compound 375b (2 g, 12.6 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 1.5 hours, followed by the addition of benzyl bromide (2.37 g, 15.2 mmol). The reaction mixture was stirred at room temperature overnight, quenched with saturated ammonium chloride solution, extracted with ethyl acetate (30 mL×2), washed with brine (30 mL), dried over sodium sulfate, filtered, and concentrated. The residue was purified on column chromatography on silica gel (petroleum ether/EA=20:1) to give the compound 375c (2.7 g, 87%) as colorless liquid. 1H-NMR (CDCl3 300 MHz): δ7.18-7.26 (m, 5H), 4.42 (s, 2H), 3.83 (m, 4H), 3.48 (s, 1H), 1.62-1.9 (m, 6H), 1.43 (m, 2H).
To a solution of compound 375c (2.7 g, 10.9 mmol) in H2O (50 mL) was added a catalytic amount of p-TsOH (207 mg), and the mixture was refluxed for 1 h. The solution was extracted with EtOAc (40 mL×3), and the organic phase was washed with brine (40 mL). The combine organic layers were dried over Na2SO4, the solvent was removed in vacuo to give the compound 375d (1.6 g, 75%) as yellow liquid, which was used for the next step without purification. 1H-NMR (CDCl3 400 MHz): δ7.25-7.4 (m, 5H), 4.65 (s, 1H), 3.85 (m, 1H), 2.62 (m, 2H), 2.22 (m, 2H), 1.95 (m, 2H).
The mixture of compound 375d (5.17 g, 25.3 mmol), compound 375A (4.33 g, 20.3 mmol), and the solution of pyrrolidine (7 mL) in MeOH (30 mL) was refluxed overnight. The solvent was removed in vacuo, and the residue was purified by silica column chromatography (petroleum ether:EA=30:1) to give the compound 375e as a yellow solid (3.5 g, 35%). 1H-NMR (CDCl3 300 MHz): δ7.88 (m, 1H), 7.48 (m, 1H), 7.33 (m, 5H), 6.75 (d, 1H), 4.43 (s, 2H), 3.62 (s, 1H), 2.63 (s, 2H), 1.62-1.88 (m, 8H).
A mixture of compound 375e (500 mg, 1.24 mmol), 3-cyanophenylboronic acid (292.5 mg, 1.87 mmol), Cs2CO3 solution (2 M, 7.5 mL), and Pd(PPh3)2Cl2 (62.5 mg) in 1,4-dioxane (20 mL) was stirred at 100° C. under N2 for 45 minutes. The reaction mixture was concentrated in vacuum. The residue was purified by silica column chromatography (petroleum ether:EA=10:1) to give the compound 375f as a yellow solid (324 mg, 60%). 1H-NMR (CDCl3 400 MHz): δ8.0 (m, 1H), 7.6-7.7 (m, 2H), 7.6 (m, 1H), 7.52 (m, 1H), 7.48 (m, 1H), 7.23 (m, 4H), 7.2 (m, 1H), 6.70 (m, 1H), 4.43 (s, 2H), 3.63 (s, 1H), 2.6 (m, 2H), 1.6-1.9 (m, 8H).
To a solution of compound 375f (100 mg, 0.24 mmol) in CH2Cl2 (3 mL) was added TiCl4 (1 M in CH2Cl2, 0.48 mL, 0.48 mmol), and the mixture was stirred in microwave at 50° C. for 10 minutes. After being cooled to room temperature, N,N-methanediylidenebis(1,1,1-trimethylsilanamine) (89.13 mg, 0.48 mmol) was added, the mixture was stirred at 60° C. for 10 minutes, poured into ice-water, and extracted with CH2CL2 (2×10 mL). The combined organic layer was washed with brine (10 mL), dried, and concentrated to give the compound 375g as a yellow solid (94 mg, 89%).
