Patent Application
20150238601
The invention relates to treatment of ocular disorders, including ocular disorders with an angiogenic component. In certain embodiments, the treatment comprises administration of a ROCK2 inhibitor and an angiogenesis inhibitor. In certain embodiments, the angiogenesis inhibitor is a VEGF antagonist. In certain embodiments, the angiogenesis inhibitor is a VEGFR2 antibody. The invention further provides novel ROCK inhibitors and novel VEGFR2 antibodies.
This application claims priority to U.S. Application No. 61/710,467, filed Oct. 5, 2012, which is incorporated herein by reference in its entirety.
Rho-associated protein kinase (ROCK) is a key intracellular regulator of cytoskeletal dynamics and cell motility. Rho-kinase regulates a number of downstream targets of RhoA through phosphorylation, including, for example, myosin light chain, the myosin light chain phosphatase binding subunit and LIM-kinase 2. These substrates regulate actin filament organization and contractility. In smooth muscle cells Rho-kinase mediates calcium sensitization and smooth muscle contraction. Inhibition of Rho-kinase blocks 5-HT and phenylephrine agonist induced muscle contraction. When introduced into non-smooth muscle cells, Rho kinase induces stress fiber formation and is required for the cellular transformation mediated by RhoA. Rho kinase participates in a variety of cellular processes, including but not limited to cell adhesion, cell motility and migration, growth control, cell contraction, and cytokinesis. Rho kinase is also involved in Na/H exchange transport system activation, stress fiber formation, adducin activation, and physiological processes such as vasoconstriction, bronchial smooth muscle constriction, vascular smooth muscle and endothelial cell proliferation, platelet aggregation, and others.
Inhibition of Rho-kinase activity in animal models has demonstrated a number of benefits of Rho-kinase inhibition for the treatment of human diseases. These include models of cardiovascular diseases such as hypertension, atherosclerosis, restenosis, cardiac hypertrophy, ocular hypertension, cerebral ischemia, cerebral vasospasm, penile erectile dysfunction, central nervous system disorders such as neuronal degeneration and spinal cord injury, and in neoplasias. Inhibition of Rho-kinase activity has been shown to inhibit tumor cell growth and metastasis, angiogenesis, arterial thrombotic disorders such as platelet aggregation and leukocyte aggregation, asthma, regulation of intraoccular pressure, and bone resorption. The inhibition of Rho-kinase activity in patients has benefits for controlling cerebral vasospasms and ischemia following subarachnoid hemorrhage, reduction of intraocular pressure, increase in ocular aqueous outflow by relaxation of trabecular meshwork tissue, improving blood flow to the optic nerve, and protection of healthy ganglion cells.
In mammals, Rho-kinase consists of two isoforms, ROCK1 (ROCKβ; p160-ROCK) and ROCK2 (ROCKα). ROCK1 and ROCK2 are differentially expressed and regulated in specific tissues. For example, ROCK1 is ubiquitously expressed at relatively high levels, whereas ROCK2 is preferentially expressed in cardiac and brain and skeletal muscle. The isoforms are also expressed in some tissues and in a developmental stage specific manner. ROCK1 is a substrate for cleavage by caspase-3 during apoptosis, whereas ROCK2 is not. Smooth muscle specific basic calponin is phosphorylated only by ROCK2.
Angiogenesis is a highly complex process of developing new blood vessels that involves the proliferation and migration of, and tissue infiltration by capillary endothelial cells from pre-existing blood vessels, cell assembly into tubular structures, joining of newly forming tubular assemblies to closed-circuit vascular systems, and maturation of newly formed capillary vessels.
Angiogenesis is important in normal physiological processes including embryonic development, follicular growth, and wound healing. Undue angiogenesis also leads to neovascularization in neoplastic diseases, and in non-neoplastic diseases such as age-related macular degeneration, diabetic retinopathy, and neovascular glaucoma. Anti-angiogenic therapy that targets vascular endothelial growth factor (VEGF) with ranibizumab (Lucentis) has been shown to be effective in delaying progression of AMD. However, neovascularization is complex and multiple angiogenic mechanisms are likely to contribute. There remains a need to develop agents and therapies for treating diseases associated with neovascularization.
