Patent Application
20240166610
The present application claims the right of the following priorities:
The present disclosure relates to a series of substituted pyridazine phenol derivatives and a preparation method therefor, in particular to a compound of formula (VI) and a pharmaceutically acceptable salt thereof.
NLRP3 inflammasome is a multiprotein complex that plays an important role in the development of innate immunity and inflammation-related diseases. NLRP3 inflammasome is composed of NOD-like receptors (NLRs), apoptosis-associated speck-like protein containing a CARD (ASC), and Caspase-1. NLRP3 may be activated by exogenous pathogens or endogenous risk factors such as mitochondrial reactive oxygen species, oxidized mitochondrial DNA, β-amyloid, or α-synuclein. Activated NLRP3 forms activated NLRP3 inflammasome with ASC and Caspase-1, and further hydrolyzes IL-1β precursor (pro-IL-1β) and IL-18 precursor (pro-IL-18) through Caspase-1 to release active cytokines IL-1 and IL-18. The secretion of these cytokines can lead to pyroptosis. NLRP3 inflammasome plays an important role in various autoimmune diseases, cardiovascular diseases, neurodegenerative diseases, and tumorigenesis (Nature Reviews Drug Discovery, 2018, 17(8): 588-606.).
Currently, there is no drug molecule marketed as NLRP3 inhibitors, and drugs such as OLT-1177, Inzomelid, and IFM-2427 are in the clinical research stage. The development of NLRP3 inhibitors has broad application prospects.
The present disclosure provides a compound of formula (VI) or a pharmaceutically acceptable salt thereof,
The present disclosure provides a compound of formula (VI) or a pharmaceutically acceptable salt thereof,
The present disclosure provides a compound of formula (I) or a pharmaceutically acceptable salt thereof,
The present disclosure provides a compound of formula (I) or a pharmaceutically acceptable salt thereof,
The present disclosure also provides a compound of formula (I) or a pharmaceutically acceptable salt thereof,
The present disclosure also provides a compound of formula (I) or a pharmaceutically acceptable salt thereof,
The present disclosure also provides a compound of formula (I) or a pharmaceutically acceptable salt thereof,
In some embodiments of the present disclosure, the L is selected from the single bond, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R1 is selected from H, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Ra is each independently selected from F, Cl, Br, —CN, and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Ra is selected from H and F, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rb is selected from —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rb is selected from F and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CN, —CH3,
cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclopentenyl, cyclohexenyl, phenyl, and pyridyl, wherein the —CH3,
cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, phenyl, and pyridyl are each independently and optionally substituted by 1, 2, 3, or 4 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from —CN, —CH3,
cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclopentenyl, cyclohexenyl, phenyl, and pyridyl, wherein the —CH3,
cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, phenyl, and pyridyl are each independently and optionally substituted by 1, 2, 3, or 4 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CH3,
phenyl, and pyridyl, wherein the —CH3,
phenyl, and pyridyl are each independently and optionally substituted by 1, 2, or 3 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CH3, phenyl, and pyridyl, wherein the —CH3, phenyl, and pyridyl are each independently and optionally substituted by 1, 2, or 3 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CN, —CH3,
wherein the —CH3,
are each independently and optionally substituted by 1, 2, 3, or 4 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from —CN, —CH3,
wherein the —CH3,
are each independently and optionally substituted by 1, 2, 3, or 4 Ra, and Ra and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CN, —CF3,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CF3,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R2 is selected from H, —CF3,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from C5-6 cycloalkenyl, 5- to 6-membered heterocycloalkenyl, phenyl, and 5- to 6-membered heteroaryl, wherein the C5-6 cycloalkenyl, 5- to 6-membered heterocycloalkenyl, phenyl, and 5- to 6-membered heteroaryl are each independently and optionally substituted by 1, 2, 3, or 4 Rb, and Rb and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
wherein the
are each independently and optionally substituted by 1, 2, 3, or 4 Rb, and Rb and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
wherein the
are each independently and optionally substituted by 1, 2, 3, or 4 Rb, and Rb and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
wherein the
is optionally substituted by 1, 2, 3, or 4 Rb, and Rb and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring A is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the ring B is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R3 is selected from H, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R4 is selected from H and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R4 is selected from H, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R5 is selected from H and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R5 is selected from —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R6 is selected from H and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R6 is selected from H, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R is selected from F, Cl, Br, —OH, —CN, —C(═O)NH2, and —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from F, Cl, Br, —OH, —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, —N(CH3)2, 4- to 6-membered heterocycloalkyl, cyclobutyl, 6-membered heterocycloalkyl-CH2—, cyclopropyl-CH2—, and cyclopropyl-C(═O)—, wherein the —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, —N(CH3)2, 4- to 6-membered heterocycloalkyl, C4-6 cycloalkyl, 6-membered heterocycloalkyl-CH2—, cyclopropyl-CH2—, and cyclopropyl-C(═O)— are each independently and optionally substituted by 1, 2 or 3 R.
In some embodiments of the present disclosure, the Rd is selected from —OH, —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, 4- to 6-membered heterocycloalkyl, cyclobutyl, 6-membered heterocycloalkyl-CH2—, cyclopropyl-CH2—, and cyclopropyl-C(═O)—, wherein the —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, 4- to 6-membered heterocycloalkyl, C4-6 cycloalkyl, 6-membered heterocycloalkyl-CH2—, cyclopropyl-CH2—, and cyclopropyl-C(═O)— are each independently and optionally substituted by 1, 2 or 3 R.
In some embodiments of the present disclosure, the Rd is selected from F, Cl, Br, —OH, —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, —N(CH3)2,
wherein the —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, —N(CH3)2,
are each independently and optionally substituted by 1, 2, or 3 R, and R and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —OH, —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3,
wherein the —CH3, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3,
are each independently and optionally substituted by 1, 2, or 3 R, and R and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from
wherein the —CH3,
are each independently and optionally substituted by 1, 2, or 3 R, and R and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —CH3 and
wherein the —CH3 and
are each independently and optionally substituted by 1, 2, or 3 R, and R and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —CH3, wherein the —CH3 is optionally substituted by 1, 2, or 3 R, and R and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from F, Cl, Br, —OH, —CH3, —CH2C(═O)NH2, —CH2CN, —CH2—CH3, —CH2CF3, —CH(CH3)2, —CH2—CH2—CH3, —N(CH3)2,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —OH, —CH3, —CH2C(═O)NH2, —CH2CN, —CH2—CH3, —CH2CF3, —CH(CH3)2, —CH2—CH2—CH3,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —OH, —CH3, —CH2C(═O)NH2, —CH2CN, —CH2—CH3, —CH2CF3, —CH(CH3)2, —CH2—CH2—CH3,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —CH3, —CH2C(═O)NH2, —CH2CN,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —CH3, —CH2C(═O)NH2, —CH2CN, and
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the Rd is selected from —CH3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from C1-3 alkyl, C5-6 cycloalkyl, and 5- to 10-membered heterocycloalkyl, wherein the C1-3 alkyl, C5-6 cycloalkyl, and 5- to 10-membered heterocycloalkyl are each independently and optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, pyrrolidinyl, tetrahydrofuryl, piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, cyclohexyl, octahydroindolizinyl, and pyridyl, wherein the —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, pyrrolidinyl, tetrahydrofuryl, piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, 1-oxa-8-azaspiro[4.5]decyl, cyclohexyl, octahydroindolizinyl, and pyridyl are each independently and optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, pyrrolidinyl, tetrahydrofuryl, piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, cyclohexyl, octahydroindolizinyl, and pyridyl, wherein the —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3, pyrrolidinyl, tetrahydrofuryl, piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, 1-oxa-8-azaspiro[4.5]decyl, cyclohexyl, octahydroindolizinyl, and pyridyl are each independently and optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H, piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, cyclohexyl, and octahydroindolizinyl, wherein the piperidinyl, quinuclidinyl, 2-oxa-8-azaspiro[4.5]decyl, cyclohexyl, and octahydroindolizinyl are each independently and optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H, piperidinyl, quinuclidinyl, and 2-oxa-8-azaspiro[4.5]decyl, wherein the piperidinyl, quinuclidinyl, and 2-oxa-8-azaspiro[4.5]decyl are each independently and optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H and piperidinyl, wherein the piperidinyl is optionally substituted by 1, 2, or 3 Rd, and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H, —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3,
and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from —CH2—CH3, —CH(CH3)2, —CH2—CH2—CH3,
and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H and
Rd and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H,
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the R7 is selected from H and
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and R1, R3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and R1, R3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and R1, R3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and R1, R3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and R1, R3, and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the structural moiety
is selected from
and other variables are as defined in the present disclosure.
In some embodiments of the present disclosure, the compound has a structure of formula (I) or (VI-1):
In some embodiments of the present disclosure, the compound has a structure of formula (I-1), (I-2), or (I-4):
In some embodiments of the present disclosure, the compound has a structure of formula (I-3):
In some embodiments of the present disclosure, the compound has a structure of formula (I-1A):
In some embodiments of the present disclosure, the compound has a structure of formula (I-1A-1):
The present disclosure also provides a compound of the following formula or a pharmaceutically acceptable salt thereof,
The present disclosure also provides a compound of the following formula or a pharmaceutically acceptable salt thereof,
The present disclosure also provides a use of the compound or the pharmaceutically acceptable salt thereof in the manufacture of a medicament for the treatment of Parkinson's disease.
The present disclosure also provides the following experimental test method for the compound or the pharmaceutically acceptable salt thereof:
I. Experimental Purpose:
The model of Parkinson's disease (PD) is induced by unilateral administration of 6-hydroxydopamine (6-OHDA) in two brain regions of substantia nigra (SN) and striatum (Str) of rats, and the corresponding behavioral tests are carried out (apomorphine-asymmetric rotation test, balance beam test, rotarod test). Some animals may be selected for histological evaluation (tyrosine hydroxylase (TH), microglia (Iba-1) immunofluorescence staining and western blot sampling, and neurotransmitter assay sampling).
II. Experimental Objects and Grouping:
69 SD male rats (180 to 220 g), and the specific administration regimen is shown in Table 1.
III. Experimental Method:
1. Stereotaxic Administration in SN and Str Regions (Unilateral Administration, Right Side)
Note: the front-to-back distance of bregma at AP position (Y axis), the left-to-right distance lateral to the sagittal suture of ML (X axis), and the vertical downward distance of the skull surface at DV position (Z axis)
6-OHDA (20 μg/8 μL) is dissolved in 0.9% normal saline (NS) (containing 0.02% ascorbic acid) at 0.4 μL/min, before and after 10 min, 4 μL is given to SN and Str of each animal; 0.9% NS (containing 0.02% ascorbic acid) is given to Sham group; the details are as follows:
2. Apomorphine—Asymmetric Rotation Test
3. Balance Beam Test
4. Rotarod Test (Muscle Strength Test)
5. Immunofluorescence Staining (TH, Iba-1)
Conclusion: Compared with the 6-hydroxydopamine modeling group, the compounds of the present disclosure have the effect of improving behavioral indicators and increasing the expression of TH in striatum.
Technical Effect
The NLRP3 inhibitor provided in the present disclosure can effectively inhibit the activity of NLRP3 and the activation of downstream caspase-1, thereby inhibiting the maturation and secretion of IL-1β, and has good pharmacokinetic properties, thus can be used for the treatment of diseases associated with abnormal activation of NLRP3 inflammasome.
Unless otherwise specified, the following terms and phrases when used herein have the following meanings. A specific term or phrase should not be considered indefinite or unclear in the absence of a particular definition, but should be understood according to the common meaning. When a trading name appears herein, it is intended to refer to its corresponding commercial product or active ingredient thereof.
The term “pharmaceutically acceptable” is used herein in terms of those compounds, materials, compositions, and/or dosage forms, which are suitable for use in contact with human and animal tissues within the scope of reliable medical judgment, without excessive toxicity, irritation, anaphylactic reaction, or other problems or complications, commensurate with a reasonable benefit/risk ratio.
The term “pharmaceutically acceptable salt” refers to a salt of the compound of the present disclosure that is prepared by reacting the compound having a specific substituent of the present disclosure with a relatively non-toxic acid or base. When the compound of the present disclosure contains a relatively acidic functional group, a base addition salt can be obtained by contacting the compound with a sufficient amount of a base in a pure solution or a suitable inert solvent. The pharmaceutically acceptable base addition salt includes a salt of sodium, potassium, calcium, ammonium, organic amine, magnesium, or similar salts. When the compound of the present disclosure contains a relatively basic functional group, an acid addition salt can be obtained by contacting the compound with a sufficient amount of acid in a pure solution or a suitable inert solvent. Examples of the pharmaceutically acceptable acid addition salt include an inorganic acid salt, wherein the inorganic acid includes, for example, hydrochloric acid, hydrobromic acid, nitric acid, carbonic acid, bicarbonate, phosphoric acid, monohydrogen phosphate, dihydrogen phosphate, sulfuric acid, hydrogen sulfate, hydroiodic acid, phosphorous acid; and an organic acid salt, wherein the organic acid includes, for example, acetic acid, propionic acid, isobutyric acid, maleic acid, malonic acid, benzoic acid, succinic acid, suberic acid, fumaric acid, lactic acid, mandelic acid, phthalic acid, benzenesulfonic acid, p-toluenesulfonic acid, citric acid, tartaric acid, and methanesulfonic acid; and salts of amino acid (such as arginine), and a salt of an organic acid such as glucuronic acid. Certain specific compounds of the present disclosure contain both basic and acidic functional groups, thus can be converted to any base or acid addition salt.
The pharmaceutically acceptable salt of the present disclosure can be prepared from the parent compound that contains an acidic or basic moiety by a conventional chemical method. Generally, such salt can be prepared by reacting the free acid or base form of the compound with a stoichiometric amount of an appropriate base or acid in water or an organic solvent or a mixture thereof.
The compounds of the present disclosure may exist in specific geometric or stereoisomeric forms. The present disclosure contemplates all such compounds, including cis and trans isomers, (−)- and (+)-enantiomers, (R)- and (S)-enantiomers, diastereoisomers, (D)-isomers, (L)-isomers, and racemic and other mixtures thereof, such as enantiomers or diastereomer enriched mixtures, all of which are within the scope of the present disclosure. Additional asymmetric carbon atoms may be present in substituents such as alkyl. All these isomers and their mixtures are encompassed within the scope of the present disclosure.
Unless otherwise specified, the term “enantiomer” or “optical isomer” refers to stereoisomers that are mirror images of each other.
Unless otherwise specified, the term “cis-trans isomer” or “geometric isomer” is caused by the inability to rotate freely of double bonds or single bonds of ring-forming carbon atoms.
Unless otherwise specified, the term “diastereomer” refers to a stereoisomer in which a molecule has two or more chiral centers and the relationship between the molecules is not mirror images.
Unless otherwise specified, “(+)” refers to dextrorotation, “(−)” refers to levorotation, and “(±)” refers to racemic.
Unless otherwise specified, the absolute configuration of a stereogenic center is represented by a wedged solid bond () and a wedged dashed bond (
), and the relative configuration of a stereogenic center is represented by a straight solid bond (
) and a straight dashed bond (
), a wave line (
) is used to represent a wedged solid bond (
) or a wedged dashed bond (
), or the wave line (
) is used to represent a straight solid bond (
) and a straight dashed bond (
).
The compounds of the present disclosure may exist in specific. Unless otherwise specified, the term “tautomer” or “tautomeric form” means that at room temperature, the isomers of different functional groups are in dynamic equilibrium and can be transformed into each other quickly. If tautomers possibly exist (such as in solution), the chemical equilibrium of tautomers can be reached. For example, proton tautomer (also called prototropic tautomer) includes interconversion through proton migration, such as keto-enol isomerization and imine-enamine isomerization. Valence tautomer includes some recombination of bonding electrons for mutual transformation. A specific example of keto-enol tautomerization is the tautomerism between two tautomers of pentane-2,4-dione and 4-hydroxypent-3-en-2-one.
Unless otherwise specified, the terms “enriched in one isomer”, “enriched in isomers”, “enriched in one enantiomer”, or “enriched in enantiomers” refer to the content of one of the isomers or enantiomers is less than 100%, and the content of the isomer or enantiomer is greater than or equal to 60%, or greater than or equal to 70%, or greater than or equal to 80%, or greater than or equal to 90%, or greater than or equal to 95%, or greater than or equal to 96%, or greater than or equal to 97%, or greater than or equal to 98%, or greater than or equal to 99%, or greater than or equal to 99.5%, or greater than or equal to 99.6%, or greater than or equal to 99.7%, or greater than or equal to 99.8%, or greater than or equal to 99.9%.
Unless otherwise specified, the term “isomer excess” or “enantiomeric excess” refers to the difference between the relative percentages of two isomers or two enantiomers. For example, if the content of one isomer or enantiomer is 90%, and the content of the other isomer or enantiomer is 10%, the isomer or enantiomer excess (ee value) is 80%.
Optically active (R)- and (S)-isomer, or D and L isomer can be prepared using chiral synthesis or chiral reagents or other conventional techniques. If one kind of enantiomer of certain compound of the present disclosure is to be obtained, the pure desired enantiomer can be obtained by asymmetric synthesis or derivative action of chiral auxiliary followed by separating the resulting diastereomeric mixture and cleaving the auxiliary group. Alternatively, when the molecule contains a basic functional group (such as amino) or an acidic functional group (such as carboxyl), the compound reacts with an appropriate optically active acid or base to form a salt of the diastereomeric isomer which is then subjected to diastereomeric resolution through the conventional method in the art to obtain the pure enantiomer. In addition, the enantiomer and the diastereoisomer are generally isolated through chromatography which uses a chiral stationary phase and optionally combines with a chemical derivative method (such as carbamate generated from amine).
The compound of the present disclosure may contain an unnatural proportion of atomic isotope at one or more than one atom that constitutes the compound. For example, the compound can be radiolabeled with a radioactive isotope, such as tritium (3H), iodine-125 (125I), or C-14 (14C). For another example, deuterated drugs can be formed by replacing hydrogen with heavy hydrogen, the bond formed by deuterium and carbon is stronger than that of ordinary hydrogen and carbon, compared with non-deuterated drugs, deuterated drugs have the advantages of reduced toxic and side effects, increased drug stability, enhanced efficacy, extended biological half-life of drugs, etc. All isotopic variations of the compound of the present disclosure, whether radioactive or not, are encompassed within the scope of the present disclosure.
The term “optional” or “optionally” means that the subsequently described event or circumstance may, but does not necessarily, occur, and the description includes instances where the event or circumstance occurs and instances where it does not.
The term “substituted” means one or more than one hydrogen atom(s) on a specific atom are substituted with the substituent, including deuterium and hydrogen variables, as long as the valence of the specific atom is normal and the substituted compound is stable. When the substituent is oxygen (i.e., ═O), it means two hydrogen atoms are substituted. Positions on an aromatic ring cannot be substituted with a ketone.
The term “optionally substituted” means an atom can be substituted with a substituent or not, unless otherwise specified, the type and number of the substituent may be arbitrary as long as being chemically achievable.
When any variable (such as R) occurs in the constitution or structure of the compound more than once, the definition of the variable at each occurrence is independent. Thus, for example, if a group is substituted with 0 to 2 R, the group can be optionally substituted with up to two R, wherein the definition of R at each occurrence is independent. Moreover, a combination of the substituent and/or the variant thereof is allowed only when the combination results in a stable compound.
When the number of a linking group is 0, such as —(CRR)0—, it means that the linking group is a single bond.
When one of the variables is selected from a single bond, it means that the two groups linked by the single bond are connected directly. For example, when L in A-L-Z represents a single bond, the structure of A-L-Z is actually A-Z.
When a substituent is vacant, it means that the substituent does not exist, for example, when X is vacant in A-X, the structure of A-X is actually A. When the enumerative substituent does not indicate by which atom it is linked to the group to be substituted, such substituent can be bonded by any atom thereof. For example, when pyridyl acts as a substituent, it can be linked to the group to be substituted by any carbon atom on the pyridine ring.
When the enumerative linking group does not indicate the direction for linking, the direction for linking is arbitrary, for example, the linking group L contained in
is -M-W-, then -M-W- can link ring A and ring B to form
in the direction same as left-to-right reading order, and form
in the direction contrary to left-to-right reading order. A combination of the linking groups, substituents, and/or variables thereof is allowed only when such combination can result in a stable compound.
When the enumerative linking fused ring group does not indicate the linking direction, the linking direction is arbitrary. For example, the fused ring A in
and at this time,
includes two structural moieties,
A combination of the linking groups, substituents, and/or variables thereof is allowed only when such combination can result in a stable compound.
Unless otherwise specified, when a group has one or more than one linkable site, any one or more than one site of the group can be linked to other groups through chemical bonds. When the linking site of the chemical bond is not positioned, and there is an H atom at the linkable site, then the number of H atoms at the site will decrease correspondingly with the number of chemical bonds linking thereto so as to meet the corresponding valence. The chemical bond between the site and other groups can be represented by a straight solid bond () a straight dashed bond (
), or a wavy line (
). For example, the straight solid bond in —OCH3 means that it is linked to other groups through the oxygen atom in the group; the straight dashed bonds in
mean that it is linked to other groups through the two ends of nitrogen atom in the group; the wavy lines in
mean that the phenyl group is linked to other groups through carbon atoms at position 1 and position 2.
means that it can be linked to other groups through any linkable sites on the piperidinyl by one chemical bond, including at least four types of linkage, including
Even though the H atom is drawn on the —N—,
still includes the linkage of
merely when one chemical bond was connected, the H of this site will be reduced by one to the corresponding monovalent piperidinyl.
When the chemical bond of a substituent intersects the chemical bond connecting two atoms in the ring, it means that the substituent may be bonded to any atom on the ring. When the atom to which a substituent is attached is not specified, the substituent may be bonded to any atom. If the atom to which the substituent is attached is in a bicyclic or tricyclic system, it means that the substituent may be bonded to any atom on any ring in the system. A combination of substituents and/or variables thereof is allowed only when such combination can result in a stable compound. For example, the structural moiety
or means that it can be substituted at any position on cyclohexyl or cyclopentyl.
Unless otherwise specified, the number of atoms in a ring is usually defined as the number of ring members, for example, “5- to 7-membered ring” refers to a “ring” in which 5 to 7 atoms are arranged around.
Unless otherwise specified, Cn−n+m or Cn-Cn+m includes any specific case of n to n+m carbons, for example, C1-12 includes C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, and C12, and any range from n to n+m is also included, for example, C1-12 includes C1-3, C1-6, C1-9, C3-6, C3-9, C3-12, C6-9, C6-12, and C9-12, etc.; similarly, n-membered to n+m-membered means that the number of atoms on the ring is from n to n+m, for example, 3- to 12-membered ring includes 3-membered ring, 4-membered ring, 5-membered ring, 6-membered ring, 7-membered ring, 8-membered ring, 9-membered ring, 10-membered ring, 11-membered ring, and 12-membered ring, and any range from n to n+m is also included, for example, 3- to 12-membered ring includes 3- to 6-membered ring, 3- to 9-membered ring, 5- to 6-membered ring, 5- to 7-membered ring, 6- to 7-membered ring, 6- to 8-membered ring, 6- to 10-membered ring, etc.
Unless otherwise specified, the term “C1-3 alkyl” refers to a linear or branched saturated hydrocarbon group consisting of 1 to 3 carbon atoms. The C1-3 alkyl includes C1-2, C2-3 alkyl, etc.; it can be monovalent (such as methyl), divalent (such as methylene), or multivalent (such as methine). Examples of C1-3 alkyl include, but are not limited to, methyl (Me), ethyl (Et), propyl (including n-propyl and isopropyl), etc.
Unless otherwise specified, the term “C1-4 alkyl” refers to a linear or branched saturated hydrocarbon group consisting of 1 to 4 carbon atoms. The C1-4 alkyl includes C1-2, C1-3, and C2-3 alkyl, etc.; it can be monovalent (such as methyl), divalent (such as methylene), or multivalent (such as methine). Examples of C1-4 alkyl include, but are not limited to, methyl (Me), ethyl (Et), propyl (including n-propyl and isopropyl), butyl (including n-butyl, isobutyl, s-butyl, and t-butyl), etc.
Unless otherwise specified, the term “heteroalkyl” by itself or in combination with another term refers to a stable linear or branched chain alkyl atomic group or a combination thereof consisting of a certain number of carbon atoms and at least one heteroatom or group of heteroatoms. In some embodiments, the heteroatom is selected from B, O, N, and S, wherein the nitrogen and sulfur atoms are optionally oxidized, and the nitrogen heteroatom is optionally quaternized. In other embodiments, the group of heteroatoms is selected from —C(═O)O—, —C(═O)—, —C(═S)—, —S(═O), —S(═O)2—, —C(═O)N(H)—, —N(H)—, —C(═NH)—, —S(═O)2N(H)—, and —S(═O)N(H)—. In some embodiments, the heteroalkyl is C1-6 heteroalkyl; in other embodiments, the heteroalkyl is C1-3 heteroalkyl. The heteroatom or group of heteroatoms may be located at any internal position within the heteroalkyl, including the position at which the alkyl is attached to the rest of the molecule, but the terms “alkoxy”, “alkylamino”, and “alkylthio” (or thioalkoxy) are customary expressions referring to those alkyl groups attached to the rest of the molecule via an oxygen, amino, or sulfur atom, respectively. Examples of heteroalkyl include, but are not limited to, —OCH3, —OCH2CH3, —OCH2CH2CH3, —OCH2(CH3)2, —CH2—CH2—O—CH3, —NHCH3, —N(CH3)2, —NHCH2CH3, —N(CH3)(CH2CH3), —CH2—CH2—NH—CH3, —CH2—CH2—N(CH3)—CH3, —SCH3, —SCH2CH3, —SCH2CH2CH3, —SCH2(CH3)2, —CH2—S—CH2—CH3, —CH2—CH2, —S(═O)—CH3, and —CH2—CH2—S(═O)2—CH3. Up to two heteroatoms may be consecutive, such as —CH2—NH—OCH3.
Unless otherwise specified, the term “C1-3 alkoxy” refers to an alkyl group containing 1 to 3 carbon atoms that are connected to the rest of the molecule through an oxygen atom. The C1-3 alkoxy includes C1-2, C2-3, C3, and C2 alkoxy, etc. Examples of C1-3 alkoxy include, but are not limited to, methoxy, ethoxy, propoxy (including n-propoxy and isopropoxy), etc.
Unless otherwise specified, the term “C1-4 alkoxy” refers to an alkyl group containing 1 to 4 carbon atoms that are connected to the rest of the molecule through an oxygen atom. The C1-4 alkoxy includes C1-3, C1-2, C2-4, C4, and C3 alkoxy, etc. Examples of C1-4 alkoxy include, but are not limited to, methoxy, ethoxy, propoxy (including n-propoxy and isopropoxy), butoxy (including n-butoxy, isobutoxy, s-butoxy, and t-butoxy), etc.
Unless otherwise specified, the term “C1-3 alkylamino” refers to an alkyl group containing 1 to 3 carbon atoms attached to the rest of the molecule through an amino group. The C1-3 alkylamino includes C1-2, C3, and C2 alkylamino, etc. Examples of C1-3 alkylamino include, but are not limited to, —NHCH3, —N(CH3)2, —NHCH2CH3, —N(CH3)CH2CH3, —NHCH2CH2CH3, —NHCH2(CH3)2, etc.
Unless otherwise specified, the term “halo” or “halogen” by itself or as part of another substituent refers to fluorine, chlorine, bromine, or iodine atom.
Unless otherwise specified, the term “C1-3 haloalkyl” refers to monohaloalkyl and polyhaloalkyl containing 1 to 3 carbon atoms. The C1-3 haloalkyl includes C1-2, C2-3, C3, C2, and C1 haloalkyl, etc. Examples of C1-3 haloalkyl include, but are not limited to, trifluoromethyl, trichloromethyl, 2,2,2-trifluoroethyl, pentafluoroethyl, pentachloroethyl, 3-bromopropyl, etc.
Unless otherwise specified, “C3-12 cycloalkyl” refers to a saturated cyclic hydrocarbon group consisting of 3 to 12 carbon atoms, including monocyclic, bicyclic, and tricyclic systems, wherein the bicyclic and tricyclic systems include spiro ring, fused ring, and bridged ring. The C3-12 cycloalkyl includes C3-10, C3-8, C3-6, C3-5, C4-10, C4-8, C4-6, C4-5, C5-8, and C5-6 cycloalkyl, etc.; it may be monovalent, divalent, or multivalent. Examples of C3-12 cycloalkyl include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, norbornyl, [2.2.2]dicyclooctyl, [4.4.0]bicyclodecyl, etc.
Unless otherwise specified, “C3-6 cycloalkyl” refers to a saturated cyclic hydrocarbon group consisting of 3 to 6 carbon atoms, which is a monocyclic and bicyclic system, and the C3-6 cycloalkyl includes C3-5, C4-5, and C5-6 cycloalkyl, etc.; it can be monovalent, divalent, or multivalent. Examples of C3-6 cycloalkyl include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.
