Patent Application
20220177462
The present invention relates to the technical field of medicine, in particular, to a substituted heterocyclic amide compound, and its use as a RIPK1 inhibitor as well as a pharmaceutical composition prepared therefrom.
Receptor interacting protein 1 (RIP1) kinase is a serine/threonine protein kinase of the TKL family involved in innate immune signaling. RIP1 kinase is a protein containing RHIM domain with an N-terminal kinase domain and a C-terminal death domain ((2005) Trends Biochem. Sci. 30, 151-159). The RIP1 death domain mediates an interaction with another protein containing a death domain, including Fas and TNFR-1 ((1995) Cell 81 513-523), TRAIL-R1 and TRAIL-R2 ((1997) Immunity 7, 821-830) and TRADD ((1996) Immunity 4, 387-396), while the RHIM domain is critical for binding to another protein containing a RHIM domain, such as, TRIF ((2004) Nat Immunol. 5, 503-507), DAI ((2009) EMBO Rep. 10, 916-922) and RIP3 ((1999) J. Biol. Chem. 274, 16871-16875), (1999) Curr. Biol. 9, 539-542). A variety of effects are achieved through these interactions.
The effect of RIP1 on cell signaling has been evaluated under vinous conditions [including TLR3 ((2004) Nat Immunol. 5, 503-507), TLR4 ((2005) J. Biol. Chem. 280, 36560-36566), TRAIL (Cell Signal. 2015 February; 27(2):306-14), FAS ((2004) J. Biol. Chem. 279, 7925-7933)], but is best interpreted in a signaling mediated downstream the death receptor TNFR1 ((2003) Cell 114, 181-190). TNFR adaption is achieved through TNF, resulting in oligomerization, which recruits various proteins, including linear K63 linked polyubiquitinated RIP1 ((2006) Mol. Cell 22, 245-257), TRAF2/5 ((2010) J. Mol. Biol. 396, 528-539), TRADD ((2008) Nat. Immunol. 9, 1037-1046) and cIAPs ((2008) Proc. Natl. Acad. Sci. USA. 105, 11778-11783), to the cytoplasmic tail of the receptor. A RIP1-dependent complex acting as a scaffold protein (i.e., non-kinase-dependent) is called complex I, which provides a platform for pro-survival signaling pathway by activating the NFκB and MAP kinase pathways ((2010) Sci. Signal. 115, re4). Moreover, in a condition promoting the RIP1 deubiquitination, TNF binding to its receptor (inhibited by, such as, A20 and CYLD proteins or cIAP) will result in internalization of the receptor and formation of a complex II or DISC (death-inducing signaling complex) ((2011) Cell Death Dis. 2, e230). Formation of DISC (including RIP1, TRADD, FADD and Caspase 8) results in activation of Caspase 8, and starts a programmed apoptosis cell death in a non-RIP1 kinase-dependent manner ((2012) FEBS J 278, 877-887). Apoptosis is a static form of cell death to a great extent, which is involved in routine processes such as development and cell homeostasis.
In a condition under which DISC is formed and RIP3 is expressed, but apoptosis is inhibited (such as, deleting FADD/Caspase 8, inhibiting Caspase or infected by virus), it is possible that there is a third RIP1 kinase dependency. At present, RIP3 can enter such a complex, and is phosphorylated through RIP1, and starts a Caspase-independent programmed necrosis apoptosis through activation of MILK and PGAM5 ((2012) Cell 148, 213-227); ((2012) Cell 148, 228-243); ((2012) Proc. Natl. Acad. Sci. USA. 109, 5322-5327). In contrast to apoptosis, programmed necrosis (not to be confused with non-programmed passive necrosis) results in release of a risk-associated molecular pattern (DAMP) from the cell. These DAMP is capable of providing “risk signal” to surrounding cells and tissues, triggering a pro-inflammatory response including inflammasome activation, cytokine production, and cell recruitment ((2008 Nat. Rev. Immunol 8, 279-289).
Abnormal regulation of programmed cell death mediated by RIP1 kinase has been demonstrated to be associated with various types of inflammation by using RIP3 gene knockout mice (in which the RIP1-mediated programmed necrosis is completely blocked) and Necrostin-1 (a tool inhibitor of RIP1 kinase activity with poor oral bioavailability). RIP3 knockout mice have been shown to be protective against inflammatory bowel diseases (including ulcerative colitis and Crohn's disease) ((2011) Nature 477, 330-334), psoriasis ((2011) Immunity 35, 572-582), retinal detachment induced photoreceptor necrosis ((2010) PNAS 107, 21695-21700), retinitis pigmentosa ((2012) Proc. Natl. Acad. Sci., 109:36, 14598-14603), bombesin induced acute pancreatitis ((2009) Cell 137, 1100-1111), and sepsis/systemic inflammatory response syndrome (SIRS) ((2011) Immunity 35, 908-918). Necrostin-1 has been shown to be effective in alleviating ischemic brain injury ((2005) Nat. Chem. Biol. 1, 112-119), retinal ischemia/reperfusion injury ((2010) J. Neurosci. Res. 88, 1569-1576), Huntington's disease ((2011) Cell Death Dis. 2e115), renal ischemia reperfusion injury ((2012) Kidney Int. 81, 751-761), cisplatin-induced renal injury ((2012) Ren. Fail. 34, 373-377), and traumatic brain injury ((2012) Neurochem. Res. 37, 1849-1858). Other diseases or conditions regulated at least in part by RIP1-dependent apoptosis, necrosis, or cytokine production include malignancies of the blood and solid organs ((2013) Genes Dev. 27:1640-1649), bacterial and viral infections ((2014) Cell Host & Microbe 15, 23-35) (including but not limited to tuberculosis and influenza) ((2013) Cell 153, 1-14))), and lysosomal storage disorders (especially, Gaucher disease, Nature Medicine Advance Online Publication, Jan. 19, 2014, doi:10.1038/nm.3449).
Provided is an effective and selective small molecule RIP1 kinase activity inhibitor, which is capable of blocking RIP1-dependent cell necrosis, and thereby providing therapeutic effect for a disease or even associated with DAMP, cell death and/or inflammation.
The present invention provides a substituted heterocyclic amide compound, as a RIPK1 inhibitor, which is advantageous for its high activity, high selectivity and low toxic/side effect and the like.
In one respect, the present invention provides a benzothiazole-substituted heterocyclic amide compound, or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof, the compound has a structure as represented by formula (I):
wherein,
R0 is a substituted or unsubstituted C6-14 aryl, or substituted or unsubstituted C5-14 heteroaryl;
R1, R2, R3 are each independently hydrogen, hydroxy, halo, nitro, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy, substituted or unsubstituted C3-20 cycloalkyl, —(CH2)u—C3-6 monocyclic heterocyclyl, —(CH2)u-phenyl, —(CH2)u-5- or 6-membered monoheteroaryl, —(CH2)u—C3-8 monocyclic cycloalkyl, —SO2C1-6 alkyl, —(CH2)u—NRa0Rb0, —(CH2)u—C(O)NRa0Rb0, —C(O)C1-6 alkyl, —C(O)OC1-6 alkyl; wherein the phenyl, C3-8 monocyclic cycloalkyl, C3-6 monocyclic heterocyclyl, 5- or 6-membered monoheteroaryl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo, cyano, C1-3 alkyl, C1-3 alkoxy and C3-6 monocyclic cycloalkyl; u is 0, 1, 2, 3 or 4; Ra0, Rb0 are each independently hydrogen or C1-3 alkyl, or Ra0 and Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl, the C3-8 monocyclic heterocyclyl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo or C1-3 alkyl;
A has a structure as represented by formula (a) or formula (b)
wherein Z1, Z2 and “” are selected from the group consisting of:
(a1) Z1 is CRb, Z2 is N, and “” is a double bond; wherein Rb is hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(b1) Z1 is C(O), Z2 is NRc, and “” is a single bond; wherein Rc is hydrogen or substituted or unsubstituted C1-10 alkyl;
(c1) Z1 is CRb, Z2 is CRc, and “” is a single bond or a double bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(d1) Z1 is NRb, Z2 is CRc, and “” is a single bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(e1) Z1 is CRb, Z2 is NRc, and “” is a single bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(a2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(b2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(c2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(d2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(e2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(f2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(g2) R11, R12, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(h2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
in the above groups, the “substituted” means that 1, 2, 3 or 4 hydrogen atom(s) in the group are each independently substituted by a substituent selected from the group S consisting of: hydroxy, halo, nitro, oxo, C1-6 alkyl, hydroxy-substituted C1-6 alkyl, benzyl, —S—C1-6 alkyl, —S-halo C1-6 alkyl, —(CRa1Rb1)u-cyano, —(CRa1Rb1)u—C1-6 alkoxy, —(CRa1Rb1)u-halo C1-6 alkoxy, —(CRa1Rb1)u-halo C1-6 alkyl, —(CRa1Rb1)u—C3-6 monocyclic heterocyclyl, —(CRa1Rb1)u—C3-8 monocyclic cycloalkyl, —(CRa1Rb1)u-phenyl, —(CRa1Rb1)u-5- or 6-membered monoheteroaryl, —(CRa1Rb1)u—O—(CRa2Rb2)v-halo C1-6 alkyl, —(CRa1Rb1)u—O—(CRa2Rb2)v—C3-8 monocyclic cycloalkyl, —(CRa1Rb1)u—O—(CRa2Rb2)v—C3-6 monocyclic heterocyclyl, —(CRa1Rb1)u—O—(CRa2Rb2)v-phenyl, —(CRa1Rb1)u—O—(CRa2Rb2)v-5- or 6-membered monoheteroaryl, —(CRa1Rb1)u—S—(CRa2Rb2)v-phenyl, —(CRa1Rb1)u—SO2—(CRa2Rb2)v-phenyl, —(CRa1Rb1)u—O—C(O)NRa0Rb0, —(CRa1Rb1)u—O—(CRa2Rb2)v—C1-6 alkoxy, —(CRa1Rb1)u—O—(CRa2Rb2)vOH, —(CRa1Rb1)u—SO2C1-6alkyl, —(CRa1Rb1)u—SO2NRa0Rb0, —(CRa1Rb1)u—C(O)NRa0Rb0, —(CRa1Rb1)u—NRa0Rb0, —(CRa1Rb1)u—C(O)C1-6 alkyl, —C(O)OC1-6 alkyl, NRa0C(O)—(CRa1Rb1)u—NRa0Rb0, NRa0C(O)—(CRa1Rb1)uOH, NRa0C(O)-halo C1-6 alkyl; wherein the C3-8 monocyclic cycloalkyl, C3-6 monocyclic heterocyclyl, phenyl, 5- or 6-membered monoheteroaryl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of hydroxy, hydroxymethyl, hydroxyethyl, halo, cyano, cyanomethyl, cyanoethyl, C1-3 alkyl, C1-3 alkoxy and C3-6 monocyclic cycloalkyl;
u, v are each independently 0, 1, 2, 3 or 4;
Ra0, Rb0 are each independently hydrogen or C1-3 alkyl; or Ra0, Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl, the C3-8 monocyclic heterocyclyl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo or C1-3 alkyl;
Ra1, Rb1, Ra2, Rb2 are the same or different, and are each independently hydrogen, hydroxyl or C1-3 alkyl.
In another respect, the present invention provides a pyridotriazole-substituted heterocyclic amide compound or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof, the compound has a structure as represented by formula (II):
wherein,
R0 is a substituted or unsubstituted C6-14 aryl, or a substituted or unsubstituted C5-14 heteroaryl;
R1, R2, R3 are each independently hydrogen, hydroxy, halo, nitro, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy, substituted or unsubstituted C3-20 cycloalkyl, —(CH2)u—C3-6 monocyclic heterocyclyl, —(CH2)u-phenyl, —(CH2)u-5- or 6-membered monoheteroaryl, —(CH2)u—C3-8 monocyclic cycloalkyl, —SO2C1-6 alkyl, —(CH2)u—NRa0Rb0, —(CH2)uC(O)NRa0Rb0, —C(O)C1-6 alkyl, —C(O)OC1-6 alkyl; wherein the phenyl, C3-8 monocyclic cycloalkyl, C3-6 monocyclic heterocyclyl, 5- or 6-membered monoheteroaryl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo, cyano, C1-3 alkyl, C1-3 alkoxy and C3-6 monocyclic cycloalkyl; u is 0, 1, 2, 3 or 4; Ra0, Rb0 are each independently hydrogen or C1-3 alkyl, or Ra0 and Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl, the C3-8 monocyclic heterocyclyl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo or C1-3 alkyl;
B has a structure as represented by formula (II-a) or formula (II-b)
wherein W1, W2 and “” are selected from the group consisting of:
(a1) W1 is C(O), W2 is NRc, and “” is a single bond; wherein Rc is hydrogen, or substituted or unsubstituted C1-10 alkyl;
(b1) W1 is CRb, W2 is CRc, and “” is a single bond or a double bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(c1) W1 is NRb, W2 is CRc, and “” is a single bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(d1) W1 is CRb, W2 is NRc, and “” is a single bond; wherein Rb, Rc together with the ring attached thereto form a substituted or unsubstituted 9- or 10-membered biheteroaryl fused ring;
(a2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(b2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(c2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(d2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(e2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(f2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
(g2) R11, R12, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(h2) Rd′ are each independently hydrogen, halo, substituted or unsubstituted C1-10 alkyl, substituted or unsubstituted C1-10 alkoxy or NRa0Rb0;
in the above groups, the “substituted” means that 1, 2, 3 or 4 hydrogen atom(s) in the group are substituted by a substituent each independently selected from the group S consisting of: hydroxy, halo, nitro, oxo, C1-6 alkyl, hydroxy-substituted C1-6 alkyl, benzyl, —S—C1-6 alkyl, —S-halo C1-6 alkyl, —(CRa1Rb1)u-cyano, —(CRa1Rb1)u—C1-6 alkoxy, —(CRa1Rb1)u-halo C1-6 alkoxy, —(CRa1Rb1)u-halo C1-6 alkyl, —(CRa1Rb1)u—C3-6 monocyclic heterocyclyl, —(CRa1Rb1)u—C3-8 monocyclic cycloalkyl, —(CRa1Rb1)u-phenyl, —(CRa1Rb1)u-5- or 6-membered monoheteroaryl, —(CRa1Rb1)u—O—(CRa2Rb2)v-halo C1-6 alkyl, —(CRa1Rb1)u—O—(CRa2Rb2)v—C3-8 monocyclic cycloalkyl, —(CRa1Rb1)u—O—(CRa2Rb2)v—C3-6 monocyclic heterocyclyl, —(CRa1Rb1)u—O—(CRa2Rb2)v-phenyl, —(CRa1Rb1)u—O—(CRa2Rb2)v-5- or 6-membered monoheteroaryl, —(CRa1Rb1)u—S—(CRa2Rb2)v-phenyl, —(CRa1Rb1)u— SO2—(CRa2R62)v— phenyl, —(CRa1Rb1)u—O—C(O)NRa0Rb0, —(CRa1Rb1)u—O—(CRa2Rb2)v—C1-6 alkoxy, —(CRa1Rb1)u—O—(CRa2Rb2)vOH, —(CRa1Rb1)u—SO2C1-6 alkyl, —(CRa1Rb1)u—SO2NRa0Rb0, —(CRa1Rb1)u—C(O)NRa0Rb0, —(CRa1Rb1)u—NRa0Rb0, —(CRa1Rb1)u—C(O)C1-6 alkyl, —C(O)OC1-6 alkyl, NRa0C(O)—(CRa1Rb1)u—NRa0Rb0, NRa0C(O)—(CRa1Rb1)uOH, NRa0C(O)-halo C1-6 alkyl; wherein the C3-8 monocyclic cycloalkyl, C3-6 monocyclic heterocyclyl, phenyl, 5- or 6-membered monoheteroaryl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of hydroxy, hydroxymethyl, hydroxyethyl, halo, cyano, cyanomethyl, cyanoethyl, C1-3 alkyl, C1-3 alkoxy and C3-6 monocyclic cycloalkyl;
u, v are each independently 0, 1, 2, 3 or 4;
Ra0, Rb0 are each independently hydrogen or C1-3 alkyl; or Ra0, Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl, the C3-8 monocyclic heterocyclyl is optionally substituted by 1, 2 or 3 substituent(s) selected from the group consisting of halo or C1-3 alkyl;
Ra1, Rb1, Ra2, Rb2 are the same or different, and are each independently hydrogen, hydroxyl or C1-3 alkyl.
In one embodiment of the present invention, Rd′ and R03 are linked together to form a 4- to 7-membered oxo-substituted heterocyclyl having a structure as represented by formula (h):
wherein Q is —(CRq1Rq2)s1, —N(Rq3)—(CRq1Rq2)s2, —O—(CRq1Rq2)s2, —(CRq1Rq2)—N(Rq3)—(CRq3Rq4), —(CRq1Rq2)—O—(CRq3Rq4), —N═CRq5—(CRq1Rq2)s3, —CRq5═CRq6—(CRq1Rq2)s3, —CRq5═N—(CRq1Rq2)s3; wherein s1 is 0, 1, 2 or 3; s2 is 1 or 2; s3 is 0 or 1; Rq1, Rq2, Rq3, Rq4, Rq5, Rq6 are each independently hydrogen or C1-3 alkyl.
In one embodiment of the present invention, Rd′ and R03 are linked together to form a 4- to 7-membered oxo-substituted heterocyclyl having a structure selected from the group consisting of:
In one embodiment of the present invention, —N(R03)-L- has a structure as represented by formula (c), formula (d), formula (e) or formula (f):
in the formula (c), formula (d), t1, t2, t3, t4, t5 are each independently 0 or 1;
R03 is hydrogen, or a substituted or unsubstituted C1-10 alkyl;
R11, R12, R21, R22, R31, R32, R41, R42 are selected from the combination selected from the group consisting of:
(1) R11, R12, R21, R22, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(2) R11, R12, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(3) R11, R12, R21, R22, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3alkyl;
(4) R11, R12, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(5) R12, R21, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
in the formula (e), formula (f), t3, t4 are each independently 0 or 1;
R11, R12, R21, R22, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
X is NRx1, O or CRx2Rx3;
Y is N or CRy;
Rx1, Rx2, Rx3, Ry are each independently hydrogen or C1-3 alkyl;
n1, n2 are each independently 1, 2 or 3.
In one embodiment of the present invention, the formula (c) has a structure selected from the the group consisting of:
In one embodiment of the present invention, the formula (d) has a structure selected from the group consisting of:
In one embodiment of the present invention, the formula (e) has a structure selected from the group consisting of:
In one embodiment of the present invention, the formula (f) has a structure selected from the group consisting of:
In one embodiment of the present invention, A has a structure as represented by formula (a); —N(R03)-L- has a structure as represented by formula (c) or formula (d). In one embodiment of the present invention, A has a structure as represented by formula (a); —N(R03)-L- has a structure as represented by formula (e) or formula (f). In one embodiment of the present invention, A has a structure as represented by formula (b); —N(R03)-L- has a structure as represented by formula (c) or formula (d). In one embodiment of the present invention, A has a structure as represented by formula (b); —N(R03)-L- has a structure as represented by formula (e) or formula (f).
In one embodiment of the present invention, the formula (a) has a structure selected from the group consisting of:
wherein the A1, A2 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S;
the A3, A4 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: imidazole, pyrrole, 2,3-dihydrothiazole, 2,3-dihydrooxazole, 2,3-dihydro-1H-imidazole, 2,5-dihydro-1H-imidazole, 1,2,4-triazole; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, in the formula (a-1), Ra is hydrogen; Rb, Rd′ are each independently hydrogen, halo, C1-3 alkyl, C1-3 alkoxy or NRa0Rb0.
In one embodiment of the present invention, in the formula (a-1), Ra is hydrogen; Rb, Rd′ are each independently hydrogen, fluoro, chloro, methyl, ethyl, n-propyl, iso-propyl, methoxy, ethoxy, n-propoxy, iso-propoxy, NH2, NHCH3 or N(CH3)2.
In one embodiment of the present invention, the formula (b) has a structure selected from the group consisting of:
wherein the A1, A2 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S;
the A3, A4 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: imidazole, pyrrole, 2,3-dihydrothiazole, 2,3-dihydrooxazole, 2,3-dihydro-1H-imidazole, 2,5-dihydro-1H-imidazole, 1,2,4-triazole; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, A has a structure selected from those as represented by formula (a-1), formula (a-2), formula (a-3), formula (a-4), formula (a-5), formula (a-6), formula (b-1), formula (b-2), formula (b-3), formula (b-4) or formula (b-5); —N(R03)-L- has a structure selected from those as represented by formula (c), formula (d), formula (e), formula (f).
In one embodiment of the present invention, —N(R03)-L- is selected from the group consisting of:
In one embodiment of the present invention, -A-C(O)—N(R03)— has a structure as represented by formula (g):
Q is —(CRq1Rq2)s1, —N(Rq3)—(CRq1Rq2)s2, —O—(CRq1Rq2)s2, —(CRq1Rq2)—N(Rq3)—(CRq3Rq4), —(CRq1Rq2)—O—(CRq3Rq4), —N═CRq5—(CRq1Rq2)s3, —CRq5═CRq6—(CRq1Rq2)s3, —CRq5═N—(CRq1Rq2)s3; wherein s1 is 0, 1, 2 or 3; s2 is 1 or 2; s3 is 0 or 1;
Rq1, Rq2, Rq3, Rq4, Rq5, Rq6 are each independently hydrogen or C1-3 alkyl;
Ra, Z1, Z2, “” are defined as in the specification;
L is —(CR11R12)t1—(CR21R22)t2—(CR31R32)t3—(CR41R42)t4—(O)t5 or —(CR11R12)t1—(CR21R22)t2—(NR31)t3—(CR41R42)t4—(O)t5; wherein t1, t2, t3, t4, t5 are each independently 0 or 1;
R11, R12, R21, R22, R31, R32, R41, R42 are selected from the combination selected from the group consisting of:
(1) R11, R12, R21, R22, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(2) R11, R12, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(3) R11, R12, R21, R22, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(4) R11, R12, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(5) R12, R21, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxyl, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
In one embodiment of the present invention, in the formula (g), Z1 is CH; Z2 is N; “” is a double bond; Q is (CH2)2.
In one embodiment of the present invention, B has a structure as represented by formula (II-a); —N(R03)-L- has a structure as represented by formula (c) or formula (d).
In one embodiment of the present invention, B has a structure as represented by formula (II-a); —N(R03)-L- has a structure as represented by formula (e) or formula (f).
In one embodiment of the present invention, B has a structure as represented by formula (II-b); —N(R03)-L- has a structure as represented by formula (c) or formula (d).
In one embodiment of the present invention, B has a structure as represented by formula (II-b); —N(R03)-L- has a structure as represented by formula (e) or formula (f).
In one embodiment of the present invention, the formula (II-a) has a structure selected from the group consisting of:
wherein the A1, A2 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S;
the A3, A4 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: imidazole, pyrrole, 2,3-dihydrothiazole, 2,3-dihydrooxazole, 2,3-dihydro-1H-imidazole, 2,5-dihydro-1H-imidazole, 1,2,4-triazole; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, in the formula (a-2), Ra is hydrogen; Rc, Rd′ are each independently hydrogen or C1-3 alkyl.
In one embodiment of the present invention, in the formula (a-2), Ra is hydrogen; Rc, Rd′ are each independently hydrogen or methyl.
In one embodiment of the present invention, the formula (II-b) has a structure selected from the group consisting of:
wherein the A1, A2 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S;
the A3, A4 rings are each independently 5- or 6-membered monoheteroaryl selected from the group consisting of: imidazole, pyrrole, 2,3-dihydrothiazole, 2,3-dihydrooxazole, 2,3-dihydro-1H-imidazole, 2,5-dihydro-1H-imidazole, 1,2,4-triazole; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, in the formula (b-1), Ra is hydrogen; Rc, Rd are each independently hydrogen or C1-3 alkyl.
In one embodiment of the present invention, in the formula (b-1), Ra is hydrogen; Rc, Rd are each independently hydrogen or methyl.
In one embodiment of the present invention, B has a structure as represented by formula (a-2), formula (a-3), formula (a-4), formula (a-5), formula (a-6), formula (b-1), formula (b-2), formula (b-3), formula (b-4), formula (b-5); —N(R03)-L- has a structure as represented by formula (c), formula (d), formula (e), formula (f).