Glaucoma is associated with higher-than-normal pressure inside the eye (ocular hypertension), and if uncontrolled, leads first to loss of peripheral vision loss and eventually can lead to blindness. The two major types of glaucoma are chronic or primary open-angle glaucoma (POAG) and acute angle-closure glaucoma, both of which are characterized by high intraocular pressure (IOP). Normal tension glaucoma causes visual field loss due to optic nerve damage, but is characterized by normal IOP. The cause is thought to be poor blood flow to the optic nerve. Pigmentary glaucoma is characterized by reduced outflow from the eye caused by pigment that has broken loose from the iris and clogged the drainage angle. Secondary glaucoma develops from an eye injury, infection, inflammation, a tumor or enlargement of the lens due to a cataract. Lastly, congenital glaucoma results from a defect, typically narrow angles, that results in defective drainage of the eye.
The invention relates to treatment of disorders which have an angiogenic component. In certain embodiments, the disorder is an ocular disorder. According to the invention, such disorders are treated with a ROCK2 inhibitor, which can be a non-selective “pan-ROCK” inhibitor or a selective ROCK2 inhibitor. In certain such embodiments, an angiogenesis inhibitor is also administered. The invention also relates to treatment of ocular disorders without an angiogenic component such as certain glaucomas, with a ROCK inhibitor. The invention provides agents for use in the therapies.
Angiogenesis occurs in ocular diseases such as macular degeneration (AMD), choroidal neovascularization (CNV), diabetic macular edema (DME), iris neovascularization, uveitis, neovascular glaucoma, or retinitis of prematurity (ROP). Angiogensis also occurs in diseases such as cancer, rheumatoid arthritis, psoriasis, and more than 70) other conditions. In these conditions, new blood vessels feed diseased tissues, destroy normal tissues, and in the case of cancer, the new vessels allow tumor cells to escape into the circulation and lodge in other organs (tumor metastases) Excessive angiogenesis occurs when diseased cells produce abnormal amounts of angiogenic growth factors, overwhelming the effects of natural angiogenesis inhibitors.
Thus, the invention provides a method of treating an ocular disorder having an angiogenic component in a subject, which comprises administering to the subject an effective amount of a rho kinase inhibitor that inhibits ROCK2 and an angiogenesis inhibitor. The invention also provides a method of treating a certain non-ocular disorders having an angiogenic component, which comprises administering to the subject an effective amount of a rho kinase inhibitor that inhibits ROCK2 and an angiogenesis inhibitor. In an embodiment of the invention, the ROCK2 inhibitor is ROCK2-selective. ROCK2 inhibitors for use according to the invention include, without limitation, compounds set forth by Formulae I-XXV described herein. Additional ROCK2 inhibitors are set forth by Formulae XXXI-XXXVI, including the ROCK2-selective compound SLx-2119 is employed.
Angiogenesis inhibitors are also provided, and include, without limitation, VEGF antagonists such as the VEGFR2 antibodies described herein. In some embodiments, the VEGF antagonist is VEGF-specific, including, but not limited to Avastin and Lucentis.
In certain of the therapies of the invention, the method of treatment further comprises administration of a TGF-β antagonist.
Certain compounds of the invention have the formula I:
or a pharmaceutically acceptable salt thereof, wherein:
R10 is selected from the group consisting of H, CN, halo, hydroxy, lower alkoxy, amino, perfluoro lower alkyl, C1-C10 alkyl, C2-C10 alkenyl, and -(M)x-(CH2)y—R11;
Other compounds of the invention are set forth below.
The present invention includes pharmaceutical compositions comprising the compounds of the invention and a pharmaceutically acceptable carrier and/or diluents.