Unless otherwise specified, “C4-6 cycloalkyl” refers to a saturated cyclic hydrocarbon group composing of 4 to 6 carbon atoms, which is a monocyclic and bicyclic system, and the C4-6 cycloalkyl includes C4-5 and C5-6 cycloalkyl, etc.; it can be monovalent, divalent, or multivalent. Examples of C4-6 cycloalkyl include, but are not limited to, cyclobutyl, cyclopentyl, cyclohexyl, etc.
Unless otherwise specified, “C5-6 cycloalkyl” refers to a saturated cyclic hydrocarbon group consisting of 5 to 6 carbon atoms, which is a monocyclic and bicyclic system, and the C5-6 cycloalkyl includes C5 and C6 cycloalkyl, etc.; it can be monovalent, divalent, or multivalent. Examples of C5-6 cycloalkyl include, but are not limited to, cyclopentyl, cyclohexyl, etc.
Unless otherwise specified, the term “3- to 12-membered heterocycloalkyl” by itself or in combination with other terms refers to a saturated cyclic group consisting of 3 to 12 ring atoms, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(O)p, p is 1 or 2). The 3- to 12-membered heterocycloalkyl includes monocyclic, bicyclic, and tricyclic systems, wherein the bicyclic and tricyclic systems include a spiro ring, a fused ring, and a bridged ring. In addition, with regard to the “3- to 12-membered heterocycloalkyl”, a heteroatom may occupy the connection position of the heterocycloalkyl with the rest of the molecule. The 3- to 12-membered heterocycloalkyl includes 3- to 10-membered, 3- to 8-membered, 3- to 6-membered, 3- to 5-membered, 4- to 6-membered, 5- to 6-membered, 4-membered, 5-membered, and 6-membered heterocycloalkyl, etc. Examples of 3- to 12-membered heterocycloalkyl include, but are not limited to, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, tetrahydrothienyl (including tetrahydrothiophen-2-yl and tetrahydrothiophen-3-yl, etc.), tetrahydrofuranyl (including tetrahydrofuran-2-yl, etc.), tetrahydropyranyl, piperidinyl (including 1-piperidinyl, 2-piperidinyl, and 3-piperidinyl, etc.), piperazinyl (including 1-piperazinyl and 2-piperazinyl, etc.), morpholinyl (including 3-morpholinyl and 4-morpholinyl, etc.), dioxinyl, dithianyl, isoxazolidinyl, isothiazolidinyl, 1,2-oxazinyl, 1,2-thiazinyl, hexahydropyridazinyl, homopiperazinyl, homopiperidinyl, or dioxacycloheptyl, etc.
Unless otherwise specified, the term “5- to 10-membered heterocycloalkyl” by itself or in combination with other terms refers to a saturated cyclic group consisting of 5 to 10 ring atoms, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(O)p, p is 1 or 2). The 5- to 10-membered heterocycloalkyl includes monocyclic, bicyclic, and tricyclic systems, wherein the bicyclic and tricyclic systems include a spiro ring, a fused ring, and a bridged ring. In addition, with regard to the “5- to 10-membered heterocycloalkyl”, a heteroatom may occupy the connection position of the heterocycloalkyl with the rest of the molecule. The 5- to 10-membered heterocycloalkyl includes 5- to 6-membered, 5- to 7-membered, 5- to 8-membered, 5- to 9-membered, 6- to 7-membered, 6- to 8-membered, 6- to 9-membered, 6- to 10-membered, 5-membered, 6-membered, 7-membered, 8-membered, 9-membered, and 10-membered heterocycloalkyl, etc. Examples of 5- to 10-membered heterocycloalkyl include, but are not limited to, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, tetrahydrothienyl (including tetrahydrothiophen-2-yl and tetrahydrothiophen-3-yl, etc.), tetrahydrofuranyl (including tetrahydrofuran-2-yl, etc.), tetrahydropyranyl, piperidinyl (including 1-piperidinyl, 2-piperidinyl and 3-piperidinyl, etc.), piperazinyl (including 1-piperazinyl and 2-piperazinyl, etc.), morpholinyl (including 3-morpholinyl and 4-morpholinyl, etc.), dioxinyl, dithianyl, isoxazolidinyl, isothiazolidinyl, 1,2-oxazinyl, 1,2-thiazinyl, hexahydropyridazinyl, homopiperazinyl, homopiperidinyl, or dioxacycloheptyl, etc.
Unless otherwise specified, the term “3- to 6-membered heterocycloalkyl” by itself or in combination with other terms refers to a saturated cyclic group consisting of 3 to 6 ring atoms, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(O)p, p is 1 or 2). The 3- to 6-membered heterocycloalkyl includes monocyclic and bicyclic systems, wherein the bicyclic systems include a spiro ring, a fused ring, and a bridged ring. In addition, with regard to the “3- to 6-membered heterocycloalkyl”, a heteroatom may occupy the connection position of the heterocycloalkyl with the rest of the molecule. The 3- to 6-membered heterocycloalkyl includes 4- to 6-membered, 5- to 6-membered, 4-membered, 5-membered, and 6-membered heterocycloalkyl, etc. Examples of 3- to 6-membered heterocycloalkyl include, but are not limited to, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, tetrahydrothienyl (including tetrahydrothiophen-2-yl and tetrahydrothiophen-3-yl, etc.), tetrahydrofuranyl (including tetrahydrofuran-2-yl, etc.), tetrahydropyranyl, piperidinyl (including 1-piperidinyl, 2-piperidinyl, and 3-piperidinyl, etc.), piperazinyl (including 1-piperazinyl and 2-piperazinyl, etc.), morpholinyl (including 3-morpholinyl and 4-morpholinyl, etc.), dioxinyl, dithianyl, isoxazolidinyl, isothiazolidinyl, 1,2-oxazinyl, 1,2-thiazinyl, or hexahydropyridazinyl, etc.
Unless otherwise specified, the term “4- to 6-membered heterocycloalkyl” by itself or in combination with other terms refers to a saturated cyclic group consisting of 4 to 6 ring atoms, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(═O)p, p is 1 or 2). The 4- to 6-membered heterocycloalkyl includes monocyclic and bicyclic systems, wherein the bicyclic systems include a spiro ring, a fused ring, and a bridged ring. In addition, with regard to the “4- to 6-membered heterocycloalkyl”, a heteroatom may occupy the connection position of the heterocycloalkyl with the rest of the molecule. The 4- to 6-membered heterocycloalkyl includes 4- to 5-membered, 5- to 6-membered, 4-membered, 5-membered, and 6-membered heterocycloalkyl, etc. Examples of 4- to 6-membered heterocycloalkyl include, but are not limited to, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl, pyrazolidinyl, imidazolidinyl, tetrahydrothienyl (including tetrahydrothiophen-2-yl and tetrahydrothiophen-3-yl, etc.), tetrahydrofuranyl (including tetrahydrofuran-2-yl, etc.), tetrahydropyranyl, piperidinyl (including 1-piperidinyl, 2-piperidinyl, and 3-piperidinyl, etc.), piperazinyl (including 1-piperazinyl and 2-piperazinyl, etc.), morpholinyl (including 3-morpholinyl and 4-morpholinyl, etc.), dioxinyl, dithianyl, isoxazolidinyl, isothiazolidinyl, 1,2-oxazinyl, 1,2-thiazinyl, or hexahydropyridazinyl, etc.
Unless otherwise specified, the term “6-membered heterocycloalkyl” by itself or in combination with other terms refers to a saturated cyclic group consisting of 6 ring atoms, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(═O)p, p is 1 or 2). The 6-membered heterocycloalkyl includes monocyclic and bicyclic systems, wherein the bicyclic systems include a spiro ring, a fused ring, and a bridged ring. In addition, with regard to the “6-membered heterocycloalkyl”, a heteroatom may occupy the connection position of the heterocycloalkyl with the rest of the molecule. Examples of 6-membered heterocycloalkyl include, but are not limited to, tetrahydropyranyl, piperidinyl (including 1-piperidinyl, 2-piperidinyl, and 3-piperidinyl, etc.), piperazinyl (including 1-piperazinyl and 2-piperazinyl, etc.), morpholinyl (including 3-morpholinyl and 4-morpholinyl, etc.), dioxinyl, dithianyl, isoxazolidinyl, isothiazolidinyl, 1,2-oxazinyl, 1,2-thiazinyl, or hexahydropyridazinyl, etc.
Unless otherwise specified, “C3-12 cycloalkenyl” refers to a partially unsaturated cyclic hydrocarbon group consisting of 3 to 12 carbon atoms containing at least one carbon-carbon double bond, including monocyclic, bicyclic, and tricyclic systems, wherein the bicyclic and tricyclic systems include a spiro ring, a fused ring, and a bridged ring, and any ring in this system is non-aromatic. The C3-12 cycloalkenyl includes C3-10, C3-8, C3-6, and C3-5 cycloalkenyl, etc.; it may be monovalent, divalent, or multivalent. Examples of C3-12 cycloalkenyl include, but are not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, etc.
Unless otherwise specified, “C3-6 cycloalkenyl” refers to a partially unsaturated cyclic hydrocarbon group consisting of 3 to 6 carbon atoms containing at least one carbon-carbon double bond, including monocyclic and bicyclic systems, wherein the bicyclic system includes a spiro ring, a fused ring, and a bridged ring, and any ring in this system is non-aromatic. The C3-6 cycloalkenyl includes C4-6, C4-5, or C5-6 cycloalkenyl, etc.; it may be monovalent, divalent, or multivalent. Examples of C3-6 cycloalkenyl include, but are not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, etc.
Unless otherwise specified, “C5-6 cycloalkenyl” refers to a partially unsaturated cyclic hydrocarbon group consisting of 5 to 6 carbon atoms containing at least one carbon-carbon double bond, including monocyclic and bicyclic systems, wherein the bicyclic system includes a spiro ring, a fused ring, and a bridged ring, and any ring in this system is non-aromatic. The C5-6 cycloalkenyl includes C5 or C6 cycloalkenyl, etc.; it may be monovalent, divalent, or multivalent. Examples of C5-6 cycloalkenyl include, but are not limited to, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, etc.
Unless otherwise specified, the term “3- to 12-membered heterocycloalkenyl” by itself or in combination with other terms refers to a partially unsaturated cyclic group consisting of 3 to 12 ring atoms containing at least one carbon-carbon double bond, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(O)p, p is 1 or 2). The 3- to 12-membered heterocycloalkenyl includes monocyclic, bicyclic, and tricyclic systems, wherein the bicyclic and tricyclic systems include a spiro ring, a fused ring, and a bridged ring, and any ring in this system is non-aromatic. In addition, with regard to the “3- to 12-membered heterocycloalkenyl”, a heteroatom may occupy the connection position of the heterocycloalkenyl with the rest of the molecule. The 3- to 12-membered heterocycloalkenyl includes 3- to 10-membered, 3- to 8-membered, 3- to 6-membered, 3- to 5-membered, 4- to 6-membered, 4- to 5-membered, 5- to 6-membered, 4-membered, 5-membered, and 6-membered heterocycloalkenyl, etc. Examples of 3- to 12-membered heterocycloalkenyl include, but are not limited to,
Unless otherwise specified, the term “5- to 6-membered heterocycloalkenyl” by itself or in combination with other terms refers to a partially unsaturated cyclic group consisting of 5 to 6 ring atoms containing at least one carbon-carbon double bond, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms, wherein nitrogen atoms are optionally quaternized, and carbon, nitrogen, and sulfur heteroatoms may be optionally oxidized (i.e., C(═O), NO, and S(O)p, p is 1 or 2). The 5- to 6-membered heterocycloalkenyl includes monocyclic and bicyclic systems, wherein the bicyclic system includes a spiro ring, a fused ring, and a bridged ring, and any ring in this system is non-aromatic. In addition, with regard to the “5- to 6-membered heterocycloalkenyl”, a heteroatom may occupy the connection position of the heterocycloalkenyl with the rest of the molecule. The 5- to 6-membered heterocycloalkenyl includes 5-membered and 6-membered heterocycloalkenyl, etc. Examples of 5- to 6-membered heterocycloalkenyl include, but are not limited to,
Unless otherwise specified, the terms “C6-12 aromatic ring” and “C6-12 aryl” in the present disclosure can be used interchangeably, and the term “C6-12 aromatic ring” or “C6-12 aryl” refers to a cyclic hydrocarbon group consisting of 6 to 12 carbon atoms with a conjugated π-electron system, which may be a monocyclic, fused bicyclic, or fused tricyclic system, in which each ring is aromatic. C6-12 aryl may be monovalent, divalent, or multivalent, and the C6-12 aryl includes C6-10, C6-9, C6-8, C12, C10, and C6 aryl, etc. Examples of C6-12 aryl include, but are not limited to, phenyl, naphthyl (including 1-naphthyl and 2-naphthyl, etc.).
Unless otherwise specified, the terms “5- to 12-membered heteroaromatic ring” and “5- to 12-membered heteroaryl” in the present disclosure can be used interchangeably, and the term “5- to 12-membered heteroaryl” refers to a cyclic group consisting of 5 to 12 ring atoms with a conjugated π-electron system, where 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms. The 5- to 12-membered heteroaryl may be a monocyclic, fused bicyclic, or fused tricyclic system in which each ring is aromatic, and in which the nitrogen atom is optionally quaternized, and the nitrogen and sulfur heteroatoms may be optionally oxidized (i.e., NO and S(O)p, where p is 1 or 2). The 5- to 12-membered heteroaryl may be attached to the rest of the molecule through a heteroatom or a carbon atom. The 5- to 12-membered heteroaryl includes 5- to 10-membered, 5- to 8-membered, 5- to 7-membered, 5- to 6-membered, 5-membered, and 6-membered heteroaryl, etc. Examples of the 5- to 12-membered heteroaryl include, but are not limited to, pyrrolyl (including N-pyrrolyl, 2-pyrrolyl, and 3-pyrrolyl, etc.), pyrazolyl (including 2-pyrazolyl and 3-pyrazolyl, etc.), imidazolyl (including N-imidazolyl, 2-imidazolyl, 4-imidazolyl, and 5-imidazolyl, etc.), oxazolyl (including 2-oxazolyl, 4-oxazolyl, and 5-oxazolyl, etc.), triazolyl (1H-1,2,3-triazolyl, 2H-1,2,3-triazolyl, 1H-1,2,4-triazolyl, and 4H-1,2,4-triazolyl, etc.), tetrazolyl, isoxazolyl (3-isoxazolyl, 4-isoxazolyl, and 5-isoxazolyl, etc.), thiazolyl (including 2-thiazolyl, 4-thiazolyl, and 5-thiazolyl, etc.), furyl (including 2-furyl and 3-furyl, etc.), thienyl (including 2-thienyl and 3-thienyl, etc.), pyridyl (including 2-pyridyl, 3-pyridyl, and 4-pyridyl, etc.), pyrazinyl, pyrimidinyl (including 2-pyrimidinyl and 4-pyrimidinyl, etc.), benzothiazolyl (including 5-benzothiazolyl, etc.), purinyl, benzimidazolyl (including 2-benzimidazolyl, etc.), benzoxazolyl, indolyl (including 5-indolyl, etc.), isoquinolinyl (including 1-isoquinolyl and 5-isoquinolinyl, etc.), quinoxalinyl (including 2-quinoxalinyl and 5-quinoxalinyl, etc.), or quinolinyl (including 3-quinolinyl and 6-quinolinyl, etc.).
Unless otherwise specified, the terms “5- to 6-membered heteroaromatic ring” and “5- to 6-membered heteroaryl” in the present disclosure can be used interchangeably, and the term “5- to 6-membered heteroaryl” refers to a monocyclic group consisting of 5 to 6 ring atoms with a conjugated π-electron system, wherein 1, 2, 3, or 4 ring atoms are heteroatoms independently selected from O, S, and N, and the rest are carbon atoms. Herein, the nitrogen atom is optionally quaternized, the nitrogen and sulfur heteroatoms may be optionally oxidized (i.e., NO and S(O)p, wherein p is 1 or 2). The 5- to 6-membered heteroaryl may be attached to the rest of the molecule through a heteroatom or a carbon atom. The 5- to 6-membered heteroaryl includes 5-membered and 6-membered heteroaryl. Examples of the 5- to 6-membered heteroaryl include, but are not limited to, pyrrolyl (including N-pyrrolyl, 2-pyrrolyl, and 3-pyrrolyl, etc.), pyrazolyl (including 2-pyrazolyl and 3-pyrazolyl, etc.), imidazolyl (including N-imidazolyl, 2-imidazolyl, 4-imidazolyl, and 5-imidazolyl, etc.), oxazolyl (including 2-oxazolyl, 4-oxazolyl, and 5-oxazolyl, etc.), triazolyl (1H-1,2,3-triazolyl, 2H-1,2,3-triazolyl, 1H-1,2,4-triazolyl, and 4H-1,2,4-triazolyl, etc.), tetrazolyl, isoxazolyl (3-isoxazolyl, 4-isoxazolyl, and 5-isoxazolyl, etc.), thiazolyl (including 2-thiazolyl, 4-thiazolyl, and 5-thiazolyl, etc.), furyl (including 2-furyl and 3-furyl, etc.), thienyl (including 2-thienyl and 3-thienyl, etc.), pyridyl (including 2-pyridyl, 3-pyridyl, and 4-pyridyl, etc.), pyrazinyl, or pyrimidinyl (including 2-pyrimidinyl and 4-pyrimidinyl, etc.).
The term “leaving group” refers to a functional group or atom which can be substituted by another functional group or atom through a substitution reaction (such as nucleophilic substitution reaction). For example, representative leaving groups include triflate; chlorine, bromine, and iodine; sulfonate group, such as mesylate, tosylate, p-bromobenzenesulfonate, p-toluenesulfonate, etc.; acyloxy, such as acetoxy, trifluoroacetoxy, etc.
The term “protecting group” includes, but is not limited to, “amino protecting group”, “hydroxyl protecting group”, or “mercapto protecting group”. The term “amino protecting group” refers to a protecting group suitable for preventing the side reactions occurring at the nitrogen of an amino. Representative amino protecting groups include, but are not limited to: formyl; acyl, such as alkanoyl (e.g., acetyl, trichloroacetyl, or trifluoroacetyl); alkoxycarbonyl, such as tert-butoxycarbonyl (Boc); arylmethoxycarbonyl such as benzyloxycarbonyl (Cbz) and 9-fluorenylmethoxycarbonyl (Fmoc); arylmethyl, such as benzyl (Bn), trityl (Tr), 1,1-bis-(4′-methoxyphenyl)methyl; silyl, such as trimethylsilyl (TMS) and tert-butyldimethylsilyl (TBS). The term “hydroxyl protecting group” refers to a protecting group suitable for preventing the side reactions of hydroxyl. Representative hydroxyl protecting groups include, but are not limited to: alkyl, such as methyl, ethyl, and tert-butyl; acyl, such as alkanoyl (e.g., acetyl); arylmethyl, such as benzyl (Bn), p-methoxybenzyl (PMB), 9-fluorenylmethyl (Fm), and diphenylmethyl (benzhydryl, DPM); silyl, such as trimethylsilyl (TMS) and tert-butyl dimethylsilyl (TBS).
The compounds of the present disclosure can be prepared by a variety of synthetic methods known to those skilled in the art, including the specific embodiments listed below, the embodiments formed by their combination with other chemical synthesis methods, and equivalent alternatives known to those skilled in the art, preferred embodiments include but are not limited to the examples of the present disclosure.
The structure of the compounds of the present disclosure can be confirmed by conventional methods known to those skilled in the art, and if the present disclosure involves an absolute configuration of a compound, then the absolute configuration can be confirmed by means of conventional techniques in the art. For example, in the case of single crystal X-ray diffraction (SXRD), the absolute configuration can be confirmed by collecting diffraction intensity data from the cultured single crystal using a Bruker D8 venture diffractometer with CuKα radiation as the light source and scanning mode: φ/ω scan, and after collecting the relevant data, the crystal structure can be further analyzed by direct method (Shelxs97), so that the absolute configuration can be confirmed.
The solvents used in the present disclosure are commercially available.
The following abbreviations are used in the present disclosure: Alloc stands for allyloxycarbonyl; SEM stands for trimethylsilylethoxymethyl; OTs stands for 4-toluenesulfonyl; Boc stands for tert-butoxycarbonyl; DCM stands for dichloromethane; DIEA stands for N,N-diisopropylethylamine; Mel stands for iodomethane; PE stands for petroleum ether; EA stands for ethyl acetate; THE stands for tetrahydrofuran; EtOH stands for ethanol; MeOH stands for methanol; Boc2O stands for di-tert-butyl dicarbonate; NH4Cl stands for ammonium chloride; T3P stands for propylphosphonic anhydride; Pd/C stands for palladium/carbon catalyst; TMSN3 stands for azidotrimethylsilane; NCS stands for N-chlorosuccinimide; HBr stands for hydrobromic acid; AcOH stands for acetic acid; HATU stands for O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate; DBU stands for 1,8-diazabicyclo[5.4.0]undec-7-ene; FA stands for formic acid; ACN stands for acetonitrile; TLC stands for thin-layer chromatography; HPLC stands for high performance liquid chromatography; pre-HPLC stands for preparative high performance liquid chromatography; LCMS stands for liquid chromatography-mass chromatography. DMSO stands for dimethyl sulfoxide; DMSO-d6 stands for deuterated dimethyl sulfoxide; CD3OD stands for deuterated methanol; CDCl3 stands for deuterated chloroform; D2O stands for deuterium water.
The compounds of the present disclosure are named according to the conventional naming principles in the art or by ChemDraw® software, and the commercially available compounds use the supplier catalog names.
The present disclosure is described in detail by the examples below, but it does not mean that there are any adverse restrictions on the present disclosure. The compounds of the present disclosure can be prepared by a variety of synthetic methods known to those skilled in the art, including the specific embodiments listed below, the embodiments formed by their combination with other chemical synthesis methods, and equivalent alternatives known to those skilled in the art, preferred embodiments include but are not limited to the examples of the present disclosure. It will be apparent to those skilled in the art that various variations and improvements can be made to specific embodiments of the present disclosure without departing from the spirit and scope of the present disclosure.
Synthetic Route:
Intermediate A-1 (1.50 g, 11.2 mmol) was dissolved in dichloromethane (30 mL), and N-bromosuccinimide (1.99 g, 11.2 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was added with water (10 mL) and extracted with dichloromethane (20 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 5/1, V/V) to obtain intermediate A-2. 1H NMR (400 MHz, CDCl3) δ 7.23 (d, J=8.0 Hz, 1H), 6.71 (d, J=8.0 Hz, 1H), 5.46 (s, 1H), 2.95-2.87 (m, 4H), 2.15-2.08 (m, 2H).
Intermediate A-2 (940 mg, 4.41 mmol) was dissolved in dioxane (10 mL), and bis(pinacolato)diboron (1.34 g, 5.29 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (323 mg, 441 μmol), and potassium acetate (1.30 g, 13.2 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain intermediate A. 1H NMR (400 MHz, CDCl3) δ 7.91 (s, 1H), 7.44 (d, J=7.6 Hz, 1H), 6.81 (d, J=7.6 Hz, 1H), 2.94-2.87 (m, 4H), 2.12-2.04 (m, 2H), 1.36 (s, 12H).
Synthetic Route:
Compound 1-1 (350 mg, 2.44 mmol) and compound 1-2 (349 mg, 2.44 mmol) were dissolved in dichloromethane (2 mL), and propylphosphonic anhydride (4.65 g, 7.31 mmol, 50% ethyl acetate solution) and triethylamine (740 mg, 7.31 mmol) were added thereto. The reaction mixture was stirred at 20° C. for 12 hours. The reaction mixture was diluted with ethyl acetate (50 mL), washed with water (10 mL), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (separation column: Welch Xtimate C18 150×25 mm×5 μm; mobile phase: 10 mmol ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 13% to 43%, 9 min) to obtain compound 1-3. MS-ESI calculated for [M+H]+ 269, found 269.
Compound 1-3 (150 mg, 558 μmol) and compound 1-4 (149 mg, 725 μmol) were dissolved in 1,4-dioxane (4 mL) and water (1 mL), and then the reaction mixture was added with potassium carbonate (231 mg, 1.67 mmol) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (41 mg, 56 μmol). The reaction mixture was heated to 85° C. and reacted for 10 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (dichloromethane/methanol, 20/1 to 5/1, V/V) to obtain the crude product, which was separated by SFC (separation column: Phenomenex-Cellulose-2 250 mm×30 mm×10 μm; mobile phase: supercritical CO2—a solution of 0.1% ammonia water in ethanol; gradient: ethanol: 30% to 30%) to obtain compound 1a (the first peak) and compound 1b (the second peak). The e.e. values were then measured by SFC (chromatographic column: Cellulose 2 150 mm×4.6 mm×5 μm; mobile phase: supercritical CO2—a solution of 0.05% diethylamine in ethanol; gradient: a solution of 0.05% diethylamine in ethanol: 5% to 40%).
Compound 1a: e.e. %=99.3%, RT=3.879 min. 1H NMR (400 MHz, CD3OD) δ 8.38 (s, 1H), 7.44 (d, J=8.0 Hz, 1H), 7.27 (d, J=8.0 Hz, 1H), 7.21 (s, 1H), 2.96-2.90 (m, 1H), 2.82-2.73 (m, 2H), 2.46-2.38 (m, 1H), 2.36 (s, 3H), 2.28 (s, 3H), 2.25-2.19 (m, 1H), 2.01-1.93 (m, 1H), 1.87-1.81 (m, 1H), 1.74-1.59 (m, 2H). MS-ESI calculated for [M+H]+ 395, found 395.
Compound 1b: e.e. %=98.24%, RT=4.687 min. 1H NMR (400 MHz, CD3OD) δ 8.38 (s, 1H), 7.44 (d, J=8.0 Hz, 1H), 7.26 (d, J=8.0 Hz, 1H), 7.21 (s, 1H), 2.94-2.90 (m, 1H), 2.82-2.71 (m, 2H), 2.46-2.38 (m, 1H), 2.35 (s, 3H), 2.27 (s, 3H), 2.25-2.19 (m, 1H), 2.01-1.93 (m, 1H), 1.87-1.81 (m, 1H), 1.74-1.59 (m, 2H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
Compound 2-1 (504 mg, 4.42 mmol) and compound 2-2 (600 mg, 3.68 mmol) were dissolved in N-methylpyrrolidone (0.5 mL), and then N,N-diisopropylethylamine (1.92 mL, 11.04 mmol) was added thereto. The reaction mixture was heated to 180° C. under microwave irradiation and reacted for 2 hours. The reaction mixture was concentrated under reduced pressure, diluted with ethyl acetate (50 mL×2), washed with water (20 mL×2), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 20/1 to 5/1, V/V) to obtain the crude product, which was separated by SFC (separation column: DAICEL CHIRALPAK AS 250 mm×30 mm×10 μm; mobile phase: supercritical CO2—a solution of 0.1% ammonia water in ethanol; gradient: ethanol: 15% to 15%) to obtain compound 2-3. 1H NMR (400 MHz, CDCl3) δ 6.53 (s, 1H), 5.17 (s, 1H), 4.04 (s, 1H), 2.68-2.33 (m, 3H), 2.27 (s, 6H), 2.22-2.06 (m, 1H), 1.84-1.53 (m, 3H), 1.86-1.51 (m, 1H). MS-ESI calculated for [M+H]+ 241, found 241. MS-ESI calculated for [M+H]+ 241, found 241.
Compound 2-3 (77 mg, 320 μmol) and intermediate A (100 mg, 384 μmol) were dissolved in 1,4-dioxane (2 mL) and water (0.5 mL), and then the reaction mixture was added with potassium carbonate (132 mg, 960 mmol) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (23 mg, 32 μmol). The reaction mixture was heated to 90° C. and reacted for 10 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (dichloromethane/methanol, 20/1 to 5/1, V/V) to obtain the crude product of compound 2, which was then separated by preparative high performance liquid chromatography (separation column: Phenomenex Gemini-NX 80×40 mm×3 μm; mobile phase: 0.04% ammonia solution-acetonitrile; gradient: acetonitrile: 20% to 50%, 8 min) to obtain compound 2. 1H NMR (400 MHz, CDCl3) δ 11.54 (s, 1H), 7.22 (d, J=8.0 Hz, 1H), 6.88-6.79 (m, 2H), 7.21 (s, 1H), 4.52 (s, 1H), 3.04-2.93 (m, 5H), 2.89-2.74 (m, 2H), 2.69-2.48 (m, 2H), 2.43 (s, 3H), 2.19-2.05 (m, 4H), 1.83-1.66 (m, 3H). MS-ESI calculated for [M+H]+ 339, found 339.
Synthetic Route:
Compound 1-1 (500 mg, 3.86 mmol) and compound 3-1 (553 mg, 2.44 mmol) were dissolved in dichloromethane (2 mL), and propylphosphonic anhydride (7.37 g, 6.89 mmol, 50% ethyl acetate solution) and triethylamine (1.17 g, 11.58 mmol) were added thereto. The reaction mixture was stirred at 20° C. for 12 hours. The reaction mixture was added with water (10 mL) and 1M NaOH aqueous solution (8 mL), extracted with ethyl acetate (30 mL×3), and the organic phase was washed with saturated brine (10 mL), dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was subjected to preparative high performance liquid chromatography (separation column: Welch Xtimate C18 150×25 mm×5 μm; mobile phase: 10 mmol ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 16% to 46%, 9 min) to obtain compound 3-2. MS-ESI calculated for [M+H]+ 255, found 255.