In one embodiment of the present invention, —B—C(O)—N(R03)— has a structure as represented by formula (II-g):
Q is —(CRq1Rq2)s1, —N(Rq3)—(CRq1Rq2)s2, —O—(CRq1Rq2)s2, —(CRq1Rq2)—N(Rq3)—(CRq3Rq4), —(CRq1Rq2)—O—(CRq3Rq4), —N═CRq5—(CRq1Rq2)s3, —CRq5═CRq5—(CRq1Rq2)s3, —CRq5═N—(CRq1Rq2)s3; wherein s1 is 0, 1, 2 or 3; s2 is 1 or 2; s3 is 0 or 1;
Rq1, Rq2, Rq3, Rq4, Rq5, Rq6 are each independently hydrogen or C1-3alkyl;
Ra, W1, W2, “” are defined as in the specification;
L is —(CR11R12)t1—(CR21R22)t2—(CR31R32)t3—(CR41R42)t4—(O)t5 or —(CR11R12)t1—(CR21R22)t2—(NR31)t3—(CR41R42)t4—(O)t5; wherein t1, t2, t3, t4, t5 are each independently 0 or 1;
R11, R12, R21, R22, R31, R32, R41, R42 are selected from the combination selected from the group consisting of:
(1) R11, R12, R21, R22, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(2) R11, R12, R31, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3alkyl;
(3) R11, R12, R21, R22, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(4) R11, R12, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
(5) R12, R21, R22, R32, R41, R42 are each independently hydrogen, halo, hydroxy, hydroxymethyl, hydroxyethyl or C1-3 alkyl;
In one embodiment of the present invention. L is selected from the group consisting of:
In one embodiment of the present invention, the A1 ring has a structure selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to phenyl; the above structure is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the A2 ring has a structure selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to phenyl; the above structure is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the A3 ring has a structure selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to another ring; the above structure is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the A4 ring has a structure selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to another ring; the above structure is unsubstituted or substituted by 1, 2 or 3 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the substituent of the group S is selected from the group consisting of: hydroxy, halo, nitro, oxo, C1-6 alkyl, hydroxy-substituted C1-6 alkyl, benzyl, —S—C1-6 alkyl, —S-halo C1-6 alkyl, —(CH2)u-cyano, —(CH2)u—C1-6 alkoxy, —(CH2)u-halo C1-6 alkoxy, —(CH2)u-halo C1-6alkyl, —(CH2)u—C3-6 monocyclic heterocyclyl, —(CH2)u—C3-8 monocyclic cycloalkyl, —(CH2)u-phenyl, —(CH2)u-5- or 6-membered monoheteroaryl, —(CH2)u—O—(CH2)v-halo C1-6alkyl, —(CH2)u—O—(CH2)v—C3-8 monocyclic cycloalkyl, —(CH2)u—O—(CH2)v—C3-6 monocyclic heterocyclyl, —(CH2)u—O—(CH2)v-phenyl, —(CH2)u—O—(CH2)v-5- or 6-membered monoheteroaryl, —(CH2)u—S—(CH2)v-phenyl, —(CH2)u—SO2—(CH2)v-phenyl, —(CH2)u—O—C(O)NRa0Rb0, —(CH2)u—O—(CH2)v—C1-6 alkoxy, —(CH2)u—O—(CH2)vOH, —(CH2)u—SO2C1-6 alkyl, —(CH2)u—SO2NRa0Rb0, —(CH2)u—C(O)NRa0Rb0, —(CH2)u—NRa0Rb0, —(CH2)n—C(O)C1-6 alkyl, —C(O)OC1-6alkyl, NRa0C(O)—(CH2)u—NRa0Rb0, NRa0C(O)—(CH2)u0H, NRa0C(O)-halo C1-6 alkyl; wherein the C3-8monocyclic cycloalkyl, C3-6 monocyclic heterocyclyl, phenyl, 5- or 6-membered monoheteroaryl are optionally substituted by 1, 2 or 3 substitute(s) selected from the group consisting of hydroxy, hydroxymethyl, hydroxyethyl, halo, cyano, cyanomethyl, cyanoethyl, C1-3 alkyl, C1-3 alkoxy and C3-6 monocyclic cycloalkyl; u, v are each independently 0, 1, 2, 3 or 4; Ra0, Rb0 are each independently hydrogen or C1-3alkyl; or Ra0, Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl, the C3-8 monocyclic heterocyclyl is optionally substituted by 1, 2 or 3 substitute(s) selected from the group consisting of halo or C1-3 alkyl.
In one embodiment of the present invention, among the substitutes of the group S, the C3-6 monocyclic heterocyclyl is selected from the group consisting of: aziridine, oxirane, azetidine, azetidin-2-one, oxetane, oxetan-2-one, oxazolidine, pyrrolidin-2-one, pyrrolidin-2,5-dione, 1,3-dioxolane, dihydrofuran-2(3H)-one, dihydrofuran-2,5-dione, piperidin-2-one, piperidin-2,6-dione, tetrahyro-2H-pyran-2-one, imidazolidine, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, 1,3-dioxolan-2-one, oxazolidin-2-one, imidazolidine-2-one, piperidine, piperazine, piperazin-2-one, morpholine, morpholin-3-one, morpholin-2-one, thiomorpholin-3-one 1,1-dioxide, thiomorpholine, thiomorpholine-1,1-dioxide, tetrahydropyran, 1,2-dihydroazacyclobutadiene, 1,2-dihydrooxetadiene, 2,5-dihydro-1H-pyrrole, 2,5-dihydrofuran, 2,3-dihydrofuran, 2,3-dihydro-1H-pyrrole, 3,4-dihydro-2H-pyran, 1,2,3,4-tetrahydropyridine, 3,6-dihydron-2H-pyran, 1,2,3,6-tetrahydropyridine, 1,3-oxazinane, hexahydropyrimidine, 1,4-dioxane, tetrahydropyrimidin-2(1H)-one, 1,4-dioxan-2-one, 5,6-dihydro-2H-pyran-2-one.
In one embodiment of the present invention, among the substitutes of the group S, the C3-8 monocyclic cycloalkyl is selected from the group consisting of: cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexdienyl, cyclobutanone, cyclobutan-1,2-dione, cyclopentanone, cyclopentan-1,3-dione, cyclohexanone, cyclohexan-1,3-dione.
In one embodiment of the present invention, among the substitutes of the group S, the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine.
In one embodiment of the present invention, the C6-14 aryl in R0 is is phenyl, naphthyl, or a 9- or 10-membered aromatic fused bicyclic ring formed by fusing a phenyl to one non-aromatic ring, the non-aromatic ring is 3- to 6-membered saturated or partially unsaturated monocyclic heterocyclyl, or 3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl, wherein the 3- to 6-membered saturated or partially unsaturated monocyclic heterocyclyl is selected from the group consisting of: aziridine, oxirane, azetidine, azetidin-2-one, oxetane, oxetan-2-one, oxazolidine, pyrrolidin-2-one, pyrrolidin-2,5-dione, 1,3-dioxolane, dihydrofuran-2(3H)-one, dihydrofuran-2,5-dione, piperidin-2-one, piperidin-2,6-dione, tetrahyro-2H-pyran-2-one, imidazolidine, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, 1,3-dioxolan-2-one, oxazolidin-2-one, imidazolidine-2-one, piperidine, piperazine, piperazin-2-one, morpholine, morpholin-3-one, morpholin-2-one, thiomorpholin-3-one 1,1-dioxide, thiomorpholine, thiomorpholine-1,1-dioxide, tetrahydropyran, 1,2-dihydroazacyclobutadiene, 1,2-dihydrooxetadiene, 2,5-dihydro-1H-pyrrole, 2,5-dihydrofuran, 2,3-dihydrofuran, 2,3-dihydro-1H-pyrrole, 3,4-dihydro-2H-pyran, 1,2,3,4-tetrahydropyridine, 3,6-dihydro-2H-pyran, 1,2,3,6-tetrahydropyridine, 1,3-oxazinane, hexahydropyrimidine, 1,4-dioxane, tetrahydropyrimidin-2(1H)-one, 1,4-dioxan-2-one, 5,6-dihydro-2H-pyran-2-one; the 3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl is selected from the group consisting of: cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexdienyl, cyclobutanone, cyclobutan-1,2-dione, cyclopentanone, cyclopentan-1,3-dione, cyclohexanone, cyclohexan-1,3-dione; the 9- or 10-membered aromatic fused bicyclic ring is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the C6-14 aryl in R0 is phenyl.
In one embodiment of the present invention, the C5-14 heteroaryl in R0 is a 5- or 6-membered monoheteroaryl, wherein the 5- or 6-membered mono-heteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 5- or 6-membered monoheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S
In one embodiment of the present invention, the C5-14 heteroaryl in R0 is a 9- or 10-membered biheteroaryl formed by fusing a phenyl to a 5- or 6-membered monoheteroaryl, wherein the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 9- or 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the 9- or 10-membered biheteroaryl has a structure as represented by formula (A) or formula (B):
wherein, the C ring is a 5- or 6-membered monoheteroaryl; wherein the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 9- or 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the C ring has a structure selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to phenyl.
In one embodiment of the present invention, the 9- or 10-membered biheteroaryl formed by fusing a phenyl to a 5- or 6-membered monoheteroaryl are selected from the group consisting of: benzoxazole, benzisoxazole, benzimidazole, benzothiazole, benzisothiazole, benzotriazole, benzofuran, benzothiophene, indole, indazole, isoindole, quinoline, isoquinoline, quinazoline, quinoxaline, cinnoline.
In one embodiment of the present invention, the C5-14 heteroaryl in R0 is a 8- to 10-membered biheteroaryl formed by fusing a 5- or 6-membered monoheteroaryl to a 5- or 6-membered monoheteroaryl, wherein the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 8- to 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the 8- to 10-membered biheteroaryl has a structure as represented by formula (C) or formula (D):
wherein, the D ring, E ring are each independently a 5- or 6-membered monoheteroaryl; wherein the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 8- to 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the D ring, E ring have a structure each independently selected from the group consisting of:
wherein “” represents a pair of adjacent carbon atoms shared as fused to another ring.
In one embodiment of the present invention, the 8- to 10-membered biheteroaryl formed by fusing a 5- or 6-membered monoheteroaryl to a 5- or 6-membered monoheteroaryl is selected from the group consisting of pyridopyrimidine and naphthyridine.
In one embodiment of the present invention, the 8- to 10-membered biheteroaryl formed by fusing a 5- or 6-membered monoheteroaryl to a 5- or 6-membered monoheteroaryl is selected from the group consisting of: pyrido[3,2-d]pyrimidine, pyrido[2,3-d]pyrimidine, pyrido[3,4-d]pyrimidine, pyrido[4,3-d]pyrimidine, 1,8-naphthyridine, 1,7-naphthyridine, 1,6-naphthyridine, 1,5-naphthyridine.
In one embodiment of the present invention, the 9- or 10-membered biheteroaryl has a structure selected from the group consisting of:
the above 9- or 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the 8- to 10-membered biheteroaryl has a structure selected from the group consisting of:
the above 8- to 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, the C5-14 heteroaryl in R0 is a 8- to 10-membered biheteroaryl formed by fusing a 5- or 6-membered monoheteroaryl to a non-aromatic ring, the non-aromatic ring is a 3- to 6-membered saturated or partially unsaturated monocyclic heterocyclyl, or 3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl, wherein the 5- or 6-membered monoheteroaryl is selected from the group consisting of: thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine or pyrazine; the 3- to 6-membered saturated or partially unsaturated monocyclic heterocyclyl is selected from the group consisting of: aziridine, oxirane, azetidine, azetidin-2-one, oxetane, oxetan-2-one, oxazolidine, pyrrolidin-2-one, pyrrolidin-2,5-dione, 1,3-dioxolane, dihydrofuran-2(3H)-one, dihydrofuran-2,5-dione, piperidin-2-one, piperidin-2,6-dione, tetrahyro-2H-pyran-2-one, imidazolidine, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, 1,3-dioxolan-2-one, oxazolidin-2-one, imidazolidine-2-one, piperidine, piperazine, piperazin-2-one, morpholine, morpholin-3-one, morpholin-2-one, thiomorpholin-3-one 1,1-dioxide, thiomorpholine, thiomorpholine-1,1-dioxide, tetrahydropyran, 1,2-dihydroazacyclobutadiene, 1,2-dihydrooxetadiene, 2,5-dihydro-1H-pyrrole, 2,5-dihydrofuran, 2,3-dihydrofuran, 2,3-dihydro-1H-pyrrole, 3,4-dihydro-2H-pyran, 1,2,3,4-tetrahydropyridine, 3,6-dihydron-2H-pyran, 1,2,3,6-tetrahydropyridine, 1,3-oxazinane, hexahydropyrimidine, 1,4-dioxane, tetrahydropyrimidin-2(1H)-one, 1,4-dioxan-2-one, 5,6-dihydro-2H-pyran-2-one; the 3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl is selected from the group consisting of: cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexdienyl, cyclobutanone, cyclobutan-1,2-dione, cyclopentanone, cyclopentan-1,3-dione, cyclohexanone, cyclohexan-1,3-dione; the 8- to 10-membered biheteroaryl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) selected from the group S.
In one embodiment of the present invention, R0 is a substituted or unsubstituted phenyl, or a substituted or unsubstituted pyridyl, the “substituted” means that 1, 2, 3 or 4 hydrogen atom(s) in the group are substituted by a substituent each independently selected from the group S.
In one embodiment of the present invention, R0 is selected from the group consisting of:
In one embodiment of the present invention, R03 and R21 are linked together to form a C3-8 monocyclic heterocyclyl selected from the group consisting of: aziridine, oxirane, azetidine, oxetane, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, piperidine, piperazine, morpholine, thiomorpholine, thiomorpholine-1,1-dioxide and tetrahydropyran; the C3-8 monocyclic heterocyclyl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, R03 and R31 are linked together to form a C3-8 monocyclic heterocyclyl selected from the group consisting of: aziridine, oxirane, azetidine, oxetane, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, piperidine, piperazine, morpholine, thiomorpholine, thiomorpholine-1,1-dioxide and tetrahydropyran; the C3-8 monocyclic heterocyclyl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the Ra0, Rb0 together with the nitrogen atom attached thereto form a C3-8 monocyclic heterocyclyl having a structure selected from the group consisting of:
the above C3-8 monocyclic heterocyclyl is unsubstituted or substituted by 1, 2, 3 or 4 substituent(s) each independently selected from the group S.
In one embodiment of the present invention, the R0, R1, R2, R3, R01, R02, R03, A, B, L and the like are each independently the corresponding group in respective specific compound in the Examples.
In one embodiment of the present invention, the compound of formula (I) or formula (II) is selected from the group consisting of respective specific compounds as noted in the Examples, especially, any compound of Z1 to Z53.
In one embodiment of the present invention, the compound of formula (I) or formula (II) is selected from the group consisting of respective specific compounds as noted in the Examples, especially, any compound of Z54 to Z65.
In one embodiment of the present invention, the compound of formula (I) or formula (II) is selected from the group consisting of the compounds as prepared in the Examples of the present application.
In one embodiment of the present invention, the compound is selected from the group consisting of:
In one embodiment of the present invention, the compound is selected from the group consisting of:
In another respect, the present invention provides a pharmaceutical composition, comprising the compound as described above or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof; and a pharmaceutically acceptable carrier.
As used herein, the term “pharmaceutically acceptable carrier” means any formulation or carrier medium capable of delivering an effective amount of the active substance of the invention without interfering with the biological activity of the active substance and without causing adverse effects to the host or subject. Representative carriers include water, oil, vegetables and minerals, cream base, lotion base, ointment base and the like. These bases include suspension agents, viscosifiers, transdermal promoters and the like. Their formulations are known to those skilled in the field of cosmetic or topical medicine.
In an embodiment of the present invention, the pharmaceutical composition may be administered in any form of oral, spray inhalation, rectal administration, nasal administration, buccal administration, topical administration, parenteral administration, such as, subcutaneous, intravenous, intramuscular, intraperitoneal, intrathecal, intraventricular, intrasternal and intracranial injection or infusion, or administered by means of an explanted reservoir. Among these, oral, intraperitoneal or intravenous administration is preferred. When administered orally, the compound of the present invention may be formulated into any orally acceptable dosage form, including but not limited to tablets, capsules, aqueous solutions or aqueous suspensions. Carriers used in tablets typically include lactose and cornstarch. Lubricants such as magnesium stearate may also be added. Diluents used in capsules typically include lactose and dried cornstarch. Aqueous suspensions are typically formulated by mixing an active ingredient with appropriate emulsifiers and suspension agents. Sweeteners, fragrances or colorants may be added to the oral dosage form as required. When topically administered, especially to the affected surface or organ readily accessible by topical application, such as eye, skin, or lower intestinal neuropathy, the compound of the present invention may be formulated into different topical dosage forms depending on the surface or organs. When topically administered to eyes, the compound of the present invention may be formulated into a dosage form of micronized suspension or solution using an isotonic sterile saline of a certain pH as the carrier, in which preservatives such as benzyl alkoxide chloride may or may not be added. For ocular administration, the compound may be formulated into a form of cream, such as, Vaseline cream. When administered topically to skin, the compound of the present invention may be formulated into a suitable dosage form of ointment, lotion or cream, in which an active ingredient is suspended or dissolved in one or more carriers. The carriers useful in an ointment formulation include but not limited to: mineral oils, liquid vaseline, white vaseline, propylene glycol, polyoxyethylene, polypropylene oxide, emulsified wax and water. The carriers useful in a lotion or cream include but not limited to: mineral oils, sorbitan monostearate, Tween 60, Cetyl ester wax, hexadecenyl aryl alcohol, 2-octyldodecanol, benzyl alcohol and water. The compound of the present invention may be administered in a dosage form of sterile injections, including sterial aqueous injection or oil suspension or sterile injection solution. Useful carriers and solvents include water, Ringer's solution and isotonic sodium chloride solution. Further, sterilized non-volatile oils can also be used as solvents or suspension media, such as monotriglycerides or diglycerides
In another respect, the present invention provides use of the above heterocyclic amide compound or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof in the preparation of a medicament for preventing and/or treating a disease.
In another respect, the present invention provides a method for treating and/or preventing a RIPK1-related disease or disorder, comprising the step of administering to a patient in need thereof a therapeutically effective amount of compound, or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof, or any combination thereof, or the above pharmaceutical composition.
As used herein, the term “subject” refers to an aminal, especially a mammal, preferally a human being.
As used herein, the term “effective amount” or “therapeutically effective amount” refers to the sufficient amount of a drug or agent that is non-toxic but has the desired effect. In an embodiment of the present invention, when treating a patient in accordance with the present invention, the amount of a given drug depends on a number of factors, such as the particular dosage regimen, the type of disease or disorder and its severity, and the uniqueness of the subject or the host in need of treatment (e.g., body weight), however, depending on the particular circumstances, including, for example, the particular drug that has been employed, the route of administration, the condition being treated, and the subject or host being treated, the dosage administered can be decided by methods routinely known in the art. Generally, for use in the treatment for an adult, the dosage administered will typically range from 0.02 to 5000 mg/day, for example from about 1 to 1500 mg/day. The desired dose may conveniently be presented as a single dose, or concurrently (or in a short period of time) or in divided doses at appropriate intervals, such as two, three, four or more divided doses per day. It will be understood by those skilled in the art that although the above dosage ranges are given, the specific effective amount can be appropriately adjusted depending on the condition of the patient and in connection with the diagnosis of the physician.
In an embodiment of the present invention, the disease is inflammatory bowel disease, ulcerative colitis, Crohn's disease, psoriasis, rheumatoid arthritis, NASH and heart failure.
In another respect, the present invention provides use of the above heterocyclic amide compound or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof in the preparation of a selective RIPK1 inhibitor, the selective RIPK1 inhibitor is useful in treating a RIPK1-related disease or disorder
In one embodiment of the present invention, the RIPK1-related disease or disorder includes, but are not limited to: inflammatory disease such as Crohn's disease and ulcerative colitis, inflammatory bowel disease, asthma, graft versus host disease, chronic obstructive pulmonary disease; autoimmune diseases such as Graves disease, rheumatoid arthritis, systemic lupus erythematosus, psoriasis; destructive bone diseases such as bone resorption diseases, osteoarthritis, osteoporosis, multiple myeloma-related bone diseases; hyperplastic diseases such as acute myeloid leukemia, chronic myelogenous leukemia; angiogenesis disorders such as angiogenesis disorders, include solid tumors, ocular neovascularization and infantile hemangiomas; infectious diseases such as sepsis, septic shock and shigellosis; neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, cerebral ischemia or neurodegenerative diseases caused by or traumatic injury, tumors and viral diseases such as metastatic melanoma, Kaposi's sarcoma, multiple myeloma, HIV infection and CMV retinitis, AIDS.
In one embodiment of the present invention, the RIPK1-related disease or disorder includes, but is not limited to, pancreatitis (acute or chronic), asthma, allergies, adult respiratory distress syndrome, chronic obstructive pulmonary disease, glomerulonephritis, rheumatoid arthritis, systemic lupus erythematosus, scleroderma, Hashimoto's thyroiditis, Graves's disease, autoimmune gastritis, diabetes, autoimmune hemolytic anemia, autoimmune neutropenia, thrombocytopenia, atopic dermatitis, chronic active hepatitis, myasthenia gravis, amyotrophic lateral sclerosis, multiple sclerosis, inflammatory bowel disease, ulcerative colitis, Crohn's disease, psoriasis, graft versus host disease, inflammatory responses induced by endotoxins, tuberculosis, atherosclerosis, muscular degeneration, cachexia, psoriatic arthritis, Reiter's syndrome, gout, traumatic arthritis, rubella arthritis, acute synovitis, pancreatic beta cell disease; diseases characterized by extensive neutrophil infiltration; rheumatoid spondylitis, gouty arthritis and other arthritis conditions, cerebral malaria, chronic pulmonary inflammation, silicosis, pulmonary sarcomatosis, bone resorption diseases, allograft rejection, fever and myalgia induced by infections, cachexia secondary to infections, luteoid formation, scar tissue formation, ulcerative colitis, fever, influenza, osteoporosis, osteoarthritis, acute myeloid leukemia, chronic myelogenous leukemia, metastatic melanoma, Kaposi's sarcoma, multiple myeloma, sepsis, septic shock and Shigellosis; Alzheimer's disease, Parkinson's disease, cerebral ischemia or neurodegenerative diseases caused by traumatic injury; angiogenesis disorders, including solid tumors, ocular neovascularization, and infantile hemangiomas; viral diseases, including acute hepatitis infections (including Hepatitis A, B and C), HIV infection and CMV retinitis, AIDS, ARC or malignant tumor and herpes; stroke, myocardial ischemia, stroke heart attack, ischemia of organs, vascular proliferation, heart and kidney reperfusion injury, thrombosis, cardiac hypertrophy, the platelet aggregation induced by thrombin, endotoxemia and/or toxic shock syndrome, prostaglandin-endoperoxide synthase-2-related disorders and pemphigus vulgaris.
In one embodiment of the present invention, the RIPK1-related disease or disorder is selected from the group consisting of inflammatory bowel disease, Crohn's disease and ulcerative colitis, allograft rejection, rheumatoid arthritis, psoriasis, ankylosing spondylitis, psoriatic arthritis and pemphigus vulgaris. Alternatively, preferred diseases are selected from ischemia reperfusion injuries, including cerebral ischemia reperfusion injury induced by stroke and myocardial ischemia reperfusion injury induced by myocardial infarction.
As used therein, the term “pharmaceutically acceptable salts” refers to salts of the the compound of the compound which are pharmaceutically acceptable, and have the pharmacological activity of the parent compound. The type of pharmaceutical acceptable salts includes: acid addition salts formed with inorganic acids (such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like) or organic acids (such as acetic acid, propionic acid, hexanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, trifluoroacetic acid, formic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, naphthalene sulfonic acid, camphor sulfonic acid, gluconic acid, glutamic acid, hydroxynaphthalamic acid, salicylic acid, stearic acid, muconic acid and the like); or salts formed when an acidic proton present in the parent compound either is replaced by a metal ion such as an alkali metal ion or alkaline earth ion, or coordinates with an organic base such as ethanolamine, diethanolamine, triethanolamine, N-methylglucamine, and the like. The pharmaceutically acceptable salts of the present invention can be synthesized from the parent compound containing acid radicals or base radicals by conventional chemical methods. In general, such salts are prepared by the reaction of these compounds in a form of free acid or base with a stoichiometric amount of the appropriate base or acid in water or an organic solvent or a mixture of the both. In general, non-aqueous media such as ether, ethyl acetate, ethanol, isopropanol or acetonitrile are preferred. In addition to salt forms, the compounds provided herein also exist in prodrug forms. The prodrugs of the compounds described herein are readily chemically altered under physiological conditions to be converted into the compounds of the invention. In addition, prodrugs can be converted to the compounds of the present invention by chemical or biochemical methods in an in vivo environment.
As used herein, the term “solvate” refers to a substance formed by combining the compound of the invention with a pharmaceutically acceptable solvent. Pharmaceutical acceptable solvates include water, ethanol, acetic acid and the like. The solvates include stoichiometric solvates and non-stoichiometric solvates, preferably hydrates. Certain compounds of the present invention may be present in unsolvated or solvated forms, including hydrated forms. In general, solvated forms are equivalent to unsolvated forms and both are included within the scope of the present invention.
As used herein, the term “stereoisomers” include both conformational and configurational isomers, of which configurational isomers mainly include cis-trans isomers and optical isomers. The compound of the present invention may be present in a stereoisomeric form, and thereby cover all possible stereoisomeric forms, and any combination thereof or any mixture thereof, such as, a single enantiomer, a single non-enantiomer, or a mixture thereof. Where the compound of the invention contains an olefinic double bond, it includes a cis-isomer and trans-isomer, and any combination thereof, unless otherwise specified.
As used herein, the term “alkyl” refers to a liner or branched aliphatic hydrocarbon group having 1 to 20 carbon atoms. The term “C1-10 alkyl” refers to a liner or branched alkyl group having 1 to 10 carbon atoms, more preferably 1, 2, 3, 4, 5 or 6 carbon atoms, i.e., C1-6 alkyl, more preferably, C1-4 alkyl, the most preferably, C1-3 alkyl. Specific examples include, but are not limited to, methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert-butyl, sec-butyl, n-pentyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl, 2-methylbutyl, 3-methylbutyl, n-hexyl, 1-ethyl-2-methylpropyl, 1,1,2-trimethylpropyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 2,2-dimethylbutyl, 1,3-dimethylbutyl, 2-ethylbutyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2,3-dimethylbutyl and various branched isomers thereof.