The invention also provides angiogenesis inhibitors useful in treating disorders with an angiogenic component, including novel anti-VEGFR2 antibodies, nucleic acids encoding such antibodies and compositions comprising such antibodies. In one embodiment the invention provides an isolated heavy chain variable region comprising a CDR-1H, CDR-2H, and CDR-3H sequence, wherein:
(i) the CDR-1H sequence is GFTFSWYX1MX2 (SEQ ID NO:185), wherein X1 is V or I, X2 is G or L,
(ii) the CDR-2H sequence is SIX1X2SGGX3TX4YADSVKG (SEQ ID NO:186), wherein X1 is Y or G, X2 is P or S, X3 is A or F, X4 is N or D, and
(iii) the CDR-3H sequence is GNYFDY (SEQ ID NO:3) or GLAAPRS (SEQ ID NO:11).
In one embodiment, the invention provides an isolated light chain variable region comprising a CDR-1L, CDR-2L, and CDR-3L, wherein
(i) the CDR-1L sequence is X1GX2X3LX4X5X6X7X8S (SEQ ID NO:187), wherein X1 is S, Q, or T, X2 is D, E, or Q, X3 is K, S, N, I, or A, X4 is G or R, X5 is D, S, H, E, or N, X6 is E, Y, Q, R, or N, X7 is Y, F, or S, and X8 is A or S, or SGSX1SNX2X3X4X5X6X7X8 (SEQ ID NO: 188), wherein X1 is S, or T, X2 is I or L, X3 is E or G, X4 is T, S, or N, X5 is N or Y, X6 is T. P, A, or Y, X7 is V or L, and X8 is N, I, or Y, or X1GX2SX3DX4GX5YDYVS (SEQ ID NO: 189), wherein X1 is A or T, X2 is S or T, X3 is H, S, or N, X4 is I or V, and X5 is S or A,
(ii) the CDR-2L sequence is X1X2X3X4X5PS (SEQ ID NO:190), wherein X1 is Q, D, T, Y, S, or A, X2 is D, N, S, T, V, or V, X3 is D, N, S, T, or Y, X4 is Q, K, N, or L, and X5 is R or L, and
(iii) wherein the CDR-3L sequence is QX1WX2X3X4X5X6X7X8 (SEQ ID NO:191), wherein X1 is A or T, X2 is D or G, X3 is R or no amino acid, X4 is S, F, on N, X5 is S, T, on N, X6 is S, T, or P, X7 is A, V, L, I, or Y, and X8 is V or L, or AX1WDDX2LX3X4X5X6 (SEQ ID NO:192), wherein X1 is A, S, or T, X2 is N or S, X3 is N, I, or G, X4 is G or S, X5 is P, W, or V, and X6 is V or L, or MYSTITX1LL (SEQ ID NO:193), wherein X1 is A or T.
In one embodiment, the invention provides an isolated light chain variable region comprising a CDR-1L, CDR-2L, and CDR-3L, wherein
(i) the CDR-1L sequence is RASX1X2X3X4X5X6X7YX5X9 (SEQ ID NO:194), wherein X1 is Q, E, or H, X2 is S, R, or N, X3 is V, I, or L, X4 is S, R, G or N, X5 is S or N, X6 is S, N, W, or D, X7 is G or no amino acid, X8 is L or F, and X9 is A, G, M, or S,
(ii) the CDR-2L sequence is GASX1RAT (SEQ ID NO:195), wherein X1 is S, T, I, or N, and
(iii) the CDR-3L sequence is QQX1X2X3X4X5X6X7X8 (SEQ ID NO: 196), wherein X1 is F or Y, X2 is D, G, or Y, X3 is S, T, or N, X4 is S, L, or W, X5 is P or no amino acid, X6 is P or T, X7 is L, I, V, P, W, or Y, and X8 is T or S.