Compound 3-2 (50 mg, 196 μmol) and compound 3-3 (48 mg, 216 μmol) were dissolved in 1,4-dioxane (2 mL) and water (0.4 mL), and then the reaction mixture was added with potassium carbonate (81 mg, 588 μmol) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (14 mg, 20 μmol). The reaction mixture was heated to 85° C. and reacted for 10 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (dichloromethane/methanol, 20/1 to 5/1, V/V) to obtain the crude product, which was separated by preparative high performance liquid chromatography (separation column: Phenomenex Synergi C18 150×30 mm×4 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 22% to 52%, 10 min) to obtain the hydrochloride of compound 3. 1H NMR (400 MHz, CD3OD) δ 8.97-8.85 (m, 1H), 8.31-8.15 (m, 1H), 7.20 (s, 1H), 7.11 (s, 1H), 3.86-3.68 (m, 1H), 3.61-3.42 (m, 1H), 3.35 (s, 1H), 3.28-3.17 (m, 2H), 3.10-2.98 (m, 1H), 2.94 (d, J=2.0 Hz, 3H), 2.26 (d, J=3.0 Hz, 4H), 2.15-1.94 (m, 2H), 1.92-1.68 (m, 1H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
Compound 4-1 (2.46 g, 7.86 mmol), compound 4-2 (1.00 g, 7.15 mmol), tetrakis(triphenylphosphine)palladium (826 mg, 715 μmol), and potassium carbonate (2.96 g, 21.4 mmol) were dissolved in water (10 mL) and dioxane (30 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate=20/1 to 5/1) to obtain compound 4-3. 1H NMR (400 MHz, CD3OD) 7.67-7.63 (m, 2H), 7.59-7.57 (m, 1H), 7.20-7.15 (m, 3H), 7.09-7.06 (m, 1H), 3.95 (s, 3H).
Compound 4-3 (50.0 mg, 178 μmol), bis(pinacolato)diboron (90.3 mg, 356 μmol), potassium acetate (52.4 mg, 534 μmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (14.5 mg, 17.8 μmol) were dissolved in dioxane (3 mL), and the reaction mixture was stirred at 100° C. for 16 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to obtain compound 4-4.
Compound 4-4 (60.0 mg, 183 μmol), compound 2-3 (35.8 mg, 146 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (13.4 mg, 18.3 μmol), and potassium carbonate (75.8 mg, 549 μmol) were dissolved in water (0.5 mL) and dioxane (3 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure and the crude product was purified by thin-layer chromatography (dichloromethane/methanol, 5/1, V/V) to obtain compound 4-5. MS-ESI calculated for [M+H]+ 407, found 407.
Compound 4-5 (53.0 mg, 109 μmol) was dissolved in anhydrous dichloromethane (5 mL), and the reaction mixture was cooled to 0° C., and then boron tribromide (136 mg, 542 mol) was added to the reaction mixture. The reaction mixture was warmed to 20° C. and stirred for 12 hours. The reaction mixture was quenched with methanol (5 mL) and concentrated under reduced pressure, then ammonia water (1 mL) was added thereto, and the reaction mixture was concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Gemini-NX C18 75×30 mm×3 μm; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 29% to 59%, 6.5 min) to obtain compound 4. 1H NMR (400 MHz, CD3OD) 7.68-7.65 (m, 2H), 7.32-7.30 (m, 1H), 7.22-7.18 (m, 3H), 7.16-7.14 (m, 1H), 6.79 (s, 1H), 4.18-4.11 (m, 1H), 3.11-3.07 (m, 1H), 2.74-2.72 (m, 1H), 2.33 (s, 3H), 2.28 (m, 1H), 2.21 (m, 3H), 2.02 (m, 2H), 1.87-1.82 (m, 1H), 1.77-1.69 (m, 1H), 1.46-1.40 (m, 1H). MS-ESI calculated for [M+H]+ 393, found 393.
Synthetic Route:
Compound 5-1 (50.0 mg, 211 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (17.2 mg, 21.1 μmol), bis(pinacolato)diboron (107 mg, 422 μmol), and potassium acetate (41.4 mg, 422 μmol) were dissolved in dioxane (3 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to obtain compound 5-2, which was directly used in the next step without purification.
Compound 5-2 (60.0 mg, 211 μmol), compound 2-3 (41.4 mg, 169 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (15.5 mg, 21.1 μmol), and potassium carbonate (87.6 mg, 634 μmol) were dissolved in water (0.5 mL) and dioxane (3 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was purified by thin-layer chromatography (dichloromethane/methanol, 5/1, V/V) to obtain compound 5-3. MS-ESI calculated for [M+H]+ 363, found 363.
Compound 5-3 (32.0 mg, 71.5 μmol) was dissolved in dry dichloromethane (5 mL), and the reaction mixture was cooled to 0° C. in an ice-water bath, and then boron tribromide (89.5 mg, 357 μmol) was slowly added to the reaction mixture. The reaction mixture was warmed to 20° C., and stirred at 20° C. for 12 hours. The reaction mixture was quenched with methanol (5 mL) and concentrated under reduced pressure, then ammonia water (1 mL) was added thereto, and the reaction mixture was concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Luna C18 75×30 mm×3 μm; 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 8% to 28%, 6 min) to obtain the hydrochloride of compound 5. 1H NMR (400 MHz, CD3OD) δ 8.35-8.33 (m, 1H), 7.98-7.96 (m, 1H), 7.71-7.59 (m, 4H), 7.41-7.38 (m, 1H), 4.41-4.32 (m, 1H), 3.90-3.84 (m, 1H), 3.60-3.56 (m, 1H), 3.17-3.03 (m, 1H), 3.03-2.96 (m, 3H), 2.93-2.92 (m, 1H), 2.38-2.37 (m, 3H), 2.31-2.28 (m, 1H), 2.18-2.02 (m, 2H), 1.76-1.66 (m, 1H). MS-ESI calculated for [M+H]+ 349, found 349.
Synthetic Route:
Compound 6-1 (300 mg, 1.76 mmol) was dissolved in N-methylpyrrolidone (3 mL), and compound 2-2 (345 mg, 2.11 mmol) and N,N-diisopropylethylamine (683 mg, 5.29 mmol) were added thereto. The reaction mixture was stirred under microwave irradiation at 180° C. for 2 hours, added with water (10 mL), and extracted with ethyl acetate (20 mL×4). The organic phases were combined, washed with saturated brine (20 mL×3), dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 10/1 to 5/1, V/V) to obtain the crude product, which was separated by SFC (separation column: DAICEL CHIRALPAK AS 250 mm×30 mm×10 μm; mobile phase: supercritical CO2-0.1% ammonia solution-ethanol; gradient: a solution of 0.1% ammonia water in ethanol: 20% to 20%) to obtain compound 6-2. MS-ESI calculated for [M+H]+ 297, found 297.
Compound 6-2 (75.0 mg, 253 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate A (78.9 mg, 303 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (18.5 mg, 25.3 μmol), and potassium carbonate (87.3 mg, 632 μmol) were added thereto. The reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product, which was separated by SFC (separation column: DAICEL CHIRALPAK AD 250 mm×30 mm×10 m; mobile phase: supercritical CO2—a solution of 0.1% ammonia water in ethanol; gradient: a solution of 0.1% ammonia water in ethanol: 55% to 55%) to obtain compound 6. The e.e. values were then measured by SFC (chromatographic column: Chiralpak AS-3 250 mm×30 mm×10 μm; mobile phase: supercritical CO2—a solution of 0.05% diethylamine in ethanol; gradient: a solution of 0.05% diethylamine in ethanol: 5% to 40%). e.e. %=100%, RT=2.417 min, 1H NMR (400 MHz, CD3OD) δ 7.19 (s, 1H), 7.04 (d, J=7.6 Hz, 1H), 6.86 (d, J=7.6 Hz, 1H), 4.30-4.24 (m, 1H), 4.09-4.03 (m, 2H), 3.90 (d, J=8.8 Hz, 1H), 3.76 (d, J=8.8 Hz, 1H), 3.43-3.37 (m, 1H), 3.05 (d, J=4.4 Hz, 1H), 2.98-2.90 (m, 4H), 2.24 (s, 3H), 2.18-2.10 (m, 2H), 1.91-1.80 (m, 2H), 1.75-1.68 (m, 2H), 1.24 (d, J=6.4 Hz, 3H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
Compound 7-1 (100 mg, 1.19 mmol) was dissolved in 1,4-dioxane (8 mL), and then the reaction mixture was added with compound 2-2 (194 mg, 1.19 mmol), tris(dibenzylideneacetone)dipalladium(0) (145 mg, 158 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (183 mg, 317 mmol), and cesium carbonate (645 mg, 1.98 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 25%, 10 min) to obtain the hydrochloride of compound 7-2. MS-ESI calculated for [M+H]+ 253, found 253.
The hydrochloride of compound 7-2 (100 mg, 396 μmol) and intermediate A (206 mg, 791 μmol) were dissolved in 1,4-dioxane (4 mL) and water (0.8 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (29 mg, 40 μmol) and potassium carbonate (191 mg, 1.38 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 25%, 10 min) to obtain the hydrochloride of compound 7. 1H NMR (400 MHz, CD3OD) δ 7.45 (s, 1H), 7.09 (d, J=7.8 Hz, 1H), 6.95 (d, J=7.8 Hz, 1H), 4.46-4.32 (m, 1H), 3.92-3.87 (m, 1H), 3.54-3.33 (m, 4H), 3.27 (d, J=3.8 Hz, 1H), 3.00-2.97 (m, 2H), 32.94-2.90 (m, 2H), 2.46-2.45 (m, 1H), 2.39-2.32 (m, 1H), 2.30 (s, 3H), 2.19-2.10 (m, 4H), 2.05-1.86 (m, 1H). MS-ESI calculated for [M+H]+ 351, found 351.
Synthetic Route:
Compound 8-1 (1.00 g, 4.46 mmol) and iodomethane (1.27 g, 8.93 mmol) were dissolved in acetonitrile (10 mL), and the reaction mixture was added with potassium carbonate (1.85 g, 13.4 mmol), stirred at 40° C. for 12 hours. The reaction mixture was quenched with saturated sodium bicarbonate solution (10 mL). The reaction mixture was concentrated under reduced pressure and the crude product was purified by silica gel column chromatography (dichloromethane/methanol, 50/1, V/V) to obtain compound 8-2. MS-ESI calculated for [M+H]+ 240, found 240.
Compound 8-2 (500 mg, 2.10 mmol), potassium acetate (412 mg, 4.20 mmol), bis(pinacolato)diboron (1.07 g, 4.20 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (172 mg, 210 μmol) were dissolved in dioxane (10 mL), and the reaction mixture was stirred at 90° C. for 3 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 100/0 to 20/1, V/V) to obtain compound 8-3. 1H NMR (400 MHz, CD3OD) δ 8.90-8.80 (m, 1H), 8.37-8.34 (m, 1H), 7.80-7.78 (m, 1H), 7.68-7.66 (m, 1H), 7.60-7.57 (m, 1H), 3.08 (s, 3H), 1.43 (s, 12H). MS-ESI calculated for [M+H]+ 286, found 286.
Compound 8-3 (50.0 mg, 175 μmol), compound 2-3 (46.4 mg, 193 μmol), tetrakis(triphenylphosphine)palladium (20.3 mg, 17.5 μmol), and cesium carbonate (171 mg, 526 μmol) were dissolved in water (0.3 mL) and dioxane (3 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure and the crude product was purified by thin-layer chromatography (dichloromethane/methanol, 5/1, V/V) to obtain compound 8-4. MS-ESI calculated for [M+H]+ 364, found 364.
Compound 8-4 (70.0 mg, 155 μmol) was dissolved in anhydrous dichloromethane (5 mL), and the reaction mixture was cooled to 0° C. in an ice-water bath, and then boron tribromide (194 mg, 774 μmol) was slowly added to the reaction mixture. The reaction mixture was stirred at 20° C. for 12 hours. The reaction mixture was quenched with methanol (5 mL), concentrated under reduced pressure, then added with ammonia water (1 mL), and concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Luna C18 75×30 mm×3 μm; 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 0% to 15%, 6 min) to obtain the hydrochloride of compound 8. 1H NMR (400 MHz, CD3OD) δ 9.14-9.13 (m, 1H), 9.05-9.03 (m, 1H), 8.10-8.07 (m, 1H), 7.92-7.89 (m, 1H), 7.80-7.76 (m, 1H), 7.73-7.66 (m, 1H), 4.45-4.33 (m, 1H), 3.86-3.83 (m, 1H), 3.59-3.56 (m, 1H), 3.41-3.35 (m, 1H), 3.16-3.05 (m, 1H), 2.98-2.93 (m, 3H), 2.36 (s, 3H), 2.34-2.29 (m, 1H), 2.16-2.06 (m, 2H), 1.99-1.68 (m, 1H). MS-ESI calculated for [M+H]+ 350, found 350.
Synthetic Route:
Compound 9-1 (200 mg, 1.58 mmol) was dissolved in 1,4-dioxane (8 mL), and then the reaction mixture was added with compound 2-2 (387 mg, 2.38 mmol), tris(dibenzylideneacetone)dipalladium(0) (290 mg, 317 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (367 mg, 634 mmol), and cesium carbonate (1.29 g, 3.96 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 25%, 10 min) to obtain the hydrochloride of compound 9-2. MS-ESI calculated for [M+H]+ 253, found 253.
The hydrochloride of compound 9-2 (100 mg, 396 μmol) and intermediate A (206 mg, 791 μmol) were dissolved in 1,4-dioxane (4 mL) and water (0.8 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (29 mg, 40 μmol) and potassium carbonate (191 mg, 1.38 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 25%, 10 min) to obtain the hydrochloride of compound 9. 1H NMR (400 MHz, CD3OD) δ 7.63 (s, 1H), 7.12 (d, J=7.6 Hz, 1H), 6.98 (d, J=7.6 Hz, 1H), 4.39 (s, 1H), 3.92-3.86 (m, 1H), 3.55-3.36 (m, 4H), 3.27 (d, J=3.8 Hz, 1H), 3.01-2.98 (m, 2H), 2.95-2.91 (m, 2H), 2.46 (s, 1H), 2.34 (s, 4H), 2.23-2.06 (m, 4H), 1.99 (s, 1H). MS-ESI calculated for [M+H]+ 351, found 351.
Synthetic Route:
Compound 10-1 (3.00 g, 15.9 mmol) was dissolved in N,N-dimethylformamide (30 mL), cooled to 0° C. in an ice-water bath, and the reaction mixture was added with sodium hydride (1.14 g, 28.6 mmol, purity: 60%), stirred for one hour, then added with benzyl bromide (3.26 g, 19.1 mmol), and stirred at 20° C. for 12 hours. The reaction mixture was quenched with saturated ammonium chloride (20 mL), extracted with ethyl acetate (20 mL×3), and the organic phase was washed with hydrochloric acid solution (1 mol/L, 20 mL×2) and saturated brine (20 mL×2), dried over anhydrous sodium sulfate, and filtered. The filtrate was concentrated under reduced pressure, and the crude product was purified by thin-layer chromatography (petroleum ether/dichloromethane, 0/1, V/V) to obtain compound 10-2. 1H NMR (400 MHz, DMSO-d6) δ 9.72 (m, 1H), 7.48-7.40 (m, 4H), 7.36-7.31 (m, 2H), 6.59-6.58 (m, 1H), 6.36-6.33 (m, 1H), 5.14 (s, 2H). MS-ESI calculated for [M+H]+ 280, found 280.
Compound 10-2 (433 mg, 1.45 mmol) was dissolved in acetonitrile (10 mL), and the reaction mixture was added with cesium carbonate (1.42 g, 4.36 mmol) and compound 10-3 (535 mg, 2.91 mmol), stirred at 75° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the crude product was purified by column chromatography (petroleum ether/ethyl acetate, 20/1 to 10/1, V/V) to obtain compound 10-4. MS-ESI calculated for [M+H]+ 336, found 336.
Compound 10-4 (330 mg, 984 μmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (80.8 mg, 197 μmol), and tris(dibenzylideneacetone)dipalladium (90.1 mg, 98.4 μmol) were dissolved in dioxane (5 mL). The reaction mixture was added with triethylamine (299 mg, 2.95 mmol) and pinacolborane (252 mg, 1.97 mmol), stirred at 75° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to obtain compound 10-5. MS-ESI calculated for [M+H]+ 383, found 383.
Compound 10-5 (300 mg, 784 μmol), compound 2-3 (208 mg, 863 μmol), sodium bicarbonate (198 mg, 2.35 mmol), and tetrakis(triphenylphosphine)palladium (90.7 mg, 78.5 mol) were dissolved in water (0.3 mL) and dioxane (3 mL), and the reaction mixture was stirred at 104° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure and the crude product was purified by thin-layer chromatography (dichloromethane/methanol, 5/1, V/V) to obtain compound 10-6. MS-ESI calculated for [M+H]+ 461, found 461.
Compound 10-6 (25 mg, 54.3 μmol) was dissolved in ethyl acetate (5 mL), and the reaction mixture was added with palladium/carbon (54.3 μmol, purity: 10%) and acetic acid (326 μg, 5.43 μmol), replaced with hydrogen three times, and the reaction mixture was stirred at 90° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Luna C18 75×30 mm×3 μm; 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 13% to 33%, 6 min) to obtain the hydrochloride of compound 10. 1H NMR (400 MHz, CD3OD) δ 7.65-7.49 (m, 1H), 7.31-7.24 (m, 1H), 6.67 (dd, J=2.2, 8.6 Hz, 1H), 6.59 (d, J=2.2 Hz, 1H), 4.41-4.21 (m, 1H), 3.86-3.78 (m, 3H), 3.56 (d, J=6.4 Hz, 1H), 3.17-3.00 (m, 1H), 3.21-2.78 (m, 4H), 2.39-2.35 (m, 3H), 2.32-2.20 (m, 1H), 2.17-1.96 (m, 3H), 1.73-1.63 (m, 1H), 1.07 (d, J=6.4 Hz, 6H). MS-ESI calculated for [M+H]+ 371, found 371.
Synthetic Route:
Compound 4-1 (1.5 g, 4.79 mmol) was dissolved in dimethyl sulfoxide (8 mL), and then the reaction mixture was added with potassium metabisulfite (2.13 g, 9.59 mmol), tetrabutyl ammonium bromide (1.70 g, 5.27 mmol), palladium acetate (54 mg, 240 μmol), triphenylphosphine (189 mg, 719 μmol), o-phenanthroline (129 mg, 719 μmol), and sodium formate (569 μL, 11 mmol). The reaction mixture was replaced with nitrogen for 10 minutes, and then heated to 70° C. and reacted for 3 hours under nitrogen atmosphere. Then the reaction mixture was cooled to 20° C., and the system was added with iodomethane (0.6 mL, 9.59 mmol), and continued to stir for 18 hours. The reaction mixture was added with water (30 mL) and extracted with ethyl acetate (20 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 11-1. 1H NMR (400 MHz, CDCl3) δ 7.70 (d, J=8.0 Hz, 1H), 7.28-7.22 (m, 1H), 7.14-7.12 (m, 1H), 3.97 (s, 3H), 3.49 (s, 3H).
Compound 11-1 (900 mg, 3.39 mmol) was dissolved in 1,4-dioxane (10 mL), then the reaction mixture was added with bis(pinacolato)diboron (1.29 g, 5.09 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (248 mg, 339 μmol), and potassium carbonate (1.0 g, 10.2 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was added with water (20 mL) and extracted with ethyl acetate (20 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 11-2. 1H NMR (400 MHz, CDCl3) δ 7.83 (d, J=7.8 Hz, 1H), 7.50 (dd, J=1.4, 7.8 Hz, 1H), 7.37 (d, J=1.4 Hz, 1H), 3.91 (s, 3H), 3.04 (s, 3H), 1.37 (s, 12H).
Compound 11-2 (200 mg, 640 μmol) and compound 2-3 (154 mg, 640 μmol) were dissolved in 1,4-dioxane (4 mL) and water (0.8 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (47 mg, 64 μmol) and potassium carbonate (310 mg, 2.24 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 11-3. MS-ESI calculated for [M+H]+ 391, found 391.
The hydrochloride of compound 11-3 (45 mg, 97 μmol) was dissolved in dichloromethane (5 mL), cooled to 0° C. in an ice-water bath, and then the reaction mixture was added with boron tribromide (28 μL, 291 μmol), reacted at 0° C. for 2 hours under nitrogen atmosphere. The reaction mixture was quenched with water (5 mL), and concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 30%, 10 min) to obtain the hydrochloride of compound 11. 1H NMR (400 MHz, CD3OD) δ 7.74-7.45 (m, 4H), 4.47-4.27 (m, 1H), 3.91-3.76 (m, 1H), 3.57 (d, J=11.2 Hz, 1H), 3.20 (s, 3H), 3.00-2.91 (m, 3H), 2.35 (s, 3H), 2.28 (d, J=10.8 Hz, 1H), 2.20-2.08 (m, 1H), 1.80-1.63 (m, 1H), 1.22 (s, 3H). MS-ESI calculated for [M+H]+ 377, found 377.
Synthetic Route:
Compound 12-1 (12.5 g, 62.6 mmol) was dissolved in 1,4-dioxane (200 mL), and then the reaction mixture was added with compound 2-2 (8.50 g, 52.2 mmol), tris(dibenzylideneacetone)dipalladium (4.78 g, 5.21 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (6.03 g, 10.43 mmol), and cesium carbonate (42.5 g, 130 mmol). The reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 30% to 60%, 10 min) to obtain compound 12-2. 1H NMR (400 MHz, CDCl3) δ 6.56 (s, 1H), 4.84 (s, 1H), 3.87 (s, 1H), 3.72 (d, J=13.6 Hz, 1H), 3.52-3.43 (m, 1H), 3.32 (d, J=9.2 Hz, 2H), 2.29 (s, 3H), 1.99-1.94 (m, 1H), 1.74-1.66 (m, 2H), 1.58 (s, 1H), 1.44 (s, 9H). MS-ESI calculated for [M+H]+ 327, found 327.
Compound 12-2 (2.10 g, 6.43 mmol) was dissolved in tetrahydrofuran (20 mL), and sodium hydride (386 mg, 9.64 mmol, purity: 60%) was added thereto at 0° C., and then benzyl chloroformate (2.19 g, 12.9 mmol) was added thereto. The reaction mixture was stirred at 60° C. for 12 hours. The reaction mixture was added with water (10 mL) and extracted with ethyl acetate (30 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 3/1, V/V) to obtain compound 12-3. MS-ESI calculated for [M-56+H]+ 405, found 405.
Compound 12-3 (600 mg, 1.30 mmol) was dissolved in ethyl acetate (5 mL), and hydrogen chloride-ethyl acetate (4 mol/L, 10 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The reaction mixture was concentrated under reduced pressure to obtain the hydrochloride of compound 12-4, which was directly used in the next step without purification. MS-ESI calculated for [M+H]+ 361, found 361.
The hydrochloride of compound 12-4 (200 mg, 503 μmol) was dissolved in acetonitrile (10 mL), then bromoacetonitrile (121 mg, 1.01 mmol) and potassium carbonate (278 mg, 2.01 mmol) were added thereto, and the reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 12-5. MS-ESI calculated for [M+H]+ 400, found 400.
Compound 12-5 (190 mg, 475 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and intermediate A (136 mg, 523 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (34.8 mg, 47.5 μmol), and potassium carbonate (164 mg, 1.19 mmol) were added thereto. The reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain the crude product, which was separated by high performance liquid chromatography (chromatographic column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 10% to 40%, 10 min) to obtain the hydrochloride of compounds 12a and 12b. The hydrochloride of compounds 12a and 12b was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Gemini-NX 80×30 mm×3 μm; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 38% to 68%, 9 min) to obtain compounds 12a and 12b.
Compound 12a: 1H NMR (400 MHz, CD3OD) δ 7.04 (d, J=7.2 Hz, 1H), 6.85 (d, J=7.2 Hz, 1H), 6.81 (s, 1H), 4.20-4.14 (m, 1H), 3.71 (s, 2H), 3.08-3.06 (m, 1H), 2.98-2.89 (m, 4H), 2.73-2.71 (m, 1H), 2.48-2.44 (m, 1H), 2.36-2.31 (m, 1H), 2.18 (s, 3H), 2.15-2.10 (m, 2H), 1.98-1.95 (m, 1H), 1.92-1.87 (m, 1H), 1.77-1.69 (m, 1H), 1.49-1.47 (m, 1H). MS-ESI calculated for [M+H]+ 364, found 364.
Compound 12b: 1H NMR (400 MHz, CD3OD) δ 7.02 (d, J=7.6 Hz, 1H), 6.83 (d, J=7.6 Hz, 1H), 6.81 (s, 1H), 4.19-4.15 (m, 1H), 3.01 (d, J=4.0 Hz, 2H), 2.96-2.88 (m, 5H), 2.57-2.54 (m, 1H), 2.47-2.44 (m, 1H), 2.36-2.33 (m, 1H), 2.17 (s, 3H), 2.15-2.08 (m, 2H), 1.86-1.81 (m, 2H), 1.71-1.68 (m, 1H), 1.58-1.52 (m, 1H). MS-ESI calculated for [M+H]+ 382, found 382.
Synthetic Route:
The hydrochloride of compound 12-4 (200 mg, 503 μmol) was dissolved in methanol (5 mL) and dichloromethane (5 mL), and compound 13-1 (72.6 mg, 1.01 mmol), acetic acid (60.5 mg, 1.01 mmol), triethylamine (50.9 mg, 503 μmol), and sodium triacetoxyborohydride (320 mg, 1.51 mmol) were added thereto, and the reaction mixture was stirred at 25° C. for 12 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 13-2. MS-ESI calculated for [M-56+H]+361, found 361.
Compound 13-2 (46.0 mg, 110 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and intermediate A (31.6 mg, 121 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (8.07 mg, 11.0 μmol), and potassium carbonate (38.1 mg, 276 μmol) were added thereto. The reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 13-3. MS-ESI calculated for [M+H]+ 515, found 515.
Compound 13-3 (50.0 mg, 97.2 μmol) was dissolved in tetrahydrofuran (4 mL), and the mixture was added with wet palladium/carbon (1.00 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex Gemini-NX 80×30 mm×3 m; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 32% to 62%, 9 min) to obtain compound 13. 1H NMR (400 MHz, CD3OD) δ 7.03 (d, J=7.6 Hz, 1H), 6.85 (d, J=7.6 Hz, 1H), 6.81 (s, 1H), 4.71-4.68 (m, 3H), 4.64-4.61 (m, 2H), 4.17-4.13 (m, 1H), 3.56-3.53 (m, 1H), 2.98-2.89 (m, 5H), 2.55 (s, 1H), 2.18 (s, 3H), 2.15-2.12 (m, 2H), 2.01 (s, 2H), 1.86-1.83 (m, 1H), 1.76-1.68 (m, 1H), 1.51 (s, 1H). MS-ESI calculated for [M+H]+ 381, found 381.
Synthetic Route:
Compound 14-1 (260 mg, 250 μmol) and compound 2-3 (100 mg, 498 μmol) were dissolved in 1,4-dioxane (5 mL) and water (1 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (18 mg, 25 μmol) and potassium carbonate (103 mg, 0.75 mmol). The reaction mixture was heated to 110° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 14-2. MS-ESI calculated for [M+H]+ 363, found 363.
The hydrochloride of compound 14-2 (45 mg, 103 μmol) was dissolved in dichloromethane (3 mL), cooled to 0° C. in an ice-water bath, and then the reaction mixture was added with boron tribromide (30 μL, 310 μmol), reacted at 20° C. for 2 hours under nitrogen atmosphere. The reaction mixture was quenched with water (5 mL), and concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 1% to 30%, 10 min) to obtain the hydrochloride of compound 14. 1H NMR (400 MHz, CD3OD) δ 8.04-7.94 (m, 1H), 7.90 (d, J=8.0 Hz, 1H), 7.79 (d, J=8.0 Hz, 1H), 7.74-7.52 (m, 2H), 7.47-7.32 (m, 2H), 4.52-4.22 (m, 1H), 3.97-3.73 (m, 1H), 3.59-3.56 (m, 1H), 3.24-3.02 (m, 2H), 3.00-2.85 (m, 3H), 2.46-2.34 (m, 3H), 2.33-1.94 (m, 3H), 1.78-1.68 (m, 1H). MS-ESI calculated for [M+H]+ 349, found 349.
Synthetic Route:
Compound 15-1 (5 g, 35.7 mmol) was dissolved in N,N-dimethylformamide (30 mL), and then the reaction mixture was added with 1,2-dibromoethane (6.7 g, 35.7 mmol) and potassium carbonate (19.7 g, 143 mmol). The reaction mixture was heated to 60° C. and reacted for 6 hours under nitrogen atmosphere. The reaction mixture was added with water (50 mL) and extracted with ethyl acetate (30 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 15-2. 1H NMR (400 MHz, CDCl3) δ 6.86-6.71 (m, 1H), 6.60-6.44 (m, 2H), 4.39-4.30 (m, 2H), 4.28-4.26 (m, 2H), 3.95-3.81 (m, 3H).