As used herein, the term “alkoxy” refers to a group having a structure of —O-alkyl, wherein the alkyl is defined as above. The term “C1-10 alkoxy” refers to an alkoxy group having 1 to 10 carbon atoms, preferably, C1-6 alkoxy, more preferably, C1-4 alkoxy, the most preferably, C1-3 alkoxy. Specific examples include, but are not limited to, methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, tert-butoxy, sec-butoxy, n-pentoxy and the like.
As used herein, the term “alkenyl” refers to an alkyl as defined above having one or more carbon-carbon double bond at any position of the chain. The term “C2-8 alkenyl” refers to an alkenyl group having 2 to 8 carbon atoms and at least one carbon-carbon double bond, preferably, an alkenyl group having 2 to 6 carbon atoms and 1 to 2 carbon-carbon double bond, i.e., C2-6 alkenyl, more preferably, an alkenyl group having 2 to 4 carbon atoms and 1 to 2 carbon-carbon double bond, i.e., C2-4 alkenyl. Specific examples include, but are not limited to, vinyl, 1-propenyl, 2-propenyl, 1-, 2- or 3-butenyl, pentenyl, hexenyl, butadienyl, and the like.
As used herein, the term “alkynyl” refers to an alkyl as defined above having one or more carbon-carbon triple bond at any position of the chain. The term “C2-8 alkynyl” refers to an alkynyl group having 2 to 8 carbon atoms and at least one carbon-carbon triple bond, preferably, an alkynyl group having 2 to 6 carbon atoms and 1 to 2 carbon-carbon triple bond, i.e., C2-6 alkynyl, more preferably, an alkynyl group having 2 to 4 carbon atoms and 1 to 2 carbon-carbon triple bond, i.e., C2-4 alkynyl. Specific examples include, but are not limited to, ethynyl, 1-propynyl, 2-propynyl, 1-, 2- or 3-butynyl, and the like.
As used herein, the term “halogen” refers to fluoro, chloro, bromo and iodine.
As used herein, the term “haloalkyl” refers to an alkyl as defined above which is substituted by one or more (1, 2, 3, 4 or 5) halogens. The term “halo C1-10 alkyl” refers to a haloalkyl having 1 to 10 carbon atoms, preferably, halo C1-6 alkyl, more preferably, halo C1-4 alkyl, most preferably, halo C1-3 alkyl. Specific examples include, but are not limited to, chloromethyl, dichloromethyl, trichloromethyl, chloroethyl, 1,2-dichloroethyl, trichloroethyl, bromoethyl, fluoromethyl, difluoromethyl, trifluoromethyl, fluoroethyl, difluoroethyl, trifluoroethyl, and the like.
As used herein, the term “haloalkoxy” refers to an alkoxy as defined above which is substituted by one or more (1, 2, 3, 4 or 5) halogens. The term “halo C1-10 alkoxy” refers to a haloalkoxy having 1 to 10 carbon atoms, preferably, halo C1-6 alkoxy, more preferably, halo C1-4 alkoxy, most preferably, halo C1-3 alkoxy. Specific examples include, but are not limited to, trifluoromethoxy, trifluoroethoxy, fluoromethoxy, fluoroethoxy, difluoromethoxy, difluoroethoxy, and the like.
As used herein, the term “cycloalkyl” and “cycloalkyl ring” are used exchangeably to refer to a saturated monocyclic or polycyclic fused cyclic hydrocarbyl. The term “C3-20 cycloalkyl” refers to a cycloalkyl having 3 to 20 carbon atoms, including monocyclic cycloalkyl, spirocycloalkyl, fused cycloalkyl and bridged cycloalkyl, preferably, C3-12 cycloalkyl. In the present invention, a cyclic carbon atom in a cycloalkyl may be optionally replaced by 1, 2 or 3 oxo group(s) to form a cyclic ketone structure. The term “C3-8 monocyclic cycloalkyl” and “C3-8 cycloalkyl” refer to a saturated monocyclic cycloalkyl having 3 to 8 carbon atoms, preferably, C3-6 monocyclic cycloalkyl (i.e., C3-6 cycloalkyl), more preferably, C3, C4, C5 or C6 monocyclic cycloalkyl. Specific examples of monocyclic cycloalkyl include, but are not limited to, cyclopropy, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and the like. As used herein, the term “spirocycloalkyl” and “spirocycloalkyl ring” refer to a polycyclic cycloalkyl formed by sharing a carbon atom (referred to as spiro atom) between two or more single rings. Depending on the number of the spiro atoms shared between the rings, the spirocycloalkyls are divided into monospirocycloalkyl, bispirocycloalkyl and polyspirocycloalkyl. As used herein, the term “fused cycloalkyl” and “fused cycloalkyl ring” refer to a polycyclic cycloalkyl formed by sharing a pair of adjacent carbon atoms between two or more single rings, and may be divided into bicyclic, tricyclic, tetracyclic or polycyclic fused cycloalkyl depending on the number of the formed ring(s). The cycloalkyl ring may be fused to an aryl ring, a heteroaryl ring or a heterocyclyl ring, wherein the ring attached to the parent structure is the cycloalkyl ring. Non-limiting examples include indanyl, tetralyl, benzocycloheptyl, and the like. In the present invention, each of the above types of cycloalkyl may be optionally substituted, where the substituent(s) are preferably one or more substituents as described in the present disclosure.
As used herein, the term “halocycloalkyl” refers to a cycloalkyl as defined above which is substituted by one or more (1, 2, 3, 4 or 5) halogens. The term “halo C3-8 cycloalkyl” refers to a halocycloalkyl having 3 to 8 carbon atoms, preferably, halo C3-6 cycloalkyl, more preferably, halo C3, halo C4, halo C5, or halo C6 cycloalkyl. Specific examples include, but are not limited to, trifluorocyclopropyl, fluorocyclopropyl, fluorocyclohexyl, difluorocyclopropyl, difluorocyclohexyl, and the like.
As used herein, the term “heterocyclyl” and “heterocyclyl ring” are used exchangeably to refer to a saturated or partially unsaturated monocyclic or polycyclic fused cyclic hydrocarbyl. The term “C3-8 monocyclic heterocyclyl”, “3- to 8-membered monocyclic heterocyclyl” and “3- to 8-membered monocyclic heterocyclyl ring” refer to a saturated or partially unsaturated monocyclic hydrocarbyl having 3 to 8 ring atoms wherein 1, 2 or 3 ring atoms are heteroatoms selected from the group consisting of nitrogen, oxygen or S(O)m (wherein m is an integer from 0 to 2). The heterocyclyl ring does not contain a cyclic moiety of —O—O—, —O—S— or —S—S—, and the remaining ring atoms are each carbon. Preferred is a 3- to 6-membered monocyclic heterocyclyl having 3 to 6 ring atoms, wherein 1 or 2 ring atoms are heteroatoms (i.e., C3-6 monocyclic heterocyclyl or 3- to 6-membered saturated or partially unsaturated monocyclic heterocyclyl). More preferred is a 5- or 6-membered monocyclic heterocyclyl having 5 or 6 ring atoms, wherein 1 or 2 ring atoms are heteroatoms. If the heteroatom is a nitrogen atom, the nitrogen atom may be substituted or unsubstituted (i.e., N or NR, R is hydrogen or another substituent as defined herein). If the heteroatom is a sulfur atom, the sulfur atom may be optionally oxidized (i.e., S(O)m, m is an integer from 0 to 2). The carbon atom in the ring of the monocyclic heterocyclyl may be optionally replaced by 1, 2 or 3 oxo group(s) to form a cyclic ketone, cyclic lactone or cyclic lactam. Specific examples of the monocyclic heterocyclyl includes, but are not limited to, aziridine, oxirane, azetidine, azetidin-2-one, oxetane, oxetan-2-one, oxazolidine, pyrrolidin-2-one, pyrrolidin-2,5-dione, 1,3-dioxolane, dihydrofuran-2(3H)-one, dihydrofuran-2,5-dione, piperidin-2-one, piperidin-2,6-dione, tetrahyro-2H-pyran-2-one, imidazolidine, tetrahydrofuran, tetrahydrothiophene, tetrahydropyrrole, 1,3-dioxolan-2-one, oxazolidin-2-one, imidazolidine-2-one, piperidine, piperazine, piperazin-2-one, morpholine, morpholin-3-one, morpholin-2-one, thiomorpholin-3-one 1,1-dioxide, thiomorpholine, thiomorpholine-1,1-dioxide, tetrahydropyran, 1,2-dihydroazacyclobutadiene, 1,2-dihydrooxetadiene, 2,5-dihydro-1H-pyrrole, 2,5-dihydrofuran, 2,3-dihydrofuran, 2,3-dihydro-1H-pyrrole, 3,4-dihydro-2H-pyran, 1,2,3,4-tetrahydropyridine, 3,6-dihydron-2H-pyran, 1,2,3,6-tetrahydropyridine, 1,3-oxazinane, hexahydropyrimidine, 1,4-dioxane, tetrahydropyrimidin-2(1H)-one, 1,4-dioxan-2-one, 5,6-dihydro-2H-pyran-2-one, 5,6-dihydropyrimid-4(3H)-one, 3,4-dihydropyrid-2(1H)-one, 5,6-dihydropyrid-2(1H)-one, 5,6-dihydropyrimid-4(1H)-one, pyrimid-4(3H)-one, pyrimid-4(1H)-one, 4,5-dihydro-1H-imidazole, 2,3-dihydro-1H-imidazole, 2,3-dihydrooxazole, 1,3-dioxole, 2,3-dihydrothiophene, 2,5-dihydrothiophene, 3,4-dihydro-2H-1,4-oxazine, 3,4-dihydro-2H-1,4-thiazine 1,1-dioxide, 1,2,3,4-tetrahydropyrazine, 1,3-dihydro-2H-pyrrol-2-one, 1,5-dihydro-2H-pyrrol-2-one, 1H-pyrrol-2,5-dione, furan-2(3H)-one, furan-2(5H)-one, 1,3-dioxol-2-one, oxazole-2(3H)-one, 1,3-dihydro-2H-imidazole-2-one, furan-2,5-dione, 3,6-dihydropyrid-2(1H)-one, pyrid-2,6-(1H,3H)-dione, 5,6-dihydro-2H-pyran-2-one, 3,6-dihydro-2H-pyran-2-one, 3,4-dihydro-2H-1,3-oxazine, 3,6-dihydro-2H-1,3-oxazine, 1,2,3,4-tetrahydroopyrimidine, and the like. The adjacent two ring atoms in the above monocyclic heterocyclyl, including C—C, N—C, may be optionally fused to the cycloalkyl, heterocyclyl, aryl or heteroaryl as defined herein, such as, monocyclic cycloalkyl ring, monocyclic heterocyclyl ring, monoaryl ring, 5- or 6-membered monoheteroaryl ring and the like, to form a fused polycyclyl. The adjacent two ring atoms in the above monocyclic heterocyclyl fused to another ring is preferably C—C. In the present invention, each of the above types of heterocyclyl may be optionally substituted. If substituted, the substituent(s) are preferably one or more substituents as described in the present disclosure.
As used herein, the terms “C6-14 aryl”, “C6-14 aryl ring” and “C6-14 aromatic ring” are used interchangeably to refer to all-carbon monocyclyl, all-carbon polycyclyl (a ring is linked to another by a covalent bond, non-fused) or all-carbon fused polycyclyl (i.e., a pair of adjacent carbon atoms are shared between the ring) groups having 6 to 14 ring atoms, wherein at least one ring is aromatic, that is, has a n electron conjugated system. The C6-10 aryl is preferred. The C6-14 aryl group in the present invention includes monocyclic aryl, polyocyclic aryl and aromatic fused polycyclyl. Among others, examples of monocyclic aryl group include phenyl, and examples of polycyclic aryl include biphenylyl, and the like.
In the present invention, if the C6-14 aryl is an aromatic fused polycyclyl, the aromatic fused polycyclyl maybe a polycyclyl group formed by fusing a monoaryl ring to one or more monoaryl rings. Non-limiting examples include naphthyl, anthryl, and the like.
In certain embodiments of the present invention, the aromatic fused polycyclyl may be a polycyclyl group formed by fusing a monoaryl ring (such as phenyl) to one or more non-aromatic rings, wherein the ring attached to the parent structure is an aromatic or non-aromatic ring. The non-aromatic ring includes, but is not limited to, 3- to 6-membered monocyclic heterocyclyl ring (preferably a 5- or 6-membered monocyclic heterocyclyl ring, the carbon atom in the ring of the monocyclic heterocyclyl may be replace by 1 or 2 oxo groups to form a structure of cyclic lactam or cyclic lactone), 3- to 6-membered monocyclic cycloalkyl ring (preferably 5- or 6-membered monocyclic cycloalkyl ring, the carbon atom in the ring of the monocyclic cycloalkyl may be replace by 1 or 2 oxo groups to form a structure of cyclic ketone). The above polycyclyl group formed by fusing a monoaryl ring to one or more non-aromatic rings may be linked to other moiety or the parent structure through a nitrogen atom or carbon atom. The ring attached to the parent structure is an aromatic or non-aromatic ring.
In the present disclosure, the 9- or 10-membered aromatic fused dicyclyl formed by fusing a phenyl to a 5- or 6-membered monocyclic heterocyclyl ring means that the adjacent two substitutes in the phenyl together with the ring atom attached thereto form a fused 5- or 6-membered monocyclic heterocyclyl ring defined as above. The formed the 9- or 10-membered aromatic fused dicyclyl may also be referred to as a 9- or 10-membered phenylheterocyclyl ring.
In the present disclosure, the 9- or 10-membered aromatic fused dicyclyl formed by fusing a phenyl to a 5- or 6-membered monocyclic cycloalkyl ring means that the adjacent two substitutes in the phenyl together with the ring atom attached thereto form a fused 5- or 6-membered monocyclic cycloalkyl ring defined as above. The formed the 9- or 10-membered aromatic fused dicyclyl may also be referred to as a 9- or 10-membered phenylcycloalkyl ring. The non-limiting examples include:
In the present invention, each of the above types of aryl may be substituted or unsubstituted. If substituted, the substituent(s) are preferably one or more substituents as described in the present disclosure.
As use herein, the terms “heteroaryl”, “heteroaryl ring” and “heteroarylcycle” are used exchangeably to refer to a monocyclic or fused polycyclic group having a ring atom being replaced by at least one heteroatom selected from the group consisting of nitrogen, oxygen or sulfur (i.e., a pair of adjacent ring atoms, which may be C—C or N—C, are shared), wherein the nitrogen and sulfur atoms may be optionally oxidized, and the nitrogen atom may be optionally quaternized. The heteroaryl group has 6, 10 or 14 π electrons as shared, and in the group least one ring is aromatic. The terms “C5-14 heteroaryl” and 5- to 14-membered heteroaryl” refer to a heteroaryl having 5 to 14 ring atoms wherein 1, 2, 3 or 4 ring atoms are heteroatoms, preferably, a heteroaryl having 5 to 10 ring atoms wherein 1, 2, 3 or 4 ring atoms are heteroatoms. The C5-14 heteroaryl in the present invention may be a monoheteroaryl, fused dicyclic heteroaryl or fused tricyclic heteroaryl.
As used therein, the term “5- or 6-membered monoheteroaryl” refers to a monocyclic heteroaryl having 5 or 6 ring atoms, wherein 1, 2 or 3 ring atoms are heteroatom. Specific examples of monoheteroaryl include, but are not limited to, thiophene, furan, thiazole, isothiazole, imidazole, oxazole, pyrrole, pyrazole, triazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,5-triazole, 1,3,4-triazole, tetrazole, isoxazole, oxadiazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine and the like.
As used herein, the term “8- to 10-membered biheteroaryl” refers to a fused bicyclic heteroaryl having 8 to 10 ring atoms, wherein 1, 2, 3, 4 or 5 ring atoms are heteroatoms. The fused bicyclic heteroaryl may be either a bicyclic group (preferrably, 9- or 10-membered biheteroaryl ring) formed by fusing a monoaryl ring (such as phenyl) to a monoheteroaryl ring (preferably, 5- or 6-membered monoheteroaryl ring), or a bicyclic group formed by fusing a monoheteroaryl ring (preferably, 5- or 6-membered monoheteroaryl ring) to a monoheteroaryl ring (preferably, 5- or 6-membered monoheteroaryl ring).
Any 2 adjacent ring atoms in the above monoheteroaryl ring, including C—C, N—C, N—N, may be fused to the cycloalkyl, heterocyclyl, aryl or heteroaryl such as the monocyclic cycloalkyl ring, monocyclic heterocyclyl ring, monoaryl ring, 5- or 6-membered monoheteroaryl ring and the like as define in the present disclosure, to form a fused polycyclyl. The 2 adjacent ring atoms in the monoheteroaryl ring, which are fused to another ring to form a fused ring, are preferably C—C, and include in a non-limiting way the forms of:
Non-limiting examples of 8- to 10-membered biheteroaryl include benzo[d]isoxazole, 1H-indole, isoindole, 1H-benzo[d]imidazole, benzo[d]isothiazole, 1H-benzo[d][1,2,3]triazole, benzo[d]oxazole, benzo[d]thiazole, indazole, benzofuran, benzo[b]thiophene, quinoline, isoquinoline, quinazoline, quinoxaline, cinnoline, pyrido[3,2-d]pyrimidine, pyrido[2,3-d]pyrimidine, pyrido[3,4-d]pyrimidine, pyrido[4,3-d]pyrimidine, 1,8-naphthyridine, 1,7-naphthyridine, 1,6-naphthyridine, 1,5-naphthyridine, pyrazolo[1,5-a]pyrimidine, imidazolo[1,2-b]pyridazine, and the like.
The above monoheteroaryl, or the biheteroaryl formed by fusing a phenyl to a monoheteroaryl ring, or the biheteroaryl formed by fusing a monoheteroaryl ring to a monoheteroaryl ring may be linked to other moiety or the parent structure through a nitrogen atom or carbon atom. In the case of a biheteroaryl, the ring linked to the parent structure is a monoheteroaryl ring or phenyl ring. Specific examples include, but are not limited to:
In certain embodiments of the present invention, the fused bicyclic heteroaryl or fused tricyclic heteroaryl may be a polycyclic group formed by fusing a monoheteroaryl ring (preferably, 5- or 6-membered monoheteroaryl ring) to one or more non-aromatic ring, wherein the ring linked to the parent structure is the monoheteroaryl ring or the non-aromatic ring. The non-aromatic ring includes, but is not limited to, 3- to 6-membered monocyclic heterocyclyl ring (preferably, 5- or 6-membered monocyclic heterocyclyl ring, the ring carbon atom in the monocyclic heterocyclyl ring may be replaced by 1 to 2 oxo groups, to form a structure of cyclic lactam or cyclic lactone), 3- to 6-membered monocyclic cycloalkyl ring (preferably, 5- or 6-membered monocyclic cycloalkyl ring, the ring carbon atom in the monocyclic cycloalkyl ring may be replace by 1 to 2 oxo, to form a structure of cyclic ketone) and the like. The polycyclic group formed by fusing a monoheteroaryl ring to one or more non-aromatic ring may be linked to other moiety or the parent structure through a nitrogen atom or carbon atom, and the ring linked to the parent structure is a monoheteroaryl ring or non-aromatic ring.
In the present disclosure, the 8- to 10-membered fused bicyclic heteroaryl formed by fusing a 5- or 6-membered monoheteroaryl ring to a 5- or 6-membered monocyclic heterocyclyl ring means that the adjacent two substitutes in the 5- or 6-membered monoheteroaryl together with the ring atom attached thereto form a fused 5- or 6-membered monocyclic heterocyclyl ring as defined above. The formed the 8- to 10-membered fused bicyclic heteroaryl may also be referred to as 8- to 10-membered heteroaryl heterocyclyl ring.
In the present disclosure, the 8- to 10-membered fused bicyclic heteroaryl formed by fusing a 5- or 6-membered monoheteroaryl ring to a 5- or 6-membered monocyclic cycloalkyl ring means that the adjacent two substitutes in the 5- or 6-membered monoheteroaryl together with the ring atoms attached thereto form a fused 5- or 6-membered monocyclic cycloalkyl ring as defined above. The formed the 8- to 10-membered fused bicyclic heteroaryl may also be referred to as 8- to 10-membered heteroaryl cycloalkyl ring. Non-limiting examples include:
In the present invention, each of the above types of heteroaryl may be substituted or unsubstituted. When substituted, the substituent(s) are preferably one or more substituents as described in the present disclosure.
As used herein, the term “3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl” refers to a saturated or partially unsaturated (such as, including one or two double bonds) all-carbon monocyclic group having 3 to 6 ring atoms. The ring carbon atoms in the monocyclic cycloalkyl may be optionally replaced by 1, 2 or 3 oxo groups, to form a structure of cyclic ketone. Examples of 3- to 6-membered saturated or partially unsaturated monocyclic cycloalkyl include (but are not limited to): cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexdienyl, cyclobutanone, cyclobutan-1,2-dione, cyclopentanone, cyclopentan-1,3-dione, cyclohexanone, cyclohexan-1,3-dione, and the like.
As used herein, the term “hydroxyl” refers to —OH.
As used herein, the term “hydroxylmethyl” refers to —CH2OH, and “hydroxyethyl” refers to —CH2CH2OH or —CH(OH)CH3.
As used herein, the term “cyanomethyl” refers to —CH2CN, and “cyanoethyl” refers to —CH2CH2CN or —CHCNCH3.
As used herein, the term “amino” refers to —NH2.
As used herein, the term “cyano” refers to —CN.
As used herein, the term “nitro” refers to —NO2.
As used herein, the term “benzyl” refers to —CH2-phenyl.
As used herein, the term “oxo group” refers to ═O.
As used herein, the term “carboxyl” refers to —C(O)OH.
As used herein, the term “carboxylic ester group” refers to —C(O)O(alkyl) or —C(O)O(cycloalkyl).
As used herein, the term “acetyl” refers to —COCH3.
As used herein, the term “substituted” means that any one or more hydrogen atoms on a particular atom are replaced with substituents, including deuterium and hydrogen variants, as long as the valence of a particular atom is normal and the substituted compound is stable. When the substituent is an oxo group (i.e., ═O), it means that two hydrogen atoms are replaced. Replacement of an oxo group does not occur on aromatic groups. The term “optionally substituted” means that it may or may not be substituted. Unless otherwise specified, the type and number of substituents may be arbitrary on the basis of being chemically achievable.
When any variant (e.g., R) occurs more than once in the constitution or structure of a compound, its definition in each case is independent. Thus, for example, if a group is substituted by 0-2 R, the group may optionally be substituted with up to two R, and R in each case has an independent option. In addition, combinations of substituents and/or variants thereof are permissible only if such combinations result in stable compounds.
The test results show that the compound of the present invention as an RIPK1 inhibitor has high inhibitory activity on both enzymes and cells, wherein the IC50 value for U937 cells is 0.001 μM-1 μM, or 0.001 μM-0.3 μM, or 0.001 μM-0.1 μM. Therefore, the compound of the present invention demonstrates great potential for the development as a therapeutic drug and is very promising to be developed into a drug.
The compound of the present invention can be prepared by a variety of synthetic methods well known to those skilled in the art, including the specific embodiments listed below, the embodiments obtained by combining those listed below with other chemical synthesis methods, and the equivalent alternatives well known to those skilled in the art. Preferred embodiments include, but are not limited to, the Examples of the present invention.
The present invention is illustrated in details by means of the Examples, but is not meant to be unfavorably limited thereto. In the present disclosure, the present invention has been described in details, wherein specific embodiments thereof are also disclosed. It will be apparent to those skilled in the art that various changes and modifications can be made to the specific embodiments of the present invention without departing from the spirit and scope of the present invention. If specific conditions are not indicated in the Examples, it shall be carried out in accordance with conventional conditions or those recommended by the manufacturer. The reagents or instruments without their manufacturers indicated are all conventional products that can be purchased commercially. PTLC is preparative thin layer chromatography.
Step 1: Methyl 5-bromo-2-oxo-1,2-dihydropyridine-3-carboxylate (1.0 g, 4.31 mmol), methyl iodide (0.81 ml, 12.93 mmol), potassium carbonate (1.19 g, 8.62 mmol), methanol (12 ml) and N,N-dimethylformamide (12 ml) were added into a 100 mL round-bottomed flask. The reaction was carried out overnight at room temperature. Thereafter, 50 ml water was added. The resultant mixture was extracted with 50 ml ethyl acetate for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated to give methyl 5-bromo-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate (404 mg, yield (hereinafter referred to as Y): 31%). ES-API: [M+H]+=247.0.
Step 1: 20 mL of anhydrous N,N-dimethylformamide and sodium hydride (790 mg, 18.10 mmol), and finally 2,6-difluorobenzene (2.0 g, 14.48 mmol) were added into a 50 mL three-necked round-bottomed flask under the protection of nitrogen gas. The mixture was stirred at room temperature for 30 minutes. Then, cyclopentyl methanol (1.45 g, 14.48 mmol) was added in batches. After the addition, the mixture was slowly warmed up to 50° C., and stirred for another 5 hours. After the reaction mixture was cooled to room temperature, 80 mL of ethyl acetate was added into the system. The resultant mixture was washed twice with saturated ammonium chloride and sodium chloride sequentially (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate, and then filtered. The filtrate was spin-dried to give the target compound of 2-(cyclopentylmethoxy)-6-fluorobenzonitrile (3.0 g, Y: 95%). ES-API: [M+H]+=219.