In an embodiment of the invention, an antibody is provided which comprises a heavy chain variable domain comprising one, two, three, four, five, or six of the light chain variable domain and heavy chain variable domain CDR sequences set forth above. Examples of such antibodies are provided herein.
The invention also provides a method of treating glaucoma comprising administering an effective amount of a rho kinase inhibitor. Varieties of glaucoma to be treated include, without limitation, the two major types, chronic or primary open-angle glaucoma (POAG) and acute angle-closure glaucoma, as well as normal tension glaucoma, pigmentary glaucoma, secondary glaucoma that develops from an eye injury, infection, inflammation, a tumor or enlargement of the lens due to a cataract, and congenital glaucoma.
The invention also relates to non-ocular disorders having an angiogenic component. Thus, the invention provides a method of treating a disorder having an angiogenic component in a subject, which comprises administering to the subject an effective amount of a rho kinase inhibitor and an angiogenesis inhibitor. Non-limiting examples include atherosclerosis, rheumatoid arthritis (RA), hemangiomas, angiofibromas, psoriasis, corneal graft rejection, insulin-dependent diabetes mellitus, multiple sclerosis, myasthenia gravis, Chron's disease, autoimmune nephritis, primary biliary cirrhosis, acute pancreatitis, allograph rejection, allergic inflammation, contact dermatitis, delayed type hypersensitivity, inflammatory bowel disease, septic shock, osteoporosis, osteoarthritis, neuronal inflammation, Osler-Weber syndrome, restenosis, or fungal, parasitic or viral infection.
The invention relates to treatment of disorders which have an angiogenic component. In certain embodiments, the disorder is an ocular disorder. According to the invention, such disorders are treated with a ROCK2 inhibitor, which can be a non-selective “pan-ROCK” inhibitor or a selective ROCK2 inhibitor. In certain such embodiments, an angiogenesis inhibitor is also administered. The invention also relates to treatment of ocular disorders without an angiogenic component such as certain glaucomas, with a ROCK inhibitor.
In one aspect, the present invention provides compounds of Formula I that are inhibitors of Rho-kinase. Rho kinase (ROCK), a serine/threonine kinase, serves as a target protein for small GTP-binding protein Rho, and is an important mediator of numerous cellular functions, including focal adhesions, motility, smooth muscle contraction, and cytokinesis. In smooth muscle, ROCK plays an important role in Ca2+ sensitization and the control of vascular tone. It modulates the level of phosphorylation of the myosin II light chain of myosin II, mainly through inhibition of myosin phosphatase, and contributes to agonist-induced Ca2+ sensitization in smooth muscle contraction. In certain embodiments, the compound of Formula I selectively inhibits ROCK2.
Compounds useful according to the present invention include those having the formula I:
wherein:
In certain embodiments of the invention, the ring system of R8 is saturated, contains one or more double bonds, or is aromatic. The ring system than comprises R8 is preferably a monocyclic or a bicyclic ring system having 4 to 10 ring atoms. In certain aspects of the invention, R8 is selected from:
wherein R9 is selected from H, halogen and lower alkyl.
In certain embodiments, R2 is a substituted aryl group and is preferably a substituted phenyl group.
In certain aspects of the invention, the compounds useful according to the present invention include those having the formula II, III or IV:
wherein R2, R6, R7, X and Z are as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula V or VI:
wherein R6, R7, X, Z and R10 are as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula VII:
wherein R6, R7, X, Z, and R10 are as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula IX:
wherein R6, R7, X and Z are as defined above for formula I, and T is —(CH2)y—R11 wherein y and R11 are as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula X:
wherein R6, R7, X and Z are as defined above for formula I, and R′ is R13 as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula XI:
wherein R6, R7, X and Z are as defined above for formula I, and T1 is R12 as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula XII:
wherein R6, R7, X and Z are as defined above for formula I, and T1 is R12 as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula XIII:
wherein R6, R7, X and Z are as defined above for formula I, A is M as defined above for formula 1 and W is R12 as defined above for formula I.