Compound 15-2 (5 g, 30 mmol) was dissolved in dichloromethane (10 mL), cooled to 0° C. in an ice-water bath, and then the reaction mixture was added with N-bromosuccinimide (5.36 g, 30 mmol). The reaction mixture was reacted at 20° C. for 2 hours under nitrogen atmosphere. The reaction mixture was added with water (30 mL) and extracted with ethyl acetate (20 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 15-3. 1H NMR (400 MHz, CDCl3) δ 6.98 (d, J=9.0 Hz, 1H), 6.57 (d, J=9.0 Hz, 1H), 4.34-4.30 (m, 2H), 4.28-4.24 (m, 2H), 3.94-3.84 (m, 3H).
Compound 15-3 (760 mg, 3.10 mmol) was dissolved in 1,4-dioxane (10 mL), then the reaction mixture was added with bis(pinacolato)diboron (1.18 g, 4.65 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (226 mg, 310 μmol), and potassium carbonate (0.91 g, 9.30 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was added with water (10 mL) and extracted with ethyl acetate (20 mL×3), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/1, V/V) to obtain compound 15-4. 1H NMR (400 MHz, CDCl3) δ 7.18 (d, J=8.0 Hz, 1H), 6.64 (d, J=8.0 Hz, 1H), 4.31-4.21 (m, 4H), 3.85 (s, 3H), 1.38-1.30 (m, 12H).
Compound 15-4 (218 mg, 748 μmol) and compound 2-3 (60 mg, 249 μmol) were dissolved in 1,4-dioxane (5 mL) and water (1 mL), then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (18 mg, 25 μmol) and potassium carbonate (120 mg, 0.87 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 15-5. MS-ESI calculated for [M+H]+ 371, found 371.
The hydrochloride of compound 15-5 (45 mg, 97 μmol) was dissolved in dichloromethane (5 mL), cooled to 0° C. in an ice-water bath, and then the reaction mixture was added with boron tribromide (28 μL, 291 μmol), reacted at 0° C. for 2 hours under nitrogen atmosphere. The reaction mixture was quenched with water (5 mL), and concentrated under reduced pressure. The crude product was separated by preparative high performance liquid chromatography (separation column: Phenomenex Genimi NX C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 30%, 10 min) to obtain the hydrochloride of compound 15. 1H NMR (400 MHz, CD3OD) δ 7.78-7.42 (m, 1H), 6.85 (s, 1H), 6.61 (d, J=6.8 Hz, 1H), 4.37 (s, 5H), 3.93-3.75 (m, 1H), 3.56 (d, J=10.4 Hz, 1H), 3.22-3.00 (m, 1H), 2.90 (s, 4H), 2.45-2.29 (m, 3H), 2.25 (d, J=11.2 Hz, 1H), 2.29-1.87 (m, 2H), 1.72-1.69 (m, 1H). MS-ESI calculated for [M+H]+ 357, found 357.
Synthetic Route:
Compound 16-1 (3.00 g, 13.5 mmol), compound 16-2 (1.19 g, 13.8 mmol), tricyclohexylphosphine (950 mg, 3.39 mmol), and cesium carbonate (8.83 g, 27.1 mmol) were dissolved in toluene (100 mL) and water (10.0 mL), and the reaction mixture was added with palladium acetate (304 mg, 1.35 mmol) under nitrogen atmosphere, and the reaction was stirred at 80° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 16-3. 1H NMR (400 MHz, CDCl3) δ 7.24 (d, J=8.0 Hz, 1H), 6.69 (d, J=4.0 Hz, 1H), 6.62-6.60 (m, 1H), 3.91 (s, 3H), 1.93-1.86 (m, 1H), 1.02-0.97 (m, 2H), 0.72-0.68 (m, 2H).
Compound 16-3 (1.00 g, 5.48 mmol), bis(pinacolato)diboron (1.46 g, 5.75 mmol), and potassium acetate (1.07 g, 10.9 mmol) were dissolved in 1,4-dioxane (20.0 mL), and the reaction mixture was added with bis(tri-tert-butylphosphine)palladium(0) (280 mg, 0.547 mmol) under nitrogen atmosphere, and the reaction was stirred at 115° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 16-4. 1H NMR (400 MHz, CDCl3) δ 7.50 (d, J=8.0 Hz, 1H), 6.57-6.52 (m, 2H), 3.75 (s, 3H), 1.84-1.77 (m, 1H), 1.26 (s, 12H), 0.92-0.88 (m, 2H), 0.68-0.64 (m, 2H).
Compound 16-4 (171 mg, 0.623 mmol), compound 2-3 (100 mg, 0.415 mmol), and potassium phosphate (176 mg, 0.831 mmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was added with 1,1′-bis(di-tert-butylphosphino)ferrocene palladium dichloride dichloromethane (33.9 mg, 41.5 μmol) under nitrogen atmosphere, and the reaction was stirred at 115° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (dichloromethane/methanol/triethylamine, 5/1/0.002, V/V/V) to obtain compound 16-5. MS-ESI calculated for [M+H]+ 353, found 353.
Compound 16-5 (60.0 mg, 166 μmol) was dissolved in anhydrous dichloromethane (3.00 mL), and boron tribromide (125 mg, 499 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 20° C. for 1 hour. The reaction mixture was quenched with water (3.00 mL) and then concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (YMC Triart 30×150 mm×7 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 12% to 32%, 7 min) to obtain the hydrochloride of compound 16. 1H NMR (400 MHz, CD3OD) δ 7.47 (s, 1H), 7.23-7.20 (m, 1H), 6.80-6.78 (m, 1H), 6.73 (s, 1H), 4.34-4.24 (m, 1H), 3.85-3.79 (m, 1H), 3.56-3.53 (m, 1H), 3.05-2.99 (m, 1H), 2.94-2.88 (m, 3H), 2.35-2.33 (m, 3H), 2.26-2.23 (m, 1H), 2.12-1.99 (m, 1H), 1.97-1.91 (m, 3H), 1.71-1.61 (m, 1H), 1.08-1.03 (m, 2H), 0.77-0.73 (m, 2H). MS-ESI calculated for [M+H]+ 339, found 339.
Synthetic Route:
Compound 17-1 (1.00 g, 4.67 mmol) was dissolved in dichloromethane (10 mL). Benzyl chloroformate (1.19 g, 7.00 mmol), triethylamine (1.42 g, 14.0 mmol), and 4-dimethylaminopyridine (57.0 mg, 467 μmol) were added thereto, and the reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was added with water (20 mL) and extracted with dichloromethane (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 3/1, V/V) to obtain compound 17-2. MS-ESI calculated for [M-56+H]+293, found 293.
Compound 17-2 (1.15 g, 3.30 mmol) was dissolved in ethyl acetate (5 mL), and hydrogen chloride-ethyl acetate (4 mol/L, 10 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The reaction mixture was directly concentrated to obtain the hydrochloride of compound 17-3, which was directly used in the next step without purification. MS-ESI calculated for [M+H]+ 249, found 249.
The hydrochloride of compound 17-3 (820 mg, 3.30 mmol) was dissolved in dichloromethane (10 mL) and methanol (10 mL), and formaldehyde aqueous solution (804 mg, 9.91 mmol, purity: 37%), acetic acid (397 mg, 6.60 mmol), triethylamine (334 mg, 3.30 mmol), and sodium triacetoxyborohydride (2.10 g, 9.91 mmol) were added thereto, and the reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 17-4. MS-ESI calculated for [M+H]+ 263, found 263.
Compound 17-4 (600 mg, 2.29 mmol) was dissolved in tetrahydrofuran (3 mL), and the mixture was added with wet palladium/carbon (4.00 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. under hydrogen (15 Psi) atmosphere for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain compound 17-5. 1H NMR (400 MHz, CD3OD) δ 2.92-2.89 (m, 1H), 2.64 (s, 2H), 2.32-2.28 (m, 1H), 2.25 (s, 3H), 2.12-2.04 (m, 1H), 1.80-1.73 (m, 1H), 1.56-1.50 (m, 2H), 0.96 (d, J=6.8 Hz, 3H).
Compound 17-5 (220 mg, 1.72 mmol) was dissolved in 1,4-dioxane (5 mL), and then the reaction mixture was added with compound 2-2 (364 mg, 2.23 mmol), tris(dibenzylideneacetone)dipalladium (157 mg, 172 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (199 mg, 343 μmol), and cesium carbonate (1.68 g, 5.15 mmol). The system was replaced with nitrogen three times, and the reaction mixture was stirred at 110° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 17-6. MS-ESI calculated for [M+H]+ 255, found 255.
Compound 17-6 (80.0 mg, 314 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and intermediate A (40.8 mg, 157 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (23.0 mg, 31.4 μmol), and potassium carbonate (109 mg, 785 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (chromatographic column: Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 17. 1H NMR (400 MHz, CD3OD) δ 7.80 (s, 1H), 7.14 (d, J=7.6 Hz, 1H), 7.00 (d, J=7.6 Hz, 1H), 4.37 (s, 1H), 3.84 (d, J=13.2 Hz, 1H), 3.58 (d, J=13.2 Hz, 1H), 3.30-3.22 (m, 1H), 3.18-3.12 (m, 1H), 3.04-2.94 (m, 5H), 2.89 (s, 3H), 2.36 (s, 3H), 2.20-2.14 (m, 3H), 1.97-1.90 (m, 1H), 1.21-1.17 (m, 3H). MS-ESI calculated for [M+H]+ 353, found 353.
Synthetic Route:
Compound 16-1 (3.00 g, 13.5 mmol) and 1,1′-bis(di-tert-butylphosphino)ferrocene palladium dichloride dichloromethane (1.11 g, 1.35 mmol) were dissolved in anhydrous tetrahydrofuran (90.0 mL), and compound 18-1 (18.0 mL, 36.0 mmol, 2 mol/L tetrahydrofuran solution) was added dropwise thereto under nitrogen atmosphere. The reaction mixture was stirred at 60° C. for 12 hours under nitrogen atmosphere. The reaction mixture was quenched with saturated ammonium chloride aqueous solution (50 mL), extracted with ethyl acetate (50 mL×2), and the combined organic phases were washed with saturated brine (100 mL×1), dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 18-2. 1H NMR (400 MHz, CDCl3) δ 7.26 (d, J=8.0 Hz, 1H), 6.73-6.70 (m, 2H), 3.91 (s, 3H), 2.47 (d, J=7.2 Hz, 2H), 1.93-1.83 (m, 1H), 0.93 (d, J=6.8 Hz, 6H).
Compound 18-2 (100 mg, 0.503 mmol), bis(pinacolato)diboron (134 mg, 0.528 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (48.0 mg, 0.101 mmol), and sodium acetate (50.0 mg, 0.604 mmol) were dissolved in 1,4-dioxane (3 mL), and the reaction mixture was added with bis(dibenzylideneacetone)palladium (29.0 mg, 50.3 μmol) under nitrogen atmosphere, and the reaction was stirred at 80° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 18-3. 1H NMR (400 MHz, CDCl3) δ 7.61 (d, J=8.0 Hz, 1H), 6.76 (d, J=8.0 Hz, 1H), 6.66 (s, 1H), 3.85 (s, 3H), 2.49 (d, J=7.2 Hz, 2H), 1.94-1.84 (m, 1H), 1.37 (s, 12H), 0.92 (d, J=6.8 Hz, 6H).
Compound 2-3 (50.0 mg, 0.208 mmol), compound 18-3 (167 mg, 0.575 mmol), and potassium phosphate (88.2 mg, 0.415 mmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was added with 1,1′-bis(di-tert-butylphosphino)ferrocene palladium dichloride dichloromethane (17.0 mg, 20.8 μmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by thin-layer chromatography (dichloromethane/methanol/triethylamine, 5/1/0.002, V/V/V) to obtain compound 18-4. MS-ESI calculated for [M+H]+ 369, found 369.
Compound 18-4 (78.0 mg, 154 μmol) was dissolved in anhydrous dichloromethane (3.00 mL), and boron tribromide (116 mg, 461 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 1 hour. The reaction mixture was quenched with methanol (3.00 mL) at 0° C., and then concentrated under reduced pressure. The crude product was purified by preparative high performance liquid chromatography (YMC Triart 30×150 mm×7 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 23% to 43%, 9 min) to obtain the hydrochloride of compound 18. 1H NMR (400 MHz, CD3OD) δ 7.53 (s, 1H), 7.29-7.27 (m, 1H), 6.92-6.88 (m, 2H), 4.37-4.29 (m, 1H), 3.87-3.81 (m, 1H), 3.58-3.55 (m, 1H), 3.17-3.04 (m, 1H), 2.96-2.90 (m, 4H), 2.54 (d, J=8.0 Hz, 2H), 2.37-2.36 (m, 3H), 2.28-2.25 (m, 1H), 2.13-2.01 (m, 1H), 1.97-1.91 (m, 2H), 1.74-1.64 (m, 1H), 0.97 (d, J=6.4 Hz, 6H). MS-ESI calculated for [M+H]+ 355, found 355.
Synthetic Route:
Compound 12-4 (550 mg, 1.38 mmol) was dissolved in anhydrous tetrahydrofuran (4 mL), and the reaction mixture was added with compound 19-1 (0.21 mL, 2.77 mmol) under nitrogen atmosphere. The reaction mixture was stirred and reacted at 70° C. for 12 hours. Then the reaction system was cooled to 0° C. in an ice-water bath, and the system was added with sodium triacetoxyborohydride (880 mg, 4.15 mmol), heated to 70° C. and stirred for 1 hour. The reaction mixture was quenched with water (10 mL), extracted with ethyl acetate (10 mL×3), and the combined organic phases were washed with saturated brine (20 mL×1), dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane/methanol, 5/1 to 0/1, V/V) to obtain compound 19-2. MS-ESI calculated for [M+H]+ 415, found 415.
Compound 19-2 (101 mg, 0.36 mmol) and intermediate A (103 mg, 0.40 mmol) were dissolved in 1,4-dioxane (4 mL) and water (0.8 mL), and the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (26 mg, 36 μmol) and potassium carbonate (125 mg, 0.90 mmol) under nitrogen atmosphere. The reaction mixture was stirred and reacted at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (chromatographic column: Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 10% to 30%, 6 min) to obtain the hydrochloride of compound 19. 1H NMR (400 MHz, DMSO-d6) δ 10.75 (s, 1H), 9.43 (s, 1H), 6.99 (d, J=7.6 Hz, 1H), 6.79 (d, J=7.6 Hz, 2H), 4.71-4.15 (m, 1H), 3.66 (s, 1H), 2.96-2.76 (m, 4H), 2.33 (s, 2H), 2.17 (s, 2H), 2.09 (br s, 3H), 2.06-1.99 (m, 2H), 1.84-1.60 (m, 2H), 1.52 (s, 1H). MS-ESI calculated for [M+H]+ 379, found 379.
Synthetic Route:
To ethyl acetate (8 mL) was added copper bromide (2.81 g, 12.5 mmol), and the suspension was stirred at 80° C. for 10 minutes. Compound 20-1 (478 mg, 3.14 mmol) was dissolved in chloroform (8 mL), then the mixture was added into the above suspension, and the reaction mixture was stirred and reacted at 80° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with ethyl acetate (50 mL) and then filtered. The filtrate was washed with saturated sodium bicarbonate aqueous solution (50 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to obtain compound 20-2. 1H NMR (400 MHz, CDCl3) δ 7.50 (d, J=5.2 Hz, 1H), 7.19 (d, J=5.2 Hz, 1H), 3.18 (s, 4H). MS-ESI calculated for [M+H]+ 310, 311, 312, found 310, 311, 312.
Compound 20-2 (950 mg, 3.06 mmol) and lithium carbonate (1.36 g, 18.4 mmol) were dissolved in N,N-dimethylformamide (10.0 mL), and the mixture was stirred at 100° C. for 6 hours. The reaction mixture was filtered, then the pH of the filtrate was adjusted to 1 with hydrochloric acid aqueous solution (1.00 mol/L), and the mixture was extracted with ethyl acetate (50 mL×2). The combined organic phases were sequentially washed with water (60 mL×3) and saturated brine (100 mL×1), dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to obtain compound 20-3. 1H NMR (400 MHz, CDCl3) δ 7.43 (d, J=4.0 Hz, 1H), 7.33-7.32 (m, 1H), 7.31-7.30 (m, 1H), 7.27-7.25 (m, 1H), 5.79 (s, 1H).
Compound 20-3 (770 mg, 3.36 mmol) was dissolved in acetonitrile (10 mL), and the reaction mixture was added with potassium carbonate (929 mg, 6.72 mmol) and dimethyl sulfate (530 mg, 4.20 mmol), and the reaction was stirred at 60° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was dissolved in methanol (10 mL), and sodium hydroxide (1.0 g) was added thereto, and the mixture was stirred at room temperature for 1 hour to degrade excess dimethyl sulfate. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was dissolved in dichloromethane (50 mL), sequentially washed with water (50 mL×1) and saturated brine (50 mL×1), dried over anhydrous sodium sulfate, filtered, concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (petroleum ether/ethyl acetate, 5/1, V/V) to obtain compound 20-4. 1H NMR (400 MHz, CDCl3) δ 7.57-7.51 (m, 2H), 7.49-7.45 (m, 2H), 4.03 (s, 3H).
Compound 20-4 (445 mg, 1.83 mmol), bis(pinacolato)diboron (558 mg, 2.20 mmol), and potassium acetate (359 mg, 3.66 mmol) were dissolved in 1,4-dioxane (10.0 mL), and the reaction mixture was added with bis(triphenylphosphine)palladium(II) chloride (128 mg, 183 μmol) under nitrogen atmosphere, and the reaction was stirred at 90° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (10/1, petroleum ether/ethyl acetate, Rf=0.30) to obtain compound 20-5. 1H NMR (400 MHz, CDCl3) δ 7.61-7.59 (m, 1H), 7.55-7.53 (m, 1H), 7.43-7.41 (m, 1H), 7.29-7.27 (m, 1H), 3.93 (s, 3H), 1.31 (s, 12H). MS-ESI calculated for [M+H]+ 291, found 291.
Compound 20-5 (70.0 mg, 0.291 mmol), compound 2-3 (110 mg, 0.378 mmol), and potassium phosphate (123 mg, 0.581 mmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was added with 1,1′-bis(di-tert-butylphosphino)ferrocene palladium dichloride dichloromethane (23.8 mg, 29.1 μmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (dichloromethane/methanol/triethylamine, 5/1/0.02, V/V) to obtain compound 20-6. MS-ESI calculated for [M+H]+ 369, found 369.
Compound 20-6 (110 mg, 289 μmol) was dissolved in anhydrous dichloromethane (5.00 mL), and boron tribromide (217 mg, 866 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 12 hours. The reaction mixture was quenched with methanol (3.00 mL) at 0° C., and then concentrated under reduced pressure. The residue was purified by preparative high performance liquid chromatography (YMC Triart 30×150 mm×7 μm; mobile phase A: 0.05% hydrochloric acid aqueous solution; mobile phase B: acetonitrile; B %: 9% to 29%, 10 min) to obtain the hydrochloride of compound 20. 1H NMR (400 MHz, CD3OD) δ 7.61-7.59 (m, 1H), 7.56-7.55 (m, 2H), 7.52-7.29 (m, 1H), 7.22-7.19 (m, 1H), 4.27-4.21 (m, 1H), 3.78-3.71 (m, 1H), 3.46-3.43 (m, 1H), 3.07-2.93 (m, 2H), 2.85-2.80 (m, 3H), 2.26-2.24 (m, 3H), 2.17-2.09 (m, 1H), 2.04-1.92 (m, 2H), 1.88-1.56 (m, 1H). MS-ESI calculated for [M+H]+ 355, found 355.
Synthetic Route:
Compound 4-4 (600 mg, 1.83 mmol) was dissolved in dichloromethane (10 mL), cooled to 0° C. in an ice-water bath, and boron tribromide (0.53 mL, 5.48 mmol) was added thereto. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with water (10 mL), extracted with ethyl acetate (20 mL×3), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 21-1. 1H NMR (400 MHz, CD3OD) δ 7.59-7.51 (m, 3H), 7.13-7.08 (m, 2H), 7.03-7.01 (m, 1H), 6.94 (d, J=1.6 Hz, 1H).
Compound 21-1 (173 mg, 0.53 mmol) was dissolved in 1,4-dioxane (2 mL) and water (0.5 mL). Compound 13-2 (200 mg, 0.48 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (35 mg, 48 μmol), and potassium carbonate (166 mg, 1.20 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 21-2, which was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 43% to 73%, 8 min) to obtain compound 21-2. MS-ESI calculated for [M+H]+ 569, found 569.
Compound 21-2 (260 mg, 0.46 mmol) was dissolved in anhydrous tetrahydrofuran (20 mL), and the mixture was added with wet palladium/carbon (80 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 21. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 39% to 69%, 8 min) to obtain compound 21. 1H NMR (400 MHz, CD3OD) δ 7.72-7.61 (m, 2H), 7.61-7.50 (m, 1H), 7.30 (d, J=7.8 Hz, 1H), 7.23-7.15 (m, 2H), 7.14 (d, J=1.8 Hz, 1H), 6.80 (s, 1H), 4.74-4.65 (m, 3H), 4.62 (t, J=6.4 Hz, 1H), 4.18-4.14 (m, 1H), 3.57-3.50 (m, 1H), 2.93 (d, J=9.2 Hz, 1H), 2.54 (s, 1H), 2.19 (s, 3H), 2.10 (s, 1H), 1.99 (s, 2H), 1.86-1.82 (m, 1H), 1.77-1.62 (m, 1H), 1.55-1.45 (m, 1H).
Synthetic Route:
Compound 16-4 (500 mg, 1.82 mmol) was dissolved in dichloromethane (5 mL), cooled to 0° C. in an ice-water bath, and boron tribromide (0.35 mL, 3.65 mmol) was added thereto. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with water (10 mL), extracted with ethyl acetate (20 mL×3), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 22-1. 1H NMR (400 MHz, CDCl3) δ 7.82-7.59 (m, 1H), 6.96-6.82 (m, 1H), 6.71-6.62 (m, 1H), 1.96-1.82 (m, 1H), 1.09-0.97 (m, 2H), 0.80-0.75 (m, 2H).
Compound 22-1 (195 mg, 1.09 mmol) was dissolved in 1,4-dioxane (10 mL) and water (2 mL). Compound 13-2 (380 mg, 911 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (66.7 mg, 91.2 μmol), and potassium carbonate (315 mg, 2.28 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 22. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 33% to 63%, 8 min) to obtain compound 22. 1H NMR (400 MHz, CD3OD) δ 7.08 (d, J=8.0 Hz, 1H), 6.77 (s, 1H), 6.66 (d, J=8.0 Hz, 1H), 6.61 (s, 1H), 4.69-4.59 (m, 4H), 4.14-4.10 (m, 1H), 3.55-3.49 (m, 1H), 2.92-2.90 (m, 1H), 2.55-2.53 (m, 1H), 2.13 (s, 3H), 2.09-2.03 (m, 1H), 1.97 (s, 2H), 1.90-1.80 (m, 2H), 1.73-1.65 (m, 1H), 1.50-1.42 (m, 1H), 0.99-0.95 (m, 2H), 0.71-0.67 (m, 2H). MS-ESI calculated for [M+H]+ 381, found 381.
Synthetic Route:
Compound 12-5 (160 mg, 400 μmol) was dissolved in 1,4-dioxane (2 mL) and water (0.4 mL). Compound 22-1 (85.5 mg, 480 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (29.3 mg, 40.0 μmol), and potassium carbonate (138 mg, 1.00 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 23. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 37% to 67%, 8 min) to obtain compound 23. 1H NMR (400 MHz, CD3OD) δ 7.08 (d, J=8.0 Hz, 1H), 6.76 (s, 1H), 6.67 (d, J=8.0 Hz, 1H), 6.61 (s, 1H), 4.17-4.13 (m, 1H), 3.69 (s, 2H), 3.07-3.04 (m, 1H), 2.71-2.68 (m, 1H), 2.44 (t, J=8.8 Hz, 1H), 2.31 (t, J=8.8 Hz, 1H), 2.14 (s, 3H), 1.94-1.85 (m, 3H), 1.75-1.67 (m, 1H), 1.47-1.41 (m, 1H), 1.00-0.95 (m, 2H), 0.71-0.67 (m, 2H). MS-ESI calculated for [M+H]+ 364, found 364.
Synthetic Route:
Compound 16-1 (2.81 g, 12.7 mmol) and compound 24-1 (2.0 g, 15.9 mmol) were dissolved in 1,4-dioxane (50 mL) and water (10 mL), and the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (2.32 g, 2.77 mmol) and potassium carbonate (6.58 g, 47.6 mmol) under nitrogen atmosphere. The reaction mixture was stirred and reacted at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 24-2. 1H NMR (400 MHz, CD3OD) δ 7.26 (d, J=8.0 Hz, 1H), 6.97-6.81 (m, 2H), 6.12-6.01 (m, 1H), 3.96-3.84 (m, 3H), 2.44-2.30 (m, 2H), 2.26-2.11 (m, 2H), 1.83-1.72 (m, 2H), 1.70-1.59 (m, 2H).
Compound 24-2 (1.0 g, 4.49 mmol), bis(pinacolato)diboron (1.71 g, 6.74 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (428 mg, 0.90 mmol), and sodium acetate (737 mg, 8.98 mmol) were dissolved in 1,4-dioxane (10 mL), and the reaction mixture was added with bis(dibenzylideneacetone)palladium (258 mg, 0.45 mmol) under nitrogen atmosphere, and the reaction was stirred at 115° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 24-3. 1H NMR (400 MHz, CDCl3) δ 7.67-7.60 (m, 1H), 6.96 (dd, J=1.2, 7.8 Hz, 1H), 6.87 (d, J=1.2 Hz, 1H), 6.18-6.13 (m, 1H), 3.89-3.84 (m, 3H), 2.49-2.36 (m, 2H), 2.23-2.21 (m, 2H), 1.85-1.72 (m, 2H), 1.71-1.59 (m, 2H), 1.39-1.31 (m, 12H).
Compound 24-3 (1.5 g, 4.77 mmol) was dissolved in dichloromethane (100 mL), cooled to 0° C. in an ice-water bath, and boron tribromide (1.38 mL, 14.3 mmol) was added thereto. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with water (30 mL), extracted with ethyl acetate (300 mL×3), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 24-4. 1H NMR (400 MHz, CD3OD) δ 6.93-6.87 (m, 1H), 6.82-6.77 (m, 1H), 6.73-6.67 (m, 1H), 6.15 (s, 1H), 2.45-2.31 (m, 2H), 2.27-2.14 (m, 2H), 1.85-1.74 (m, 2H), 1.72-1.58 (m, 2H)
Compound 24-4 (157 mg, 0.72 μmol) and compound 13-2 (200 mg, 0.48 mmol) were dissolved in 1,4-dioxane (8 mL) and water (1.6 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (35 mg, 48 μmol) and potassium carbonate (199 mg, 1.44 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 24-5. MS-ESI calculated for [M+H]+ 555, found 555.
Compound 24-5 (200 mg, 0.36 mmol) was dissolved in anhydrous ethanol (20 mL), and the mixture was added with wet palladium/carbon (80 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude products of compound 24a and compound 24b. The crude products were separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 43% to 73%, 8 min) to obtain compound 24a and compound 24b.
Compound 24a: 1H NMR (400 MHz, CD3OD) δ 7.13 (d, J=7.8 Hz, 1H), 6.82 (d, J=8.0 Hz, 1H), 6.78 (s, 2H), 4.73-4.66 (m, 3H), 4.66-4.57 (m, 1H), 4.22-4.09 (m, 1H), 3.61-3.50 (m, 1H), 2.94 (d, J=9.2 Hz, 1H), 2.67-2.41 (m, 2H), 2.17 (s, 4H), 2.02 (s, 2H), 1.89 (s, 5H), 1.80-1.65 (m, 2H), 1.55-1.39 (m, 5H), 1.32 (d, J=10.0 Hz, 1H). MS-ESI calculated for [M+H]+ 423, found 423.
Compound 24b: 1H NMR (400 MHz, CD3OD) δ 7.17 (d, J=8.0 Hz, 1H), 7.01 (d, J=7.8 Hz, 1H), 6.96 (s, 1H), 6.89 (s, 1H), 6.19 (s, 1H), 4.76-4.67 (m, 3H), 4.67-4.59 (m, 2H), 4.20-4.06 (m, 1H), 3.62 (t, J=6.4 Hz, 1H), 2.98 (d, J=8.8 Hz, 1H), 2.62 (s, 1H), 2.43 (d, J=1.8 Hz, 2H), 2.25 (d, J=3.6 Hz, 2H), 2.19 (s, 3H), 2.07-2.03 (m, 2H), 1.91-1.79 (m, 3H), 1.78-1.65 (m, 3H), 1.53 (d, J=10.4 Hz, 1H). MS-ESI calculated for [M+H]+ 421, found 421.