Step 2: 10 mL Anhydrous tetrahydrofuran, 2-(cyclopentylmethoxy)-6-fluorobenzonitrile (500 mg, 2.293 mmol), and finally borane-dimethyl sulfide complex (11.46 ml, 22.93 mmol) were added in a 50 mL three-necked round-bottomed flask under the protection of nitrogen gas. The resultant mixture was stirred at room temperature for 1 hour, and then was heated under reflux for another 3 hours. After the reaction mixture was cooled to room temperature, 40 mL 1M hydrochloric acid solution was slowly added dropwise. The resultant mixture was concentrated under reduced pressure so that about 20 mL of solvent was left. The concentrate was washed once with 40 mL dichloromethane. The aqueous phase was adjusted to be basic with sodium bicarbonate, and then was extracted twice with 60 mL of ethyl acetate (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and purified with PTLC [petroleum ether:ethyl acetate=1:9, volume ratio (referred to as v/v hereinafter)] to give the target compound of (2-(cyclopentylmethoxy)-6-fluorophenyl)methylamine (602 mg, crude product). ES-API: [M+H]+=224.
Step 1: 12 ml of anhydrous N,N-dimethylformamide, sodium hydride (395 mg, 9.051 mmol), and finally 2,5-difluorobenzene (1.0 g, 7.241 mmol) were added into a 50 mL three-necked round-bottomed flask under the protection of nitrogen gas. The mixture was stirred at room temperature for 30 minutes. Then, cyclopentanol (1.45 g, 16.95 mmol) was added in batches. After the addition, the mixture was slowly warmed up to 50° C., and stirred for another 5 hours. After the reaction mixture was cooled to room temperature, 80 mL of ethyl acetate was added into the system. The resultant mixture was washed twice with saturated ammonium chloride and sodium chloride sequentially (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate, and then filtered. The filtrate was spin-dried to give the target compound of 2-(cyclopentyloxy)-5-fluorobenzonitrile (1.52 g, crude product). ES-API: [M+H]+=206.1.
Step 2: 10 mL of anhydrous tetrahydrofuran, 2-(cyclopentyloxy)-5-fluorobenzonitrile (600 mg, 2.353 mmol), and finally borane-dimethyl sulfide complex (11.7 mL, 23.53 mmol) were added into a 50 mL three-necked round-bottomed flask under the protection of nitrogen gas. The resultant mixture was stirred at room temperature for 1 hour, and then was heated under reflux for another 3 hours. After the reaction mixture was cooled to room temperature, 50 mL of 1M hydrochloric acid solution was slowly added dropwise. The resultant mixture was concentrated under reduced pressure so that about 30 mL of solvent was left. The concentrate was washed once with 50 mL of dichloromethane. The aqueous phase was adjusted to be basic with sodium bicarbonate, and then was extracted twice with 70 mL of ethyl acetate (70 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate, and then filtered. The filtrate was spin-dried, and purified with PTLC [petroleum ether:ethyl acetate=1:9, v/v] to give the target compound of (2-(cyclopentyloxy)-5-fluorophenyl)methylamine (200 mg, Y: 37%). ES-API: [M+H]+=210.
Step 1: (4-Fluorobenzyl)triphenylphosphine chloride (4.9 g, 12.045 mmol) was added to a solution of potassium tert-butoxide (1.239 g, 11.042 mmol) in tetrahydrofuran (30 ml) in batches. The reaction mixture was stirred at room temperature for 45 minutes. Next, A solution of tert-butyl 3-oxopiperidine-1-carboxylate (2 g, 10.038 mmol) in tetrahydrofuran (20 ml) was slowly added dropwise to the above solution while maintaining internal temperature of the reaction solution at 20° C. After the addition, the reaction solution was stirred overnight at room temperature. As the LCMS shows that the reaction was completed, the reaction solution was added to ethyl acetate (50 ml) and water (50 ml) in batches. The aqueous phase was extracted with ethyl acetate (60 ml) for 3 times. The organic phases were combined, dried and filtered. The filtrate was concentrated to obtain a crude product, which was purified by column chromatography (ethyl acetate:petroleum ether=1:50-1:10) to give tert-butyl 3-(4-fluorobenzylidene)piperidine-1-carboxylate as a yellow liquid (335 mg, Y: 10%). ES-API: [M+H]+=292.1.
Step 2: 72 mg of 10% Pd/C was added to a solution of tert-butyl 3-(4-fluorobenzylidene)piperidine-1-carboxylate (335 mg, 1.151 mmol) in ethanol (15 ml) under the protection of hydrogen gas. The reaction solution was stirred overnight at room temperature. The resultant mixture was filtered through celite, and concentrated to give a crude product of tert-butyl 3-(4-fluorobenzyl)piperidine-1-carboxylate (334 mg, Y: 73%). ES-API: [M+H]+=294.1.
Step 3: tert-Butyl 3-(4-fluorobenzyl)piperidine-1-carboxylate (334 mg, 1.140 mmol) was dissolved in 6 mL of 4N hydrogen chloride in dioxane. The reaction solution was stirred at room temperature for 2 hours, and then concentrated to give a crude product of 3-(4-fluorobenzyl)piperidine (220 mg, Y: 100%). ES-API: [M+H]+=194.1.
Step 1: A solution obtained by dissolving cyclopentanol (1.5 g, 17.416 mmol) in 30 ml of tetrahydrofuran was cooled to 0° C. in an ice-water bath. Sodium hydride (766 mg, 19.157 mmol) was added to the above solution in batches. The reaction solution was stirred at 0° C. for 1 hour. Next, 2,6-difluorobenzonitrile (2.423 g, 17.416 mmol) was added. The reaction solution was heated to 50° C. and stirred overnight. As the LCMS shows that the reaction was completed, the reaction was quenched in an ice-water bath. The resultant mixture was extracted with 50 mL of ethyl acetate for three times. The organic phases were combined, washed with 30 mL of saturated brine for three times, dried, and concentrated to give a crude product of 2-(cyclopentyloxy)-6-fluorobenzonitrile (2.6 g, Y: 73%). ES-API: [M+H]+=206.1.
Step 2: 2-(Cyclopentyloxy)-6-fluorobenzonitrile (1.1 g, 5.366 mmol) was dissolved in tetrahydrofuran (25 mL). A solution of 2 M borane in tetrahydrofuran (13.5 mL) was added at room temperature. The reaction solution was heated under reflux overnight. As the LCMS shows that the reaction was completed, the reaction solution was cooled to room temperature. Methanol was slowly added dropwise to quench the reaction. The reaction solution was concentrated. The crude product was dissolved in 1N hydrochloric acid (25 mL). The resultant solution was extracted with 30 mL of dichloromethane for three times, and concentrated to give a crude product of (2-(cyclopentyloxy)-6-fluorophenyl)methylamine (680 mg, Y: 61%). ES-API: [M+H]+=210.1.
Step 1: 2-Hydroxybenzonitrile (2.0 g, 16.79 mmol) and acetonitrile (100 ml) were added to a 250 mL round-bottomed flask. The mixture was stirred at room temperature. Next, (chloromethyl)cyclopropane (2.13 g, 23.51 mmol) and potassium carbonate (9.28 g, 67.16 mmol) were added. The reaction was carried out overnight at 75° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with 100 ml of ethyl acetate for three times was concentrated to give a crude product of 2-(cyclopropylmethoxy)benzonitrile (596 mg, Y: 20%).
Step 2: 2-(Cyclopropylmethoxy)benzonitrile (596 mg, 3.45 mmol) and tetrahydrofuran (20 ml) were added to a 100 mL three-necked round-bottomed flask, and stirred at room temperature. Next, borane-dimethyl sulfide complex (2M, 5.72 ml, 11.44 mmol) were slowly added dropwise. The reaction was carried out at 85° C. for 1 hour. After the reaction mixture was cooled to room temperature, diluted hydrochloric acid (1M, 11.44 ml, 11.44 mmol) was added dropwise. The reaction was carried out at 85° C. for another 30 minutes. The resultant reaction mixture was cooled to room temperature, and concentrated at reduce pressure to give a crude product of (2-(cyclopropylmethoxy)phenyl)methylamine hydrochloride (350 mg, Y: 50%).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato)diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (dichloromethane:methanol=15:1) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, 3 mmol), 1-(2-(trifluoromethoxy)phenyl)ethyl-1-amine (738 mg, 3.6 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (2.0 g, 4.5 mmol), triethylamine (1.2 ml, 9 mmol), and N,N-dimethylformamide (10 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out overnight at room temperature. 50 mL of ethyl acetate was added to the reaction mixture. The resultant mixture was washed with 30 mL of water for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The obtained concentrate was subjected to a column chromatography (dichloromethane:methanol=15:1) to give 5-(2-aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (380 mg, Y: 32%). ES-API: [M+H]+=489.0, 1H NMR (400 MHz, CD3OD) δ 8.53 (d, J=2.6 Hz, 1H), 8.40 (d, J=2.6 Hz, 1H), 7.84 (d, J=1.8 Hz, 1H), 7.61-7.54 (m, 1H), 7.50 (d, J=1.9 Hz, 0H), 7.48 (d, J=1.9 Hz, 1H), 7.43 (d, J=8.4 Hz, 1H), 7.39-7.34 (m, 2H), 7.31 (ddd, J=5.8, 4.5, 2.7 Hz, 1H), 5.51 (q, J=7.0 Hz, 1H), 4.58 (s, 1H), 4.12 (s, 3H), 1.55 (d, J=7.0 Hz, 3H).
Step 5: The above compound of 5-(2-aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide Z1 (100 mg, 0.2 mmol) was subjected to chiral resolution by SFC (co-solvent: methanol (ammonia containing 0.2% methanol); column type: (R,R)-Whelk-O1 (4.6*100 mm*5 um); flow rate: 1.4 ml/min; temperature: 40° C.) to give the compounds (Z1-1 and Z1-2): (S)-5-(2-aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl) nicotinamide (an arbitrarily assigned absolute configuration, 33 mg, ee value: >99%, peak 1, retention time: 2.15 min). ES-API: [M+H]+=489.1. (R)-5-(2-aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl) nicotinamide (an arbitrarily assigned absolute configuration, 28 mg, ee value: >99%, peak 2, retention time: 3.09 min). ES-API: [M+H]+=489.1.
Step 1: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (600 mg, 1.905 mmol), lithium hydroxide monohydrate (762 mg, 19.05 mmol), 10 mL of tetrahydrofuran, 10 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 6 mL water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 40 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (900 mg, crude product) ES-API: [M+H]+=302.1.
Step 2: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (225 mg, 0.4762 mmol) and 15 mL N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-(trifluoromethoxy)phenyl)methylamine (137 mg, 0.7413 mmol), triethylamine (480 mg, 4.672 mmol), and BOP reagent (330 mg, 0.7467 mmol) were added sequentially. The reaction was carried out overnight at room temperature under the protection of nitrogen gas. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (50 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-N-(2-(trifluoromethoxy)benzyl)nicotinamide Z2 (54.1 mg, Y: 23%). ES-API: [M+H]+=475.1. 1H NMR (400 MHz, DMSO-d6) δ 8.87 (t, J=6.0 Hz, 1H), 8.58 (d, J=2.5 Hz, 1H), 8.33 (d, J=2.5 Hz, 1H), 8.00 (d, J=1.8 Hz, 1H), 7.55 (s, 2H), 7.49 (td, J=9.1, 2.5 Hz, 2H), 7.42-7.31 (m, 4H), 4.56 (d, J=6.0 Hz, 2H), 4.00 (s, 3H).
Step 1: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (600 mg, 1.905 mmol), lithium hydroxide monohydrate (762 mg, 19.05 mmol), 10 mL of tetrahydrofuran, 10 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction at room temperature for 3 hours. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 6 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 40 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (900 mg, crude product). ES-API: [M+H]+=302.1.
Step 2: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (225 mg, 0.4762 mmol) and 15 mL of N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(3-(trifluoromethoxy)phenyl)ethyl-1-amine (146.54 mg, 0.7143 mmol), triethylamine (480 mg, 4.672 mmol), and BOP reagent (330 mg, 0.7467 mmol) were added sequentially. The reaction was carried out overnight at room temperature under the protection of nitrogen gas. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (50 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-N-(1-(3-(trifluoromethoxy)phenyl)ethyl) nicotinamide Z3 (40 mg, Y: 17%). ES-API: [M+H]+=489.1. 1H NMR (400 MHz, DMSO-d6) δ 8.73 (d, J=7.9 Hz, 1H), 8.55 (d, J=2.5 Hz, 1H), 8.15 (d, J=2.5 Hz, 1H), 7.99 (d, J=1.8 Hz, 1H), 7.61-7.33 (m, 7H), 7.21 (d, J=7.2 Hz, 1H), 5.16 (p, J=7.0 Hz, 1H), 3.97 (s, 3H), 1.44 (d, J=7.0 Hz, 3H).
Step 1: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (600 mg, 1.905 mmol), lithium hydroxide monohydrate (762 mg, 19.05 mmol), 10 mL of tetrahydrofuran, 10 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction at room temperature for 3 hours. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 6 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 40 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (900 mg, crude product). ES-API: [M+H]+=302.1.
Step 2: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (225 mg, 0.4762 mmol) and 15 mL of N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (3-(trifluoromethoxy)phenyl)methylamine (137 mg, 0.7413 mmol), triethylamine (480 mg, 4.672 mmol), and BOP reagent (330 mg, 0.7467 mmol) were added sequentially. The reaction was carried out overnight at room temperature under the protection of nitrogen gas. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (50 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-N-(3-(trifluoromethoxy)benzyl)nicotinamide Z4 (56 mg, Y: 25%). ES-API: [M+H]+=475.1. 1H NMR (400 MHz, dmso-d6) δ 8.94 (t, J=5.9 Hz, 1H), 8.57 (d, J=2.5 Hz, 1H), 8.29 (d, J=2.5 Hz, 1H), 8.00 (d, J=1.5 Hz, 1H), 7.63-7.42 (m, 4H), 7.41-7.28 (m, 3H), 7.22 (d, J=7.8 Hz, 1H), 4.54 (d, J=5.9 Hz, 2H), 3.98 (s, 3H).
Step 1: 5-(2-Aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (180 mg, 0.37 mmol), acetyl chloride (44 mg, 0.56 mmol), triethylamine (112 mg, 1.11 mmol), and dichloromethane (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out in an ice-water bath for 5 minutes. 10 ml of water was added. The resultant mixture was extracted with 20 ml of dichloromethane for three times. The organic phases were combined, dried over anhydrous sodium sulfate. The organic phase was concentrated, and separated by thin layer chromatography (dichloromethane:methanol=15:1) to give 5-(2-acetylaminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl) nicotinamide Z5 (141 mg, Y: 71.9%). ES-API: [M+H]+=531.2, 1H NMR (400 MHz, DMSO) δ 12.38 (s, 1H), 8.76 (d, J=7.6 Hz, 1H), 8.63 (d, J=2.5 Hz, 1H), 8.30 (s, 1H), 8.25 (d, J=2.5 Hz, 1H), 7.77 (d, J=8.4 Hz, 1H), 7.74-7.69 (m, 1H), 7.67-7.57 (m, 1H), 7.38 (dd, J=6.5, 2.8 Hz, 2H), 7.33 (s, 1H), 5.44-5.34 (m, 1H), 4.00 (s, 3H), 2.18 (s, 3H), 1.42 (d, J=7.0 Hz, 3H).
Step 2: The above compound of 5-(2-acetylaminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide Z5 (125 mg, 0.24 mmol) was subjected to chiral resolution by SFC (Co-solvent: methanol (ammonia containing 0.2% methanol); column type: (S,S)-WHELK-O1 (4.6*100 mm*5 um); flow rate: 1.4 ml/min; temperature: 40° C.) to give the compounds (Z5-1 and Z5-2): (S)-5-(2-acetylaminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl) ethyl) nicotinamide (an arbitrarily assigned absolute configuration, 41 mg, ee value: 99%, peak 1, retention time: 2.77 min). ES-API: [M+H]+=531.2. (R)-5-(2-acetylaminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy) phenyl) ethyl) nicotinamide (an arbitrarily assigned absolute configuration, 39 mg, ee value: 98.9%, peak 2, retention time: 3.72 min). ES-API: [M+H]+=531.2.
Step 1: 5-(2-Aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (190 mg, 0.39 mmol), cyclopropanecarbonyl chloride (61 mg, 0.59 mmol), triethylamine (118 mg, 1.17 mmol), and dichloromethane (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out for 5 minutes in an ice-water bath. 10 ml of water was added. The resultant mixture was extracted with 20 ml of dichloromethane for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated to give 5-(2-(cyclopropylcarbonylamino)benzo[d]thiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (145 mg, Y: 66%). ES-API: [M+H]+=557.2.
Step 2: The above compound of 5-(2-(cyclopropylcarbonylamino)benzo[d]thiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy) phenyl) ethyl) nicotinamide Z6 (121 mg, 0.22 mmol) was subjected to chiral resolution by SFC (Co-solvent: methanol (ammonia containing 0.2% methanol); column type: S,S-WHELK-O1 (4.6*100 mm*5 um); flow rate: 1.4 ml/min; temperature: 40° C.) to give the compounds (Z6-1 and Z6-2): (S)-5-(2-(cyclopropylcarbonylamino)benzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (an arbitrarily assigned absolute configuration, 39 mg, ee value: 99%, peak 1, retention time: 2.94 min). ES-API: [M+H]+=557.2. (R)-5-(2-(cyclopropylcarbonylamino)benzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy) phenyl) ethyl) nicotinamide (an arbitrarily assigned absolute configuration, 38 mg, ee value: 98%, peak 2, retention time: 3.99 min). ES-API: [M+H]+=557.2.
Step 1: Methyl 5-bromo-6-methoxynicotinate (150 mg, 0.60971 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (180 mg, 0.6521 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (99.8 mg, 0.1219 mmol), and sodium carbonate (260 mg, 2.452 mmol), and finally 15 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out under microwave at 120° C. for 30 minutes. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (60 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinate (108 mg, Y: 56%). ES-API: [M+H]+=315.8.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinate (108 mg, 0.3428 mmol), lithium hydroxide monohydrate (137.14 mg, 3.428 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction at room temperature for 3 hours. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 6 mL water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 40 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinic acid (97 mg, crude product). ES-API: [M+H]+=301.8.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)-6-methoxynicotinic acid (97 mg, 0.3222 mmol) and 15 mL anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethyl-1-amine (99.10 mg, 0.4834 mmol), triethylamine (325 mg, 3.222 mmol) and BOP reagent (213.6 mg, 0.4834 mmol) were added sequentially. The reaction was carried out overnight at room temperature under the protection of nitrogen gas. 90 mL Ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (60 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxy-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide Z7 (36 mg, Y: 25%). ES-API: [M+H]+=488.5. 1H NMR (400 MHz, DMSO-d6) δ 8.90 (d, J=7.3 Hz, 1H), 8.59 (d, J=2.3 Hz, 1H), 8.22 (d, J=2.3 Hz, 1H), 7.87 (d, J=1.5 Hz, 1H), 7.61-7.54 (m, 3H), 7.42 (dd, J=8.3, 1.8 Hz, 1H), 7.38-7.33 (m, 3H), 7.31 (d, J=1.6 Hz, 1H), 5.40 (dd, J=14.4, 7.3 Hz, 1H), 3.91 (s, 3H), 1.42 (d, J=7.0 Hz, 3H).
Step 1: Methyl 5-bromo-6-chloronicotinate (200 mg, 0.7985 mmol), lithium hydroxide monohydrate (319.4 mg, 7.985 mmol), 3 mL of tetrahydrofuran, 3 mL of methanol and 3 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 7 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 50 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-bromo-6-chloronicotinic acid (233 mg, crude product). ES-API: [M+H]+=201.9.
Step 2: 5-Bromo-6-chloronicotinic acid (230 mg, 0.7985 mmol) and 20 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethyl-1-amine (245.5 mg, 1.197 mmol), triethylamine (806 mg, 7.985 mmol) and BOP reagent (529.38 mg, 1.1977 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried, followed by PTLC [dichloromethane:methanol=10:1, v/v] to give 5-bromo-6-chloro-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (244 mg, Y: 72%).
Step 3: 5-Bromo-6-chloro-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (100 mg, 0.2358 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (165 mg, 0.2358 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (38 mg, 0.05184 mmol), and sodium carbonate (75 mg, 0.7075 mmol), and finally 10 mL of dioxane and 2 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 2 minutes. The reaction was carried out under microwave at 120° C. for 30 minutes. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (30 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound 5-(2-aminobenzo[d]thiazol-6-yl)-6-chloro-N-(1-(2-(trifluoromethoxy)phenyl)ethyl) nicotinamide Z8 (4.1 mg, Y: 3.56%). ES-API: [M+H]+=492.5. 1H NMR (400 MHz, DMSO-d6) δ 9.15 (d, J=7.1 Hz, 1H), 8.77 (d, J=2.1 Hz, 1H), 8.32 (d, J=2.1 Hz, 1H), 7.82 (s, 1H), 7.64 (s, 2H), 7.60-7.55 (m, 1H), 7.44-7.26 (m, 5H), 5.48-5.33 (m, 1H), 1.42 (d, J=7.1 Hz, 3H).
Step 1: Methyl 5-bromonicotinate (300 mg, 1.388 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (462 mg, 1.674 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (227 mg, 0.9096 mmol), and sodium carbonate (441 mg, 4.160 mmol), and finally 15 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out under microwave at 110° C. for 30 minutes. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (60 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (100 mg, Y: 25%). ES-API: [M+H]+=286.1.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (100 mg, 0.3508 mmol), lithium hydroxide monohydrate (140.3 mg, 3.508 mmol), 3 mL of tetrahydrofuran, 3 mL of methanol, and 3 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction at room temperature for 8 hours. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 7 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 52 mL of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)nicotinic acid (83 mg, Y: 87%), ES-API: [M+H]+=272.1.
Step 3: 5-(2-aminobenzo[d]thiazol-6-yl)nicotinic acid (83 mg, 0.3062 mmol) and 16 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (94.2 mg, 0.4594 mmol), triethylamine (309 mg, 3.062 mmol), and BOP reagent (203 mg, 0.4594 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 3 hours. 60 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (40 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(2-(trifluoromethoxy) phenyl)ethyl)nicotinamide Z9 (25 mg, Y: 17.8%). ES-API: [M+H]+=458.6. 1H NMR (400 MHz, DMSO-d6). δ 9.12 (d, J=7.3 Hz, 1H), 8.99 (d, J=1.9 Hz, 1H), 8.90 (d, J=1.6 Hz, 1H), 8.46 (s, 1H), 8.11 (s, 1H), 7.62 (d, J=7.9 Hz, 4H), 7.42 (d, J=8.3 Hz, 1H), 7.35 (dd, J=12.7, 10.0 Hz, 3H), 5.50-5.37 (m, 1H), 1.46 (d, J=7.0 Hz, 3H).
Step 1: Methyl 5-bromo-6-methylnicotinate (300 mg, 1.304 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (540 mg, 1.956 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (150 mg, 0.2046 mmol), sodium carbonate (414.7 mg, 3.912 mmol), and finally 15 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out under microwave at 120° C. for 30 minutes. 90 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (70 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-6-methylnicotinate (216 mg, Y: 55.38%). ES-API: [M+H]+=300.1.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-6-methylnicotinate (216 mg, 0.7224 mmol), lithium hydroxide monohydrate (288.9 mg, 7.224 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 60 mL of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-6-methylnicotinic acid (200 mg, 97.5%). ES-API: [M+H]+=286.1.
Step 3: 5-(2-aminobenzo[d]thiazol-6-yl)-6-methylnicotinic acid (200 mg, 0.7017 mmol) and 20 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (220 mg, 1.073 mmol), triethylamine (709 mg, 7.017 mmol), and BOP reagent (676 mg, 1.073 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 80 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (60 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-6-methyl-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide Z10 (14 mg, Y: 4.2%). ES-API: [M+H]+=473.2. 1H NMR (400 MHz, DMSO-d6) δ 9.02 (d, J=7.2 Hz, 1H), 8.84 (d, J=1.7 Hz, 1H), 8.10 (d, J=1.7 Hz, 1H), 7.74 (d, J=1.1 Hz, 1H), 7.58 (s, 3H), 7.41-7.24 (m, 5H), 5.50-5.35 (m, 1H), 3.32 (s, 3H), 1.42 (d, J=7.0 Hz, 3H).
Step 1: 7-Bromo-[1,2,4]triazolo[1,5-a]pyridine-2-amine (2.0 g, 9.39 mmol), bis(pinacolato)diboron (3.58 g, 14.08 mmol), potassium acetate (1.84 g, 18.78 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (766 mg, 0.939 mmol), and 1,4-dioxane (50 ml) were added to a 100 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-amine (2.9 g, Y: 100%). ES-API: [M+H]+=261.2.
Step 2: Methyl 5-bromo-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate (200 mg, 0.812 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-amine (423 mg, 1.63 mmol), sodium carbonate (215 mg, 2.03 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (62.2 mg, 0.0812 mmol), 1,4-dioxane (10 ml) and water (2 ml) were added to a 50 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and separated by thin layer chromatography (dichloromethane:methanol=15:1) to give methyl 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate (78 mg, Y: 32%), ES-API: [M+H]+=300.2.
Step 3: methyl 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylate (78 mg, 0.26 mmol), lithium hydroxide monohydrate (53 mg, 1.3 mmol), tetrahydrofuran (5 ml), methanol (1 ml), and water (1 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid. The resultant mixture was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid (79 mg, Y: 100%). ES-API: [M+H]+=286.2.