In other aspects of the invention, the compounds useful according to the present invention include those having the formula XIV:
wherein X, Z and R13 are as defined above for formula I.
In certain aspects of the invention, for each of the compounds depicted above, the moiety
may be selected from a heteroaromatic group such that Y is N. In other aspects of the invention, both Y and X are N, and in still other aspects X, Y and Z are each N. In preferred aspects of the invention, this heteroaromatic group is selected from any one of the following groups:
In other aspects of the invention, the compounds useful according to the present invention include those having the formula XVI:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In an embodiment of the invention R13 is selected from the group consisting of C1-C8 alkyl, C3-C7 cycloalkyl and a three to twelve-membered heterocyclic ring. In an another embodiment of the invention R13 is selected from the group consisting of isopropyl, cycloalkyl, N-morpholino and 3-pyridine. In an embodiment of the invention R14 is H. In an embodiment of the invention R2 is H. In another embodiment of the invention R2 is F. In an embodiment of the invention R3 is selected from the group consisting of H, C1-C8 alkyl and C1-C3 perfluoro alkyl. In an another embodiment of the invention R3 is selected from the group consisting of H, CH3 and CF3. In an embodiment of the invention R4 is selected from the group consisting of H, C1-C8 alkyl, C1-C3 perfluoro alkyl and a three to twelve-membered heterocyclic ring. In an another embodiment of the invention R4 is selected from the group consisting of H, CH3, CF3, piperazinyl and N-morpholino.
In aspects of the invention, the compounds useful according to the present invention include those having the formula XVII:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
X is selected from the group consisting of —NH—C(═O)—CHR13R14; —NH—C(═O)—(CH2)b—NR13R14; —C(═O)NR13R14;
In an embodiment of the invention R13 is a three to twelve-membered heterocyclic ring. In an another embodiment of the invention R13 is selected from the group consisting of isopropyl, cycloalkyl, N-morpholino, 3-pyridinyl, tetrahydropyranyl, piperdinyl, and tetrahydrothiopyranyl dioxide. In an another embodiment of the invention R13 is selected from the group consisting of:
In an embodiment of the invention R14 is H. In an embodiment of the invention R3 and R4 are each H.
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XVIII:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
each R3 and R4 is independently selected from the group consisting of H, C1-C8 alkyl, —CN, halo, —OH, —O—(C1-C6 alkyl), —O—(C1-C6 alkyl)-O—(C1-C6 alkyl), —NR31R32, CF3, —O—(CH2)aNR31R32, aryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted from 1 to 3 substituents independently selected from halo and C1-C6 alkyl;
R15 is selected from the group consisting of H, C1-C8 alkyl, —CN, halo, —OH, —O—(C1-C6 alkyl), —O—(C1-C6 alkyl)-O—(C1-C6 alkyl), —C(═O)—O—C(R)331, CF3, C3-C7 cycloalkyl, a three to twelve membered heterocyclic or aromatic ring having up to 3 heteroatoms which is optionally substituted from 1 to 3 substituents independently selected from halo and C1-C6 alkyl;
In aspects of the invention, the compounds useful according to the present invention include those having the formula XIX:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In an embodiment of the invention Y forms a three-membered cycloalkane. In an another embodiment of the invention Y is fluoro;
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XX:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XXI:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XXII:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
R4 is selected from the group consisting of H, C1-C8 alkyl, —CN, halo, —OH, —O—(C1-C6 alkyl), —O—(C1-C6 alkyl)-O—(C1-C6 alkyl), —NR31R32, C1-C3 perfluoro alkyl, —O—(CH2)aNR31R32, aryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted from 1 to 3 substituents independently selected from halo and C1-C6 alkyl;
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XXIII:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XXIV:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In another aspect of the invention, the compounds useful according to the present invention include those having the formula XXV:
or pharmaceutically acceptable salt or stereoisomer thereof, wherein:
In other aspects of the invention, the ROCK2 inhibiting compound may be selected from the ROCK2 compounds disclosed in PCT/US2006/011271, filed Mar. 27, 2006, which is incorporated by reference herein in its entirety. Thus, the ROCK2 inhibiting compound may have the formula XXXI:
or pharmaceutically acceptable salt, wherein:
R1 is selected from the group consisting of —O—(CH2)y—CO2R12, —O—(CH2)y—C(═O)NR13R14, —O—(CH2)y-heteroaryl, —O—(CH2)y-cycloalkyl, —O—C(═O)—(CH2)y—NR13R14, —O—(CH2)z—NR13R14, —NH—C(═O)—(CH2)y—NR3R14, —NH—C(═O)—X—R15, —NH—(CH2)y—NR13R14;