Synthetic Route:
Compound 16-1 (3.80 g, 17.2 mmol), compound 25-1 (1.80 g, 18.0 mmol), and cesium carbonate (11.2 g, 34.3 mmol) were dissolved in toluene (50 mL) and water (5 mL), and the reaction mixture was added with 1,1′-bis(di-tert-butylphosphino)ferrocene palladium dichloride dichloromethane (1.40 g, 1.72 mmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20/1, petroleum ether/ethyl acetate, Rf=0.55) to obtain compound 25-2. 1H NMR (400 MHz, CDCl3) δ 7.30-7.28 (m, 1H), 6.79-6.77 (m, 2H), 3.93 (s, 3H), 3.58-3.50 (m, 1H), 2.41-2.34 (m, 2H), 2.20-2.10 (m, 2H), 2.08-1.98 (m, 1H), 1.91-1.84 (m, 1H).
Compound 25-2 (300 mg, 1.53 mmol), bis(pinacolato)diboron (426 mg, 1.68 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (145 mg, 0.305 mmol), and sodium acetate (150 mg, 1.83 mmol) were dissolved in 1,4-dioxane (6.00 mL), and the reaction mixture was added with bis(dibenzylideneacetone)palladium (87.7 mg, 152 μmol) under nitrogen atmosphere, and the reaction was stirred at 115° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20/1, petroleum ether/ethyl acetate, Rf=0.25) to obtain compound 25-3. 1H NMR (400 MHz, CDCl3) δ 7.64-7.63 (m, 1H), 6.83 (d, J=8.0 Hz, 1H), 6.71 (s, 1H), 3.86 (s, 3H), 3.61-3.52 (m, 1H), 2.40-2.32 (m, 2H), 2.22-2.12 (m, 2H), 2.09-2.02 (m, 1H), 1.91-1.83 (m, 1H), 1.36 (s, 12H).
Compound 25-3 (230 mg, 798 μmol) was dissolved in anhydrous dichloromethane (5.00 mL), and boron tribromide (400 mg, 1.60 mmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 0° C. for 0.5 hours. The reaction mixture was quenched with water (30.0 mL) at 0° C., extracted with dichloromethane (30 mL×2). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 25-4. 1H NMR (400 MHz, CD3OD) δ 7.50 (br s, 1H), 6.72-6.70 (m, 1H), 6.64 (s, 1H), 3.54-3.45 (m, 1H), 2.36-2.31 (m, 2H), 2.19-2.09 (m, 2H), 2.08-2.00 (m, 1H), 1.90-1.82 (m, 1H).
Compound 25-4 (60.0 mg, 0.312 mmol), compound 13-2 (100 mg, 0.240 mmol), and potassium carbonate (66.3 mg, 0.479 mmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was added with 1,1′-bis(di-t-butylphosphino)ferrocene palladium dichloride (17.6 mg, 24.0 μmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (Waters Xbridge 150×25 mm×5 μm; mobile phase A: 10 mmol/L ammonium bicarbonate aqueous solution; mobile phase B: acetonitrile; B %: 40% to 70%, 10 min) to obtain compound 25. 1H NMR (400 MHz, CD3OD) δ 7.14 (d, J=8.0 Hz, 1H), 6.82 (d, J=8.0 Hz, 1H), 6.79 (s, 2H), 4.71-4.68 (m, 2H), 4.64-4.62 (m, 4H), 4.18-4.12 (m, 1H), 3.60-3.52 (m, 2H), 2.94-2.92 (m, 1H), 2.59-2.56 (m, 1H), 2.41-2.34 (m, 2H), 2.21-2.18 (m, 1H), 2.16 (s, 3H), 2.13-2.08 (m, 1H), 2.06-2.00 (m, 2H), 1.93-1.83 (m, 2H), 1.76-1.68 (m, 1H), 1.54-1.45 (m, 1H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
Compound 20-5 (763 mg, 2.63 mmol) was dissolved in anhydrous dichloromethane (8.00 mL), and boron tribromide (1.32 g, 5.26 mmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 0° C. for 0.5 hours. The reaction mixture was quenched with water (30.0 mL) at 0° C., extracted with dichloromethane (30 mL×2). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (10/1, dichloromethane/methanol, Rf=0.40) to obtain compound 26-1. 1H NMR (400 MHz, CD3OD) δ 7.58-7.52 (m, 1H), 7.51-7.49 (m, 1H), 7.40-7.35 (m, 2H).
Compound 13-2 (120 mg, 0.288 mmol), compound 26-1 (100 mg, 0.515 mmol), and potassium carbonate (119 mg, 0.863 mmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was added with 1,1′-bis(di-t-butylphosphino)ferrocene palladium dichloride (21.1 mg, 28.8 μmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (Waters Xbridge 150×25 mm×5 μm; mobile phase A: 0.05% ammonia solution; mobile phase B: acetonitrile; B %: 22% to 50%, 9 min) to obtain compound 26. 1H NMR (400 MHz, CD3OD) δ 7.61 (d, J=4.0 Hz, 1H), 7.51-7.49 (m, 2H), 7.26 (d, J=8.0 Hz, 1H), 6.86 (s, 1H), 4.72-4.69 (m, 2H), 4.65-4.62 (m, 2H), 4.21-4.14 (m, 1H), 3.57-3.54 (m, 1H), 2.95-2.91 (m, 1H), 2.60-2.56 (m, 1H), 2.22 (s, 3H), 2.18-2.10 (m, 1H), 2.06-2.00 (m, 2H), 1.89-1.83 (m, 1H), 1.77-1.69 (m, 1H), 1.56-1.47 (m, 1H). MS-ESI calculated for [M+H]+ 397, found 397.
Synthetic Route:
Compound 27-1 (1.82 g, 16.3 mmol) was dissolved in 1,4-dioxane (20 mL) and water (4 mL). Compound 16-1 (3 g, 13.6 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (1.98 g, 2.71 mmol), and potassium carbonate (5.62 g, 40.6 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 27-2. 1H NMR (400 MHz, CDCl3) δ 7.29 (d, J=8.4 Hz, 1H), 7.00 (s, 1H), 6.97 (d, J=8.4 Hz, 1H), 6.19-6.18 (m, 1H), 3.93 (s, 3H), 2.72-2.68 (m, 2H), 2.57-2.52 (m, 2H), 2.08-2.00 (m, 2H).
Compound 27-2 (2.00 g, 9.58 mmol) was dissolved in 1,4-dioxane (30 mL), and bis(pinacolato)diboron (3.65 g, 14.4 mmol), sodium acetate (1.57 g, 19.2 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (914 mg, 1.92 mmol), and tris(dibenzylideneacetone)dipalladium (878 mg, 958 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 115° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 27-3. 1H NMR (400 MHz, CDCl3) δ 7.43 (d, J=2.4 Hz, 1H), 7.03-7.01 (m, 1H), 6.93 (s, 1H), 6.26-6.25 (m, 1H), 3.86 (s, 3H), 2.74-2.70 (m, 2H), 2.56-2.52 (m, 2H), 2.07-2.01 (m, 2H), 1.36 (s, 12H).
Compound 27-3 (2.50 g, 8.33 mmol) was dissolved in dichloromethane (30 mL), and boron tribromide (4.17 g, 16.7 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (10 mL) and extracted with ethyl acetate (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 27-4. 1H NMR (400 MHz, CD3OD) δ 7.53 (d, J=7.6 Hz, 1H), 6.95 (d, J=7.6 Hz, 1H), 6.82 (s, 1H), 6.22 (s, 1H), 2.69-2.65 (m, 2H), 2.54-2.49 (m, 2H), 2.05-2.00 (m, 2H).
Compound 27-4 (294 mg, 1.44 mmol) was dissolved in 1,4-dioxane (10 mL) and water (2 mL). Compound 13-2 (500 mg, 1.20 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (87.8 mg, 120 μmol), and potassium carbonate (414 mg, 3.00 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 27-5. MS-ESI calculated for [M+H]+ 541, found 541.
Compound 27-5 (360 mg, 666 μmol) was dissolved in tetrahydrofuran (10 mL), and the mixture was added with wet palladium/carbon (100 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude products of compound 27a and compound 27b. The crude products were separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 39% to 69%, 8 min) to obtain compound 27a and compound 27b.
Compound 27a: 1H NMR (400 MHz, CD3OD) δ 7.11 (d, J=8.0 Hz, 1H), 6.83 (dd, J=1.6, 8.0 Hz, 1H), 6.80 (d, J=1.2, 1H), 6.76 (d, J=1.2, 1H), 4.69-4.65 (m, 3H), 4.63-4.59 (m, 1H), 4.15-4.11 (m, 1H), 3.56-3.49 (m, 1H), 3.04-2.95 (m, 1H), 2.91-2.89 (m, 1H), 2.55-2.53 (m, 1H), 2.14 (s, 3H), 2.11-2.04 (m, 3H), 2.00-1.95 (m, 2H), 1.88-1.78 (m, 3H), 1.76-1.59 (m, 5H), 1.49-1.46 (m, 1H). MS-ESI calculated for [M+H]+ 409, found 409.
Compound 27b: 1H NMR (400 MHz, CD3OD) δ 7.16 (d, J=8.0 Hz, 1H), 7.06 (dd, J=1.2, 8.0 Hz, 1H), 6.99 (d, J=1.2 Hz, 1H), 6.77 (s, 1H), 6.24-6.22 (m, 1H), 4.70-4.66 (m, 4H), 4.17-4.11 (m, 1H), 3.56-3.50 (m, 1H), 2.93-2.89 (m, 1H), 2.73-2.69 (m, 2H), 2.57-2.52 (m, 3H), 2.15 (s, 3H), 2.08-1.98 (m, 5H), 1.85-1.81 (m, 1H), 1.72-1.62 (m, 1H), 1.49-1.47 (m, 1H). MS-ESI calculated for [M+H]+ 407, found 407.
Synthetic Route:
Compound 5-2 (0.5 g, 1.76 mmol) was dissolved in dichloromethane (100 mL), cooled to 0° C. in an ice-water bath, and boron tribromide (0.34 mL, 3.52 mmol) was added thereto. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with water (10 mL), extracted with ethyl acetate (20 mL×3), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 28-1. 1H NMR (400 MHz, DMSO-d6) δ 8.24-7.99 (m, 1H), 7.89-7.71 (m, 2H), 7.69-7.50 (m, 1H), 7.48-7.29 (m, 2H).
Compound 28-1 (100 mg, 0.53 μmol) and compound 13-2 (266 mg, 0.64 mmol) were dissolved in 1,4-dioxane (10 mL) and water (2 mL), and then the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (78 mg, 106 μmol) and potassium carbonate (220 mg, 1.60 mmol). The reaction mixture was heated to 100° C. and reacted for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 35% to 65%, 8 min) to obtain compound 28. 1H NMR (400 MHz, CD3OD) δ 8.41-8.26 (m, 1H), 7.89-7.77 (m, 1H), 7.53-7.47 (m, 2H), 7.46-7.35 (m, 2H), 6.88 (s, 1H), 4.75-4.67 (m, 3H), 4.65-4.59 (m, 1H), 4.25-4.14 (m, 1H), 3.58-3.52 (m, 1H), 2.93 (d, J=8.0 Hz, 1H), 2.56 (s, 1H), 2.28 (s, 3H), 2.12 (s, 1H), 2.07-1.93 (m, 2H), 1.87-1.84 (m, 1H), 1.77-1.69 (m, 1H), 1.52-1.51 (m, 1H). MS-ESI calculated for [M+H]+ 391, found 391.
Synthetic Route:
Compound 29-1 (2.0 g, 13.6 mmol) was dissolved in 1,4-dioxane (40 mL) and water (8 mL). Compound 16-1 (3.0 g, 13.6 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (1.99 g, 2.72 mmol), and potassium carbonate (5.64 g, 40.8 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 29-2. 1H NMR (400 MHz, CDCl3) δ 7.82-7.72 (m, 2H), 7.71-7.59 (m, 2H), 7.47 (d, J=7.8 Hz, 1H), 7.15-7.06 (m, 2H), 3.99 (s, 3H).
Compound 29-2 (2.00 g, 8.21 mmol) was dissolved in 1,4-dioxane (20 mL), and bis(pinacolato)diboron (3.13 g, 12.3 mmol), sodium acetate (1.35 g, 16.4 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (783 mg, 1.64 mmol), and tris(dibenzylideneacetone)dipalladium (472 mg, 821 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 115° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 29-3. 1H NMR (400 MHz, CDCl3) δ 7.80 (d, J=7.6 Hz, 1H), 7.76-7.67 (m, 4H), 7.19-7.17 (m, 1H), 7.04 (d, J=1.2 Hz, 1H), 3.93 (s, 3H), 1.44-1.36 (m, 12H).
Compound 29-3 (2.50 g, 7.46 mmol) was dissolved in dichloromethane (30 mL), and boron tribromide (2.16 mL, 22.4 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (40 mL) and extracted with ethyl acetate (40 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 29-4. 1H NMR (400 MHz, DMSO-d6) δ 7.93-7.83 (m, 4H), 7.77 (d, J=7.6 Hz, 1H), 7.2 (dd, J=1.6, 8.0 Hz, 1H), 7.13-7.08 (m, 1H).
Compound 29-4 (104 mg, 0.44 mmol) was dissolved in 1,4-dioxane (10 mL) and water (2 mL). Compound 13-2 (219 mg, 0.53 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (64 mg, 88 μmol), and potassium carbonate (182 mg, 1.32 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 29-5. MS-ESI calculated for [M+H]+ 590, found 590.
Compound 29-5 (263 mg, 0.46 mmol) was dissolved in anhydrous tetrahydrofuran (20 mL), and the mixture was added with wet palladium/carbon (80 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 21. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 34% to 64%, 8 min) to obtain compound 29. 1H NMR (400 MHz, CD3OD) δ 7.84 (d, J=1.0 Hz, 4H), 7.42-7.35 (m, 1H), 7.31-7.27 (m, 1H), 7.23 (d, J=1.6 Hz, 1H), 6.82 (s, 1H), 4.75-4.66 (m, 3H), 4.66-4.54 (m, 1H), 4.24-4.10 (m, 1H), 3.58-3.52 (m, 1H), 2.94 (d, J=9.2 Hz, 1H), 2.56 (s, 1H), 2.20 (s, 3H), 2.12 (s, 1H), 2.01 (s, 2H), 1.84 (d, J=3.8 Hz, 1H), 1.78-1.65 (m, 1H), 1.52 (s, 1H). MS-ESI calculated for [M+H]+ 442, found 442.
Synthetic Route:
The hydrochloride of compound 12-4 (300 mg, 755 μmol) was dissolved in tetrahydrofuran (10 mL), and tetrahydrofuran-3-one (195 mg, 2.27 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (320 mg, 1.51 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 1 hour. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 30-1. MS-ESI calculated for [M+H]+ 431, found 431.
Compound 30-1 (160 mg, 371 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Compound 22-1 (79.3 mg, 446 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (27.2 mg, 37.1 μmol), and potassium carbonate (128 mg, 928 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 30-2. MS-ESI calculated for [M+H]+ 529, found 529.
Compound 30-2 (120 mg, 227 μmol) was dissolved in tetrahydrofuran (5 mL), and the mixture was added with wet palladium/carbon (50.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 1. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 35% to 65%, 8 min) to obtain compound 30. 1H NMR (400 MHz, CD3OD) δ 7.07 (d, J=7.6 Hz, 1H), 6.74 (s, 1H), 6.66 (dd, J=1.6, 7.6 Hz, 1H), 6.61 (d, J=1.6 Hz, 1H), 4.11-4.07 (m, 1H), 3.95-3.83 (m, 2H), 3.77-3.58 (m, 3H), 3.16-2.97 (m, 2H), 2.79-2.62 (m, 1H), 2.29-2.19 (m, 1H), 2.13 (s, 3H), 2.10-2.04 (m, 2H), 2.00-1.97 (m, 1H), 1.91-1.84 (m, 2H), 1.82-1.76 (m, 1H), 1.72-1.63 (m, 1H), 1.03-0.91 (m, 2H), 0.70-0.66 (m, 2H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
The hydrochloride of compound 12-4 (300 mg, 755 μmol) was dissolved in tetrahydrofuran (10 mL), and tetrahydropyran-4-one (227 mg, 2.27 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (320 mg, 1.51 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 1 hour. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 31-1. MS-ESI calculated for [M+H]+ 445, found 445.
Compound 31-1 (200 mg, 449 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Compound 22-1 (96.0 mg, 539 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (32.9 mg, 45.0 μmol), and potassium carbonate (155 mg, 1.12 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 31-2. MS-ESI calculated for [M+H]+ 543, found 543.
Compound 31-2 (74.0 mg, 136 μmol) was dissolved in tetrahydrofuran (5 mL), and the mixture was added with wet palladium/carbon (50.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 2. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 38% to 68%, 8 min) to obtain compound 31. 1H NMR (400 MHz, CD3OD) δ 7.08 (d, J=8.0 Hz, 1H), 6.74 (d, J=1.6 Hz, 1H), 6.67 (dd, J=1.6, 8.0 Hz, 1H), 6.61 (d, J=1.6 Hz, 1H), 4.11-4.06 (m, 1H), 4.00-3.97 (m, 2H), 3.43-3.37 (m, 2H), 3.20-3.13 (m, 1H), 2.85-2.82 (m, 1H), 2.61-2.54 (m, 1H), 2.36 (t, J=9.6 Hz, 1H), 2.23 (t, J=9.6 Hz, 1H), 2.13 (s, 3H), 2.03-1.98 (m, 1H), 1.91-1.86 (m, 1H), 1.85-1.79 (m, 3H), 1.72-1.54 (m, 3H), 1.45-1.41 (m, 1H), 0.99-0.93 (m, 2H), 0.71-0.67 (m, 2H). MS-ESI calculated for [M+H]+ 409, found 409.
Synthetic Route:
The hydrochloride of compound 12-4 (500 mg, 1.26 mmol) was dissolved in tetrahydrofuran (8 mL), and tetrahydropyran-4-one (287 mg, 2.52 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 3 hours. Then sodium triacetoxyborohydride (533 mg, 2.52 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 1 hour. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 32-1. MS-ESI calculated for [M+H]+ 459, found 459.
Compound 32-1 (400 mg, 872 μmol) was dissolved in dioxane (5 mL) and water (1 mL), and intermediate C (186 mg, 1.05 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (63.8 mg, 87.2 μmol), and potassium carbonate (301 mg, 2.18 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 32-2. MS-ESI calculated for [M+H]+ 543, found 543.
Compound 32-2 (200 mg, 359 μmol) was dissolved in tetrahydrofuran (5 mL), and the mixture was added with wet palladium/carbon (50.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 65° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 3. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 43% to 73%, 8 min) to obtain compound 32. 1H NMR (400 MHz, CD3OD) δ 7.08 (d, J=8.0 Hz, 1H), 6.75 (s, 1H), 6.66 (dd, J=1.6, 8.0 Hz, 1H), 6.61 (s, 1H), 4.10-4.06 (m, 1H), 3.93-3.90 (m, 2H), 3.44-3.37 (m, 2H), 2.94 (s, 1H), 2.62 (s, 1H), 2.23-2.13 (m, 7H), 1.91-1.64 (m, 7H), 1.44-1.42 (m, 1H), 1.29-1.19 (m, 2H), 0.99-0.95 (m, 2H), 0.75-0.67 (m, 2H). MS-ESI calculated for [M+H]+ 423, found 423.
Synthetic Route:
Compound 33-1 (1.00 g, 5.65 mmol) was dissolved in dichloromethane (8 mL), and boron tribromide (2.83 g, 11.3 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with water (10 mL), extracted with dichloromethane (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 33-2. 1H NMR (400 MHz, CDCl3) δ 7.64 (s, 1H), 7.14 (dd, J=1.2, 7.6 Hz, 1H), 7.05 (s, 1H).
Compound 33-2 (164 mg, 1.01 mmol) was dissolved in dioxane (5 mL) and water (1 mL). Compound 13-2 (350 mg, 840 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (61.4 mg, 84.0 μmol), and potassium carbonate (290 mg, 2.10 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 33-3. MS-ESI calculated for [M+H]+ 500, found 500.
Compound 33-3 (400 mg, 801 μmol) was dissolved in tetrahydrofuran (10 mL), and the mixture was added with wet palladium/carbon (40.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 25° C. and a pressure of 15 Psi for 12 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 33. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenex C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 15% to 45%, 8 min) to obtain compound 33. 1H NMR (400 MHz, CD3OD) δ 7.31 (d, J=7.2 Hz, 1H), 7.14-7.11 (m, 2H), 6.77 (s, 1H), 4.69-4.65 (m, 3H), 4.61 (t, J=6.4 Hz, 1H), 4.16-4.12 (m, 1H), 3.55-3.49 (m, 1H), 2.92-2.90 (m, 1H), 2.53 (s, 1H), 2.13 (s, 3H), 2.08-1.94 (m, 3H), 1.84-1.81 (m, 1H), 1.74-1.65 (m, 1H), 1.48-1.41 (m, 1H). MS-ESI calculated for [M+H]+ 366, found 366.
Synthetic Route:
Compound 34-1 (89.4 mg, 0.639 mmol), compound 4-1 (200 mg, 0.639 mmol), potassium phosphate (271 mg, 1.28 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (52.2 mg, 63.9 μmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was stirred at 80° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by thin-layer chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 34-2. 1H NMR (400 MHz, CDCl3) δ 7.53 (d, J=8.0 Hz, 1H), 7.38-7.33 (m, 1H), 7.30-7.24 (m, 1H), 7.16-7.12 (m, 1H), 7.11-7.06 (m, 1H), 7.01-7.00 (m, 1H), 6.95-6.93 (m, 1H), 3.87 (s, 3H).
Compound 34-2 (163 mg, 580 μmol), bis(pinacolato)diboron (177 mg, 696 μmol), potassium acetate (114 mg, 1.16 mmol), and bis(triphenylphosphine)palladium(II) chloride (40.7 mg, 58.0 μmol) were dissolved in 1,4-dioxane (5 mL), and the system was replaced with nitrogen three times. The reaction mixture was stirred at 90° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by thin-layer chromatography (petroleum ether/ethyl acetate, 10/1, V/VO) to obtain compound 34-3. 1H NMR (400 MHz, CDCl3) δ 7.78 (d, J=7.6 Hz, 1H), 7.50-7.46 (m, 1H), 7.38-7.32 (m, 1H), 7.25-7.21 (m, 1H), 7.19-7.14 (m, 2H), 7.07 (s, 1H), 3.90 (s, 3H), 1.39 (s, 12H).
Compound 34-3 (144 mg, 439 μmol) was dissolved in dichloromethane (5 mL), and boron tribromide (84.6 μL, 878 μmol) was added dropwise thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with ice water (30 mL), extracted with dichloromethane (30 mL×2), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 34-4. 1H NMR (400 MHz, CD3OD) δ 7.69 (d, J=4.4 Hz, 1H), 7.50-7.46 (m, 1H), 7.38-7.36 (m, 1H), 7.27-7.23 (m, 1H), 7.21-7.16 (m, 1H), 7.04-6.98 (m, 2H).
Compound 34-4 (100 mg, 0.431 mmol), compound 13-2 (120 mg, 0.288 mmol), potassium carbonate (119 mg, 0.864 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (21.1 mg, 28.8 μmol) were dissolved in 1,4-dioxane (5 mL) and water (1 mL), and the reaction mixture was stirred at 110° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (dichloromethane/methanol, 10/1, V/V) and preparative high performance liquid chromatography (Waters Xbridge 150×25 mm×5 μm; mobile phase A: 10 mmol/L ammonium bicarbonate aqueous solution; mobile phase B: acetonitrile; B %: 37% to 67%, 10 min) to obtain compound 34. 1H NMR (400 MHz, CD3OD) δ 7.55-7.51 (m, 1H), 7.42-7.37 (m, 1H), 7.33-7.31 (m, 1H), 7.30-7.26 (m, 1H), 7.24-7.19 (m, 1H), 7.16-7.14 (m, 2H), 6.82 (d, J=0.8 Hz, 1H), 4.72-4.69 (m, 3H), 4.65-4.59 (m, 1H), 4.21-4.14 (m, 1H), 3.59-3.52 (m, 1H), 2.96-2.93 (m, 1H), 2.58-2.56 (m, 1H), 2.22 (d, J=0.8 Hz, 3H), 2.14-2.10 (m, 1H), 2.03-2.01 (m, 2H), 1.88-1.83 (m, 1H), 1.77-1.67 (m, 1H), 1.55-1.45 (m, 1H). MS-ESI calculated for [M+H]+ 435, found 435.
Synthetic Route:
Compound 35-1 (999 mg, 6.39 mmol), compound 4-1 (2 g, 6.39 mmol), potassium phosphate (2.71 g, 12.8 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (522 mg, 0.639 mmol) were dissolved in 1,4-dioxane (20 mL) and water (2 mL), and the reaction mixture was stirred at 80° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20/1, V/V) to obtain compound 35-2. 1H NMR (400 MHz, CDCl3) δ 7.61 (d, J=8.4 Hz, 1H), 7.52-7.50 (m, 2H), 7.45-7.42 (m, 2H), 7.06-7.02 (m, 2H), 3.99 (s, 3H).
Compound 35-2 (1.78 g, 5.98 mmol), bis(pinacolato)diboron (1.82 g, 7.18 mmol), potassium acetate (1.17 g, 12.0 mmol), and bis(triphenylphosphine)palladium(II) chloride (420 mg, 0.598 mmol) were dissolved in 1,4-dioxane (30 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 10/1, V/V) to obtain compound 35-3. 1H NMR (400 MHz, CDCl3) δ 7.77 (d, J=7.6 Hz, 1H), 7.56-7.54 (m, 2H), 7.44-7.42 (m, 2H), 7.17-7.14 (m, 1H), 7.03 (d, J=1.2 Hz, 1H), 3.93 (s, 3H), 1.39 (s, 12H).
Compound 35-3 (800 mg, 2.32 mmol) was dissolved in dichloromethane (8 mL), and boron tribromide (447 μL, 4.64 mmol) was added dropwise thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was quenched with ice water (30 mL), extracted with dichloromethane (30 mL×2), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 35-4. 1H NMR (400 MHz, CD3OD) δ 7.71-7.67 (m, 1H), 7.64-7.58 (m, 2H), 7.46-7.42 (m, 2H), 7.11-7.09 (m, 1H), 7.02 (d, J=1.6 Hz, 1H).
Compound 35-4 (100 mg, 0.402 mmol), compound 13-2 (150 mg, 0.360 mmol), potassium carbonate (149 mg, 1.08 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (26.3 mg, 36.0 μmol) were dissolved in 1,4-dioxane (6 mL) and water (1 mL), and the reaction mixture was stirred at 110° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 10/1, V/V) to obtain the crude product. Then the crude product was purified by preparative high performance liquid chromatography (Waters Xbridge 150×25 mm×5 μm; mobile phase A: 10 mmol/L ammonium bicarbonate aqueous solution; mobile phase B: acetonitrile; B %: 42% to 72%, 7 min) to obtain compound 35. 1H NMR (400 MHz, CD3OD) δ 7.66-7.64 (m, 2H), 7.48-7.46 (m, 2H), 7.33-7.31 (m, 1H), 7.23-7.21 (m, 1H), 7.16 (d, J=0.8 Hz, 1H), 6.81 (s, 1H), 4.72-4.69 (m, 3H), 4.65-4.62 (m, 1H), 4.21-4.14 (m, 1H), 3.57-3.52 (m, 1H), 2.96-2.92 (m, 1H), 2.58-2.56 (m, 1H), 2.20 (s, 3H), 2.13-2.11 (m, 1H), 2.06-1.94 (m, 2H), 1.88-1.82 (m, 1H), 1.77-1.65 (m, 1H), 1.56-1.46 (m, 1H). MS-ESI calculated for [M+H]+ 451, found 451.
Synthetic Route:
Compound 36-1 (447 mg, 3.20 mmol) was dissolved in 1,4-dioxane (15 mL) and water (1.5 mL). Compound 4-1 (1.0 g, 3.20 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (261 mg, 0.32 mmol), and potassium phosphate (1.36 g, 6.40 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 80° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 36-2. 1H NMR (400 MHz, CDCl3) δ 7.62 (d, J=8.0 Hz, 1H), 7.49-7.39 (m, 1H), 7.38-7.33 (m, 1H), 7.30-7.26 (m, 1H), 7.13-7.03 (m, 3H), 3.99 (s, 3H).
Compound 36-2 (925 mg, 3.29 mmol), bis(pinacolato)diboron (1.0 g, 3.95 mmol), potassium acetate (646 mg, 6.58 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (231 mg, 0.33 mmol) were dissolved in dioxane (15 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to obtain compound 36-3. 1H NMR (400 MHz, CDCl3) δ 7.76-7.72 (m, 1H), 7.68 (d, J=7.6 Hz, 1H), 7.52 (d, J=8.0 Hz, 1H), 7.11-7.05 (m, 3H), 6.87-6.82 (m, 1H), 3.89 (s, 3H), 1.29 (s, 12H).