Step 4: 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid (79 mg, 0.28 mmol), 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (53 mg, 0.26 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (219 mg, 0.52 mmol), triethylamine (0.1 ml, 0.78 mmol), and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature until the reaction was completed. 50 mL of ethyl acetate was added to the reaction mixture. The resultant mixture was washed with 30 mL of water for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The obtained concentrate was separated by Prep-HPLC to give 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-2-oxo-N-(1-(2-(trifluoro methoxy)phenyl)ethyl)-1,2-dihydropyridine-3-carboxamide Z11 (38 mg, Y: 31%). ES-API: [M+H]+=473.2, 1H NMR (400 MHz, CD3OD) δ 8.74 (d, J=2.8 Hz, 1H), 8.49 (d, J=2.8 Hz, 1H), 8.43 (d, J=7.1 Hz, 1H), 7.58-7.49 (m, 2H), 7.40-7.28 (m, 3H), 7.18 (dd, J=7.1, 2.0 Hz, 1H), 5.51 (q, J=6.8 Hz, 1H), 3.75 (s, 3H).
Step 1: Methyl 5-bromo-2-methylnicotinate (300 mg, 1.304 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (432 mg, 1.565 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (191 mg, 0.2608 mmol), sodium carbonate (415 mg, 3.912 mmol), and finally 15 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out under microwave at 120° C. for 35 minutes. 90 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (70 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methylnicotinate (217 mg, Y: 55.6%). ES-API: [M+H]+=300.1.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methylnicotinate (217 mg, 0.7257 mmol), lithium hydroxide monohydrate (290.3 mg, 7.257 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 60 mL of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methylnicotinic acid (252 mg, crude product), ES-API: [M+H]+=286.1.
Step 3: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methylnicotinic acid (110 mg, 0.3860 mmol) and 4.0 mL anhydrous of N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-(cyclopentylmethoxy)-6-fluorophenyl)methylamine (164 mg, 0.7354 mmol), triethylamine (390 mg, 3.865 mmol), and BOP reagent (324 mg, 0.7354 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 85 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 6 times (60 mL×6). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopentylmethoxy)-6-fluorobenzyl)-2-methylnicotinamide Z12 (12.5 mg, Y: 6%). ES-API: [M+H]+=491.3. 1H NMR (400 MHz, DMSO-d6) δ 8.73 (d, J=2.3 Hz, 1H), 8.54 (t, J=4.3 Hz, 1H), 8.00 (d, J=1.7 Hz, 1H), 7.83 (d, J=2.2 Hz, 1H), 7.57 (s, 2H), 7.52 (dd, J=8.4, 1.9 Hz, 1H), 7.37 (d, J=8.3 Hz, 1H), 7.26 (dd, J=15.3, 8.3 Hz, 1H), 6.84 (d, J=8.4 Hz, 1H), 6.76 (t, J=8.9 Hz, 1H), 4.46 (d, J=3.9 Hz, 2H), 3.88 (d, J=6.8 Hz, 2H), 2.49 (s, 3H), 2.29 (dt, J=14.7, 7.4 Hz, 1H), 1.74 (d, J=7.8 Hz, 2H), 1.58-1.41 (m, 4H), 1.38-1.26 (m, 2H).
Step 1: Methyl 5-bromo-6-methoxynicotinate (200 mg, 0.8130 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (270 mg, 0.9782 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (121.8 mg, 0.1660 mmol), and sodium carbonate (260 mg, 2.440 mmol), and finally 12 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out under microwave at 120° C. for 35 minutes. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-amino benzo[d]thiazol-6-yl)-6-methoxynicotinate (174 mg, Y: 67.7%). ES-API: [M+H]+=316.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinate (174 mg, 0.5506 mmol), lithium hydroxide monohydrate (220 mg, 5.506 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 70 mL of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinic acid (190 mg, crude product), ES-API: [M+H]+=302.1.
Step 3: 5-(2-aminobenzo[d]thiazol-6-yl)-6-methoxynicotinic acid (30 mg, 0.09966 mmol) and 1.0 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-(cyclopentyloxy)-5-fluorophenyl)methylamine (31.24 mg, 0.150 mmol), triethylamine (101 mg, 0.9966 mmol) and BOP reagent (66.3 mg, 0.150 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 6 times (30 mL×6). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopentyloxy)-5-fluorobenzyl)-6-methoxynicotinamide Z13 (7.6 mg, Y: 15%). ES-API: [M+H]+=493.3. 1H NMR (400 MHz, DMSO-d6) δ 8.86 (d, J=5.7 Hz, 1H), 8.63 (d, J=2.3 Hz, 1H), 8.20 (d, J=2.3 Hz, 1H), 7.88 (d, J=1.5 Hz, 1H), 7.55 (s, 2H), 7.44 (dd, J=8.4, 1.7 Hz, 1H), 7.35 (d, J=8.3 Hz, 1H), 7.06-6.90 (m, 3H), 4.81 (s, 1H), 4.38 (d, J=5.6 Hz, 2H), 3.92 (s, 3H), 1.83 (d, J=5.4 Hz, 2H), 1.70 (d, J=11.6 Hz, 4H), 1.54 (d, J=2.0 Hz, 2H).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato)diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml) and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL of water was added to a filtrate obtained by washing the filter cake with 100 mL of ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (dichloromethane:methanol=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml) and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), (2-fluoro-5-(trifluoromethoxy)phenyl)methylamine (56 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol) and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The concentrated organic phase was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-fluoro-5-(trifluoromethoxy)benzyl)-2-methoxynicotinamide Z14 as an off-white powder (15 mg, Y: 11%). ES-API: [M+H]+=493.1. 1H NMR (400 MHz, DMSO-d6) δ 8.97 (t, J=6.0 Hz, 1H), 8.62 (d, J=2.4 Hz, 1H), 8.30 (d, J=2.4 Hz, 1H), 8.03 (d, J=1.6 Hz, 1H), 7.59 (s, 2H), 7.54 (dd, J1=2.0 Hz, J2=8.4 Hz, 1H), 7.41-7.36 (m, 4H), 4.58 (d, J=6.0 Hz, 2H), 4.02 (s, 3H).
Step 1: Methyl 4-bromo-1H-indazole-6-carboxylate (200 mg, 0.78 mmol), methyl iodide (0.145 ml, 2.34 mmol), potassium carbonate (215 mg, 1.56 mmol), methanol (5 ml), and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature. 30 mL of water was added. The resultant mixture was extracted with 30 ml of ethyl acetate for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The concentrate was separated by thin-layer chromatography (petroleum ether/ethyl acetate=7/1) to give methyl 4-bromo-1-methyl-1H-indazole-6-carboxylate (101 mg, Y: 48%), ES-API: [M+H]+=271.1.
Step 2: Methyl 4-bromo-1-methyl-1H-indazole-6-carboxylate (101 mg, 0.38 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-amine (148 mg, 0.57 mmol), sodium carbonate (101 mg, 0.95 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (31 mg, 0.038 mmol), 1,4-dioxane (6 ml), and water (1.2 ml) were added to a 50 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 30 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The concentrate was separated by thin layer chromatography (dichloromethane:methanol=15/1) to give methyl 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylate (86 mg, Y: 70%), ES-API: [M+H]+=323 0.2.
Step 3: Methyl 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylate (86 mg, 0.27 mmol), lithium hydroxide monohydrate (55 mg, 1.35 mmol), tetrahydrofuran (5 ml), methanol (1 ml), and water (1 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 5 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid. The resultant mixture was concentrated. The concentrate was vacuum-dried to give a crude product of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (96 mg, Y: 100%), ES-API: [M+H]+=309.2.
Step 4: 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (96 mg, 0.31 mmol), 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (64 mg, 0.31 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (196 mg, 0.465 mmol), triethylamine (100 mg, 0.93 mmol) and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature until the reaction was completed. 50 mL of ethyl acetate was added to the reaction mixture. The resultant mixture was washed with 30 mL of water for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The obtained concentrate was separated by Prep-HPLC to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-indazole-6-carboxamide Z15 (21 mg, Y: 13.7%), ES-API: [M+H]+=496.3, 1H NMR (400 MHz, DMSO, ppm), δ 9.06 (d, J=7.4 Hz, 1H), 8.65 (d, J=6.7 Hz, 1H), 8.24 (d, J=10.7 Hz, 2H), 7.86 (s, 1H), 7.71 (s, 1H), 7.67-7.58 (m, 1H), 7.40-7.29 (m, 3H), 7.26 (dd, J=6.9, 1.9 Hz, 1H), 6.08 (s, 2H), 5.55-5.40 (m, 1H), 4.13 (s, 3H), 1.49 (d, J=7.0 Hz, 3H).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato) diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74 mmol), [1,1′-bis(diphenyl phosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (methanol:dichloromethane=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), 3-phenylpropan-1-amine (36 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol), and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated to obtain a crude product, which was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-N-(3-phenylpropyl)nicotinamide Z16 as an off-white powder (21.5 mg, Y: 19%). ES-API: [M+H]+=419.1. 1H NMR (400 MHz, DMSO-d6) δ 8.58 (d, J=2.8 Hz, 1H), 8.36 (t, J=6.0 Hz, 1H), 8.28 (d, J=2.8 Hz, 1H), 8.03 (d, J=1.6 Hz, 1H), 7.58 (s, 2H), 7.53 (dd, J1=2.0 Hz, J2=8.4 Hz, 1H), 7.40 (d, J=8.4 Hz, 1H), 7.31-7.23 (m, 4H), 7.20-7.16 (m, 1H), 4.00 (s, 3H), 3.31 (t, J=7.6 Hz, 2H), 2.66 (t, J=7.6 Hz, 2H), 1.88-1.81 (m, 2H).
Step 1: (4-Fluorobenzyl)triphenylphosphine chloride (4.9 g, 12.045 mmol) was added to a solution of potassium tert-butoxide (1.239 g, 11.042 mmol) in tetrahydrofuran (30 ml) in batches. The reaction mixture was stirred at room temperature for 45 minutes. Next, A solution of tert-butyl 3-oxopiperidine-1-carboxylate (2 g, 10.038 mmol) in tetrahydrofuran (20 ml) was slowly added dropwise to the above solution while maintaining internal temperature of the reaction solution at 20° C. After the addition, the reaction solution was stirred overnight at room temperature. As the LCMS shows that the reaction was completed, the reaction solution was added to ethyl acetate (50 ml) and water (50 ml) in batches. The aqueous phase was extracted with ethyl acetate (60 ml) for 3 times. The organic phases were combined, dried and filtered. The filtrate was concentrated to obtain a crude product, which was purified by column chromatography (ethyl acetate:petroleum ether=1:50˜1:10) to give tert-butyl 3-(4-fluorobenzylidene)piperidine-1-carboxylate as a yellow liquid (335 mg, Y: 10%). ES-API: [M+H]+=292.1.
Step 2: 72 mg of 10% Pd/C was added to a solution of tert-butyl 3-(4-fluorobenzylidene)piperidine-1-carboxylate (335 mg, 1.151 mmol) in ethanol (15 ml) under the protection of hydrogen gas. The reaction solution was stirred overnight at room temperature. The resultant mixture was filtered through celite, and concentrated to give a crude product of tert-butyl 3-(4-fluorobenzyl)piperidine-1-carboxylate (334 mg, Y: 73%). ES-API: [M+H]+=294.1.
Step 3: tert-Butyl 3-(4-fluorobenzyl)piperidine-1-carboxylate (334 mg, 1.140 mmol) was dissolved in 6 mL of 4N hydrogen chloride in dioxane. The reaction solution was stirred at room temperature for 2 hours, and then concentrated to give a crude product of 3-(4-fluorobenzyl)piperidine (220 mg, Y: 100%). ES-API: [M+H]+=194.1.
Step 4: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato) diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74), [1,1′-bis(diphenyl phosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 5: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (methanol:dichloromethane=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 6: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 7: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), 3-(4-fluorobenzyl)piperidine (51 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol), and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated to obtain a crude product, which was purified by alkaline HPLC to give (5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxypyrid-3-yl)(3-(4-fluorobenzyl)piperid-1-yl)methanone Z17 as an off-white powder (20.2 mg, Y: 16%). ES-API: [M+H]+=477.1. 1H NMR (400 MHz, DMSO-d6) δ 8.52-8.44 (m, 1H), 8.02-7.85 (m, 2H), 7.59-7.48 (m, 3H), 7.44-7.37 (m, 1H), 7.28-7.27 (m, 1H), 7.16-7.11 (m, 1H), 7.06-6.67 (m, 2H), 4.43-4.17 (m, 1H), 3.92-3.81 (m, 3H), 3.31-2.52 (m, 4H), 2.33-2.23 (m, 1H), 1.75-1.19 (m, 5H).
Step 8: The compound Z17 was separated by SFC (column type: OX—H 4.6*100 mm 5 μm; Co-solvent: ethanol (ammonia containing 1% methanol); column temperature: 40.5° C.; flow rate: 1.8 ml/min) to give the compound Z17-1 as a white powder (an arbitrarily assigned absolute configuration, peak 1, retention time: 2.36 min, 16.48 mg, Y: 16%). ES-API: [M+H]+=477.1. 1H NMR (400 MHz, DMSO-d6) δ 8.52-8.44 (m, 1H), 8.02-7.85 (m, 2H), 7.59-7.48 (m, 3H), 7.44-7.37 (m, 1H), 7.28-7.27 (m, 1H), 7.16-7.11 (m, 1H), 7.06-6.67 (m, 2H), 4.43-4.17 (m, 1H), 3.92-3.81 (m, 3H), 3.31-2.52 (m, 4H), 2.33-2.23 (m, 1H), 1.75-1.19 (m, 5H) and the compound Z17-2 (an arbitrarily assigned absolute configuration, peak 2, retention time: 3.84 min, 16.73 mg, Y: 40%), ES-API: [M+H]+=477.1.
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato) diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74), [1,1′-bis(diphenyl phosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (methanol:dichloromethane=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), (2-(cyclopentyloxy)-6-fluorophenyl)methylamine (56 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol), and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The concentrated organic phase was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopentyloxy)-6-(fluorobenzyl)-2-methoxynicotinamide Z18 as an off-white powder (13 mg, Y: 10%). ES-API: [M+H]+=493.2. 1H NMR (400 MHz, DMSO-d6) δ 8.60 (d, J=2.4 Hz, 1H), 8.37-8.34 (m, 2H), 8.01 (d, J=1.6 Hz, 1H), 7.58 (s, 2H), 7.51 (dd, J1=2.0 Hz, J2=8.4 Hz, 1H), 7.40 (d, J=8.4 Hz, 1H), 7.32-7.26 (m, 1H), 6.88 (d, J=9.2 Hz, 1H), 6.78 (t, J=8.8 Hz, 1H), 4.95-4.92 (s, 1H), 4.54 (d, J=5.2 Hz, 2H), 4.00 (s, 3H), 1.94-1.57 (m, 8H).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato) diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74), [1,1′-bis(diphenyl phosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (methanol:dichloromethane=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), (2-(cyclopentyloxy)-5-fluorophenyl)methylamine (56 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol), and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated to obtain crude product, which was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopentyloxy)-5-(fluorobenzyl)-2-methoxynicotinamide Z19 as an off-white powder (10.2 mg, Y: 8%). ES-API: [M+H]+=493.2. 1H NMR (400 MHz, DMSO-d6) δ 8.71 (t, J=5.6 Hz, 1H), 8.62 (d, J=2.8 Hz, 1H), 8.35 (d, J=2.4 Hz, 1H), 8.04 (d, J=2.0 Hz, 1H), 7.59 (s, 2H), 7.54 (dd, J1=2.0 Hz, J2=8.4 Hz, 1H), 7.41 (d, J=8.4 Hz, 1H), 7.09-6.98 (m, 3H), 4.89-4.86 (m, 1H), 4.43 (d, J=6.0 Hz, 2H), 4.03 (s, 3H), 1.91-1.59 (m, 8H).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato) diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74), [1,1′-bis(diphenyl phosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Methyl 5-bromo-2-methoxynicotinate (2.0 g, 8.13 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.37 g, 12.19 mmol), sodium carbonate (2.15 g, 20.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (663 mg, 0.813 mmol), dimethoxyethane (100 ml), and water (20 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 100 mL water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 100 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to column chromatography (methanol:dichloromethane=0˜10%) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (1.8 g, Y: 73%), ES-API: [M+H]+=316.1.
Step 3: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinate (800 mg, 2.54 mmol), lithium hydroxide monohydrate (533 mg, 12.7 mmol), tetrahydrofuran (10 ml), methanol (2 ml), and water (2 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 10 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1N diluted hydrochloric acid. The solvent was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (912 mg, Y: 100%), ES-API: [M+H]+=302.1.
Step 4: 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.266 mmol), (2-(cyclopropylmethoxy)phenyl)methylamine (47 mg, 0.266 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (176 mg, 0.399 mmol), triethylamine (80 mg, 0.798 mmol), and N,N-dimethylformamide (8 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopropylmethoxy)benzyl)-2-methoxynicotinamide Z20 as an off-white powder (13 mg, Y: 11%). ES-API: [M+H]+=461.2. 1H NMR (400 MHz, DMSO-d6) δ 8.68 (t, J=5.6 Hz, 1H), 8.62 (d, J=2.4 Hz, 1H), 8.39 (d, J=2.4 Hz, 1H), 8.04 (d, J=1.6 Hz, 1H), 7.62 (s, 2H), 7.54 (dd, J1=1.6 Hz, J2=8.0 Hz, 1H), 7.41 (d, J=8.0 Hz, 1H), 7.27-7.20 (m, 2H), 6.98 (d, J=7.6 Hz, 1H), 6.92 (t, J=7.6 Hz, 1H), 4.53 (d, J=6.0 Hz, 2H), 4.04 (s, 3H), 3.91 (d, J=6.8 Hz, 2H), 1.29-1.23 (m, 1H), 0.61-0.57 (m, 2H), 0.39-0.35 (m, 2H).
Step 1: Methyl 5-bromo-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate (150 mg, 0.61 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo [1,5-a]pyridine-2-amine (237 mg, 0.91 mmol), sodium carbonate (162 mg, 1.52 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (50 mg, 0.061 mmol), 1,4-dioxane (10 ml), and water (2 ml) were added to a 50 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 30 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and separated by thin layer chromatography (dichloromethane:methanol=15:1) to give methyl 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate (120 mg, Y: 66%), ES-API: [M+H]+=300.1.
Step 2: Methyl 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate (67 mg, 0.22 mmol), lithium hydroxide monohydrate (45 mg, 1.1 mmol), tetrahydrofuran (5 ml), methanol (1 ml), and water (1 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 5 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid dropwise. The resultant mixture was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (98 mg, Y: 100%). ES-API: [M+H]+=286.1.
Step 3: 5-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (98 mg, 0.34 mmol), 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (70 mg, 0.34 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (225 mg, 0.51 mmol), triethylamine (103 mg, 1.02 mmol), and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature until the reaction was completed. 50 mL of ethyl acetate was added to the reaction mixture. The resultant mixture was washed with 30 mL of water for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The obtained concentrate was separated by Prep-HPLC to give 5-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-6-oxo-N-(1-(2-(trifluoro methoxy)phenyl)ethyl)-1,6-dihydropyridine-3-carboxamide Z21 (9 mg, Y: 5.6%), ES-API: [M+H]+=473.2, 1H NMR (400 MHz, DMSO) δ 8.72 (d, J=7.1 Hz, 1H), 8.52 (d, J=7.1 Hz, 1H), 8.45 (s, 1H), 8.30 (s, 1H), 7.84 (s, 1H), 7.64-7.53 (m, 1H), 7.35 (d, J=9.3 Hz, 2H), 7.33-7.24 (m, 3H), 5.99 (s, 2H), 5.46-5.33 (m, 1H), 3.56 (s, 3H), 1.43 (d, J=7.1 Hz, 3H).
Step 1: Methyl 5-bromo-nicotinate (500 mg, 2.31 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (959 mg, 3.47 mmol), sodium carbonate (613 mg, 5.79 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (188 mg, 0.231 mmol), 1,4-dioxane (15 ml) and water (3 ml) were added to a 50 mL round-bottomed flask. The mixture was purged with nitrogen gas for three times. The reaction was carried out overnight at 80° C. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 30 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 30 mL ethyl acetate for 3 times. The organic phase was dried, concentrated, and separated by thin layer chromatography (dichloromethane:methanol=15:1) to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (356 mg, Y: 54%), ES-API: [M+H]+=286.1.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (300 mg, 1.05 mmol), lithium hydroxide monohydrate (215 mg, 5.25 mmol), tetrahydrofuran (5 ml), methanol (1 ml), and water (1 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 3 hours. After concentrating the solvent, 5 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid. The resultant mixture was concentrated. The concentrate was vacuum-dried to give a crude product of 5-(2-aminobenzo[d]thiazol-6-yl) nicotinic acid (361 mg, Y: 100%), ES-API: [M+H]+=272.2.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)nicotinic acid (152 mg, 0.56 mmol), (2-(cyclopropylmethoxy)phenyl)methylamine hydrochloride (100 mg, 0.56 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (351 mg, 0.84 mmol), triethylamine (170 mg, 1.68 mmol), and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature until the reaction was completed. 50 mL of ethyl acetate was added to the reaction mixture. The resultant mixture was washed with 30 mL of water for three times. The organic phases were combined, dried over anhydrous sodium sulfate, and concentrated. The obtained concentrate was separated by Prep-HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopropylmethoxy) benzyl) nicotinamide Z22 (10 mg, Y: 4.1%), ES-API: [M+H]+=431.2, 1H NMR (400 MHz, DMSO, ppm) δ 9.10-9.04 (m, 0H), 9.01-8.98 (m, 0H), 8.96-8.93 (m, 0H), 8.49 (s, OH), 8.12 (s, OH), 7.69-7.58 (m, 1H), 7.41 (d, J=8.3 Hz, 0H), 7.19 (dd, J=13.9, 7.1 Hz, 1H), 6.94 (d, J=8.4 Hz, 0H), 6.87 (t, J=7.2 Hz, 1H), 4.50 (d, J=5.7 Hz, 1H), 3.86 (d, J=6.8 Hz, 1H), 1.29-1.15 (m, 1H), 0.58-0.47 (m, 1H), 0.31 (d, J=4.6 Hz, 1H).
Step 1: Methyl 5-bromo-6-chloronicotinate (150 mg, 0.5988 mmol), lithium hydroxide monohydrate (239 mg, 5.988 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol and 5 mL of water were added to a 50 mL round-bottom flask. The mixture was stirred for reaction overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 8 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 50 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give a crude product of 5-bromo-6-chloronicotinic acid (201 mg, crude product). ES-API: [M+H]+=201.9.
Step 2: 5-Bromo-6-chloronicotinic acid (201 mg, 0.5988 mmol) and 20 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (3-(trifluoromethoxy)phenyl)methylamine (171.5 mg, 0.8982 mmol), triethylamine (605 mg, 5.988 mmol), and BOP reagent (397 mg, 0.8982 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 120 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (90 mL×5). The organic phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried, followed by PTLC [dichloromethane:methanol=10:1, v/v] to give 5-bromo-6-chloro-N-(3-(trifluoro methoxy)benzyl)nicotinamide (171 mg, Y: 70%), ES-API: M+H]+=409.2.
Step 3: 5-Bromo-6-chloro-N-(3-(trifluoromethoxy)benzyl)nicotinamide (171 mg, 0.4190 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (173 mg, 0.628 mmol) [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (20 mg, 0.02095 mmol), and sodium carbonate (133 mg, 1.257 mmol), and finally 15 mL of dioxane and 3 mL of water were added to a 20 mL microwave tube. The tube was purged with nitrogen gas for about 2 minutes. The reaction was carried out in an oil bath at 110° C. for 4 hours. After the reaction was cooled to room temperature, 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (30 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 5-(2-aminobenzo[d]thiazol-6-yl)-6-chloro-N-(3-(trifluoromethoxy)benzyl)nicotinamide Z23 (2.4 mg, Y: 1.2%). ES-API: [M+H]+=479.6. 1H NMR (400 MHz, DMSO-d6) δ 9.37 (t, J=5.9 Hz, 1H), 8.80 (d, J=2.3 Hz, 1H), 8.29 (d, J=2.3 Hz, 1H), 7.82 (d, J=1.5 Hz, 1H), 7.63 (s, 2H), 7.46-7.21 (m, 6H), 4.52 (d, J=5.7 Hz, 2H).
Step 1: A compound of methyl 6-bromo-4-indole-carboxylate (200 mg, 0.787 mmol) was charged into a microwave tube. 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridin-2-amine (406 mg, 1.57 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (64 mg, 0.0787 mmol), sodium carbonate (208 mg, 1.97 mmol), 3 mL of dioxane and 0.6 mL of water were added sequentially. The reaction was carried out in a microwave reactor at 80° C. for 30 minutes. After the mixture was cooled to room temperature, 15 mL of water was added to the mixture. The resultant mixture was extracted with 20 mL of ethyl acetate twice. The organic phases were combined, washed with 15 mL of saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to remove the solvent. The residue was purified by silica gel column chromatography (dichloromethane:methanol=100:1-10:1) to give methyl 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-indole-4-carboxylate (156 mg, Y: 65%). ES-API: [M+H]+=308.7.