R12 is selected from the group consisting of C1-C6 alkyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, —(C1-C6 alkyl)-O—(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted at one or more carbon atoms by from 1 to 3 substituents independently selected from halo, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
X is selected from a covalent bond, O, NH, and C1-C6 alkyl;
In one embodiment of Formula XXXI, R4 and R5 are independently selected from H and C1-C6 alkyl. In another embodiment, R4 and R5 are H.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXII:
or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3, n and m are as for the compound of the formula I.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXIII:
or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3, n and m are as for the compound of the formula I.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXIV:
or a pharmaceutically acceptable salt thereof, wherein:
R13 and R14 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C3-C7 cycloalkyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R13 and R14 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, C3-C7 cycloalkyl, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
X is selected from a covalent bond, O, NH, and C1-C6 alkyl;
R16 and R17 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R16 and R17 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
each R2 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
each R3 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
n is selected from 0 to 4; and
m is selected from 0 to 3.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXIVa:
or a pharmaceutically acceptable salt thereof, wherein:
R13 and R14 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C3-C7 cycloalkyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R13 and R14 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
R16 and R17 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R16 and R17 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXV:
or a pharmaceutically acceptable salt thereof, wherein:
R12 is selected from the group consisting of C1-C6 alkyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, —(C1-C6 alkyl)-O—(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted at one or more carbon atoms by from 1 to 3 substituents independently selected from halo, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
each R2 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
each R3 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
n is selected from 0 to 4; and
m is selected from 0 to 3.
In an embodiment of the invention, the compound of formula XXXI has the formula XXXVa:
or a pharmaceutically acceptable salt thereof, wherein:
R12 is selected from the group consisting of C1-C6 alkyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, —(C1-C6 alkyl)-O—(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted at one or more carbon atoms by from 1 to 3 substituents independently selected from halo, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl.
In another embodiment of the invention, the rho kinase inhibitor has the XXXVI:
or a pharmaceutically acceptable salt thereof, wherein:
R13 and R14 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C3-C7 cycloalkyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R13 and R14 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, C3-C7 cycloalkyl, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
R16 and R17 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R16 and R17 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
each R2 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
each R3 is independently selected from the group consisting of lower alkyl, CN, halo, hydroxy, lower alkoxy, amino, and perfluoro lower alkyl;
n is selected from 0 to 4; and
m is selected from 0 to 3.
In an embodiment of the invention, the compound of formula XXXVI has the formula XXXVIa:
or a pharmaceutically acceptable salt thereof, wherein:
R13 and R14 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), —(C1-C6 alkyl)-NR16R17, —(C1-C6 alkyl)-C(═O)NR16R17, aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C3-C7 cycloalkyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R13 and R14 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, C3-C7 cycloalkyl, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
R16 and R17 are independently selected from the group consisting of H, C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, —(C1-C6 alkyl)-O—(C1-C6 alkyl), aryl, aralkyl, heteroaryl, C3-C7 cycloalkyl, a three to twelve membered heterocyclic ring containing up to 3 heteroatoms, each of which may be optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, hydroxy, amino, cyano and C1-C3 perfluoro alkyl;
or R16 and R17 may be taken together to form a three to twelve membered heterocyclic ring having up to 3 heteroatoms which is optionally substituted by from 1 to 3 substituents independently selected from halo, C1-C6 alkyl, C2-C6 alkenyl, C1-C6 alkoxy, oxo, hydroxy, amino, cyano and C1-C3 perfluoro alkyl.