Compound 36-3 (674 mg, 2.05 mmol) was dissolved in dichloromethane (10 mL), and boron tribromide (0.4 mL, 4.11 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (20 mL) and extracted with ethyl acetate (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 36-4. 1H NMR (400 MHz, CD3OD) δ 7.71 (s, 1H), 7.51-7.42 (m, 2H), 7.39-7.31 (m, 1H), 7.13 (dd, J=1.6, 7.8 Hz, 1H), 7.11-7.06 (m, 1H), 7.05 (d, J=1.6 Hz, 1H).
Compound 36-4 (114 mg, 0.49 mmol) was dissolved in 1,4-dioxane (4 mL) and water (0.4 mL). Compound 13-2 (157 mg, 0.38 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (28 mg, 38 μmol), and potassium carbonate (104 mg, 0.76 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 110° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 36-5. MS-ESI calculated for [M+H]+ 569, found 569.
Compound 36-5 (200 mg, 359 μmol) was dissolved in methanol (1 mL), and the mixture was added with wet palladium/carbon (5.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 80° C. and a pressure of 15 Psi for 24 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 3. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Waters Xbridge 150×25 mm×5 μm; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 38% to 68%, 10 min) to obtain compound 36. 1H NMR (400 MHz, CD3OD) δ 7.53-7.45 (m, 2H), 7.40-7.38 (m, 1H), 7.33 (d, J=8.0 Hz, 1H), −7.24 (dd, J=1.8, 8.0 Hz, 1H), 7.18 (d, J=1.6 Hz, 1H), 7.13-7.08 (m, 1H), 6.82 (s, 1H), 4.73-4.66 (m, 3H), 4.65-4.58 (m, 1H), 4.18 (s, 1H), 3.65-3.50 (m, 1H), 2.94 (s, 1H), 2.56 (s, 1H), 2.21 (s, 3H), 2.12 (s, 1H), 2.00 (s, 2H), 1.90-1.80 (m, 1H), 1.78-1.65 (m, 1H), 1.55-1.40 (m, 1H). MS-ESI calculated for [M+H]+ 435, found 435.
Synthetic Route:
Compound 37-1 (434 mg, 3.20 mmol) was dissolved in 1,4-dioxane (15 mL) and water (1.5 mL). Compound 4-1 (1.0 g, 3.20 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (261 mg, 0.32 mmol), and potassium phosphate (1.36 g, 6.40 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 80° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 37-2. 1H NMR (400 MHz, CDCl3) δ 7.48 (d, J=8.1 Hz, 1H), 7.41-7.35 (m, 2H), 7.20-7.13 (m, 2H), 6.99 (d, J=2.0 Hz, 1H), 6.95 (dd, J=2.1, 8.1 Hz, 1H), 3.86 (s, 3H), 2.31 (s, 3H).
Compound 37-2 (200 mg, 0.72 mmol), bis(pinacolato)diboron (220 mg, 0.87 mmol), potassium acetate (141 mg, 1.44 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (50 mg, 0.07 mmol) were dissolved in dioxane (5 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to obtain compound 37-3. 1H NMR (400 MHz, CDCl3) δ=7.76 (d, J=7.6 Hz, 1H), 7.52 (d, J=8.2 Hz, 2H), 7.26 (s, 2H), 7.18 (dd, J=1.4, 7.6 Hz, 1H), 7.07 (d, J=1.2 Hz, 1H), 3.92 (s, 3H), 2.42 (s, 3H), 1.38 (s, 12H).
Compound 37-3 (200 mg, 0.62 mmol) was dissolved in dichloromethane (2 mL), and boron tribromide (0.1 mL, 1.23 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (20 mL) and extracted with ethyl acetate (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 37-4.
Compound 37-4 (120 mg, 0.53 mmol) was dissolved in 1,4-dioxane (4 mL) and water (0.4 mL). Compound 13-2 (146 mg, 0.35 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (26 mg, 35 μmol), and potassium carbonate (97 mg, 0.7 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 110° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 37-5. MS-ESI calculated for [M+H]+ 565, found 565.
Compound 37-5 (90 mg, 159 μmol) was dissolved in methanol (1 mL), and the mixture was added with wet palladium/carbon (5.0 mg, purity: 10%), replaced with hydrogen three times. The reaction mixture was stirred at 80° C. and a pressure of 15 Psi for 24 hours. The reaction mixture was filtered, and the filtrate was directly concentrated under reduced pressure to obtain the crude product of compound 3. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Waters Xbridge 150×25 mm×5 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 33% to 63%, 9 min) to obtain compound 37. 1H NMR (400 MHz, CD3OD) δ 7.54 (d, J=8.0 Hz, 2H), 7.29 (t, J=7.0 Hz, 3H), 7.23-7.19 (m, 1H), 7.16 (d, J=1.6 Hz, 1H), 6.81 (s, 1H), 4.74-4.64 (m, 4H), 4.18 (d, J=4.6 Hz, 1H), 3.55 (t, J=6.6 Hz, 1H), 2.98-2.90 (m, 1H), 2.62-2.52 (m, 1H), 2.40 (s, 3H), 2.21 (s, 3H), 2.18-2.08 (m, 1H), 2.05-1.95 (m, 2H), 1.92-1.80 (m, 1H), 1.78-1.68 (m, 1H), 1.58-1.46 (m, 1H). MS-ESI calculated for [M+H]+ 431, found 431.
Synthetic Route:
Compound 12-2 (1.7 g, 5.20 mmol) was dissolved in ethyl acetate (5 mL), then 4 M hydrogen chloride/ethyl acetate solution (10 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The reaction mixture was directly concentrated to obtain the hydrochloride of compound 38-1. 1H NMR (400 MHz, CD3OD) δ 7.56 (s, 1H), 4.25-4.18 (m, 1H), 3.62-3.58 (m, 1H), 3.40-3.35 (m, 1H), 3.18-3.10 (m, 2H), 2.49 (s, 3H), 2.26-2.22 (m, 1H), 2.18-2.10 (m, 1H), 2.04-1.93 (m, 1H), 1.86-1.76 (m, 1H). MS-ESI calculated for [M+H]+ 227, found 227.
The hydrochloride of compound 38-1 (250 mg, 950 μmol) was dissolved in tetrahydrofuran (5 mL), and cyclobutanone (133 mg, 1.90 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (403 mg, 1.90 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 38-2. MS-ESI calculated for [M+H]+ 281, found 281.
Compound 38-2 (60.0 mg, 214 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate 26-1 (50.0 mg, 256 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (15.6 mg, 21.4 μmol), and potassium carbonate (73.8 mg, 534 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 38. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 45% to 75%, 8 min) to obtain compound 38. MS-ESI calculated for [M+H]+ 395, found 395. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.6 Hz, 1H), 7.50-7.49 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.81 (s, 1H), 4.59 (s, 1H), 4.20-4.13 (m, 1H), 3.22 (s, 1H), 3.03 (s, 1H), 2.86 (s, 1H), 2.20 (s, 3H), 2.13-1.87 (m, 7H), 1.80-1.71 (m, 3H), 1.49-1.47 (m, 1H).
Synthetic Route:
The hydrochloride of compound 38-1 (250 mg, 950 μmol) was dissolved in tetrahydrofuran (5 mL), and acetone (110 mg, 1.90 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (403 mg, 1.90 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 39-1. MS-ESI calculated for [M+H]+ 269, found 269.
Compound 39-1 (60.0 mg, 223 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate 26-1 (47.6 mg, 246 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (16.3 mg, 22.3 μmol), and potassium carbonate (77.1 mg, 558 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 39. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 m; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 44% to 74%, 8 min) to obtain compound 39. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.6 Hz, 1H), 7.50-7.49 (m, 2H), 7.24 (d, J=8.0 Hz, 1H), 6.83 (s, 1H), 4.59 (s, 1H), 4.21-4.16 (m, 1H), 3.03-2.94 (m, 2H), 2.55-2.43 (m, 2H), 2.20 (s, 3H), 2.08-2.06 (m, 1H), 1.94-1.90 (m, 1H), 1.81-1.72 (m, 1H), 1.54-1.45 (m, 1H), 1.18 (d, J=1.6 Hz, 3H), 1.16 (d, J=1.6 Hz, 3H). MS-ESI calculated for [M+H]+ 383, found 383.
Synthetic Route:
The hydrochloride of compound 38-1 (300 mg, 1.14 mmol) was dissolved in tetrahydrofuran (5 mL), and cyclopropanecarboxaldehyde (160 mg, 2.28 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (483 mg, 2.28 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 40-1. MS-ESI calculated for [M+H]+ 281, found 281.
Compound 40-1 (60.0 mg, 214 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and intermediate 26-1 (45.6 mg, 235 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (15.6 mg, 21.4 μmol), and potassium carbonate (73.8 mg, 534 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 40. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 44% to 74%, 8 min) to obtain compound 40. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.6 Hz, 1H), 7.50-7.49 (m, 2H), 7.24 (d, J=8.0 Hz, 1H), 6.83 (s, 1H), 4.24-4.20 (m, 1H), 4.60 (s, 2H), 3.44 (br s, 1H), 3.09 (br s, 1H), 2.56-2.37 (m, 2H), 2.20 (s, 3H), 2.11-2.08 (m, 1H), 1.94-1.91 (m, 1H), 1.82-1.76 (m, 1H), 1.52-1.50 (m, 1H), 0.99-0.97 (m, 1H), 0.64-0.59 (m, 2H), 0.26-0.22 (m, 2H). MS-ESI calculated for [M+H]+ 395, found 395.
Synthetic Route:
The hydrochloride of compound 12-4 (250 mg, 629 μmol) was dissolved in dichloromethane (5 mL). Triethylamine (191 mg, 1.89 mmol) and cyclopropanecarbonyl chloride (132 mg, 1.26 mmol) were added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 0/1, V/V) to obtain compound 41-1. MS-ESI calculated for [M+H]+ 429, found 429.
Compound 41-1 (120 mg, 280 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and intermediate 26-1 (59.7 mg, 308 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (20.5 mg, 28.0 μmol), and potassium carbonate (96.7 mg, 699 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 41. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 28% to 58%, 8 min) to obtain compound 41. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.2 Hz, 1H), 7.50-7.46 (m, 2H), 7.26 (d, J=8.2 Hz, 1H), 6.95 (s, 1H), 4.06-3.90 (m, 3H), 3.47-3.36 (m, 1H), 2.24 (s, 3H), 2.19-2.13 (m, 1H), 1.93-1.88 (m, 2H), 1.81-1.72 (m, 1H), 1.70-1.61 (m, 1H), 1.29 (s, 1H), 0.92-0.88 (m, 2H), 0.81-0.79 (m, 2H). MS-ESI calculated for [M+H]+ 409, found 409.
Synthetic Route:
The hydrochloride of compound 38-1 (240 mg, 912 μmol) and compound 42-1 (120 mg, 1.39 mmol) were dissolved in tetrahydrofuran (6 mL). The reaction mixture was stirred at 70° C. for 12 hours, and cooled to 0° C., and sodium triacetoxyborohydride (387 mg, 1.82 mmol) was added thereto. The reaction mixture was stirred at 25° C. for 1 hour and then at 70° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 42-2. MS-ESI calculated for [M+H]+ 297, found 297.
Compound 42-2 (80 mg, 0.149 mmol), compound 26-1 (70 mg, 0.361 mmol), potassium carbonate (61.8 mg, 0.447 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (21.8 mg, 29.8 μmol) were dissolved in N,N-dimethylformamide (5 mL) and water (1 mL), and the reaction mixture was stirred and reacted at 110° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (Phenomenex C18 75×30 mm×3 μm; mobile phase A: 0.225% formic acid aqueous solution; mobile phase B: acetonitrile; B %: 2% to 32%, 2 min) to obtain the formate of compound 42. 1H NMR (400 MHz, CD3OD) δ 8.43 (s, 1H), 7.62 (d, J=5.6 Hz, 1H), 7.54-7.52 (m, 2H), 7.25 (d, J=8.0 Hz, 1H), 6.89 (s, 1H), 4.27-4.22 (m, 1H), 4.04-3.98 (m, 1H), 3.95-3.84 (m, 2H), 3.78-3.72 (m, 1H), 3.57-3.38 (m, 2H), 3.12-2.98 (m, 1H), 2.74-2.68 (m, 1H), 2.65-2.58 (m, 1H), 2.29-2.25 (m, 1H), 2.22 (s, 3H), 2.11-2.03 (m, 2H), 2.02-1.96 (m, 1H), 1.87-1.78 (m, 1H), 1.66-1.58 (m, 1H). MS-ESI calculated for [M+H]+ 411, found 411.
Synthetic Route:
Compound 20-4 (4.19 g, 24.7 mmol) was dissolved in tetrahydrofuran (50 mL), and a mixed solution of lithium diisopropylamide 2M tetrahydrofuran in n-heptane (17.2 mL, 34.5 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with iodomethane (23.4 g, 74.0 mmol), stirred at 25° C. for 12 hours. The reaction mixture was added with water (50 mL) and extracted with ethyl acetate (50 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 20/1, V/V) to obtain compound 43-1. 1H NMR (400 MHz, CDCl3) δ 7.41-7.32 (m, 2H), 7.10 (s, 1H), 3.97 (s, 3H), 2.61 (d, J=1.0 Hz, 3H).
Compound 43-1 (3.7 g, 14.4 mmol) was dissolved in dioxane (100 mL), and bis(pinacolato)diboron (5.48 g, 21.6 mmol), potassium acetate (2.82 g, 28.8 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (1.01 g, 1.44 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain compound 43-2. 1H NMR (400 MHz, CDCl3) δ 7.59 (d, J=8.4 Hz, 1H), 7.51-7.47 (m, 1H), 7.13 (d, J=1.0 Hz, 1H), 3.74-3.69 (m, 3H), 2.58 (d, J=1.2 Hz, 3H), 1.38 (s, 12H).
Compound 43-2 (3.5 g, 11.5 mmol) was dissolved in dichloromethane (20 mL), and boron tribromide (2.22 mL, 23 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (30 mL) and extracted with dichloromethane (30 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. To the crude product was added dichloromethane (10 mL), and a solid was precipitated, and the mixture was filtered to obtain compound 43-3. 1H NMR (400 MHz, DMSO-d6) δ 7.64-7.50 (m, 2H), 7.21 (s, 1H), 2.58 (d, J=1.2 Hz, 3H).
Compound 43-3 (200 mg, 961 μmol) was dissolved in dioxane (10 mL) and water (2 mL), and intermediate 38-1 (231 mg, 961 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (140 mg, 192 μmol), and potassium carbonate (132 mg, 961 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the crude product was separated by preparative high performance liquid chromatography (chromatographic column: Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 20% to 50%, 6 min) to obtain the hydrochloride of compound 43. 1H NMR (400 MHz, CD3OD) δ 7.78-7.48 (m, 2H), 7.36 (s, 1H), 7.22 (d, J=8.0 Hz, 1H), 4.49-4.28 (m, 1H), 3.95-3.79 (m, 1H), 3.57 (d, J=11.3 Hz, 1H), 3.33 (s, 2H), 3.20-3.01 (m, 1H), 3.00-2.88 (m, 3H), 2.64 (s, 3H), 2.42-2.33 (m, 3H), 2.27 (d, J=11.8 Hz, 1H), 2.19-1.95 (m, 1H), 1.80-1.61 (m, 1H). MS-ESI calculated for [M+H]+ 369, found 369.
Synthetic Route:
Compound 20-4 (6.00 g, 24.7 mmol) was dissolved in tetrahydrofuran (80 mL), and a mixed solution of lithium diisopropylamide 2M tetrahydrofuran in n-heptane (18.5 mL) was added thereto at 0° C., and the reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with N-fluorobenzenesulfonimide (23.4 g, 74.0 mmol), stirred at 25° C. for 4 hours. The reaction mixture was added with water (40 mL) and extracted with ethyl acetate (40 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain a mixture of intermediates 44a-1 and 44b-1.
The mixture of 44a-1 (2.90 g, 7.11 mmol, purity: 64%) and 44b-1 (2.90 g, 3.32 mmol, purity: 32%) were dissolved in dioxane (30 mL), and bis(pinacolato)diboron (2.71 g, 10.7 mmol), potassium acetate (1.40 g, 14.2 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (499 mg, 711 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 10/1, V/V) to obtain a mixture of 44a-2 and 44b-2.
The mixture of 44a-2 and 44b-2 (500 mg, 1.62 mmol) was dissolved in dichloromethane (10 mL), and boron tribromide (610 mg, 2.43 mmol) was added thereto at 0° C. The reaction mixture was stirred at 0° C. for 0.5 hours. The reaction mixture was added with water (10 mL) and extracted with dichloromethane (20 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. To the crude product was added dichloromethane (6 mL), and a solid was precipitated, and the mixture was filtered to obtain a mixture of 44a-3 and 44b-3.
Intermediate 2-3 (80.0 mg, 332 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL), and the mixture of 44a-3 and 44b-3 (77.5 mg, 366 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (24.3 mg, 33.2 μmol), and potassium carbonate (115 mg, 831 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude products of compounds 44a and 44b. The crude products were separated by preparative high performance liquid chromatography (chromatographic column: Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 12% to 30%, 6 min) to obtain compounds 44a and 44b.
Compound 44a: 1H NMR (400 MHz, CD3OD) δ 7.69-7.57 (m, 1H), 7.52 (d, J=7.6 Hz, 1H), 7.30 (d, J=7.6 Hz, 1H), 7.16-7.15 (m, 1H), 4.38-4.34 (m, 1H), 3.86-3.80 (m, 1H), 3.56-3.53 (m 1H), 3.16-3.02 (m, 1H), 2.95-2.89 (m, 3H), 2.35-2.33 (m, 3H), 2.27-2.24 (m, 1H), 2.15-2.11 (m, 1H), 2.08-1.95 (m, 2H), 1.74-1.69 (m, 1H). MS-ESI calculated for [M+H]+ 373, found 373.
Compound 44b: 1H NMR (400 MHz, CD3OD) δ 7.69-7.58 (m, 1H), 7.54 (d, J=7.2 Hz, 1H), 7.35 (d, J=7.2 Hz, 1H), 4.39-4.34 (m, 1H), 3.86-3.80 (m, 1H), 3.57-3.54 (m, 1H), 3.16-3.02 (m, 1H), 2.95-2.90 (m, 3H), 2.34-2.33 (m, 3H), 2.28-2.25 (m, 1H), 2.16-2.12 (m, 1H), 2.06-1.95 (m, 2H), 1.75-1.66 (m, 1H). MS-ESI calculated for [M+H]+ 391, found 391.
Synthetic Route:
Compound 45-1 (4.6 g, 32.3 mmol) and triphenylphosphine (9.33 g, 35.6 mmol) were dissolved in dichloromethane (150 mL), cooled to 0° C., and carbon tetrabromide (11.8 g, 35.6 mmol) was added thereto. The reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the residue was slurried with petroleum ether (200 mL) at 25° C. for 1 hour, filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 1/0, V/V) to obtain compound 45-2. 1H NMR (400 MHz, CDCl3) δ 7.17 (d, J=5.2 Hz, 1H), 6.97-6.95 (m, 1H), 6.87-6.85 (m, 1H), 3.48-3.45 (m, 2H), 3.06-3.03 (m, 2H), 2.27-2.20 (m, 2H).
Compound 45-2 (3 g, 14.6 mmol) was dissolved in dimethyl sulfoxide (30 mL), and sodium cyanide (1.22 g, 24.9 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 3 hours under nitrogen atmosphere. The reaction mixture was poured into water (50 mL) and extracted with ethyl acetate (30 mL×2). The combined organic phases were sequentially washed with water (50 mL×3) and saturated brine (50 mL×1), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain compound 45-3. 1H NMR (400 MHz, CDCl3) δ −7.18 (dd, J=5.2, 0.8 Hz, 1H), 6.96-6.94 (m, 1H), 6.86-6.85 (m, 1H), 3.04-3.00 (m, 2H), 2.40-2.37 (m, 2H), 2.08-2.00 (m, 2H).
Compound 45-3 (1.64 g, 10.8 mmol) and potassium hydroxide (3.53 g, 62.9 mmol) were dissolved in ethanol (15 mL) and water (15 mL), and the reaction mixture was stirred at 100° C. for 24 hours. The reaction mixture was concentrated under reduced pressure to remove ethanol, and the pH of the residue was adjusted to 4 with hydrochloric acid aqueous solution (6.00 mol/L) at 0° C., and then the mixture was extracted with ethyl acetate (30 mL×2). The combined organic phases were washed with saturated brine (50 mL xl), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain compound 45-4. 1H NMR (400 MHz, CDCl3) δ 7.15-7.13 (m, 1H), 6.94-6.92 (m, 1H), 6.82-6.81 (m, 1H), 2.94-2.90 (m, 2H), 2.45-2.41 (m, 2H), 2.07-2.00 (m, 2H).
Compound 45-4 (2 g, 11.8 mmol) was dissolved in acetic anhydride (2 mL) and phosphoric acid (0.04 mL), and the reaction mixture was stirred at 120° C. for 2.5 hours. The reaction mixture was cooled to 0° C., quenched with water (20 mL), extracted with dichloromethane (30 mL×2), and the combined organic phases were sequentially washed with sodium hydroxide aqueous solution (1N, 50 mL×1) and saturated brine (50 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 5/1, V/V) to obtain compound 45-5. 1H NMR (400 MHz, CDCl3) δ 7.39 (d, J=5.2 Hz, 1H), 7.06 (d, J=5.2 Hz, 1H), 3.06-3.03 (m, 2H), 2.58-2.55 (m, 2H), 2.25-2.19 (m, 2H).
To ethyl acetate (30 mL) was added copper bromide (9.10 g, 40.7 mmol), and the suspension was stirred at 80° C. for 10 minutes. Compound 45-5 (1.55 g, 10.2 mmol) was dissolved in chloroform (30 mL), then the mixture was added into the above suspension, and the reaction mixture was stirred and reacted at 80° C. for 24 hours. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with ethyl acetate (100 mL) and then filtered. The filtrate was washed with saturated sodium bicarbonate aqueous solution (100 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain compound 45-6. 1H NMR (400 MHz, CDCl3) δ 7.41 (d, J=5.2 Hz, 1H), 7.10 (d, J=5.2 Hz, 1H), 3.09 (s, 4H). MS-ESI calculated for [M+H]+ 311, found 311.
Compound 45-6 (2.63 g, 8.48 mmol) and lithium carbonate (3.76 g, 50.9 mmol) were dissolved in N,N-dimethylformamide (30.0 mL), and the reaction mixture was stirred at 100° C. for 6 hours. The reaction mixture was filtered, and the pH of the filtrate was adjusted to 1 with hydrochloric acid aqueous solution (1.00 mol/L), and the mixture was extracted with ethyl acetate (100 mL×2). The combined organic phases were sequentially washed with water (100 mL×3) and saturated brine (100 mL×1), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain compound 45-7. 1H NMR (400 MHz, CDCl3) δ 7.51 (d, J=5.2 Hz, 1H), 7.40-7.38 (m, 2H), 7.35-7.33 (m, 1H), 5.90 (s, 1H). MS-ESI calculated for [M+H]+ 230, found 230.
Compound 45-7 (1.91 g, 8.34 mmol) was dissolved in acetone (20 mL), and the reaction mixture was added with potassium carbonate (2.30 g, 16.7 mmol) and methyl iodide (2.37 g, 16.7 mmol), stirred at 40° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 5/1, V/V) to obtain compound 45-8. 1H NMR (400 MHz, CDCl3) δ 7.44-7.39 (m, 2H), 7.37-7.35 (m, 2H), 3.93 (s, 3H).
Compound 45-8 (1.64 g, 6.75 mmol), bis(pinacolato)diboron (2.23 g, 8.77 mmol), potassium acetate (1.32 g, 13.5 mmol), and bis(triphenylphosphine)palladium(II) chloride (473 mg, 675 μmol) were dissolved in 1,4-dioxane (40.0 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 10/1, V/V) to obtain compound 45-9. 1H NMR (400 MHz, CDCl3) δ 7.69-7.67 (m, 1H), 7.63-7.61 (m, 1H), 7.50 (d, J=5.6 Hz, 1H), 7.36 (d, J=5.6 Hz, 1H), 4.01 (s, 3H), 1.40 (s, 12H). MS-ESI calculated for [M+H]+ 291, found 291.
Compound 2-3 (100 mg, 0.415 mmol), compound 45-9 (180 mg, 0.620 mmol), potassium carbonate (172 mg, 1.25 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (33.9 mg, 41.5 μmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (dichloromethane/methanol/triethylamine, 5/1/0.2, V/V) to obtain compound 45-10. MS-ESI calculated for [M+H]+ 369, found 369.
Compound 45-10 (120 mg, 317 μmol) was dissolved in anhydrous dichloromethane (5.0 mL), and boron tribromide (91.6 μL, 950 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 1 hour. The reaction mixture was quenched with methanol (3.00 mL) at 0° C., and then concentrated under reduced pressure. The residue was purified by preparative high performance liquid chromatography (Phenomenex Synergi C18 150×25 mm×10 μm; mobile phase A: 0.225% formic acid aqueous solution; mobile phase B: acetonitrile; B %: 0% to 26%, 10 min) to obtain the formate of compound 45. 1H NMR (400 MHz, CD3OD) δ 8.45 (s, 1H), 7.64-7.62 (m, 1H), 7.56-7.54 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.90 (d, J=0.8 Hz, 1H), 4.45-4.39 (m, 1H), 3.77-3.71 (m, 1H), 3.24-3.22 (m, 1H), 3.02-2.98 (m, 1H), 2.80 (s, 3H), 2.21 (d, J=0.4 Hz, 3H), 2.17-2.08 (m, 2H), 1.97-1.89 (m, 1H), 1.71-1.63 (m, 1H). MS-ESI calculated for [M+H]+ 355, found 355.
Synthetic Route:
Compound 31-1 (140 mg, 0.315 mmol), compound 20-5 (183 mg, 0.629 mmol), potassium carbonate (130 mg, 0.944 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (25.7 mg, 31.5 μmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (dichloromethane/methanol, 10/1, V/V) to obtain compound 46-1. MS-ESI calculated for [M+H]+ 439, found 439.
Compound 46-1 (110 mg, 243 μmol) was dissolved in anhydrous dichloromethane (6.00 mL), and boron tribromide (70.1 μL, 728 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 1 hour. The reaction mixture was quenched with methanol (3.00 mL) at 0° C., and then concentrated under reduced pressure. The residue was purified by preparative high performance liquid chromatography (Phenomenex Synergi C18 150×25 mm×10 μm; mobile phase A: 0.225% formic acid aqueous solution; mobile phase B: acetonitrile; B %: 0% to 30%, 10 min) to obtain the formate of compound 46. 1H NMR (400 MHz, CD3OD) δ 8.48 (s, 1H), 7.63-7.62 (m, 1H), 7.55-7.53 (m, 2H), 7.24 (d, J=8.0 Hz, 1H), 6.88 (d, J=0.8 Hz, 1H), 4.39-4.32 (m, 1H), 4.08-4.04 (m, 2H), 3.78-3.76 (m, 1H), 3.47-3.40 (m, 2H), 3.30-3.26 (m, 1H), 2.99-2.93 (m, 1H), 2.83 (s, 1H), 2.22 (s, 3H), 2.19-2.00 (m, 4H), 1.97-1.80 (m, 2H), 1.79-1.65 (m, 3H). MS-ESI calculated for [M+H]+ 425, found 425.
Synthetic Route:
The hydrochloride of compound 38-1 (200 mg, 760 μmol), compound 47-1 (233 mg, 1.52 mmol), and potassium carbonate (315 mg, 2.28 mmol) were dissolved in N,N-dimethylformamide (5 mL), reacted at 60° C. for 12 hours, and the reaction mixture was filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane/methanol, 10/1, V/V) to obtain compound 47-2. MS-ESI for compound 47-2, calculated for [M+H]+ 299, found 299.
Compound 47-2 (600 mg, 2.01 mmol), compound 20-5 (1.17 g, 4.02 mmol), and potassium carbonate (833 mg, 6.02 mmol) were dissolved in dioxane (10 mL) and water (1 mL), and the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (147 mg, 201 μmol) under nitrogen atmosphere, and the reaction was stirred at 100° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (dichloromethane/methanol, 10/1, V/V) to obtain compound 47-3. MS-ESI for compound 47-3, calculated for [M+H]+ 427, found 427.
Compound 47-3 (662 mg, 1.55 mmol) was dissolved in dichloromethane (15 mL), and boron tribromide (1.17 g, 4.66 mmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 1 hour, quenched with methanol (10 mL) at 0° C., and then concentrated under reduced pressure. The residue was purified by preparative high performance liquid chromatography (C18 column 75×30 mm×3 μm; mobile phase A: 0.225% formic acid aqueous solution; mobile phase B: acetonitrile; B %: 0% to 30%, 7 min) to obtain the formate of compound 47. Formate of compound 47 1H NMR (400 MHz, CD3OD) δ 8.403 (s, 1H), 7.62 (d, J=5.6 Hz, 1H), 7.54-7.52 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.89 (s, 1H), 4.45-4.38 (m, 1H), 3.79-3.76 (m, 1H), 3.43-3.40 (m, 1H), 3.34-3.33 (m, 3H), 3.04-3.03 (m, 1H), 2.92-2.87 (m, 1H), 2.22 (s, 3H), 2.15-2.10 (m, 1H), 2.04-2.00 (m, 1H), 1.71-1.61 (m, 1H), 1.33 (d, J=4.4 Hz, 6H). MS-ESI for the formate of compound 47, calculated for [M+H]+ 413, found 413.