To a solution of methylhydroxylamine HCl salt (9.25 mg, 0.111 mmol) in anhydrous MeOH (5 mL) was added NaOMe (10% in MeOH, 10 drops) and compound 375g (50 mg, 0.111 mmol). After being stirred for 10 minutes, the solvent was removed, and the residue was dissolved in CH2Cl2 (25 mL). After filtration, the solvent was removed, and the residue was purified by preparative HPLC to give the compound 375 as a yellow solid (2.0 mg, 5%). 1H-NMR (CD3OD 400 MHz): δ7.75-7.95 (m, 3H), 7.6-7.7 (m, 3H), 7.13-7.42 (m, 5H), 6.92-7.1 (m, 1H), 4.45 (s, 2H), 3.63 (m, 1H), 3.45 (m, 3H), 2.55-2.78 (m, 2H), 2.00 (m, 1H), 1.95 (m, 2H), 1.7-2.0 (m, 5H), 1.56 (m, 2H); ESI MS: m/z 495 [M+H]+.
BACE Assay
Inhibitory activity of compounds was assessed by a fluorescence quench assay of BACE activity using commercially available substrate HiLyte Fluor™ 488-Glu-Val-Asn-Leu-Asp-Ala-Glu-Phe-Lys-(QXLT™ 520)-OH (AnaSpec, San Jose, Calif.) and truncated human beta-secretase (residues 1-458, His6-tagged at the C-terminus) expressed in insect cells D. melanogaster S2 using a baculovirus expression system (Mallender et al., Characterization of recombinant, soluble beta-secretase from an insect cell expression system, Mol Pharmacol 59:619-26, 2001). The assay was performed at room temperature in 96-well white opaque Optiplates aque Optiplates (PerkinElmer, Waltham, Mass.) in a total volume of 200 μl of the incubation mixture containing 50 mM sodium acetate buffer, pH 4.5, 0.4 μM FRET substrate, 2.4 nM enzyme, 5% DMSO, and 0.05% Brij-35. The tested compounds were serially diluted in DMSO and pre-incubated with the substrate. The reaction was started by addition of enzyme, and the progress of the reaction was followed by measuring fluorescence with an excitation wavelength of 480 nm and an emission wavelength of 520 nm. Ten measurements were taken every 5-10 mM, and the intensity of fluorescence was regressed against time in order to derive velocities of reaction in all 96 wells. These velocities were used for calculating percent inhibition using an uninhibited control containing 5% DMSO and a fully inhibited control incubations performed in the absence of enzyme. IC50 values were calculated by fitting percent inhibition vs inhibitor concentration into a four-parametric logistic model using XLFit software (IDBS, Guildford, UK).
The in vitro enzyme activity studies were carried out for compounds of the invention and the data is shown below:
Compounds 1-130 and 178-458 have an IC50 for BACE (fluorescence assay) ranging from 1 nM to less than 50 μM.
BACE cell assay
H4 neuroglioma cell line that stably expresses Amyloid Precursor Protein (APP) containing the KM-NL Swedish mutation (H4-APPsw) was generated. For the assay, cells are treated overnight in the presence of inhibitor and the culture media are subjected to ELISA analysis of soluble Amyloid Beta 1-40 (Aβ 1-40).
H4 neuroglioma cell line: ATCC, Cat #HTB-148
Fetal bovine serum (FBS): Hyclone, Cat #SH30070.03)
96-well plate for compound serial dilution in DMSO
96-well deep well plate
96-well Black Polymer BTM β-D-L plate: Nunc, Cat #152037
96-well White polystyrene ½ area optiplate: Corning, Cat #3642
Aβ 1-40 ELISA kit: Covance, Cat # sig38940
Wallac Victor2 Multilabel HTS counter
PerkinElmer Fusion-Alpha FP-HT Multiplate reader
SpectraMax 384 plus plate reader
H4 neuroglioma cell line was cultured in DMEM with 10% FBS and 1% penicillin/streptomycin (Culture Medium) at 37° C., 5% CO2. The culture plate (150 mm) with 50% confluence of H4 cells was transfected with 15 ug plasmid pcDNA3.1/Neo(+) containing a 2310-bp insert of APPsw at Hind3/Xba1 sites. 24 hrs after transfection, the cells were replaced into three new plates (150 mm) in fresh Culture Medium with 250 ug/ml Zeocin. The stably transfected cell colonies were isolated in about 2-3 weeks. The levels of APPsw expression were analyzed by immunoblotting and the production of Aβ 1-40 was detected by ELISA of culture supernatants. The selected clones are maintained in Culture Medium with 250 μg/ml Zeocin and routinely split in 3-4 days to maintain 20-80% confluence.