Step 2: Methyl 6-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-indole-4-carboxylate (156 mg, 0.51 mmol) was added to a 50 ml round-bottomed flask. Lithium hydroxide (61 mg, 2.55 mmol), tetrahydrofuran (5 ml), methanol (2 ml), and water (2 ml) were added sequentially. The reaction was carried out at room temperature for 3 hours. The reaction was adjusted to pH=6 by adding 1M diluted hydrochloric acid. The solvent was concentrated to give the compound of 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-indole-4-carboxylic acid (150 mg, Y: 100%), which was used in the reaction of the next step directly. ES-API: [M+H]+=294.0.
Step 3: The compound of 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-indole-4-carboxylic acid (100 mg, 0.34 mmol) was add to a 50 ml round-bottomed flask. 1-(2-(trifluoromethoxy)phenyl)ethyl-1-amine (70 mg, 0.34 mmol), ((benzo-triazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (225 mg, 0.51 mmol), triethylamine (0.2 ml) and N,N-dimethylformamide (5 ml) were added sequentially. The mixture was reacted at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-indole-4-carboxamide (10 mg, Y: 6%). ES-API: [M+H]+=481.0.
The preparation method and experimental conditions were similar to those in Example 24. ES-API: [M+H]+=481.0.
Step 1: 10 mL of Anhydrous tetrahydrofuran, then methyl 3,4-diamino-5-bromobenzoate (280 mg, 1.1425 mmol) and triethoxymethane (345.0 mg, 2.3279 mmol), and finally methanesulfonic acid monohydrate (22.0 mg, 0.1156 mmol) were added to a 100 mL single-necked flask. The reaction was carried out overnight at room temperature. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 3 times (80 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate, and filtered. The filtrate was spin-dried to give a crude product of methyl 4-bromo-1H-benzo[d]imidazole-6-carboxylate (297 mg, crude product). ES-API: [M+H]+=257.0.
Step 2: Methyl 4-bromo-1H-benzo[d]imidazole-6-carboxylate (200 mg, 0.7842 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridin-2-amine (406.0 mg, 7.5614 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (140.0 mg, 0.1708 mmol) and sodium carbonate (250.0 mg, 2.360 mmol), and finally 20 mL of dioxane and 4 mL of water were added to a 100 mL single-neck flask. The mixture was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out in an oil bath at 110° C. for 5 hours. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and the concentrate was purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-6-carboxylate (233.0 mg, Y: 64%). ES-API: [M+H]+=309.0.
Step 3: Methyl 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-6-carboxylate (233.0 mg, 0.7565 mmol), lithium hydroxide monohydrate (605 mg, 15.13 mmol), 10 mL of tetrahydrofuran, 10 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 70 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-6-carboxylic acid (250 mg, crude product). ES-API: [M+H]+=295.0.
Step 4: 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-6-carboxylic acid (250 mg, 0.7565 mmol) and 10.0 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (232.0 mg, 1.1347 mmol), triethylamine (764.06 mg, 7.565 mmol), and BOP reagent (501.5 mg, 1.1347 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-benzo[d]imidazole-6-carboxamide (31 mg, Y: 8.3%). ES-API: [M+H]+=481.6. 1H NMR (400 MHz, DMSO-d6) δ 9.03 (d, J=7.4 Hz, 1H), 8.66 (d, J=7.0 Hz, 1H), 8.51 (s, 1H), 8.26 (s, 1H), 8.14 (d, J=9.7 Hz, 2H), 7.77-7.61 (m, 2H), 7.39-7.29 (m, 3H), 6.17 (s, 2H), 5.46 (dd, J=14.3, 7.1 Hz, 1H), 1.48 (d, J=7.0 Hz, 3H).
Step 1: 10 mL of anhydrous tetrahydrofuran, then methyl 2,3-diamino-5-bromobenzoate (280 mg, 1.1425 mmol) and triethoxymethane (345.0 mg, 2.3279 mmol), and finally methanesulfonic acid monohydrate (22.0 mg, 0.1156 mmol) were added to a 100 mL single-necked flask. The reaction was carried out overnight at room temperature. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 3 times (80 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate, and filtered. The filtrate was spin-dried to give a crude product of methyl 6-bromo-1H-benzo[d]imidazole-4-carboxylate (313 mg, crude product). ES-API: [M+H]+=257.0.
Step 2: Methyl 6-bromo-1H-benzo[d]imidazole-4-carboxylate (200 mg, 0.7842 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridin-2-amine (406.0 mg, 7.5614 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (140.0 mg, 0.1708 mmol) and sodium carbonate (250.0 mg, 2.360 mmol), and finally 20 mL of dioxane and 4 mL of water were added to a 100 mL single-neck flask. The mixture was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out in an oil bath at 110° C. for 5 hours. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and the concentrate was purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-4-carboxylate (97 mg, Y: 25%). ES-API: [M+H]+=309.0.
Step 3: Methyl 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-4-carboxylate (97.0 mg, 0.3149 mmol), lithium hydroxide monohydrate (63.0 mg, 1.5746 mmol), 3 mL of tetrahydrofuran, 3 mL of methanol, and 3 mL of water were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 70 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-4-carboxylic acid (103.0 mg, crude product). ES-API: [M+H]+=295.0.
Step 4: 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-benzo[d]imidazole-4-carboxylic acid (103.0 mg, 0.3149 mmol) and 10.0 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (97.0 mg, 0.4723 mmol), triethylamine (318.0 mg, 3.149 mmol), and BOP reagent (154.0 mg, 0.3480 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 6-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-benzo[d]imidazole-4-carboxamide (30.0 mg, Y: 20%). ES-API: [M+H]+=481.5. 1H NMR (400 MHz, DMSO-d6) δ 13.14 (s, 1H), 10.36 (s, 1H), 8.58 (d, J=6.8 Hz, 1H), 8.14 (s, 2H), 7.73-7.51 (m, 2H), 7.44-7.15 (m, 5H), 6.50 (d, J=62.6 Hz, 1H), 6.02 (s, 2H), 5.51 (t, J=7.0 Hz, 1H), 1.53 (d, J=7.0 Hz, 3H).
Step 1: 4-Bromo-1H-indazole-6-carboxylic acid (600 mg, 2.490 mmol) and 10 mL of N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (766 mg, 3.734 mmol), N,N-diisopropylethylamine (642 mg, 4.980 mmol), and O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (1135 mg, 2.988 mmol) were added sequentially. The reaction mixture was reacted at room temperature for 4 hours. After the reaction was completed, 20 mL of ethyl acetate was added to the reaction solution. The resultant mixture was washed with saturated brine (20 mL*3). The organic phase was dried, filtered, and concentrated under reduced pressure. The residue was purified by combiflash to give 4-bromo-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-indazole-6-carboxamide (320 mg, Y: 30%). ES-API: [M+H]+=428.1
Step 2: 4-bromo-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-indazole-6-carboxamide (50 mg, 0.117 mmol), 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-amine (61 mg, 0.234 mmol), sodium carbonate (31 mg, 0.293 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (4 mg, 0.00585 mmol), dioxane (5 mL), and water (1 mL) were added to a 50 mL single-necked flask. The reaction solution was heated to 110° C. under the protection of nitrogen gas and stirred for 2 hours. After the reaction was completed, the resultant mixture was cooled to room temperature and concentrated under reduced pressure. The residue was purified by alkaline HPLC to give 4-(2-amino-[1,2,4]triazole[1,5-a]pyridin-7-yl)-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1H-indazole-6-carboxamide (3.0 mg, Y: 5%) as an off-white solid. ES-API: [M+H]+=481.6. 1H NMR (400 MHz, CDCl3) δ 8.42 (d, J=6.4 Hz, 1H), 8.25 (s, 1H), 8.03 (s, 1H), 7.71 (s, 1H), 7.63 (s, 1H), 7.50-7.46 (m, 1H), 7.34-7.21 (m, 4H), 7.19-7.17 (m, 1H), 6.59 (s, 1H), 5.59-5.56 (m, 1H), 4.59 (s, 1H), 1.62-1.59 (m, 3H).
4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indole-6-carboxylic acid (60 mg, 0.195 mmol) 3-(4-fluorobenzyl)piperidine (38 mg, 0.195 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (129 mg, 0.293 mmol), triethylamine (59 mg, 0.585 mmol) and N,N-dimethylformamide (5 ml) were added into a 50 ml round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give (4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazol-6-yl)(3-(4-fluorobenzyl) piperidin-1-yl)methanone as an off-white powder (38.97 mg, Y: 44%). ES-API: [M+H]+=484.1. 1H NMR (400 MHz, DMSO-d6) δ 8.65 (d, J=7.2 Hz, 1H), 8.25 (s, 1H), 7.67-7.58 (m, 2H), 7.33-7.14 (m, 4H), 6.99-6.94 (m, 1H), 6.70-6.65 (m, 1H), 6.11 (s, 2H), 4.45-4.26 (m, 1H), 4.12 (s, 3H), 3.59-3.36 (m, 1H), 3.12-2.56 (m, 3H), 2.43-2.17 (m, 1H), 1.86-1.21 (m, 5H).
4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indole-6-carboxylic acid (60 mg, 0.195 mmol), (2-fluoro-5-(trifluoromethoxy)phenyl)methylamine (41 mg, 0.195 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (129 mg, 0.293 mmol), triethylamine (59 mg, 0.585 mmol) and N,N-dimethylformamide (5 ml) were added to a 50 ml round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(2-fluoro-5-(trifluoromethoxy) benzyl)-1-methyl-1H-indazole-6-carboxamide as an off-white powder (36.39 mg, Y: 38%). ES-API: [M+H]+=500.1. 1H NMR (400 MHz, DMSO-d6) δ 9.33 (t, J=5.6 Hz, 1H), 8.69 (d, J=6.8 Hz, 1H), 8.31 (s, 1H), 8.29 (s, 1H), 7.91 (d, J=1.2 Hz, 1H), 7.73 (d, J=1.2 Hz, 1H), 7.44-7.41 (m, 1H), 7.39-7.37 (m, 2H), 7.30 (dd, J1=1.6 Hz, J=6.8 Hz, 1H), 6.12 (s, 2H), 4.62 (d, J=5.6 Hz, 2H), 4.17 (s, 3H).
4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indole-6-carboxylic acid (60 mg, 0.195 mmol), (2-(cyclopentyloxy)-5-fluorophenyl)methylamine (41 mg, 0.195 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluoro-phosphate (129 mg, 0.293 mmol), triethylamine (59 mg, 0.585 mmol) and N,N-dimethylformamide (5 ml) were added to a 50 ml round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(2-(cyclopentyloxy)-5-fluorobenzyl)-1-methyl-1H-indazole-6-carboxamide as an off-white powder (32.6 mg, Y: 34%). ES-API: [M+H]+=500.2. 1H NMR (400 MHz, DMSO-d6) δ 9.08 (t, J=5.6 Hz, 1H), 8.69 (d, J=6.8 Hz, 1H), 8.31 (s, 1H), 8.30 (s, 1H), 7.93 (s, 1H), 7.75 (s, 1H), 7.31 (dd, J1=1.2 Hz, J2=6.4 Hz, 1H), 7.05-7.01 (m, 3H), 6.11 (s, 2H), 4.89-4.86 (m, 1H), 4.50 (d, J=5.2 Hz, 2H), 4.18 (s, 3H), 1.93-1.54 (m, 8H).
Compounds Z32 to Z35 were prepared according to the methods as described in the above Examples.
The preparation method was similar to Example 11. ES-API: [M+H]+=461.2. 1H NMR (400 MHz, DMSO-d6) δ 8.52 (t, J=8.2 Hz, 1H), 8.39 (dd, J=22.6, 2.6 Hz, 1H), 7.91 (dd, J=36.2, 2.5 Hz, 1H), 7.56 (d, J=10.7 Hz, 1H), 7.27-7.18 (m, 1H), 7.10 (dd, J=18.3, 9.5 Hz, 2H), 6.92 (d, J=69.9 Hz, 2H), 5.97 (d, J=5.2 Hz, 2H), 4.35-4.07 (m, 1H), 3.48 (d, J=31.5 Hz, 3H), 3.04 (d, J=62.9 Hz, 1H), 2.80-2.49 (m, 3H), 1.84-1.11 (m, 6H).
Step 1: Methyl 5-bromo-2-methoxy-6-methylnicotinate (400 mg, 1.538 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (510 mg, 1.8478 mmol), tetrakis(triphenylphosphine)palladium (100.0 mg, 0.0865 mmol) and sodium carbonate (500 mg, 4.717 mmol), and finally 40 mL of dimethoxyethane and 6 mL of water were added to a 100 mL single-neck flask. The mixture was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out in an oil bath at 105° C. for 5 hours. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and the concentrate was purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinate (545 mg, crude product). ES-API: [M+H]+=330.2.
Step 2: Methyl 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinate (545 mg, 1.538 mmol), lithium hydroxide monohydrate (323 mg, 7.690 mmol), 5 mL of tetrahydrofuran, 5 mL of methanol, and 5 mL of water were added to a 50 mL round-bottomed flask. The mixture was stirred for reaction overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 70 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (251 mg, Y: 52%). ES-API: [M+H]+=316.2.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (151 mg, 0.380 mmol) and 3.0 mL anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (116.8 mg, 0.570 mmol), triethylamine (384.0 mg, 3.80 mmol), and BOP reagent (252 mg, 0.570 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methyl-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (22.0 mg, Y: 9%). ES-API: [M+H]+=503. 1H NMR (400 MHz, DMSO-d6) δ 8.59 (d, J=7.7 Hz, 1H), 7.81 (s, 1H), 7.65 (d, J=1.6 Hz, 1H), 7.63-7.57 (m, 1H), 7.52 (s, 2H), 7.42-7.28 (m, 4H), 7.16 (dd, J=8.3, 1.7 Hz, 1H), 5.35 (p, J=7.0 Hz, 1H), 3.99 (s, 3H), 2.40 (s, 3H), 1.41 (d, J=7.0 Hz, 3H).
5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (60 mg, 0.1904 mmol) and 5.0 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-(cyclopropylmethoxy)-3,5-difluorophenyl)methylamine (48.7 mg, 0.2286 mmol), triethylamine (192 mg, 1.904 mmol), and BOP reagent (101 mg, 0.2286 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 6 times (30 mL×6). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopropylmethoxy)-3,5-difluorobenzyl)-2-methoxy-6-methylnicotinamide (6.3 mg, Y: 7.8%). ES-API: [M+H]+=511. 1H NMR (400 MHz, DMSO-d6) δ 8.74 (t, J=6.1 Hz, 1H), 7.93 (s, 1H), 7.66 (d, J=1.4 Hz, 1H), 7.50 (s, 2H), 7.35 (d, J=8.2 Hz, 1H), 7.23-7.10 (m, 2H), 6.91 (d, J=9.3 Hz, 1H), 4.55 (d, J=6.1 Hz, 2H), 4.00 (s, 3H), 3.84 (d, J=7.1 Hz, 2H), 2.41 (s, 3H), 1.20 (d, J=5.3 Hz, 1H), 0.55-0.49 (m, 2H), 0.30-0.22 (m, 2H).
Step 1: 9.0 mL of tetrahydrofuran/methanol/water (V:V:V=1:1:1) was added to a 50 mL single-necked round-bottomed flask. Next, methyl 5-bromo-1,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylate (100 mg, 0.3846 mmol) was added. Finally, lithium hydroxide monohydrate (81 mg, 1.923 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. After the reaction was completed, the reaction mixture was spin-dried under reduced pressure to remove the solvent. 10 mL of water was added to the system. The system was adjusted to pH 5˜6 with a solution of hydrogen chloride solution (4M). The resultant mixture was spin-dried under reduced pressure to remove the solvent, to give the target compound of 5-bromo-1,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid as a crude product (50 mg, Y: 53%). ES-API: [M+H]+=246.0.
Step 2: 5 mL of N,N-dimethylformamide/triethylamine (V:V=9:1) was added to a 50 mL single-necked round-bottomed flask. Next, 5-bromo-1,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid (60 mg, 0.2597 mmol) and 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (63 mg, 0.3061 mmol) was added. Finally, BOP reagent (136 mg, 0.3061 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 5 times (60 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified on silica gel using automatic flash chromatography (ethyl acetate/petroleum ether=0-50%). The resultant solution was spin-dried under reduced pressure to remove the solvent, to give the target compound of 5-bromo-1,6-dimethyl-2-oxo-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1,2-dihydro pyridine-3-carboxamide (90 mg, Y: 88%). ES-API: [M+H]+=435.1.
Step 3: 20.0 mL of dioxane and 6.0 mL of water were added to a 100 mL single-necked flask under the protection of nitrogen gas. Next, 5-bromo-1,6-dimethyl-2-oxo-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1,2-dihydropyridine-3-carboxamide (70.0 mg, 0.21428 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-amine (47 mg, 0.1713 mmol), sodium carbonate (45.4 mg, 0.4284 mmol) and tetrakis(triphenylphosphine) palladium (10 mg, 0.007 mmol) were added. The mixture was nitrogen-purged for three times. The reaction was carried out in an oil bath at 110° C. for 4 hours. After the reaction was completed, 60 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (80 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The crude product of the target compound obtained by spin-drying the was purified by pre-HPLC to give the target compound of 5-(2-aminobenzo[d]thiazol-6-yl)-1,6-dimethyl-2-oxo-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)-1,2-dihydropyridine-3-carboxamide (6.4 mg, Y: 6.2%). ES-API: [M+H]+=503.3. 1H NMR (400 MHz, DMSO-d6) δ 10.35 (d, J=7.6 Hz, 1H), 8.09 (s, 1H), 7.61-7.48 (m, 4H), 7.42-7.29 (m, 4H), 7.08 (dd, J=8.2, 1.8 Hz, 1H), 5.35 (p, J=6.9 Hz, 1H), 3.62 (s, 3H), 2.39 (s, 3H), 1.43 (d, J=6.9 Hz, 3H).
Step 1: 50 mL of anhydrous toluene was added to a 100 mL three-necked round-bottomed flask at room temperature under the protection of nitrogen gas. Next, 2-hydroxybenzonitrile (2.0 g, 16.80 mmol) and tetrahydrofuran-3-ol (2.22 g, 25.22 mmol) were added. Finally, triphenyl phosphate (5.72 g, 21.81 mmol) was added. The reaction was carried out at room temperature for 5 minutes. Thereafter, diisopropyl azodicarboxylate (4.65 mL, 23.01 mmol) was added. The reaction was carried out at room temperature for another 12 hours. After the reaction was completed, 80 mL of dichloromethane was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried and purified by PTLC [petroleum ether:ethyl acetate=100:0˜85:15, v/v] to give the target compound of 2-((tetrahydrofuran-3-yl)oxy)benzonitrile (4.4 g, crude product). ES-API: [M+H]+=190.1.
Step 2: 20 mL of tetrahydrofuran and 2-((tetrahydrofuran-3-yl)oxy)benzonitrile (1.4 g, 4.2 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (20 mL, 1M, 20.0 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (2-((tetrahydrofuran-3-yl)oxy)phenyl)methylamine (76 mg, Y: 10%). ES-API: [M+H]+=194.3.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (109 mg, 0.3460 mmol) and 3.0 mL of anyhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-((tetrahydrofuran-3-yl)oxy)phenyl)methylamine (76.0 mg, 0.3937 mmol), triethylamine (350 mg, 3.460 mmol), and BOP reagent (184 mg, 0.4163 mmol) were added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methyl-N-(2-((tetrahydrofuran-3-yl)oxy)benzyl)nicotinamide (7.5 mg, Y: 8%). ES-API: [M+H]+=491.5. 1H NMR (400 MHz, DMSO-d6) δ 8.68 (t, J=5.9 Hz, 1H), 8.58 (d, J=2.6 Hz, 1H), 8.33 (d, J=2.6 Hz, 1H), 8.07-7.94 (m, 2H), 7.51 (dt, J=8.4, 4.8 Hz, 4H), 7.37 (d, J=8.3 Hz, 1H), 6.90 (dd, J=7.2, 5.0 Hz, 1H), 5.43 (dd, J=6.9, 4.5 Hz, 1H), 4.38 (d, J=5.9 Hz, 2H), 4.00 (s, 3H), 2.04 (s, 1H), 1.98-1.83 (m, 2H), 1.78-1.66 (m, 4H), 1.57 (dd, J=13.0, 6.4 Hz, 2H).
Step 1: 50 mL of anhydrous N,N-dimethylformamide and cyclopentanol (1.40 g, 16.25 mmol) were added to a 100 mL three-necked round-bottomed flask at 0° C. under the protection of nitrogen gas. Next, sodium hydride (409 mg, 10.23 mmol) was added. Finally, 2-fluoronicotinonitrile (1.0 g, 8.190 mmol) was added. The resultant mixture was slowly warmed up to 55° C., and the reaction was carried out for 12 hours. After the reaction was completed, the reaction system was cooled to 0° C., and 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 2-(cyclopentyloxy)nicotinonitrile (2.0 g, crude product). ES-API: [M+H]+=189.1.
Step 2: 20 mL of tetrahydrofuran and 2-(cyclopentyloxy)nicotinonitrile (1.0 g, 4.1 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (20 mL, 1M, 20.0 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (2-(cyclopentyloxy)pyridin-3-yl)methylamine (130 mg, Y: 16.5%). ES-API: [M+H]+=193.4.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (66 mg, 0.2095 mmol) and 3.0 mL of anyhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, ((2-(cyclopentyloxy)pyridin-3-yl)methylamine (40.0 mg, 0.2083 mmol), triethylamine (211 mg, 2.095 mmol), and BOP reagent (110 mg, 0.2488 mmol) were added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 6 times (30 mL×6). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-((2-(cyclopentyloxy)pyridin-3-yl)methyl)-2-methoxy-6-methylnicotinamide (18 mg, Y: 22.5%). ES-API: [M+H]+=490.5. 1H NMR (400 MHz, DMSO-d6) δ 8.58 (t, J=6.0 Hz, 1H), 8.01 (dd, J=5.0, 1.7 Hz, 1H), 7.96 (s, 1H), 7.66 (d, J=1.7 Hz, 1H), 7.51 (d, J=7.0 Hz, 3H), 7.35 (d, J=8.2 Hz, 1H), 7.17 (dd, J=8.2, 1.8 Hz, 1H), 6.88 (dd, J=7.2, 5.0 Hz, 1H), 5.42 (dd, J=6.9, 4.4 Hz, 1H), 4.36 (d, J=5.9 Hz, 2H), 3.99 (s, 3H), 2.41 (s, 3H), 1.97-1.84 (m, 2H), 1.71 (d, J=4.7 Hz, 4H), 1.61-1.52 (m, 2H).
Step 1: 20 mL of Acetone was added to a 100 mL three-necked round-bottomed flask at room temperature under the protection of nitrogen gas. Next, 2-hydroxybenzonitrile (0.77 g, 6.458 mmol) and 2-iodopropane (2.0 g, 11.76 mmol) were added. Finally, cesium carbonate (4.2 g, 13.0 mmol) was added. The resultant mixture was heated to 60° C., and the reaction was carried out for 45 minutes. After the reaction was completed, 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 2-isopropylbenzonitrile (1.0 g, crude product).
Step 2: 30 mL of tetrahydrofuran and 2-isopropylbenzonitrile (1.0 g, 6.211 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (30 mL, 1M, 30.0 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (2-isopropoxyphenyl) methylamine (150 mg, Y: 15%). ES-API: [M+H]+=166.2.
Step 3: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxy-6-methylnicotinic acid (62 mg, 0.1968 mmol) and 3.0 mL of anyhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, (2-isopropoxyphenyl) methylamine (49.0 mg, 0.2969 mmol), triethylamine (200 mg, 1.968 mmol), and BOP reagent (125 mg, 0.2829 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-isopropoxybenzyl)-2-methoxy-6-methylnicotinamide (10.7 mg, Y: 16.8%). ES-API: [M+H]+=463.3. 1H NMR (400 MHz, DMSO-d6) δ 8.52 (t, J=6.0 Hz, 1H), 7.98 (s, 1H), 7.66 (d, J=1.6 Hz, 1H), 7.53 (s, 2H), 7.35 (d, J=8.2 Hz, 1H), 7.17 (dd, J=12.0, 4.1 Hz, 3H), 7.03-6.94 (m, 1H), 6.84 (t, J=7.3 Hz, 1H), 4.64 (dt, J=12.1, 6.1 Hz, 1H), 4.42 (d, J=6.1 Hz, 2H), 4.00 (s, 3H), 2.41 (s, 3H), 1.28 (d, J=6.0 Hz, 6H).
Step 1: 20 mL of anhydrous tetrahydrofuran, and then 2-fluoro-5-(trifluoro methoxy)benzonitrile (0.50 g, 2.475 mmol) and methyllithium (2.96 mL, 4.950 mmol) were added to a 100 mL three-necked round-bottomed flask at −78° C. under the protection of nitrogen gas. The reaction was carried out at this temperature for 2 hours. Thereafter, sodium borohydride (188 mg, 4.950 mmol) was added. The mixture was slowly warmed up to 0° C., and the reaction was carried out for another 2 hours. After the reaction was completed, 50 mL of 1M hydrochloric acid solution was added to the system. The resultant mixture was spin-dried under reduced pressure and purified by PTLC [dichloromethane:methanol=10:1, v/v] to give the target compound of 1-(2-fluoro-5-(trifluoromethoxy)phenyl)ethan-1-amine (168 mg, Y: 30%). ES-API: [M+H]+=224.0.