Synthetic Route:
The hydrochloride of compound 38-1 (300 mg, 1.14 mmol) was dissolved in toluene (4 mL), and trifluoroethyl trifluoromethanesulfonate (529 mg, 2.28 mmol) and triethylamine (346 mg, 3.42 mmol) were added thereto. The reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was added with water (10 mL) and extracted with ethyl acetate (30 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 48-1. MS-ESI calculated for [M+H]+ 309, found 309.
Compound 48-1 (100 mg, 324 μmol) was dissolved in dioxane (6 mL) and water (1.2 mL). Intermediate 26-1 (75.4 mg, 389 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (23.7 mg, 32.4 μmol), and potassium carbonate (112 mg, 810 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 48. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 52% to 82%, 8 min) to obtain compound 48. 1H NMR (400 MHz, CD3OD) δ 7.58 (d, J=5.6 Hz, 1H), 7.48 (d, J=5.6 Hz, 2H), 7.25 (d, J=8.0 Hz, 1H), 6.83 (s, 1H), 4.14-4.10 (m, 1H), 3.18-3.09 (m, 3H), 2.84-2.82 (m, 1H), 2.56 (t, J=9.2 Hz, 1H), 2.45 (t, J=9.2 Hz, 1H), 2.20 (s, 3H), 1.96-1.93 (m, 1H), 1.82-1.79 (m, 1H), 1.72-1.64 (m, 1H), 1.50-1.42 (m, 1H). MS-ESI calculated for [M+H]+ 423, found 423.
Synthetic Route:
The hydrochloride of compound 38-1 (200 mg, 760 μmol) was dissolved in tetrahydrofuran (5 mL), and 3-methoxycyclobutan-1-one (152 mg, 1.52 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (322 mg, 1.52 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×3). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 49-1. MS-ESI calculated for [M+H]+ 311, found 311.
Compound 49-1 (140 mg, 450 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate 26-1 (105 mg, 541 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (33.0 mg, 45.0 μmol), and potassium carbonate (156 mg, 1.13 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 49. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 40% to 70%, 8 min) to obtain compound 49. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.6 Hz, 1H), 7.49-7.47 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.81 (s, 1H), 4.14-4.09 (m, 1H), 3.69-3.62 (m, 1H), 3.24-3.23 (m, 3H), 3.05-2.95 (m, 1H), 2.66-2.64 (m, 1H), 2.51-2.36 (m, 3H), 2.20 (s, 3H), 2.11-1.94 (m, 3H), 1.83-1.64 (m, 4H), 1.44-1.42 (m, 1H). MS-ESI calculated for [M+H]+ 425, found 425.
Synthetic Route:
The hydrochloride of compound 38-1 (600 mg, 2.28 mmol) and compound 50-1 (2.01 g, 11.4 mmol) were dissolved in tetrahydrofuran (3 mL) and methanol (6 mL). The reaction mixture was stirred at 70° C. for 12 hours, and cooled to 25° C., and sodium triacetoxyborohydride (2.42 g, 11.4 mmol) was added thereto. The reaction mixture was stirred at 70° C. for 24 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 50-2. MS-ESI calculated for [M+H]+ 387, found 387.
Compound 50-2 (170 mg, 0.439 mmol), compound 20-5 (661 mg, 2.24 mmol), potassium carbonate (182 mg, 1.32 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (32.2 mg, 43.9 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred at 110° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was separated by silica gel column chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 50-3. MS-ESI calculated for [M+H]+ 515, found 515.
Compound 50-3 (83 mg, 143 μmol) was dissolved in anhydrous dichloromethane (5.00 mL), and boron tribromide (41.3 μL, 429 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 12 hours. The reaction mixture was quenched with methanol (3.00 mL) at 0° C. and then concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (Waters Xbridge 150×25 mm×5 μm; mobile phase A: 10 mmol/L ammonium bicarbonate aqueous solution; mobile phase B: acetonitrile; B %: 37% to 57%, 8 min) to obtain compound 50. 1H NMR (400 MHz, CD3OD) δ 7.62-7.60 (m, 1H), 7.53-7.51 (m, 2H), 7.25 (d, J=8.4 Hz, 1H), 6.85 (s, 1H), 4.60 (s, 1H), 4.27-4.21 (m, 1H), 4.04-3.97 (m, 1H), 3.02-2.97 (m, 1H), 2.81-2.69 (m, 1H), 2.63-2.60 (m, 2H), 2.52-2.33 (m, 2H), 2.22 (s, 3H), 2.12-2.09 (m, 1H), 1.99-1.89 (m, 3H), 1.85-1.75 (m, 1H), 1.61-1.53 (m, 1H). MS-ESI calculated for [M+H]+ 411, found 411.
Synthetic Route:
The hydrochloride of compound 38-1 (200 mg, 760 μmol) was dissolved in ethyl acetate (5 mL), and 3-dimethylaminopropionic acid hydrochloride (233 mg, 1.52 mmol), triethylamine (385 mg, 3.80 mmol), and propylphosphonic anhydride (1.21 g, 1.90 mmol, 50% ethyl acetate solution) were added thereto. The reaction mixture was stirred at 25° C. for 12 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was extracted with ethyl acetate (10 mL×5). The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 51-1. MS-ESI calculated for [M+H]+ 326, found 326.
Compound 51-1 (100 mg, 307 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate 26-1 (71.5 mg, 368 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (22.5 mg, 30.7 μmol), and potassium carbonate (106 mg, 767 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 51. The crude product was separated by high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 29% to 59%, 8 min) to obtain compound 51. 1H NMR (400 MHz, CD3OD) δ 7.60-7.58 (m, 1H), 7.46-7.43 (m, 2H), 7.24-7.21 (m, 1H), 6.86-6.84 (m, 1H), 4.17-3.90 (m, 2H), 3.72-3.69 (m, 1H), 3.58-3.37 (m, 2H), 2.67-2.46 (m, 4H), 2.30 (s, 2H), 2.21 (s, 3H), 2.20 (s, 4H), 2.15-2.08 (m, 1H), 1.94-1.75 (m, 2H), 1.69-1.60 (m, 1H). MS-ESI calculated for [M+H]+ 440, found 440.
Synthetic Route:
The hydrochloride of compound 38-1 (200 mg, 760 μmol) was dissolved in tetrahydrofuran (5 mL), and N,N-dimethylacrylamide (151 mg, 1.52 mmol), p-toluenesulfonic acid monohydrate (145 mg, 760 μmol), and triethylamine (76.9 mg, 760 mol) were added thereto. The reaction mixture was stirred at 70° C. for 12 hours. The reaction mixture was added with water (10 mL) and extracted with ethyl acetate (30 mL×3), and the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 52-1. MS-ESI calculated for [M+H]+ 326, found 326.
Compound 52-1 (100 mg, 307 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL), and intermediate 26-1 (71.5 mg, 368 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (22.5 mg, 30.7 μmol), and potassium carbonate (106 mg, 767 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 52. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 80×40 mm×3 μm; mobile phase: 0.05% ammonia solution-acetonitrile; gradient: acetonitrile: 29% to 59%, 8 min) to obtain compound 52. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=6.0 Hz, 1H), 7.48-7.46 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.82 (s, 1H), 4.15-4.10 (m, 1H), 3.09 (s, 4H), 2.93 (s, 3H), 2.74-2.70 (m, 3H), 2.64-2.60 (m, 2H), 2.30-2.27 (m, 1H), 2.21 (s, 3H), 2.16-2.13 (m, 1H), 2.03-1.97 (m, 1H), 1.85-1.81 (m, 1H), 1.74-1.65 (m, 1H), 1.47-1.43 (m, 1H). MS-ESI calculated for [M+H]+ 440, found 440.
Synthetic Route:
Compound 12-2 (200 mg, 612 μmol), compound 20-5 (887.90 mg, 3.06 mmol), and potassium carbonate (253.73 mg, 1.84 mmol) were dissolved in dioxane (5 mL) and water (0.5 mL), and the reaction mixture was added with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (44.8 mg, 61.2 μmol) under nitrogen atmosphere, and the reaction was stirred at 110° C. for 12 hours. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 50/1 to 1/1, V/V) to obtain compound 53-1. MS-ESI calculated for [M+H]+ 455, found 455.
Compound 53-1 (178 mg, 392 μmol) was dissolved in hydrogen chloride/ethyl acetate (4 mol/L, 5 mL), and stirred and reacted at 25° C. for 1 hour. The reaction mixture was concentrated under reduced pressure to obtain the hydrochloride of compound 53-2. MS-ESI calculated for [M+H]+ 355, found 355.
The hydrochloride of compound 53-2 (181 mg, 511 mmol) was dissolved in dichloromethane (5 mL), and boron tribromide (383 mg, 1.53 mmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 1 hour, quenched with ammonia water (3 mL) at 0° C., and then concentrated under reduced pressure to obtain compound 53-3. MS-ESI calculated for [M+H]+ 341, found 341.
Compound 53-3 (85 mg, 250 μmol), compound bromoacetonitrile (30.0 mg, 250 μmol), and potassium carbonate (104 mg, 749 μmol) were dissolved in N,N-dimethylformamide (5 mL), and the mixture was stirred and reacted at 0° C. for 2 hours. The reaction mixture was filtered and purified by preparative high performance liquid chromatography (C18 column 150×25 mm×5 μm; mobile phase: 10 mmol/L ammonium bicarbonate aqueous solution-acetonitrile; gradient: acetonitrile: 34% to 64%, 8 min) to obtain compound 53. 1H NMR (400 MHz, DMSO-d6) δ 7.66 (d, J=3.2 Hz, 2H), 7.52 (d, J=8.0 Hz, 1H), 7.24 (d, J=8.0 Hz, 1H), 6.73 (d, J=8.0 Hz, 2H), 4.11 (s, 1H), 3.78 (s, 2H), 3.01 (d, J=8.0 Hz, 1H), 2.69-2.66 (m, 1H), 2.67-2.22 (m, 1H), 2.11-2.08 (m, 3H), 1.92-1.89 (m, 1H), 1.80-1.77 (m, 1H), 1.60-1.58 (m, 1H), 1.33-1.31 (m, 1H). MS-ESI calculated for [M+H]+ 380, found 380.
Synthetic Route:
Compound 54-1 (480 mg, 3.37 mmol) was dissolved in 1,4-dioxane (2 mL), and then compound 2-2 (500 mg, 3.07 mmol), palladium acetate (68.9 mg, 307 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (355 mg, 613 μmol), and cesium carbonate (2.50 g, 7.67 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 54-2. MS-ESI calculated for [M+H]+ 269, found 269.
Compound 54-2 (200 mg, 744 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (144 mg, 744 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (54.5 mg, 74.4 μmol), and potassium carbonate (257 mg, 1.86 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 54. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 30%, 10 min) to obtain the hydrochloride of compound 54. 1H NMR (400 MHz, CD3OD) δ 7.71-7.66 (m, 3H), 7.61 (s, 1H), 7.32 (d, J=8.0 Hz, 1H), 4.33 (td, J=12.0, 3.6 Hz, 1H), 3.45 (td, J=12.0, 3.6 Hz, 1H), 2.97 (s, 3H), 2.86 (s, 3H), 2.37 (s, 3H), 2.25-2.22 (m, 2H), 2.04-1.99 (m, 1H), 1.87-1.86 (m, 1H), 1.70-1.54 (m, 2H), 1.51-1.43 (m, 2H). MS-ESI calculated for [M+H]+ 383, found 383.
Synthetic Route:
Compound 55-1 (324 mg, 3.68 mmol) was dissolved in 1,4-dioxane (10 mL), and compound 2-2 (500 mg, 3.07 mmol), palladium acetate (68.9 mg, 307 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (355 mg, 613 μmol), and cesium carbonate (2.50 g, 7.67 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 55-2. MS-ESI calculated for [M+H]+ 215, found 215.
Compound 55-2 (150 mg, 699 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (149 mg, 769 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (51.1 mg, 69.9 μmol), and potassium carbonate (241 mg, 1.75 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 55. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 55. 1H NMR (400 MHz, CD3OD) δ 7.71-7.70 (m, 1H), 7.68-7.63 (m, 3H), 7.32 (d, J=8.4 Hz, 1H), 3.92 (t, J=5.4 Hz, 2H), 3.52 (t, J=5.4 Hz, 2H), 3.01 (s, 6H), 2.36 (s, 3H). MS-ESI calculated for [M+H]+ 329, found 329.
Synthetic Route:
Compound 56-1 (273 mg, 3.07 mmol) was dissolved in 1,4-dioxane (5 mL), and compound 2-2 (500 mg, 3.07 mmol), palladium acetate (68.9 mg, 307 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (355 mg, 613 μmol), and cesium carbonate (2.50 g, 7.67 mmol) were added thereto. The system was replaced with nitrogen three times, and stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 56-2. MS-ESI calculated for [M+H]+ 216, found 216.
Compound 56-2 (120 mg, 556 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (118 mg, 612 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (40.7 mg, 55.6 μmol), and potassium carbonate (192 mg, 1.39 mmol) were added thereto. The system was replaced with nitrogen three times, and stirred at 100° C. for 2 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 56. The crude product was separated by high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 56. 1H NMR (400 MHz, CD3OD) δ 7.65-7.64 (m, 1H), 7.60-7.53 (m, 3H), 7.22 (d, J=8.4 Hz, 1H), 3.48 (s, 2H), 2.30 (s, 3H), 1.34 (s, 6H). MS-ESI calculated for [M+H]+ 330, found 330.
Synthetic Route:
Compound 57-1 (253 mg, 3.37 mmol) was dissolved in 1,4-dioxane (2 mL), and compound 2-2 (500 mg, 3.07 mmol), palladium acetate (68.9 mg, 307 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (355 mg, 613 μmol), and cesium carbonate (2.50 g, 7.67 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 57-2. MS-ESI calculated for [M+H]+ 202, found 202.
Compound 57-2 (150 mg, 744 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (144 mg, 744 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (54.4 mg, 74.4 μmol), and potassium carbonate (257 mg, 1.86 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 57. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 57. 1H NMR (400 MHz, CD3OD) δ 7.64 (d, J=5.6 Hz, 1H), 7.60-7.57 (m, 2H), 7.49 (s, 1H), 7.22 (d, J=8.4 Hz, 1H), 4.12-4.04 (m, 1H), 3.54-3.50 (m, 1H), 3.42-3.37 (m, 1H), 2.30 (s, 3H), 1.29 (d, J=6.4 Hz, 3H). MS-ESI calculated for [M+H]+ 316, found 316.
Synthetic Route:
Compound 55-2 (250 mg, 780 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 43-3 (162 mg, 780 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (57.1 mg, 78.0 μmol), and potassium carbonate (270 mg, 1.95 mmol) were added thereto. The system was replaced with nitrogen three times, and stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by thin-layer chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 58. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 7% to 37%, 10 min) to obtain the hydrochloride of compound 58. 1H NMR (400 MHz, CD3OD) δ 7.62 (s, 1H), 7.52 (d, J=8.4 Hz, 1H), 7.34 (s, 1H), 7.21 (d, J=8.4 Hz, 1H), 3.91 (t, J=6.0 Hz, 2H), 3.51 (t, J=6.0 Hz, 2H), 3.01 (s, 6H), 2.62 (s, 3H), 2.35 (s, 3H). MS-ESI calculated for [M+H]+ 343, found 343.
Synthetic Route:
Compound 2-2 (1.2 g, 7.36 mmol), compound 59-1 (889 mg, 8.62 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (852 mg, 1.47 mmol), cesium carbonate (4.80 g, 14.7 mmol), and tris(dibenzylideneacetone)dipalladium (674 mg, 0.736 mmol) were dissolved in 1,4-dioxane (30 mL), and the reaction mixture was stirred at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was first purified by silica gel column chromatography (petroleum ether/ethyl acetate, 100/1 to 1/5, V/V), and then purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 59-2. 1H NMR (400 MHz, CDCl3) δ 6.62 (s, 1H), 4.96 (d, J=3.2 Hz, 1H), 4.42-4.40 (m, 1H), 4.26-4.24 (m, 1H), 4.22-4.17 (m, 2H), 4.08-4.04 (m, 1H), 3.74-3.68 (m, 2H), 2.24 (s, 3H). MS-ESI calculated for [M+H]+ 230, found 230.
Compound 59-2 (100 mg, 0.435 mmol), compound 26-1 (170 mg, 0.876 mmol), potassium carbonate (181 mg, 1.31 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (35.6 mg, 43.5 μmol) were dissolved in 1,4-dioxane (5 mL) and water (0.5 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 13% to 33%, 6 min) to obtain the hydrochloride of compound 59. 1H NMR (400 MHz, CD3OD) δ 7.70-7.68 (m, 1H), 7.66-7.64 (m, 2H), 7.52 (s, 1H), 7.30-7.28 (m, 1H), 4.41 (s, 1H), 4.28 (s, 1H), 4.24-4.21 (m, 1H), 4.14-4.10 (m, 1H), 3.89 (d, J=8.4 Hz, 1H), 3.78 (d, J=9.6 Hz, 1H), 2.35 (s, 3H). MS-ESI calculated for [M+H]+ 344, found 344.
Synthetic Route:
Compound 2-2 (500 mg, 3.07 mmol) and compound 60-1 (500 mg, 3.30 mmol) were dissolved in N-methylpyrrolidone (10 mL), and N,N-diisopropylethylamine (1.60 mL, 9.20 mmol) was added thereto. The reaction mixture was heated to 220° C. under microwave irradiation and reacted for 6 hours. The reaction mixture was diluted with ethyl acetate (100 mL), sequentially washed with water (80 mL×3) and saturated brine (80 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 60-2. 1H NMR (400 MHz, CDCl3) δ 6.62 (s, 1H), 4.95 (d, J=7.2 Hz, 1H), 3.65-3.56 (m, 1H), 3.48-3.42 (m, 1H), 2.28 (s, 3H), 2.14-2.05 (m, 2H), 1.81-1.71 (m, 2H), 1.43-1.24 (m, 4H). MS-ESI calculated for [M+H]+ 242, found 242.
Compound 60-2 (100 mg, 0.414 mmol), compound 26-1 (161 mg, 0.830 mmol), potassium carbonate (172 mg, 1.24 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (33.8 mg, 41.4 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred and reacted at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 20% to 40%, 6 min) to obtain the hydrochloride of compound 60. 1H NMR (400 MHz, CD3OD) δ 7.66-7.64 (m, 1H), 7.61-7.58 (m, 2H), 7.41 (s, 1H), 7.24-7.22 (m, 1H), 3.69-3.65 (m, 1H), 3.57-3.51 (m, 1H), 2.31 (s, 3H), 2.12-2.09 (m, 2H), 1.84-1.82 (m, 2H), 1.51-1.38 (m, 4H). MS-ESI calculated for [M+H]+ 356, found 356.
Synthetic Route:
Compound 56-2 (100 mg, 464 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 43-3 (106 mg, 510 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (33.9 mg, 46.4 μmol), and potassium carbonate (160 mg, 1.16 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 61. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 7% to 37%, 10 min) to obtain the hydrochloride of compound 61. 1H NMR (400 MHz, CD3OD) δ 7.50 (s, 1H), 7.44 (d, J=8.0 Hz, 1H), 7.28 (s, 1H), 7.12 (d, J=8.0 Hz, 1H), 3.46 (s, 2H), 2.60 (s, 3H), 2.30 (s, 3H), 1.33 (s, 6H). MS-ESI calculated for [M+H]+ 344, found 344.
Synthetic Route:
Compound 54-2 (300 mg, 692 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 43-3 (432 mg, 2.08 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (50.6 mg, 69.2 μmol), and potassium carbonate (239 mg, 1.73 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 62. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 62. 1H NMR (400 MHz, CD3OD) δ 7.60 (s, 1H), 7.53 (d, J=8.4 Hz, 1H), 7.34 (s, 1H), 7.22 (d, J=8.4 Hz, 1H), 4.33 (dt, J=4.0, 10.8 Hz, 1H), 3.45 (dt, J=4.0, 10.8 Hz, 1H), 2.91 (s, 6H), 2.62 (s, 3H), 2.36 (s, 3H), 2.23 (s, 2H), 2.04-1.99 (m, 1H), 1.87-1.86 (m, 1H), 1.70-1.57 (m, 2H), 1.53-1.46 (m, 2H). MS-ESI calculated for [M+H]+ 397, found 397.
Synthetic Route:
Compound 57-2 (150 mg, 744 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 43-3 (310 mg, 1.49 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (54.4 mg, 74.4 μmol), and potassium carbonate (257 mg, 1.86 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 63. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 63. 1H NMR (400 MHz, CD3OD) δ 7.46-7.44 (m, 2H), 7.28 (s, 1H), 7.12 (d, J=8.4 Hz, 1H), 4.09-4.05 (m, 1H), 3.53-3.49 (m, 1H), 3.41-3.36 (m, 1H), 2.61 (s, 3H), 2.30 (s, 3H), 1.28 (d, J=6.4 Hz, 3H). MS-ESI calculated for [M+H]+ 330, found 330.
Synthetic Route:
Compound 2-2 (470 mg, 2.88 mmol) and compound 64-1 (470 mg, 3.10 mmol) were dissolved in N-methylpyrrolidone (10 mL), and N,N-diisopropylethylamine (1.51 mL, 8.65 mmol) was added thereto. The reaction mixture was heated to 220° C. under microwave irradiation and reacted for 3 hours. The reaction mixture was diluted with ethyl acetate (100 mL), sequentially washed with water (80 mL×3) and saturated brine (80 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 64-2. 1H NMR (400 MHz, CDCl3) δ 6.63 (s, 1H), 5.11 (d, J=7.2 Hz, 1H), 3.64-3.58 (m, 1H), 3.49-3.43 (m, 1H), 2.28 (s, 3H), 2.12-2.09 (m, 2H), 1.79-1.73 (m, 2H), 1.47-1.23 (m, 4H). MS-ESI calculated for [M+H]+ 242, found 242.
Compound 64-2 (90 mg, 0.372 mmol), compound 26-1 (145 mg, 0.748 mmol), potassium carbonate (154 mg, 1.12 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (30.4 mg, 37.2 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 19% to 39%, 6 min) to obtain the hydrochloride of compound 64. 1H NMR (400 MHz, CD3OD) δ 7.66-7.64 (m, 1H), 7.62-7.58 (m, 2H), 7.39-7.37 (m, 1H), 7.24-7.22 (m, 1H), 3.70-3.67 (m, 1H), 3.57-3.51 (m, 1H), 2.31 (s, 3H), 2.12-2.09 (m, 2H), 1.85-1.83 (m, 2H), 1.53-1.31 (m, 4H). MS-ESI calculated for [M+H]+ 356, found 356.
Synthetic Route:
Compound 65-1 (318 mg, 3.37 mmol) was dissolved in 1,4-dioxane (20 mL), and then compound 2-2 (500 mg, 3.07 mmol), tris(dibenzylideneacetone)dipalladium (281 mg, 307 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (355 mg, 613 μmol), and cesium carbonate (2.50 g, 7.67 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 65-2. MS-ESI calculated for [M+H]+ 221, found 221.
Compound 65-2 (150 mg, 680 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (145 mg, 748 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (50.0 mg, 68.0 μmol), and potassium carbonate (235 mg, 1.70 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 65. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 10% to 30%, 10 min) to obtain the hydrochloride of compound 65. 1H NMR (400 MHz, CD3OD) δ 9.49 (s, 1H), 8.80 (d, J=8.4 Hz, 1H), 8.61 (d, J=5.4 Hz, 1H), 8.13 (dd, J=5.4, 8.4 Hz, 1H), 8.02 (s, 1H), 7.74-7.69 (m, 3H), 7.40 (d, J=8.4 Hz, 1H), 2.51 (s, 3H). MS-ESI calculated for [M+H]+ 335, found 335.
Synthetic Route:
Compound 59-2 (70 mg, 0.305 mmol), compound 43-3 (200 mg, 0.961 mmol), potassium carbonate (126 mg, 0.914 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (24.9 mg, 30.5 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 17% to 37%, 6 min) to obtain the hydrochloride of compound 66. 1H NMR (400 MHz, CD3OD) δ 7.52-7.50 (m, 2H), 7.33 (s, 1H), 7.20-7.18 (m, 1H), 4.40-4.39 (m, 1H), 4.28-4.27 (m, 1H), 4.24-4.20 (m, 1H), 4.13-4.10 (m, 1H), 3.90-3.87 (m, 1H), 3.79-3.76 (m, 1H), 2.63 (s, 3H), 2.34 (s, 3H). MS-ESI calculated for [M+H]+ 358, found 358.
Synthetic Route:
Compound 60-2 (120 mg, 0.496 mmol), compound 43-2 (454 mg, 1.49 mmol), potassium carbonate (206 mg, 1.49 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (40.5 mg, 49.6 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred and reacted at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by thin-layer chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 67-1. MS-ESI calculated for [M+H]+ 384, found 384.
Compound 67-1 (125 mg, 202 μmol) was dissolved in anhydrous dichloromethane (5.00 mL), and boron tribromide (58.5 μL, 607 μmol) was slowly added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 12 hours. The reaction mixture was quenched with methanol (5.00 mL) at 0° C., and then concentrated under reduced pressure. The residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 23% to 43%, 31 min) to obtain the hydrochloride of compound 67. 1H NMR (400 MHz, CD3OD) δ 7.45 (d, J=8.4 Hz, 1H), 7.39 (s, 1H), 7.29 (s, 1H), 7.13 (d, J=8.0 Hz, 1H), 3.69-3.64 (m, 1H), 3.57-3.51 (m, 1H), 2.62 (s, 3H), 2.30 (s, 3H), 2.12-2.09 (m, 2H), 1.84-1.82 (m, 2H), 1.54-1.38 (m, 4H). MS-ESI calculated for [M+H]+ 370, found 370.
Synthetic Route:
Compound 68-1 (5 g, 19.6 mmol) was dissolved in anhydrous methanol (80 mL), and ammonia gas (5.67 g, 333 mmol) was introduced thereto at 0° C. for 20 minutes. Titanium tetraisopropoxide (11.1 g, 39.2 mmol) was added thereto, stirred at 20° C. for 12 hours, and the reaction mixture was cooled to 0° C., added with sodium borohydride (1.23 g, 32.5 mmol), stirred and reacted at 0° C. for 3 hours. The reaction was quenched by saturated potassium carbonate solution (10 mL) at 0° C., filtered and concentrated, and the crude product was purified by silica gel column chromatography (dichloromethane/methanol, 100/1 to 30/1, V/V) to obtain compound 68-2. 1H NMR (400 MHz, CD3OD) δ 3.96-3.93 (m, 1H), 3.60-3.54 (m, 3H), 3.51-3.48 (m, 1H), 2.14-2.09 (m, 1H), 1.69-1.65 (m, 2H), 1.63-1.58 (m, 1H), 1.55-1.50 (m, 2H), 1.45 (s, 9H). MS-ESI calculated for [M-Boc+H]+ 201, found 201.
Compound 2-2 (600 mg, 3.68 mmol), compound 68-2 (1.08 g, 4.21 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (426 mg, 0.736 mmol), cesium carbonate (2.40 g, 7.36 mmol), and palladium acetate (83 mg, 0.370 mmol) were dissolved in 1,4-dioxane (20 mL), and the reaction mixture was stirred and reacted at 90° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (dichloromethane/methanol, 100/1 to 20/1, V/V) to obtain compound 68-3. 1H NMR (400 MHz, CDCl3) δ 6.44 (d, J=0.8 Hz, 1H), 4.68 (s, 1H), 4.51 (s, 1H), 4.08-4.05 (m, 1H), 3.71-3.68 (m, 1H), 3.55-3.52 (m, 2H), 3.30-3.23 (m, 2H), 2.22 (s, 3H), 2.19-2.15 (m, 1H), 1.68-1.63 (m, 2H), 1.61-1.57 (m, 1H), 1.48-1.44 (m, 1H), 1.39 (s, 9H). MS-ESI calculated for [M+H]+ 383, found 383.
Compound 68-3 (220 mg, 0.574 mmol) was dissolved in ethyl acetate (5 mL), and hydrogen chloride-ethyl acetate (4 mol/L, 5 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The reaction mixture was concentrated under reduced pressure to obtain the hydrochloride of compound 68-4, which was directly used in the next step without purification. 1H NMR (400 MHz, CD3OD) δ 7.48 (s, 1H), 4.46-4.41 (m, 1H), 4.19-4.15 (m, 1H), 4.01-3.98 (m, 1H), 3.31-3.29 (m, 4H), 2.48 (d, J=1.2 Hz, 3H), 2.44-2.39 (m, 1H), 2.06-2.01 (m, 4H), 1.95-1.87 (m, 1H). MS-ESI calculated for [M+H]+ 283, found 283.