Split cells. Split H4-APPsw cells in Culture Medium and culture overnight such that cells will be ˜80% confluent next morning.
Create Compound Dilution Plate. After determining the desired final concentration of compound to be tested, create a 500× dilution plate. Add DMSO, but not inhibitor, to each well of Column 1. Use Column 2 for Control Compound (BACE inhibitor IV, EMD Bioscience, Cat #565788) serial dilution starting at 5 mM (final concentration of 2.5 μM). Add compounds of interest at 500× desired final concentration to wells A3-A10. Add DMSO, but not inhibitor, to each well of Columns 11 and 12. Dilute contents of Row A 1:3 in Row B, then continue through Rows C—H.
To create a 2× solution of compound in media, add 996 μL Culture Medium to each well of a 96-well 2 ml deep well plate (Media Plate) in biosafety hood. Add 4 μL 5 mM control compound to Media Plate wells A1-D1 for determination of full inhibition. Add 4 μL from Compound Dilution Plate to corresponding wells of Medium Plate (do not add additional DMSO to wells A1-D1).
Add media to Cell Plate.
With a multichannel pipettor, mix each well of Media Plate several times to insure homogeneity. Add 100 μL of mixture to Black polymer bottom P-D-L plates. Next, place Medium Plate and Cell Plate in the incubator.
Add cells to Cell Plate.
Trypsinize and count H4-APPsw cells. Dilute cells 6×105 cells/ml in Culture Medium and remove Cell Plate from incubator. Vortex cells to homogeneity, then using a multichannel repeating pipettor, add 100 μL cell suspension to Cell Plate, adding cells from Row H to Row A. Place Cell Plate in incubator.
Change media in Cell Plate.
After 5 h, check Cell Plate by microscope to insure cells are attached. In culture hood, remove media from Cell Plate using multichannel repeating pipettor. Add 100 μl Culture Medium to each well. Remove Media Plate from incubator and mix with pipettor as previous. Add 100 μl from each well of Media Plate to corresponding well in Cell Plate. Place Cell Plate in incubator overnight.
Perform ELISA to determine levels of secreted Aβ 1-40.
After 16 h incubation, spin Cell Plate for 8 min at 1200 rpm. The primary reading of Aβ 1-40 levels is done using PerkinElmer AlphaLISA technology. Follow the manufacturer's protocol for performing AlphaLISA in a white ½ area Optiwell plate using Row 12 for peptide standard (1:2 dilutions, starting at 15 ng/ml). Data are acquired using PerkinElmer Fusion-Alpha FP-HT, Alpha protocol (Count Time 0.6 s, Count Time Ratio 30%:70%). To validate IC50 determinations, a second Aβ 1-40 ELISA was performed using a kit from Covance that uses different antibodies to Aβ 1-40 and a different detection method (absorbance at 490 nM) than the PerkinElmer kit.
Remove remaining media from Cell Plate and add 100 μL CellTiter Glo reagent to cells. Incubate 9 min at room temperature and read luminescence counts on Wallac Victor2 Multilabel HTS counter.
Export data from Fusion using Columnar Report format into a separate file for each plate. Upload data into Activity Base using RIA-DOSE-RESPONSE protocol (Version 1). Data from at least eight doses were fitted to a four parameter logistical model using XLfit software to determine potency.
The in vitro cell activity studies were carried out for compounds of the invention and the data is shown below:
This application claims the benefit of U.S. Provisional Application No. 61/189,464, filed on Aug. 19, 2008, and U.S. Provisional Application No. 61/211,750 filed on Apr. 2, 2009. The entire teachings of the above applications are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61189464 | Aug 2008 | US | |
| 61211750 | Apr 2009 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13059879 | May 2011 | US |
| Child | 13867590 | US |