Step 2: 5-(2-Aminobenzo[d]thiazol-6-yl)-2-methylnicotinic acid (50.0 mg, 0.1754 mmol) and 4.0 mL of anyhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-fluoro-5-(trifluoromethoxy)phenyl)ethan-1-amine (58.7 mg, 0.2637 mmol), triethylamine (177 mg, 1.754 mmol), and BOP reagent (116.3 mg, 0.2637 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(2-fluoro-5-(trifluoromethoxy)phenyl)ethyl)-2-methylnicotinamide (12.2 mg, Y: 14.0%). ES-API: [M+H]+=491.3. 1H NMR (400 MHz, DMSO-d6) δ 9.06 (d, J=7.7 Hz, 1H), 8.80 (d, J=2.3 Hz, 1H), 8.06 (d, J=1.8 Hz, 1H), 7.95 (d, J=2.3 Hz, 1H), 7.67-7.54 (m, 3H), 7.45 (d, J=3.5 Hz, 1H), 7.44-7.28 (m, 3H), 5.31 (dd, J=14.5, 7.2 Hz, 1H), 2.42 (s, 3H), 1.43 (d, J=7.0 Hz, 3H).
Step 1: Methyl 6-amino-5-bromonicotinate (200 mg, 0.8656 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (270 mg, 0.9783 mmol), tetrakis(triphenylphosphine) palladium (60 mg, 0.052 mmol), and sodium carbonate (200 mg, 1.886 mmol), and finally 20 mL of dimethoxyethane and 4 mL of water were added to a 100 mL single-necked flask. The mixture was purged with nitrogen gas for about 1.5 minutes. The reaction was carried out in an oil bath at 105° C. for 5 hours. 100 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 5 times (80 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and the concentrate was purified by PTLC [dichloromethane:methanol=10:1, v/v] to give methyl 6-amino-5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (120 mg, Y: 46%). ES-API: [M+H]+=301.
Step 2: Methyl 6-amino-5-(2-aminobenzo[d]thiazol-6-yl)nicotinate (120 mg, 0.400 mmol), lithium hydroxide monohydrate (80 mg, 2.000 mmol), 3 mL of tetrahydrofuran, 3 mL of methanol and 3 mL of water were added to a 50 mL round-bottomed flask. The reaction was carried out overnight at room temperature. As monitored by TLC [dichloromethane:methanol=10:1, v/v] when the spot for the starting materials disappeared, the reaction was terminated. The reaction system was spin-dried under reduced pressure; thereafter, 10 mL of water was added. The reaction system was cooled to 0° C. in an ice-water bath. Hydrogen chloride solution (4M in dioxane) was added dropwise to adjust the pH to 5-6. 70 ml of toluene was added. The resultant mixture was spin-dried under reduced pressure, to give 6-amino-5-(2-aminobenzo[d]thiazol-6-yl) nicotinic acid (132 mg, crude product). ES-API: [M+H]+=287.
Step 3: 6-amino-5-(2-aminobenzo[d]thiazol-6-yl) nicotinic acid (66 mg, 0.2000 mmol) and 4.0 mL of anhydrous N,N-dimethylformamide were added to a 50 mL round-bottomed flask. Next, 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (61.5 mg, 0.3000 mmol), triethylamine (202.0 mg, 2.000 mmol) and BOP reagent (133.0 mg, 0.3000 mmol) were added sequentially. The reaction was carried out at room temperature under the protection of nitrogen gas for 12 hours. 50 mL of ethyl acetate was added to the system. The resultant mixture was washed with saturated brine for 4 times (30 mL×4). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered, and the filtrate was spin-dried to give 6-amino-5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(2-(trifluoromethoxy)phenyl)ethyl)nicotinamide (23.0 mg, Y: 25.3%). ES-API: [M+H]+=474.0. 1H NMR (400 MHz, DMSO-d6) δ 8.58 (d, J=7.5 Hz, 1H), 8.44 (d, J=2.3 Hz, 1H), 7.83 (d, J=2.3 Hz, 1H), 7.70 (d, J=1.6 Hz, 1H), 7.63-7.48 (m, 3H), 7.43-7.22 (m, 5H), 6.17 (s, 2H), 5.38 (p, J=7.0 Hz, 1H), 1.38 (d, J=7.0 Hz, 3H).
Step 1: 2-Amino-6-bromobenzothiazole (3.0 g, 13.1 mmol), bis(pinacolato)diboron (6.65 g, 26.2 mmol), potassium acetate (3.21 g, 32.74 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (1 g, 1.31 mmol), and 1,4-dioxane (60 ml) were added to a 250 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 100° C. for 8 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. The filtrate obtained by washing the filter cake with ethyl acetate for three times was concentrated to give a crude product of 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (3.8 g, Y: 100%). ES-API: [M+H]+=277.2.
Step 2: Ethyl 2-amino-5-bromonicotinate (300 mg, 1.230 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzothiazol-2-amine (408 mg, 1.475 mmol), sodium carbonate (260 mg, 2.460 mmol), tetrakis(triphenylphosphine)palladium (72 mg, 0.0615 mmol), dimethoxyethane (10 ml), and water (2 ml) were added to a 50 mL round-bottomed flask. The mixture was nitrogen-purged for three times. The reaction was carried out at 105° C. for 3 hours. Then, the reaction mixture was cooled to room temperature, and was suction filtered. 50 mL of water was added to a filtrate obtained by washing the filter cake with ethyl acetate for three times. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phase was dried, concentrated, and subjected to thin layer chromatography (methanol/dichloromethane=0˜10%) to give ethyl 2-amino-5-(2-aminobenzo[d]thiazol-6-yl) nicotinate (255 mg, Y: 66%). ES-API: [M+H]+=315.1.
Step 3: Ethyl 2-amino-5-(2-aminobenzo[d]thiazol-6-yl) nicotinate (200 mg, 0.636 mmol), lithium hydroxide monohydrate (134 mg, 3.181 mmol), tetrahydrofuran (5 ml), methanol (5 ml) and water (5 ml) were added to a 100 mL round-bottomed flask. The reaction was carried out overnight at room temperature. After concentrating the solvent, 10 ml of water was added to the flask. Next, the reaction was adjusted to pH=5 by adding 1M diluted hydrochloric acid. The resultant mixture was concentrated. The concentrate was vacuum-dried to give a crude product of 2-amino-5-(2-aminobenzo[d]thiazol-6-yl)nicotinic acid (182 mg, Y: 99%), ES-API: [M+H]+=287.1.
Step 4: 2-amino-5-(2-aminobenzo[d]thiazol-6-yl)nicotinic acid (50 mg, 0.175 mmol), 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (36 mg, 0.175 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (116 mg, 0.263 mmol), triethylamine (53 mg, 0.252 mmol) and N,N-dimethylformamide (5 mL) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 2-amino-5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(2-(trifluoro methoxy)phenyl)ethyl)nicotinamide as an off-white powder (34.05 mg, Y: 42%). ES-API: [M+H]+=474.0. 1H NMR (400 MHz, DMSO-d6) δ 8.94 (d, J=7.2 Hz, 1H), 8.42 (d, J=2.4 Hz, 1H), 8.31 (d, J=2.0 Hz, 1H), 7.99 (d, J=1.6 Hz, 1H), 7.65-7.62 (m, 1H), 7.56-7.52 (m, 3H), 7.42-7.34 (m, 4H), 7.05 (s, 2H), 5.45-5.41 (m, 1H), 1.48 (d, J=7.2 Hz, 3H).
The compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(2-(tris(trifluoromethoxy)phenyl)ethyl)-1H-indazole-6-carboxamide (18 mg, 0.37 mmol) and triethylamine (0.1 ml) was dissolved in dichloromethane (5 ml). Cyclopropylformal chloride (4 mg, 0.041 mmol) was added dropwise in an ice-water bath. The reaction was carried out in an ice-water bath for 5 minutes. 10 ml of water was added to the mixture. The resultant mixture was extracted with 10 ml of dichloromethane twice. The organic phases were combined, washed with 15 ml of saturated saline, dried over anhydrous sodium sulfate, and concentrated to remove the solvent. The crude product was purified by alkaline HPLC to give the compound of 4-(2-(cyclopropylformamido)-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(2-(trifluoro methoxy)phenyl)ethyl)-1H-indazole-6-carboxamide (1.2 mg, Y: 5.9%). ES-API: [M+H]+=550.7.
The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (50 mg, 0.166 mmol) was added to a 50 ml round-bottomed flask. 1-(2-fluoro-6-(trifluoromethoxy)phenyl)ethan-1-amine (37 mg, 0.166 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (105 mg, 0.249 mmol), triethylamine (0.1 ml) and N,N-dimethylformamide (5 mL) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added to the reaction mixture. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(2-fluoro-6-(trifluoromethoxy)phenyl)ethyl)-2-methoxynicotinamide (11 mg, Y: 13%). ES-API: [M+H]±=507.0. 1H NMR (400 MHz, DMSO), δ 8.83 (d, J=7.8 Hz, 1H), 8.56 (d, J=2.6 Hz, 1H), 8.13 (d, J=2.6 Hz, 1H), 7.99 (d, J=2.0 Hz, 1H), 7.58-7.47 (m, 4H), 7.35 (dd, J=12.0, 8.6 Hz, 3H), 5.38-5.25 (m, 1H), 3.97 (s, 3H), 1.43 (d, J=8.0 Hz, 3H).
Step 1: A compound of 3,5-difluoro-2-hydroxybenzonitrile (100 mg, 0.645 mmol) was added to a 50 ml round-bottomed flask. Next, triphenylphosphine (57 mg, 0.774 mmol), diisopropyl azodicarboxylate (253 mg, 0.97 mmol) and tetrahydrofuran (10 ml) were added sequentially. Thereafter, the reaction was carried out overnight at room temperature under the protection of nitrogen gas. 15 mL water was added to the mixture. The resultant mixture was extracted with 30 mL of ethyl acetate twice. The organic phases were combined, washed with 15 mL of saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to remove the solvent. The residue was purified on silica gel by column chromatography (petroleum ether:ethyl acetate=100:1-20:1) to give the product of 3,5-difluoro-2-isobutoxybenzonitrile (101 mg, Y: 74%). ES-API: [M+H]+=212.0.
Step 2: The compound of 3,5-difluoro-2-isobutoxybenzonitrile (101 mg, 0.48 mmol) was dissolved in tetrahydrofuran (5 ml). Next, a solution of borane in tetrahydrofuran (2.4 ml, 2.4 mmol) was added under the protection of nitrogen gas. The reaction was carried out overnight at 80° C. After the reaction system was cooled to room temperature, 0.5 ml of methanol was added in an ice-water bath to quench the reaction. Thereafter, 15 mL of water was added to the mixture. The resultant mixture was extracted with 30 mL of ethyl acetate twice. The organic phases were combined, washed with 30 ml of saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to remove the solvent. The residue was purified on silica gel by column chromatography (dichloromethane:methanol=100:1-20:1) to give the product of (3,5-difluoro-2-isobutoxyphenyl)methylamine (50 mg, Y: 48%). ES-API: [M+H]+=216.2.
Step 3: The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (47 mg, 0.155 mmol) was added to a 50 ml round-bottomed flask. (3,5-difluoro-2-isobutoxyphenyl)methylamine (50 mg, 0.232 mmol), ((benzo-triazol-1-yl)oxy) tris(dimethylamino)phosphonium hexafluorophosphate (98 mg, 0.232 mmol), triethylamine (0.1 ml) and N,N-dimethylformamide (5 ml) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-aminobenzo[d]thiazol-6-yl)-N-(3,5-difluoro-2-isobutoxybenzyl)-2-methoxynicotinamide (22 mg, Y: 29%). ES-API: [M+H]+=499.1. 1H NMR (400 MHz, DMSO), δ 8.88 (s, 1H), 8.62 (d, J=2.6 Hz, 1H), 8.35 (d, J=2.6 Hz, 1H), 8.05 (s, 1H), 7.63 (s, 1H), 7.55 (d, J=8.2 Hz, 1H), 7.42 (s, 1H), 7.24 (s, 1H), 7.00 (d, J=9.6 Hz, 1H), 4.57 (d, J=6.0 Hz, 2H), 4.03 (s, 3H), 3.82 (d, J=6.0 Hz, 2H), 2.17-1.94 (m, 1H), 1.03 (d, J=6.8 Hz, 6H).
The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (50 mg, 0.166 mmol) was added to a 50 ml round-bottomed flask. (2-isopropoxyphenyl)methylamine (27 mg, 0.166 mmol), ((benzo-triazol-1-yl)oxy) tris(dimethylamino)phosphonium hexafluorophosphate (105 mg, 0.249 mmol), triethylamine (0.1 ml) and N,N-dimethylformamide (5 ml) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-isopropoxybenzyl)-2-methoxynicotinamide (10 mg, Y: 13%). ES-API: [M+H]+=499.2. 1H NMR (400 MHz, DMSO), δ 8.57 (d, J=2.4 Hz, 2H), 8.35 (d, J=2.6 Hz, 1H), 7.99 (s, 1H), 7.55 (s, 2H), 7.51-7.44 (m, 1H), 7.38 (s, 1H), 7.20 (dd, J=17.8, 7.6 Hz, 2H), 6.98 (d, J=8.0 Hz, 1H), 6.86 (t, J=7.4 Hz, 1H), 4.64 (dt, J=11.8, 5.8 Hz, 1H), 4.44 (d, J=6.0 Hz, 2H), 4.00 (s, 3H), 1.28 (d, J=6.0 Hz, 6H).
The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (50 mg, 0.166 mmol) was added to a 50 ml round-bottomed flask. (2-(cyclopentylmethoxy)-6-fluorophenyl)methylamine (37 mg, 0.166 mmol), ((benzo-triazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (105 mg, 0.249 mmol), triethylamine (0.1 ml) and N,N-dimethylformamide (5 ml) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-aminobenzo[d]thiazol-6-yl)-N-(2-(cyclopentylmethoxy)-6-fluorobenzyl)-2-methoxynicotinamide. (9 mg, Y: 11%). ES-API: [M+H]+=507.4. 1H NMR (400 MHz, DMSO), δ 8.55 (d, J=2.5 Hz, 1H), 8.32 (d, J=2.5 Hz, 2H), 7.97 (s, 1H), 7.54 (s, 2H), 7.48 (d, J=8.4 Hz, 1H), 7.37 (s, 1H), 7.26 (dd, J=15.6, 8.0 Hz, 1H), 6.86 (d, J=8.2 Hz, 1H), 6.77 (t, J=8.8 Hz, 1H), 4.54 (d, J=5.2 Hz, 2H), 3.95 (s, 3H), 3.92 (d, J=7.0 Hz, 2H), 2.30 (d, J=4.8 Hz, 1H), 1.77 (d, J=7.4 Hz, 2H), 1.63-1.44 (m, 5H), 1.34 (dd, J=12.0, 8.0 Hz, 2H).
The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (50 mg, 0.166 mmol) was added to a 50 ml round-bottomed flask. (2-(cyclopentyloxy)pyridin-3-yl)methylamine (32 mg, 0.166 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (105 mg, 0.249 mmol), triethylamine (0.1 ml), and N,N-dimethylformamide (5 ml) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-((2-(cyclopentyloxy)pyridin-3-yl)methyl)-2-methoxynicotinamide (18 mg, Y: 23%). ES-API: [M+H]+=476.4. 1H NMR (400 MHz, DMSO), δ 8.68 (s, 1H), 8.58 (d, J=2.6 Hz, 1H), 8.33 (d, J=2.6 Hz, 1H), 8.04-7.97 (m, 2H), 7.55 (d, J=7.8 Hz, 3H), 7.50 (dd, J=8.4, 2.0 Hz, 1H), 7.37 (d, J=8.4 Hz, 1H), 6.90 (dd, J=7.2, 5.0 Hz, 1H), 5.43 (s, 1H), 4.38 (d, J=6.0 Hz, 2H), 4.00 (s, 3H), 2.04 (s, 1H), 1.90 (d, J=4.0 Hz, 2H), 1.79-1.65 (m, 4H), 1.57 (s, 2H).
The compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (50 mg, 0.166 mmol) was added to a 50 ml round-bottomed flask. (2-((tetrahydrofuran-3-yl)oxy)phenyl)methylamine (37 mg, 0.166 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (105 mg, 0.249 mmol), triethylamine (0.1 ml), and N,N-dimethylformamide (5 ml) were added sequentially. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-aminobenzo[d]thiazol-6-yl)-2-methoxy-N-(2-((tetrahydrofuran-3-yl)oxy)benzyl)nicotinamide (11 mg, Y: 14%). ES-API: [M+H]+=477.6. 1H NMR (400 MHz, DMSO), δ 8.57 (d, J=2.6 Hz, 2H), 8.34 (d, J=2.6 Hz, 1H), 8.03 (s, 1H), 7.82 (s, 2H), 7.53 (d, J=8.4 Hz, 1H), 7.39 (d, J=8.4 Hz, 1H), 7.22 (dd, J=18.0, 7.6 Hz, 2H), 6.96 (d, J=8.0 Hz, 1H), 6.90 (t, J=7.0 Hz, 1H), 5.07 (s, 1H), 4.44 (d, J=6.0 Hz, 2H), 3.92 (dd, J=10.0, 4.6 Hz, 1H), 3.84 (dd, J=15.0, 8.0 Hz, 2H), 3.76 (td, J=8.0, 4.0 Hz, 2H), 2.20 (dt, J=14.0, 7.0 Hz, 1H), 2.07-1.91 (m, 1H), 1.20 (s, 2H).
Step 1: Methyl 5-bromo-2-chloronicotinate (10 g, 39.923 mmol), potassium vinyltrifluoroborate (5.348 g, 39.923 mmol), triethylamine (5.56 mL, 39.923 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (585 mg, 0.798 mmol) was dissolved in 200 mL of EtOH under the protection of nitrogen gas. The mixture was purged with nitrogen gas for three times. The reaction was carried out at 80° C. for 1 hour. Then, the reaction mixture was cooled to room temperature, and was filtered. The filtrate was spin-dried. The residue was dissolved in 300 mL of ethyl acetate and 300 mL of water, then separated, and the organic phase was concentrated. The resultant residue was purified on silicon gel by automatic flash chromatography (ethyl acetate/petroleum ether=0-20%) to give the compound of methyl 5-bromo-2-vinylnicotinate (5.186 g, Y: 54%). ES-API: [M+H]+=242.1.
Step 2: Methyl 5-bromo-2-vinylnicotinate (780 mg, 3.222 mmol) and 1-(2-(trifluoromethoxy)phenyl)ethan-1-amine (1.653 g, 8.055 mmol) were mixed in DMA (10 mL) in a microwave bottle. The reaction was irradiated with microwave at 150° C. for 8 hours. The reaction was cooled to room temperature. 50 mL of ethyl acetate was added to the reaction solution. The resultant mixture was washed with water (25 mL*3) and saturated saline (25 mL*3). The organic layers were combined and concentrated. The concentrate was purified on silicon gel by automatic flash chromatography to give the compound of 3-bromo-6-(1-(2-(trifluoromethoxy) phenyl)ethyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (769 mg, Y: 57%). ES-API: [M+H]+=415.0.
Step 3: 3-bromo-6-(1-(2-(trifluoromethoxy)phenyl)ethyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (50 mg, 0.120 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole-2-amine (67 mg, 0.240 mmol), sodium carbonate (38 mg, 0.360 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (5 mg, 0.006 mmol) was dissolved in 5 mL of dioxane and 1 mL of CH2O under the protection of nitrogen gas. The mixture was purged with nitrogen gas for three times. The reaction was carried out at 95° C. for 3 hours. The reaction was cooled to room temperature. 20 mL of EtOAc was added to the reaction solution. The resultant mixture was washed with water (15 mL*3) and saturated saline (15 mL*3). The organic layers were combined and concentrated. The residue was purified by alkaline HPLC to give a white compound of 3-(2-aminobenzo[d]thiazol-6-yl)-6-(1-(2-(trifluoromethoxy)phenyl)ethyl)-7,8-dihydro-1,6-naphthyridinyl-5(6H)-one (25.67 mg, Y: 44%). ES-API: [M+H]+=485.0. 1H NMR (400 MHz, DMSO-d6) δ 8.85 (d, J=1.6 Hz, 1H), 8.33 (d, J=2.4 Hz, 1H), 8.05 (d, J=1.2 Hz, 1H), 7.64 (dd, J1=1.6 Hz, J2=6.0 Hz, 1H), 7.55-7.51 (m, 3H), 7.45-7.30 (m, 4H), 6.12-6.08 (m, 1H), 3.53-3.47 (m, 1H), 3.08-2.96 (m, 2H), 2.87-2.81 (m, 1H), 1.50 (d, J=5.6 Hz, 3H).
Step 4: The compound of 3-(2-aminobenzo[d]thiazol-6-yl)-6-(1-(2-(trifluoromethoxy)phenyl)ethyl)-7,8-dihydro-1,6-naphthyridinyl-5 (6H)-one was separated by SFC chiral resolution (Co-solvent: methanol (ammonia containing 0.2% methanol); column type: AD-H (4.6*100 mm*5 um)) to give the compound Z54-1 (peak 1, retention time: 1.25 min): (S)-3-(2-aminobenzo[d]thiazol-6-yl)-6-(1-(2-(trifluoromethoxy)phenyl)ethyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (an arbitrarily assigned absolute configuration, 10.62 mg, Y: 41%), ES-API: [M+H]+=485.1, and the compound Z54-2 (peak 2, retention time: 1.67 min): (R)-3-(2-aminobenzo[d]thiazol-6-yl)-6-(1-(2-(trifluoromethoxy)phenyl)ethyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (an arbitrarily assigned absolute configuration, 9.50 mg, Y: 37%), ES-API: [M+H]+=485.1.
Step 1: Methyl 5-bromo-2-vinyl nicotinate (2.5 g, 10.328 mmol) and (2-fluoro-5-(trifluoromethoxy)phenyl)methylamine (4.32 g, 20.656 mmol) were mixed in DMA (75 mL) in a microwave bottle. The reaction was irradiated with microwave at 150° C. for 3 hours. The reaction was cooled to room temperature. 100 mL of ethyl acetate was added to the reaction solution. The resultant mixture was washed with water (30 mL*3) and saturated saline (30 mL*3). The organic layers were combined and concentrated. The concentrate was purified on silicon gel by automatic flash chromatography (ethyl acetate/petroleum ether=0-20%) to give the compound of 3-bromo-6-(2-fluoro-5-(trifluoromethoxy)benzyl)-7,8-dihydro-1,6-naphthyridin-5 (6H)-one (2.356 g, Y: 62%). ES-API: [M+H]+=419.1.
Step 2: 3-bromo-6-(2-fluoro-5-(trifluoromethoxy)benzyl)-7,8-dihydro-1,6-naphthyridin-5 (6H)-one (80 mg, 0.191 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxa borolan-2-yl)benzo[d]thiazole-2-amine (105 mg, 0.382 mmol), sodium carbonate (51 mg, 0.478 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (8 mg, 0.0096 mmol) was dissolved in 5 mL of dioxane and 1 mL of H2O under the protection of nitrogen gas. The mixture was purged with nitrogen gas for three times. The reaction was carried out at 95° C. for 1.5 hours. The reaction was cooled to room temperature. 30 mL of EtOAc was added to the reaction solution. The resultant mixture was washed with water (15 mL*3) and saturated saline (15 mL*3). The organic layers were combined and concentrated. The residue was purified by alkaline HPLC to give 3-(2-aminobenzo[d]thiazol-6-yl)-6-(2-fluoro-5-(trifluoromethoxy)benzyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one as a white solid (20.1 mg, Y: 22%). ES-API: [M+H]+=489.0. 1H NMR (400 MHz, DMSO-d6) δ 8.95 (d, J=2.0 Hz, 1H), 8.40 (d, J=2.0 Hz, 1H), 8.12 (d, J=1.2 Hz, 1H), 7.61-7.59 (m, 3H), 7.44-7.42 (m, 2H), 7.40-7.39 (m, 2H), 4.81 (s, 2H), 3.71 (t, J1=5.6 Hz, J2=10.8 Hz, 2H), 3.17 (t, J1=5.6 Hz, J2=10.8 Hz, 2H).
5-(2-Aminobenzothiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy)phenyl) ethyl)nicotinamide (50 mg, 0.1 mmol), triethylamine (30 mg, 0.3 mmol) and dichloromethane (5 ml) was added to a 50 mL round-bottomed flask. The reaction was carried out in an ice-water bath for 5 minutes. Thereafter, a solution of cyclopropylformal chloride (16 mg, 0.15 mmol) in dichloromethane (1 ml) was added. The reaction was carried out in the ice-water bath for another 10 minutes. 10 ml of water was added to the mixture. The resultant mixture was extracted with 20 ml of dichloromethane for three times. The organic phases were combined, and dried over anhydrous sodium sulfate. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give the compound of 5-(2-(cyclopropylformamido)benzo[d]thiazol-6-yl)-2-methoxy-N-(1-(2-(trifluoromethoxy) phenyl)ethyl)nicotinamide (8 mg, Y: 14%). ES-API: [M+H]+=557.2.
4-(2-Amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (46 mg, 0.149 mmol), (2-(cyclopentyloxy)pyridin-3-yl)methylamine (51 mg, 0.224 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluoro-phosphate (99 mg, 0.224 mmol), triethylamine (45 mg, 0.448 mmol), and N,N-dimethylformamide (5 ml) were added to a 50 mL round-bottomed flask. The reaction was carried out at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-((2-(cyclopentyloxy)pyridin-3-yl)methyl)-1-methyl-1H-indazole-6-carboxamide as an off-white powder (4.0 mg, Y: 6%). ES-API: [M+H]+=483.2.