The hydrochloride of compound 68-4 (185 mg, 0.579 mmol) and 37% formaldehyde aqueous solution (216 μL, 2.90 mmol) were dissolved in dichloromethane (4 mL) and methanol (2 mL). The reaction mixture was stirred at 25° C. for 1 hour, and sodium triacetoxyborohydride (185 mg, 0.873 mmol) was added thereto. The reaction mixture was stirred at 25° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the crude product was layered in saturated sodium carbonate aqueous solution (20 mL) and ethyl acetate (20 mL). The aqueous phase was extracted with ethyl acetate (20 mL×1), and the combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain compound 68-5, which was directly used in the next step without purification. MS-ESI calculated for [M+H]+ 297, found 297.
Compound 68-5 (143 mg, 0.482 mmol), compound 26-1 (187 mg, 0.964 mmol), potassium carbonate (200 mg, 1.45 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (39.3 mg, 48.2 μmol) were dissolved in 1,4-dioxane (6 mL) and water (0.6 mL), and the reaction mixture was stirred and reacted at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 1% to 30%, 6 min), and then purified by preparative high performance liquid chromatography (DAICEL CHIRALPAK IE 250×30 mm×3 μm; mobile phase: n-hexane; gradient: 0.1% ammonia water-ethanol solution 85% to 85%, 15 min) to obtain compounds 68a and 68b. The e.e. % values were then measured by SFC (Chiralpak IE-3 50 mm×4.6 mm×3 μm; mobile phase: phase A was n-hexane, phase B was ethanol solution containing 0.05% diethylamine; gradient: phase B 70% to 70%).
Compound 68a: e.e. %=100%, RT=2.030 min. 1H NMR (400 MHz, CD3OD) δ 7.61 (d, J=5.6 Hz, 1H), 7.34 (d, J=5.6 Hz, 1H), 7.29 (d, J=8.4 Hz, 1H), 7.17 (d, J=8.4 Hz, 1H), 6.81 (s, 1H), 4.65-4.59 (m, 1H), 4.23-4.19 (m, 1H), 3.79-3.76 (m, 1H), 2.55-2.47 (m, 4H), 2.34-2.32 (m, 1H), 2.30 (s, 3H), 2.23 (s, 3H), 1.93-1.78 (m, 3H), 1.76-1.69 (m, 1H). MS-ESI calculated for [M+H]+ 411, found 411.
Compound 68b: e.e. %=99.6%, RT=5.604 min. 1H NMR (400 MHz, CD3OD) δ 7.61 (d, J=5.6 Hz, 1H), 7.50-7.48 (m, 2H), 7.26 (d, J=8.0 Hz, 1H), 6.85 (s, 1H), 4.66-4.60 (m, 1H), 4.23-4.19 (m, 1H), 3.80-3.76 (m, 1H), 2.54-2.44 (m, 4H), 2.34-2.32 (m, 1H), 2.30 (s, 3H), 2.23 (s, 3H), 1.92-1.80 (m, 3H), 1.77-1.70 (m, 1H). MS-ESI calculated for [M+H]+ 411, found 411.
Compound 69-1 (800 mg, 4.30 mmol) was dissolved in tetrahydrofuran (5 mL), and formaldehyde aqueous solution (3.49 g, 42.95 mmol, purity: 37%) was added thereto. The reaction mixture was stirred at 70° C. for 12 hours. Then sodium triacetoxyborohydride (1.82 g, 8.59 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was directly concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 69-2. 1H NMR (400 MHz, CD3OD) δ 4.25-4.18 (m, 1H), 3.30-3.25 (m, 2H), 3.08-3.01 (m, 2H), 2.72 (s, 3H), 2.40-2.31 (m, 1H), 1.90-1.87 (m, 1H), 1.44 (s, 9H).
Compound 69-2 (700 mg, 3.50 mmol) was dissolved in ethyl acetate (5 mL) and methanol (5 mL), and hydrogen chloride-ethyl acetate (4 mol/L, 5 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 2 hours. The reaction mixture was directly concentrated to obtain the hydrochloride of compound 69-3, which was directly used in the next step without purification. MS-ESI calculated for [M+H]+ 101, found 101.
The hydrochloride of compound 69-3 (436 mg, 2.52 mmol) was dissolved in 1,4-dioxane (10 mL), and then compound 2-2 (410 mg, 2.52 mmol), tris(dibenzylideneacetone)dipalladium (231 mg, 252 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (292 mg, 504 μmol), and cesium carbonate (3.69 g, 11.3 mmol) were added thereto. The system was replaced with nitrogen three times, and stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 69-4. MS-ESI calculated for [M+H]+ 227, found 227.
Compound 69-4 (200 mg, 335 μmol) was dissolved in dioxane (2 mL) and water (0.4 mL). Intermediate 26-1 (97.6 mg, 503 μmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (24.5 mg, 33.5 μmol), and potassium carbonate (116 mg, 838 μmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 69. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 30%, 10 min) to obtain the hydrochloride of compound 69. 1H NMR (400 MHz, CD3OD) δ 7.72-7.63 (m, 4H), 7.30 (d, J=7.6 Hz, 1H), 4.73-4.69 (m, 1H), 4.17-3.82 (m, 2H), 3.52-3.44 (m, 1H), 3.28-3.22 (m, 1H), 3.06-3.01 (m, 3H), 2.82-2.48 (m, 1H), 2.36 (s, 3H), 2.28-2.19 (m, 1H). MS-ESI calculated for [M+H]+ 341, found 341.
Synthetic Route:
Compound 70-1 (1.00 g, 4.23 mmol) was dissolved in 1,4-dioxane (15 mL), and then compound 2-2 (897 mg, 5.50 mmol), tris(dibenzylideneacetone)dipalladium (388 mg, 423 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (490 mg, 847 μmol), and cesium carbonate (3.45 g, 10.6 mmol) were added thereto. The system was replaced with nitrogen three times, and stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 70-2. MS-ESI calculated for [M+H]+ 363, found 363.
Compound 70-2 (680 mg, 1.87 mmol) was dissolved in ethyl acetate (5 mL), and hydrogen chloride-ethyl acetate (4 mol/L, 15 mL) was added thereto, and the reaction mixture was stirred at 25° C. for 1 hour. The reaction mixture was directly concentrated to obtain the hydrochloride of compound 70-3, which was directly used in the next step without purification. MS-ESI calculated for [M+H]+ 263, found 263.
Compound 70-3 (560 mg, 2.13 mmol) was dissolved in tetrahydrofuran (3 mL), and formaldehyde aqueous solution (1.73 g, 21.3 mmol, purity: 37%) was added thereto. The reaction mixture was stirred at 70° C. for 2 hours. Then sodium triacetoxyborohydride (904 mg, 4.26 mmol) was added thereto at 0° C., and the reaction mixture was stirred at 25° C. for 0.5 hours. The pH of the reaction mixture was neutralized to 8 with saturated sodium bicarbonate solution, and the reaction mixture was directly concentrated under reduced pressure. The crude product was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 70-4. MS-ESI calculated for [M+H]+ 277, found 277.
Compound 70-4 (220 mg, 795 μmol) was dissolved in dioxane (3 mL) and water (0.6 mL). Intermediate 26-1 (216 mg, 1.11 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (58.2 mg, 79.5 μmol), and potassium carbonate (275 mg, 1.99 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V). The crude product was purified by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 1% to 30%, 10 min), and then separated by SFC (separation column: DAICEL CHIRALCEL OJ 250 mm×30 mm×10 μm; mobile phase: 0.1% ammonia water-ethanol; gradient: ethanol 30% to 30%) to obtain compounds 70a and 70b. The e.e. % values were then measured by SFC (Chiralcel OJ-3 100 mm×4.6 mm×3 μm; mobile phase: phase A was supercritical CO2, phase B was ethanol solution containing 0.05% diethylamine; gradient: phase B 5% to 40%).
Compound 70a: e.e. %=96.1%, RT=3.508 min. 1H NMR (400 MHz, CD3OD) δ 7.59 (d, J=5.6 Hz, 1H), 7.50-7.48 (m, 2H), 7.24 (d, J=8.4 Hz, 1H), 6.83 (s, 1H), 4.44 (s, 1H), 3.02-3.00 (m, 1H), 2.89-2.81 (m, 1H), 2.61-2.52 (m, 1H), 2.45-2.42 (m, 1H), 2.39 (s, 3H), 2.31-2.26 (m, 1H), 2.20 (s, 3H), 2.03-1.90 (m, 1H). MS-ESI calculated for [M+H]+ 391, found 391.
Compound 70b: e.e. %=87.2%, RT=3.647 min. 1H NMR (400 MHz, CD3OD) δ 7.60 (d, J=5.6 Hz, 1H), 7.52-7.51 (m, 2H), 7.33-7.24 (m, 1H), 6.94 (s, 1H), 4.43 (s, 1H), 3.04-3.02 (m, 1H), 2.92-2.84 (m, 1H), 2.65-2.55 (m, 1H), 2.48-2.44 (m, 1H), 2.41 (s, 3H), 2.34-2.29 (m, 1H), 2.22 (s, 3H), 2.04-1.94 (m, 1H). MS-ESI calculated for [M+H]+ 391, found 391.
Synthetic Route
Compound 7-2 (521 mg, 2.06 mmol), compound 26-1 (200 mg, 1.03 mmol), potassium carbonate (138 mg, 2.06 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (151 mg, 206 μmol) were dissolved in 1,4-dioxane (10 mL) and water (2 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (Xtimate C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 20% to 50%, 10 min) to obtain the hydrochloride of compound 71. 1H NMR (400 MHz, CD3OD) δ 7.86-7.60 (m, 4H), 7.31 (d, J=8.3 Hz, 1H), 4.54-4.31 (m, 1H), 3.92 (t, J=10.8 Hz, 1H), 3.57-3.36 (m, 6H), 2.50 (d, J=2.8 Hz, 1H), 2.38 (s, 3H), 2.15 (d, J=6.9 Hz, 2H), 2.02 (s, 1H). MS-ESI calculated for [M+H]+ 367, found 367.
Synthetic Route:
Compound 72-1 (1.00 g, 5.65 mmol) was dissolved in 1,4-dioxane (5 mL), and compound 2-1 (1.29 g, 11.3 mmol), palladium acetate (127 mg, 565 μmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (654 mg, 1.13 mmol), and cesium carbonate (4.60 g, 14.1 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 72-3. MS-ESI calculated for [M+H]+ 255, found 255.
Compound 72-3 (200 mg, 785 μmol) was dissolved in dioxane (20 mL) and water (4 mL), and intermediate 26-1 (228 mg, 1.18 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (57.4 mg, 78.5 μmol), and potassium carbonate (271 mg, 1.96 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 4 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 72. The crude product was separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 72. 1H NMR (400 MHz, CD3OD) δ 7.71-7.66 (m, 3H), 7.29 (d, J=7.2 Hz, 1H), 4.55 (s, 1H), 3.85-3.78 (m, 1H), 3.57-3.54 (m, 1H), 3.16-3.01 (m, 2H), 2.95-2.87 (m, 3H), 2.62-2.47 (m, 3H), 2.32 (s, 3H), 2.26-2.12 (m, 2H), 2.04-1.80 (m, 2H). MS-ESI calculated for [M+H]+ 369, found 369.
Synthetic Route:
Compound 72-1 (1.00 g, 5.65 mmol) was dissolved in 1,4-dioxane (2 mL), and then compound 60-1 (976 mg, 8.47 mmol), tris(dibenzylideneacetone)dipalladium (517 mg, 565 mol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (654 mg, 1.13 mmol), and cesium carbonate (4.60 g, 14.12 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 100° C. for 12 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/1 to 10/1, V/V) to obtain compound 73-1. MS-ESI calculated for [M+H]+ 256, found 256.
Compound 73-1 (187 mg, 731 μmol) was dissolved in dioxane (5 mL) and water (1 mL), and intermediate 26-1 (199 mg, 1.02 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (53.5 mg, 73.1 μmol), and potassium carbonate (253 mg, 1.83 mmol) were added thereto. The system was replaced with nitrogen three times, and the reaction mixture was stirred at 90° C. for 4 hours. The reaction mixture was directly concentrated under reduced pressure, and the residue was separated by silica gel column chromatography (dichloromethane/methanol, 100/0 to 10/1, V/V) to obtain the crude product of compound 73. The crude product was then separated by preparative high performance liquid chromatography (chromatographic column: Phenomenx C18 150×40 mm×5 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile: 5% to 35%, 10 min) to obtain the hydrochloride of compound 73. 1H NMR (400 MHz, CD3OD) δ 7.66-7.60 (m, 3H), 7.24-7.21 (d, J=8.4 Hz, 1H), 3.91-3.85 (m, 1H), 3.72-3.65 (m, 1H), 2.41 (s, 3H), 2.27 (s, 3H), 2.11-2.10 (m, 2H), 1.82-1.81 (m, 2H), 1.56-1.37 (m, 4H). MS-ESI calculated for [M+H]+ 370, found 370.
Synthetic Route:
Compound 74-1 (5.00 g, 38.3 mmol) was dissolved in dichloromethane (50.0 mL), and trifluoromethanesulfonic anhydride (8.22 mL, 49.8 mmol) and pyridine (6.18 mL, 76.6 mmol) were added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 100/0 to 1/1, V/V) to obtain compound 74-2. MS-ESI calculated for [M+H]+ 263, found 263.
Compound 74-2 (500 mg, 1.90 mmol), the hydrochloride of compound 2-1 (429 mg, 2.85 mmol), and N,N-diisopropylethylamine (1.32 mL, 7.60 mmol) were dissolved in N,N-dimethylformamide (5.00 mL), and the reaction mixture was stirred at 100° C. for 1 hour. The reaction mixture was dried under reduced pressure with an oil pump, and the residue was diluted with dichloromethane (20.0 mL). The mixture was eluted by silica gel column chromatography (dichloromethane/methanol, 100/0 to 1/1, V/V), and the filtrate was collected and evaporated to dryness by rotary evaporation to obtain compound 74-3. MS-ESI calculated for [M+H]+ 227, found 227.
Compound 74-3 (430 mg, 1.90 mmol), compound 26-1 (740 mg, 3.81 mmol), potassium carbonate (786 mg, 5.69 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (155 mg, 190 μmol) were dissolved in 1,4-dioxane (30.0 mL) and water (3.00 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (chromatographic column: Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 20% to 44%, 9 min) to obtain the hydrochloride of compound 74. 1H NMR (400 MHz, CD3OD) δ 8.42-8.36 (m, 1H), 7.72-7.71 (m, 1H), 7.65-7.57 (m, 4H), 4.39-4.32 (m, 1H), 3.89-3.85 (m, 1H), 3.57-3.54 (m, 1H), 3.07-3.00 (m, 1H), 2.96 (s, 2H), 2.90 (s, 1H), 2.30-2.26 (m, 1H), 2.18-2.13 (m, 1H), 2.03-2.00 (m, 2H), 1.73-1.62 (m, 1H). MS-ESI calculated for [M+H]+ 341, found 341.
Synthetic Route:
Compound 74-2 (500 mg, 1.90 mmol), compound 60-1 (329 mg, 2.86 mmol), and N,N-diisopropylethylamine (0.663 mL, 3.81 mmol) were dissolved in N,N-dimethylformamide (5.00 mL), and the reaction mixture was stirred and reacted at 100° C. for 1 hour. The reaction was quenched with water (5.00 mL), and the reaction mixture was extracted with ethyl acetate (5.00 mL×3), then washed with water (5.00 mL×2) and saturated brine (5.00 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane/methanol, 20/1, V/V) to obtain compound 75-1. MS-ESI calculated for [M+H]+ 228, found 228.
Compound 75-1 (67.0 mg, 0.294 mmol), compound 26-1 (115 mg, 0.591 mmol), potassium carbonate (122 mg, 0.883 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (24.0 mg, 29.4 μmol) were dissolved in 1,4-dioxane (4.00 mL) and water (0.40 mL), and the reaction mixture was stirred at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (chromatographic column: Phenomenex Luna C18 75×30 mm×3 μm; mobile phase: 0.05% hydrochloric acid aqueous solution-acetonitrile; gradient: acetonitrile 20% to 42%, 9 min) to obtain the hydrochloride of compound 75. 1H NMR (400 MHz, CD3OD) δ 8.36 (d, J=10.0 Hz, 1H), 7.72 (d, J=8.4 Hz, 1H), 7.64 (d, J=4.8 Hz, 1H), 7.55-7.53 (m, 2H), 7.49 (d, J=10.0 Hz, 1H), 3.71-3.65 (m, 1H), 3.55-3.52 (m, 1H), 2.13-2.07 (m, 2H), 1.84-1.81 (m, 2H), 1.48-1.41 (m, 4H). MS-ESI calculated for [M+H]+ 342, found 342.
Synthetic Route:
Compound 76-1 (4.00 g, 27.7 mmol) was dissolved in dichloromethane (40.0 mL), and trifluoromethanesulfonic anhydride (5.94 mL, 36.0 mmol) and pyridine (4.47 mL, 55.3 mmol) were added dropwise thereto at 0° C. The reaction mixture was stirred and reacted at 25° C. for 12 hours. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (1/3, petroleum ether/ethyl acetate, Rf=0.36) to obtain compound 76-2. 1H NMR (400 MHz, CDCl3) δ 7.57 (s, 1H), 2.45 (s, 3H). MS-ESI calculated for [M+H]+ 277, found 277.
Compound 76-2 (500 mg, 1.77 mmol), compound 60-1 (305 mg, 2.65 mmol), and N,N-diisopropylethylamine (0.615 mL, 3.53 mmol) were dissolved in dimethylformamide (0.500 mL), and the reaction mixture was stirred and reacted at 100° C. for 1 hour. The reaction was quenched with water (1.00 mL), and the reaction mixture was extracted with ethyl acetate (3.00 mL×3), then washed with water (3.00 mL×2) and saturated brine (3.00 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (10/1, dichloromethane/methanol, Rf=0.40) to obtain compound 76-3. MS-ESI calculated for [M+H]+ 242, found 242.
Compound 76-3 (60.0 mg, 0.248 mmol), compound 26-1 (96.8 mg, 0.499 mmol), potassium carbonate (103 mg, 0.745 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (20.3 mg, 24.8 μmol) were dissolved in 1,4-dioxane (3.00 mL) and water (0.30 mL), and the reaction mixture was stirred and reacted at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase A: 0.05% hydrochloric acid aqueous solution; mobile phase B: acetonitrile; B %: 20% to 50%, 10 min) to obtain the hydrochloride of compound 76. 1H NMR (400 MHz, CD3OD) δ 8.30 (s, 1H), 7.72 (d, J=8.8 Hz, 1H), 7.65 (d, J=5.6 Hz, 1H), 7.58-7.56 (m, 2H), 3.83-3.80 (m, 1H), 3.70-3.63 (m, 1H), 2.48 (s, 3H), 2.12-2.10 (m, 2H), 1.84-1.82 (m, 2H), 1.45-1.41 (m, 2H), 1.30-1.29 (m, 2H). MS-ESI calculated for [M+H]+ 356, found 356.
Synthetic Route:
Compound 76-2 (500 mg, 1.77 mmol), compound 2-1 (399 mg, 2.65 mmol), and N,N-diisopropylethylamine (1.23 mL, 7.06 mmol) were dissolved in dimethylformamide (0.500 mL), and the reaction mixture was stirred and reacted at 100° C. for 1 hour. The reaction was quenched with water (1.00 mL), and the reaction mixture was extracted with ethyl acetate (3.00 mL×3), then washed with water (3.00 mL×2) and saturated brine (3.00 mL×1), and the organic phase was dried over anhydrous sodium sulfate, filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by thin-layer chromatography (10/1, dichloromethane/methanol, Rf=0.40) to obtain compound 77-1. MS-ESI calculated for [M+H]+ 241, found 241.
Compound 77-1 (110 mg, 0.457 mmol), compound 26-1 (178 mg, 0.918 mmol), potassium carbonate (189 mg, 1.37 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (37.3 mg, 45.7 μmol) were dissolved in 1,4-dioxane (6.00 mL) and water (0.60 mL), and the reaction mixture was stirred and reacted at 100° C. for 12 hours under nitrogen atmosphere. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure, and the residue was purified by preparative high performance liquid chromatography (3_Phenomenex Luna C18 75×30 mm×3 μm; mobile phase A: 0.05% hydrochloric acid aqueous solution; mobile phase B: acetonitrile; B %: 14% to 34%, 8 min) to obtain the hydrochloride of compound 77. 1H NMR (400 MHz, CD3OD) δ 8.28 (s, 1H), 7.73 (d, J=5.2 Hz, 1H), 7.67-7.65 (m, 2H), 7.58 (d, J=8.4 Hz, 1H), 4.57-4.46 (m, 1H), 3.86-3.81 (m, 1H), 3.60-3.55 (m, 1H), 3.06-3.00 (m, 1H), 2.97 (s, 3H), 2.93-2.91 (m, 1H), 2.50 (s, 3H), 2.28-2.15 (m, 2H), 2.02-1.95 (m, 1H), 1.84-1.74 (m, 1H). MS-ESI calculated for [M+H]+ 355, found 355.
Biological Activity Test:
The chemical names and structural formulas of the compounds of the present disclosure for experimental use are shown in the preparation examples for each compound.
1. Experimental principle: This experiment utilized the human-derived monocyte cell line THP1 to investigate the inhibitory activity (IC50) of NLRP3 inhibitor on cellular IL-1β secretion. PMA (12-O-tetradecanoylphorbol-13-acetate) was used to differentiate the monocyte cell line THP1 into mature macrophages, which were then stimulated using LPS (lipopolysaccharide), an agonist of the Toll-like receptor TLR4, to activate the transcriptional activity of the inflammasome NLRP3 and the expression of pro-IL-1β, a precursor of IL-1β. At this time, the inhibitor of NLRP3 was added, and then ATP (adenosine triphosphate) was added to further mature and activate NLRP3, and activate downstream caspase-1. Activated caspase-1 may enzymatically process pro-IL-1β into mature IL-1β that can be secreted. The NLRP3 inhibitor can effectively inhibit the ATP-induced maturation and activation of NLRP3, and the activation of downstream caspase-1, thereby inhibiting the maturation and secretion of JIL-1β.
2. Experimental Materials:
2.1 Reagents: as shown in Table 2 Below.
2.2 Instruments:
Flow Cytometer, Supplier: BD, article number or serial number: LSRFortessa.
3. Experimental Steps:
(1) The density of THP1 cells was adjusted to 5×105 cells/mL, then PMA was added, and the final concentration was adjusted to 100 ng/mL. The cells were inoculated 200 μL/well into a 96-well flat-bottom plate, stimulated overnight (<16 hours if possible) at 37° C. and 5% CO2.
(2) The supernatant was discarded the next day, and then the cells were carefully washed twice with Dulbecco's phosphate-buffered saline (200 μL/time).
(3) The cells were stimulated with LPS at a final concentration of 100 ng/mL, added to a 96-well plate (200 μL/well), and cultured at 37° C. and 5% CO2 for 3 hours.
(4) The test compounds were added to the wells, and the screening concentrations were 5 μM, 1 μM, 200 nM, 40 nM, 8 nM, 1.6 nM, 0.32 nM, and 0.064 nM, respectively. The cells were incubated for 1 hour in a 37° C., 5% CO2 incubator.
(5) ATP was added to each well with a final concentration of 5 mM, and cultured overnight (>18 hours) at 37° C. and 5% CO2.
(6) On the third day, 5 μL of the supernatant was taken, diluted 10-fold, and the content of IL-1β in the supernatant was detected by cytometric bead array (CBA).
4. The experimental results are shown in Table 3:
Conclusion: The compounds of the present disclosure have significant inhibitory activity on the maturation and secretion of IL-1β in THP-1 cells.
Experimental purpose: To test the in vivo pharmacokinetics of the compounds in CD-1 mice
Experimental Materials:
CD-1 mice (male, 7 to 9 weeks old)
Experimental Operation:
The rodent pharmacokinetic characteristics after intravenous injection and oral administration of the compounds were tested using a standard protocol. The candidate compound was prepared as a clear solution during the experiment and given to mice for single intravenous injection and oral administration. The vehicle for intravenous injection and oral administration was a mixed vehicle composed of 5% dimethyl sulfoxide and 95% 5% solutol. Four male CD-1 mice were used in this project. Two mice were administered intravenously (IV), and plasma samples were collected at 0 hours (before administration) and 0.0833, 0.25, 0.5, 1, 2, 4, 8, and 24 hours after administration. The other two mice were administered orally by gavage (PO), and plasma samples were collected at 0 hours (before administration) and 0.25, 0.5, 1, 2, 4, 8, and 24 hours after administration. The plasma concentration was quantitatively analyzed by LC-MS/MS analysis method, and the pharmacokinetic parameters were calculated, such as peak concentration (Cmax), clearance rate (CL), half-life (T1/2), tissue distribution (Vdss), area under drug-time curve (AUC0-last), bioavailability (F).
The experimental results are shown in Table 4:
Conclusion: The compounds of the present disclosure have good in vivo pharmacokinetic properties in CD-1 mice, including good oral bioavailability, oral exposure, half-life, and clearance rate, etc.
Experimental Purpose: To Test the In Vivo Pharmacokinetics of the Compounds in SD Rats
Experimental Materials:
SD rats (male, 150 to 180 g)
Experimental Operation:
The rodent pharmacokinetic characteristics after intravenous injection and oral administration of the compounds were tested using a standard protocol. The candidate compound was prepared as a clear solution during the experiment and given to SD rats for single intravenous injection and oral administration. The vehicle for intravenous injection and oral administration was a mixed vehicle composed of 5% dimethyl sulfoxide and 95% 5% solutol. Four male SD rats were used in this project. Two SD rats were administered intravenously, and plasma samples were collected at 0.083, 0.25, 0.5, 1, 2, 4, 8, and 24 hours after administration. The other two SD rats were administered orally by gavage, and plasma samples were collected at 0.25, 0.5, 1, 2, 4, 8, and 24 hours after administration. The plasma concentration was quantitatively analyzed by LC-MS/MS analysis method, and the pharmacokinetic parameters were calculated, such as peak concentration (Cmaz), clearance rate (CL), half-life (T1/2), tissue distribution (Vdss), area under drug-time curve (AUC0-last), bioavailability (F). The experimental results are shown in Table 5:
Conclusion: The compounds of the present disclosure have good in vivo pharmacokinetic properties in SD rats, including good oral bioavailability, oral exposure, half-life, and clearance rate, etc.
Experimental purpose: To detect the effect of the compounds to be tested on the hERG potassium channel by an automated patch clamp method.
Experimental Methods
1. Cell Culture
1.1 CHO-hERG cells were cultured in a 175 cm2 culture flask. When the cell density reached 60 to 80%, the culture medium was removed, and the cells were washed once with 7 mL of PBS (phosphate buffered saline), and then digested with 3 mL of digestion solution.
1.2 After the digestion was completed, 7 mL of culture medium was added to neutralize, then the mixture was centrifuged, and the supernatant was aspirated, and then 5 mL of culture medium was added to re-suspend, ensuring 2 to 5×106/mL of cell density.
2. The solutions were prepared as shown in Table 6:
3. Electrophysiological Recording Process
The process of single cell high impedance sealing and whole cell mode formation were all automatically completed by Qpatch instrument, after obtaining the whole cell recording mode, the cells were clamped at −80 mV, before giving a 5-second +40 mV depolarization stimulus, a 50 millisecond −50 mV prevoltage was given first, and then repolarized to −50 mV for 5 seconds, then returned to −80 mV This voltage stimulation was applied every 15 seconds and after recording for 2 minutes, extracellular fluid was recordings for 5 minutes, and then the administration process was started. The compound concentration was given from the lowest test concentration, each test concentration was given for 2.5 minutes, and 3 μM of Cisapride as the positive control compound was given after all concentrations were continuously given. At least 3 cells (n≥3) were tested at each concentration.
4. Compound Preparation
4.1 The mother solution of the compound was diluted with DMSO, and 10 μL of mother solution of the compound was added to 20 μL of DMSO solution, and was 3-fold diluted continuously to 6 DMSO concentrations.
4.2 4 μL of compounds with 6 DMSO concentrations were added to 396 μL of extracellular fluid, 100-fold diluted to 6 intermediate concentrations, and then 80 μL of the compounds with 6 intermediate concentrations were added to 320 μL of extracellular fluid, 5-fold diluted to the final concentration to be tested.
4.3 The highest test concentration was 40.00 μM, in a total of 6 concentrations of 40.00, 13.33, 4.44, 1.48, 0.49, and 0.16 μM respectively.
4.4 The content of DMSO in the final test concentration was not more than 0.2%, and this concentration of DMSO had no effect on hERG potassium channel.
4.5 The whole dilution process of compound preparation was completed by Bravo instrument.
5. Data Analysis
The experimental data were analyzed by GraphPad Prism 5.0 software.
6. Test Results
The results of the IC50 values of the compounds on the hERG potassium ion channel are shown in Table 7.
Conclusion: The compounds of the present disclosure have no significant inhibitory effect on hERG potassium channels.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110172932.4 | Feb 2021 | CN | national |
| 202110875431.2 | Jul 2021 | CN | national |
| 202110962973.3 | Aug 2021 | CN | national |
| 202111162651.7 | Sep 2021 | CN | national |
| 202111466804.7 | Dec 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/075004 | 1/29/2022 | WO |