Step 1: 50 mL of tetrahydrofuran and cyclopropyl methanol (1.08 g, 15.0 mmol) were added to a 100 mL three-necked round-bottomed flask at 0° C. under the protection of nitrogen gas. Next, sodium hydride (600 mg, 15.0 mmol) was added. Finally, 2-fluoronicotinonitrile (1.22 g, 10.0 mmol) was added. The mixture was slowly warmed up to 55° C. and reacted for 12 hours. After the reaction was completed, the mixture was cooled to 0° C. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 2-(cyclopropylmethoxy) nicotinonitrile (1.58 g, Y: 91%). ES-API: [M+H]+=175.1.
Step 2: 50 mL of tetrahydrofuran and 2-(cyclopropylmethoxy) nicotinonitrile (0.50 g, 2.87 mmol) were added to a 500 mL single-necked round-bottomed flask under the the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (14 mL, 1M, 14.0 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give (2-(cyclopropylmethoxy)pyridin-3-yl)methylamine (0.20 g, Y: 40%). ES-API: [M+H]+=179.1.
Step 3: 3.0 mL of N,N-dimethylformamide and triethylamine (164 mg, 1.628 mmol) were added to a 50 mL round-bottomed flask. Next, 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (50 mg, 0.1623 mmol) and (2-(cyclopropylmethoxy)pyridin-3-yl) methylamine (35 mg, 0.1948 mmol) were added. Finally, BOP reagent (87 mg, 0.1948 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 50 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 3 times (40 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then was purified by pre-HPLC to give the target compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-((2-(cyclopropylmethoxy)pyridin-3-yl) methyl)-1-methyl-1H-indazole-6-carboxamide (11.0 mg, Y: 21%). ES-API: [M+H]+=469.1. 1H NMR (400 MHz, DMSO-d6) δ 9.14 (t, J=5.4 Hz, 1H), 8.60 (d, J=6.9 Hz, 1H), 8.23 (d, J=14.7 Hz, 2H), 7.98 (d, J=3.7 Hz, 1H), 7.85 (s, 1H), 7.68 (s, 1H), 7.56 (d, J=6.7 Hz, 1H), 7.34-7.24 (m, 1H), 6.91 (dd, J=7.1, 5.2 Hz, 1H), 6.03 (s, 2H), 4.45 (d, J=5.4 Hz, 2H), 4.15-4.09 (m, 5H), 1.21 (dd, J=13.3, 6.0 Hz, 1H), 0.46 (q, J=5.5 Hz, 2H), 0.27 (t, J=4.7 Hz, 2H).
Step 1: 50 mL of tetrahydrofuran and cyclopropyl methanol (1.08 g, 15.0 mmol) were added to a 100 mL three-necked round-bottomed flask at 0° C. under the protection of nitrogen gas. Next, sodium hydride (600 mg, 15.0 mmol) was added. Finally, 2,5-difluorobenzonitrile (1.39 g, 10.0 mmol) was added. The mixture was slowly warmed up to 55° C. and reacted for 12 hours. After the reaction was completed, the mixture was cooled to 0° C. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give 2-(cyclopropylmethoxy)-5-fluorobenzonitrile (1.757 g, Y: 92%). ES-API: [M+H]+=192.1.
Step 2: 50 mL of tetrahydrofuran and 2-(cyclopropylmethoxy)-5-fluorobenzonitrile ((1.30 g, 6.80 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (34 mL, 1M, 34.0 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give (2-(cyclopropylmethoxy)-5-fluorophenyl)methylamine (0.50 g, Y: 37%). ES-API: [M+H]+=196.0.
Step 3: 10 mL of N,N-dimethylformamide and triethylamine (164 mg, 1.628 mmol) were added to a 50 mL round-bottomed flask. Next, 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (50 mg, 0.1623 mmol) and (2-(cyclopropylmethoxy)-5-fluorophenyl)methylamine (40 mg, 0.1948 mmol) were added. Finally, BOP reagent (87 mg, 0.1948 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 50 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 3 times (40 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then was purified by pre-HPLC to give the compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(2-(cyclopropylmethoxy)-5-fluorobenzyl)-1-methyl-1H-indazole-6-carboxamide (13.0 mg, Y: 22%). ES-API: [M+H]+=486.1. 1H NMR (400 MHz, DMSO-d6) δ 9.10 (d, J=5.5 Hz, 1H), 8.64 (d, J=6.9 Hz, 1H), 8.27 (s, 2H), 7.91 (s, 1H), 7.71 (s, 1H), 7.28 (d, J=6.8 Hz, 1H), 6.99 (dd, J=13.8, 6.9 Hz, 3H), 6.06 (s, 2H), 4.52 (d, J=5.4 Hz, 2H), 4.14 (s, 3H), 3.86 (d, J=6.9 Hz, 2H), 1.22 (s, 1H), 0.53 (d, J=7.0 Hz, 2H), 0.32 (d, J=5.0 Hz, 2H).
Step 1: 20 mL of N,N-dimethylformamide and 4-nitro-1H-pyrazole (500 mg, 4.425 mmol) were added to a 50 mL three-necked round-bottomed flask at room temperature under the protection of nitrogen gas. Next, potassium carbonate (733 mg, 5.311 mmol) was added. Finally, 1-(1-bromoethyl)-4-fluorobenzene (0.9 g, 4.433 mmol) was added. The reaction was carried out at room temperature for 2 hours. After the reaction was completed, 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then purified on silica gel by automatic flash chromatography (ethyl acetate/petroleum ether=0-70%) to give the target compound of 1-(1-(4-fluorophenyl)ethyl)-4-nitro-1H-pyrazole (750 mg, Y: 72%). ES-API: [M+H]+=236.1.
Step 2: 50 mL of methanol, 1-(1-(4-fluorophenyl)ethyl)-4-nitro-1H-pyrazole (750 mg, 3.19 mmol), and finally 0.5 g of palladium on carbon were added to a 100 mL single-necked round-bottomed flask. The reaction was carried out at room temperature under the protection of hydrogen gas for 12 hours. After the reaction was completed, the resultant mixture was filtered. The filtrate was spin-dried to give the target compound of 1-(1-(4-fluorophenyl)ethyl)-1H-pyrazole-4-amine (0.61 g, Y: 93%). ES-API: [M+H]+=206.1.
Step 3: 3 mL of N,N-dimethylformamide and triethylamine (164 mg, 1.628 mmol) were added to a 50 mL single-necked round-bottomed flask. Next, 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (50 mg, 0.1628 mmol) and 1-(1-(4-fluorophenyl)ethyl)-1H-pyrazol-4-amine (50 mg, 0.2440 mmol) were added. Finally, BOP reagent (107 mg, 0.2440 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 5 times (60 mL×5). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then was purified by pre-HPLC to give the target compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(1-(1-(4-fluorophenyl)ethyl)-1H-pyrazol-4-yl)-1-methyl-1H-indazole-6-carboxamide (20.7 mg, Y: 25.6%). ES-API: [M+H]+=496.41. 1H NMR (400 MHz, DMSO-d6) δ 10.57 (s, 1H), 8.63 (d, J=6.9 Hz, 1H), 8.24 (d, J=4.1 Hz, 2H), 8.10 (s, 1H), 7.86 (d, J=1.1 Hz, 1H), 7.74-7.61 (m, 2H), 7.39-7.20 (m, 3H), 7.21-7.04 (m, 2H), 6.06 (s, 2H), 5.60 (q, J=7.0 Hz, 1H), 4.12 (s, 3H), 1.75 (d, J=7.1 Hz, 3H).
Step 1: 50 mL of tetrahydrofuran and tetrahydro-2H-pyran-4-ol (2.04 g, 20.0 mmol) were added to a 100 mL three-necked round-bottomed flask at 0° C. under the protection of nitrogen gas. Next, sodium hydride (600 mg, 15.0 mmol) was added. Finally, 2,5-difluorobenzonitrile (1.39 g, 10.0 mmol) was added. The mixture was slowly warmed up to 55° C. and reacted for 12 hours. After the reaction was completed, the mixture was cooled to 0° C. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 5-fluoro-2-((tetrahydro-2H-pyran-4-yl)oxy)benzonitrile (2.63 g, crude product). ES-API: [M+H]+=222.1.
Step 2: 50 mL of tetrahydrofuran and 5-fluoro-2-((tetrahydro-2H-pyran-4-yl)oxy)benzonitrile (2.53 g, 10.0 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (50 mL, 1M, 50 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (5-fluoro-2-(((tetrahydro-2H-pyran-4-yl)oxy)phenyl)methylamine (1.71 g, Y: 76%). ES-API: [M+H]+=226.1.
Step 3: 3 mL of N,N-dimethylformamide and triethylamine (164 mg, 1.628 mmol) were added to a 50 mL round-bottomed flask. Next, 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (50 mg, 0.1623 mmol) and (5-fluoro-2-(((tetrahydro-2H-pyran-4-yl)oxy)phenyl)methylamine (55 mg, 0.2444 mmol) were added. Finally, BOP reagent (108 mg, 0.2444 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 50 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 3 times (40 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then was purified by pre-HPLC to give the target compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(5-fluoro-2-((tetrahydro-2H-pyran-4-yl)oxy)benzyl)-1-methyl-1H-indazole-6-carboxamide (23.6 mg, Y: 28%). ES-API: [M+H]+=516.1. 1H NMR (500 MHz, DMSO-d6) δ 9.06 (t, J=5.8 Hz, 1H), 8.62 (dd, J=6.9, 0.6 Hz, 1H), 8.30-8.17 (m, 2H), 7.87 (d, J=1.1 Hz, 1H), 7.68 (d, J=1.1 Hz, 1H), 7.24 (dd, J=6.9, 1.9 Hz, 1H), 7.00 (dtd, J=11.8, 8.8, 3.9 Hz, 3H), 6.04 (s, 2H), 4.60-4.43 (m, 3H), 4.11 (s, 3H), 3.84-3.77 (m, 2H), 3.43 (ddd, J=11.5, 8.5, 3.0 Hz, 2H), 1.95-1.85 (m, 2H), 1.59 (dtd, J=12.5, 8.3, 3.9 Hz, 2H).
Step 1: 50 mL of tetrahydrofuran and tetrahydrofuran-3-ol (1.76 g, 20.0 mmol) were added to a 100 mL three-necked round-bottomed flask at 0° C. under the protection of nitrogen gas. Next, sodium hydride (600 mg, 15.0 mmol) was added. Finally, 2,5-difluorobenzonitrile (1.39 g, 10.0 mmol) was added. The mixture was slowly warmed up to 55° C. and reacted for 12 hours. After the reaction was completed, the mixture was cooled to 0° C. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 5-fluoro-2-((tetrahydrofuran-3-yl)oxy)benzonitrile (2.35 g, crude product). ES-API: [M+H]+=208.0.
Step 2: 50 mL of tetrahydrofuran and 5-fluoro-2-((tetrahydrofuran-3-yl)oxy)benzonitrile (2.35 g, 10.0 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (50 mL, 1M, 50 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (5-fluoro-2-(((tetrahydrofuran-3-yl)oxy)phenyl)methylamine (1.51 g, Y: 71%). ES-API: [M+H]+=212.1.
Step 3: 3 mL of N,N-dimethylformamide and triethylamine (164 mg, 1.628 mmol) were added to a 50 mL single-necked round-bottomed flask. Next, 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1-methyl-1H-indazole-6-carboxylic acid (50 mg, 0.1623 mmol) and (5-fluoro-2-(((tetrahydrofuran-3-yl)oxy)phenyl)methylamine (50 mg, 0.2370 mmol) were added. Finally, BOP reagent (107 mg, 0.2434 mmol) was added. The reaction was carried out at room temperature under the protection of nitrogen gas for 2 hours. After the reaction was completed, 50 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride for 3 times (40 mL×3). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried, and then was purified by pre-HPLC to give the target compound of 4-(2-amino-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-N-(5-fluoro-2-((tetrahydrofuran-3-yl)oxy) benzyl)-1-methyl-1H-indazole-6-carboxamide (27.4 mg, Y: 34%). ES-API: [M+H]+=502.1. 1H NMR (500 MHz, DMSO-d6) δ 9.03 (t, J=5.8 Hz, 1H), 8.63 (d, J=6.9 Hz, 1H), 8.23 (d, J=5.8 Hz, 2H), 7.86 (d, J=1.0 Hz, 1H), 7.69 (d, J=1.2 Hz, 1H), 7.26 (dd, J=6.9, 1.9 Hz, 1H), 6.97 (ddd, J=14.5, 12.5, 6.7 Hz, 3H), 6.09 (s, 2H), 5.01 (dd, J=5.9, 4.5 Hz, 1H), 4.51-4.37 (m, 2H), 4.11 (s, 3H), 3.82 (ddd, J=24.3, 13.7, 6.9 Hz, 3H), 3.71 (td, J=8.3, 4.3 Hz, 1H), 2.14 (dtd, J=14.3, 8.3, 6.1 Hz, 1H), 2.01-1.92 (m, 1H).
5-(2-Aminobenzo[d]thiazol-6-yl)-2-methoxynicotinic acid (80 mg, 0.253 mmol), 1-(1-(4-fluorophenyl)ethyl)-1H-pyrazole-4-amine (62 mg, 0.304 mmol), ((benzotriazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate (134 mg, 0.304 mmol), triethylamine (77 mg, 0.759 mmol), and N,N-dimethylformamide (5 ml) were added to a 100 mL round-bottom flask. The mixture was reacted at room temperature for 2 hours. 15 mL of water was added. The resultant mixture was extracted with 30 mL of ethyl acetate for 3 times. The organic phases were combined, dried over anhydrous sodium sulfate, and filtered. The crude product obtained by concentrating the organic phase was purified by alkaline HPLC to give 5-(2-aminobenzo[d]thiazol-6-yl)-N-(1-(1-(4-fluorophenyl)ethyl)-1H-pyrazol-4-yl)-2-methoxynicotinamide as an off-white powder (29.96 mg, Y: 24%). ES-API: [M+H]+=489.1. 1H NMR (400 MHz, DMSO-d6) δ 10.27 (s, 1H), 8.61 (d, J=2.0 Hz, 1H), 8.28 (d, J=2.0 Hz, 1H), 8.13 (s, 1H), 8.04 (d, J=1.6 Hz, 1H), 7.64 (s, 1H), 7.58 (s, 2H), 7.55 (dd, J1=1.2 Hz, J2=6.4 Hz, 1H), 7.40 (d, J=6.8 Hz, 1H), 7.34-7.31 (m, 2H), 7.19-7.16 (m, 2H), 5.66-5.62 (m, 1H), 4.01 (s, 3H), 1.80 (d, J=6.0 Hz, 3H).
Step 1: 25 mL of anhydrous N,N-dimethylformamide and cyclopropanol (554 mg, 9.552 mmol) were added to a 100 mL three-necked round-bottomed flask at room temperature under the protection of nitrogen gas. Next, cesium carbonate (6.21 g, 19.06 mmol) was added. Finally, 2,3,5-trifluorobenzonitrile (1.0 g, 6.370 mmol) was added. The mixture was slowly warmed up to 75° C. and reacted for 7 hours. After the reaction was completed, the mixture was cooled to room temperature. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (60 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of 2-cyclopropoxy-3,5-difluorobenzonitrile (1.52 g, crude product). ES-API: [M+H]+=196.05.
Step 2: 50 mL of tetrahydrofuran and 2-cyclopropoxy-3,5-difluorobenzonitrile (1.52 g, 6.37 mmol) were added to a 500 mL single-necked round-bottomed flask under the protection of nitrogen gas. Finally, borane-tetrahydrofuran complex (30 mL, 1M, 30 mmol) was added. The mixture was warmed up slowly from room temperature to be boiling, and the reaction was carried out overnight. After the reaction was completed, the resultant mixture was cooled to room temperature. Methanol was carefully added dropwise until no more bubbles were generated. 80 mL of ethyl acetate was added to the system. The resultant mixture was sequentially washed with saturated ammonium chloride and sodium chloride twice (70 mL×2). The phase of ethyl acetate was dried over anhydrous sodium sulfate and filtered. The filtrate was spin-dried to give the target compound of (2-cyclopropoxy-3,5-difluorophenyl)methylamine (0.80 g, Y: 64%). ES-API: [M+H]+=200.1.
Step 3: Methyl 5-bromo-2-vinylnicotinate (150 mg, 0.625 mmol) and (2-cyclopropoxy-3,5-difluorophenyl) methylamine (400 mg, 2.010 mmol) were mixed in DMA (2 mL) in a microwave bottle. The reaction was irradiated with microwave at 180° C. for 1 hour. The reaction was cooled to room temperature. 50 mL of ethyl acetate was added to the reaction solution. The resultant mixture was washed with water (45 mL*3) and saturated saline (45 mL*3). The organic layers were combined and concentrated. The concentrate was purified on silicon gel by automatic flash chromatography (ethyl acetate/petroleum ether=0-50%) to give the compound of 3-bromo-6-(2-cyclopropoxy-3,5-difluorobenzyl)-7,8-dihydro-1,6-naphthyridin-5 (6H)-1-one (95 mg, Y: 55%). ES-API: [M+H]+=409.
Step 4: 3-Bromo-6-(2-cyclopropoxy-3,5-difluorobenzyl)-7,8-dihydro-1,6-naphthyridin-5 (6H)-1-one (135.0 mg, 0.3300 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole-2-amine (109.3 mg, 0.4644 mmol), sodium carbonate (105 mg, 0.990 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (36.0 mg, 0.050 mmol) were dissolved in 9 mL of dioxane and 1.5 mL of H2O under the protection of nitrogen gas. The mixture was purged with nitrogen gas for three times. The reaction was carried out at 90° C. at a condition of microwave for 35 minutes. The reaction mixture was cooled to room temperature, and concentrated. The crude product was purified by alkaline HPLC to give 3-(2-aminobenzo[d]thiazol-6-yl)-6-(2-cyclopropoxy-3,5-difluorobenzyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one as a white solid (51 mg, Y: 22%). ES-API: [M+H]+=479.1. 1H NMR (500 MHz, DMSO-d6) δ 8.95 (d, J=2.4 Hz, 1H), 8.40 (d, J=2.4 Hz, 1H), 8.13 (d, J=1.9 Hz, 1H), 7.69-7.58 (m, 3H), 7.44 (d, J=8.3 Hz, 1H), 7.29 (ddd, J=11.6, 8.7, 3.0 Hz, 1H), 6.97 (d, J=9.0 Hz, 1H), 4.69 (s, 2H), 4.21 (dt, J=9.0, 3.0 Hz, 1H), 3.66 (t, J=6.8 Hz, 2H), 3.18 (t, J=6.7 Hz, 2H), 0.88-0.80 (m, 2H), 0.65-0.59 (m, 2H).
Step 1: Methyl 5-bromo-2-vinylnicotinate (300 mg, 1.250 mmol) and (2-fluoro-5-(trifluoromethyl)phenyl)methylamine (600 mg, 3.108 mmol) were mixed in dimethylacetamide (2.5 mL) in a microwave bottle. The reaction was irradiated with microwave at 150° C. for 2 hours. The reaction was cooled to room temperature. 50 mL of ethyl acetate was added to the reaction solution. The resultant mixture was washed with water (45 mL*3) and saturated saline (45 mL*3). The organic layers were combined and concentrated. The concentrate was purified on silicon gel by automatic flash chromatography (ethyl acetate/petroleum ether=0-50%) to give the compound of 3-bromo-6-(2-fluoro-5-(trifluoromethyl)benzyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (320 mg, Y: 63.7%). ES-API: [M+H]+=401.
Step 2: 3-Bromo-6-(2-fluoro-5-(trifluoromethyl)benzyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one (160 mg, 0.3960 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole-2-amine (131.0 mg, 0.4746 mmol), sodium carbonate (125 mg, 1.180 mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium-dichloromethane complex (40.0 mg, 0.05451 mmol) were dissolved in 9 mL of dioxane and 2 mL of H2O under the protection of nitrogen gas. The mixture was purged with nitrogen gas for three times. The reaction was carried out at 90° C. at a condition of microwave for 35 minutes. The reaction mixture was cooled to room temperature, and concentrated. The crude product was purified by alkaline HPLC to give 3-(2-aminobenzo[d]thiazol-6-yl)-6-(2-fluoro-5-(trifluoro methyl)benzyl)-7,8-dihydro-1,6-naphthyridin-5(6H)-one as a white solid (58.0 mg, Y: 32%). ES-API: [M+H]+=473.0. 1H NMR 1H NMR (400 MHz, DMSO-d6) δ 8.96 (d, J=2.4 Hz, 1H), 8.41 (d, J=2.3 Hz, 1H), 8.13 (d, J=1.8 Hz, 1H), 7.86-7.74 (m, 2H), 7.70-7.58 (m, 3H), 7.50 (t, J=9.2 Hz, 1H), 7.43 (d, J=8.3 Hz, 1H), 4.86 (s, 2H), 3.73 (t, J=6.7 Hz, 2H), 3.17 (t, J=6.7 Hz, 2H).
The U937 cell strain which was used in the following Testing Examples was derived from ATCC, No.: CRL-1593.2, batch No.: 63479999, culture medium: RPMI-1640+10% FBS.
The agents and their suppliers and product Nos are as follows:
RPMI-1640, Gibco, 11875-093;
FBS, Gibco, 10099-141;
Trypsin-EDTA, Gibco, 25200-072;
PS, Gibco, 15140-122;
CellTiter Glo, Progema, G7573;
DMSO, VWR AMRESCO, 0231-500ML;
TNF-α protein (human, recombinant), Peprotech, 300-01A;
Q-VD-Oph, MCE, HY-12305;
V type plate, Corning, 3894;
384-cell low-flange white flat-bottom microplate, Corning, 3570;
RIPK1, Eurofins, 16-022;
MOPS, BDH, 441644J;
EDTA, Sigma, E5134;
Myelin basic protein, Sigma, M1891-25.00 MG;
Magnesium acetate, Merck, DU008026;
ATP (non-radioactive labeled), Sigma, A-7699;
ATP (radioactive labelled), Hartmann Analytic, DU008054;
Phosphoris acid, Metlab, DU003000.
The test compound was dissolved in DMSO to prepare a 10 mM stock solution. The stock solution was diluted in 3.16 folds with DMSO to a series of gradient concentrations. Then, the resultant solution was diluted in 50 folds with MOPS buffer pH 7.0 to prepare a working solution. The working solution was mixed with 36 nM RIPK1 (final concentration) and 0.33 mg/ml substrate MBP homogeneously. Thereafter, 10 mM magnesium ion and 155 μM P33 isotopically labeled ATP were added for the reaction. The final concentration of DMSO was 2%. After the reaction was carried out at room temperature for 2 hours phosphoric acid was added to terminate the reaction. The final reaction system was tested using a liquid scintillation counter after treatment. The result obtained by subtracting a blank control from the tested value was converted to activity percentage as compared to the readout value of control group. The activity percentage was plotted against the final concentration of respective compound using a 4-parameter fitting to obtain the inhibitory IC50 of the compound against RIPK1 enzyme. The testing results are shown in Table 1.
The compound was dissolved in DMSO to prepare a 10 mM stock solution. The stock solution was diluted in 3.16 folds with DMSO to a series of gradient concentrations. Then, the resultant solution was diluted in 250 folds with a culture medium to prepare a working solution. The U937 cells were inoculated in a 384-well plate at 5000/well. The compound at respective concentration was added to each of the cells, and was mixed with the cells homogeneously. 100 ng/ml human TNF-α and 25 μM Q-VD-Oph were added simultaneously to induce programmed necroptosis of the cells. The final concentration of DMSO was 2%. The cells were placed in the incubator at 37° C. and 5% CO2 for further culture of 48 hours. Celltiter-Glo reagent was used for detection. After adequate pyrolysis reaction, the chemiluminescence readout value was recorded by a microplate reader. The survival rate was calculated from the detection results using the equation as follows: SR (%)=(RLU compound−RLU blank)/(RLU high control−RLU blank)×100%. The survival rate was plotted against the final concentration of respective compound using a 4-parameter fitting to calculate the inhibitory IC50 of the compound against programmed necroptosis of cells induced by TNF-a. The testing results of exemplary compounds are shown in Table 2.
The compound was dissolve in DMSO to prepare a 10 mM stock solution. The stock solution was diluted in 3.16 folds with DMSO to a series of gradient concentrations. Then, the resultant solution was diluted in 100 folds with a culture medium to prepare a working solution. The L929 cells were inoculated in a 384-well plate at 10000/well. The compound at respective concentration was added to each of the wells, and was mixed with the cells homogeneously. 30 ng/ml murine TNF-α and 15 μM Z-VAD were added simultaneously to induce programmed necroptosis of the cells. The final concentration of DMSO was 2%. The cells were placed in an incubator at 37° C. and 5% CO2 for further culture of 6 hours. CellTiter-Glo reagent was used for detection. After adequate pyrolysis reaction, the chemiluminescence readout value was recorded by a microplate reader. The survival rate was calculated from the detection results using the equation as follows: SR (%)=(RLU compound −RLU blank)/(RLU high control−RLU blank)×100%. The survival rate was plotted against the final concentration of respective compound using a 4-parameter fitting to calculate the inhibitory IC50 of the compound against programmed necroptosis of cells induced by TNF-a. The testing results of exemplary compounds are shown in Table 3.
Although specific embodiments of the invention have been described in details, from all the public teachings, a person skilled in the art may make various modifications and alternatives, which are within the protection scope of the present invention. The protection scope of the present invention is provided by the attached claims and any equivalents thereof.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910221799.X | Mar 2019 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/080306 | 3/20/2020 | WO | 00 |