In further aspects of the invention, the compound of formula XXXI is SLx-2119:
In further aspects of the invention, the rho kinase inhibitor is selected from the group consisting of:
In further aspects of the invention, the rho kinase inhibitor is
The term “heteroatom” as used herein means an atom of any element other than carbon or hydrogen. Preferred heteroatoms are nitrogen, oxygen, and sulfur.
The term “alkyl” refers to the radical of saturated aliphatic groups, including straight-chain alkyl groups and branched-chain alkyl groups. In preferred embodiments, a straight chain or branched chain alkyl has 10 or fewer carbon atoms in its backbone (e.g., C1-C10 for straight chain, C3-C10 for branched chain). Likewise, preferred cycloalkyls have from 3-10 carbon atoms in their ring structure, and more preferably have 3 to 6 carbons in the ring structure.
Unless the number of carbons is otherwise specified, “lower alkyl” as used herein means an alkyl group, as defined above, but having from one to six carbons, and more preferably from one to four carbon atoms. Likewise, “lower alkenyl” and “lower alkynyl” have similar chain lengths (C2-C6). Preferred alkyl groups are lower alkyls. In preferred embodiments, a substituent designated herein as alkyl is a lower alkyl.
The term “cycloalkyl” refers to saturated, carbocyclic groups having from 3 to 7 carbons in the ring. Preferred cycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.
The term “aralkyl”, as used herein, refers to an alkyl group substituted with an aryl group (e.g., an aromatic or heteroaromatic group).
The terms “alkenyl” and “alkynyl” refer to unsaturated aliphatic groups analogous in length and possible substitution to the alkyls described above, but that contain at least one double or triple bond respectively.
The term “aryl” as used herein includes 5- and 6-membered single-ring aromatic groups that may include from zero to four heteroatoms, for example, benzene, pyrene, pyrrole, furan, thiophene, imidazole, oxazole, thiazole, triazole, pyrazole, pyridine, pyrazine, pyridazine and pyrimidine, and the like. Those aryl groups having heteroatoms in the ring structure may also be referred to as “aryl heterocycles”, “heteroaromatics” or “heteroaryl”. The aromatic ring can be substituted at one or more ring positions with such substituents as described above, for example, halogen, azide, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, alkoxyl, amino, nitro, sulfhydryl, imino, amido, phosphonate, phosphinate, carbonyl, carboxyl, silyl, ether, alkylthio, sulfonyl, sulfonamido, ketone, aldehyde, ester, heterocyclyl, aromatic or heteroaromatic moieties, —CF3, —CN, or the like. The term “aryl” also includes polycyclic ring systems having two or more cyclic rings in which two or more carbons are common to two adjoining rings (the rings are “fused rings”) wherein at least one of the rings is aromatic, e.g., the other cyclic rings can be cycloalkyls, cycloalkenyls, aryls and/or heterocyclic groups.
The terms “heterocyclyl” or “heterocyclic group” refer to 3- to 10-membered ring structures, more preferably 5- or 6-membered rings, whose ring structures include one to four heteroatoms. Heterocycles can also be polycycles. Heterocyclic groups include, for example, thiophene, thianthrene, furan, pyran, isobenzofuran, chromene, xanthene, phenoxathiin, pyrrole, imidazole, pyrazole, isothiazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, indolizine, isoindole, indole, indazole, purine, quinolizine, isoquinoline, quinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, pteridine, carbazole, carboline, phenanthridine, acridine, pyrimidine, phenanthroline, phenazine, phenarsazine, phenothiazine, furazan, phenoxazine, pyrrolidine, oxolane, thiolane, oxazole, piperidine, piperazine, morpholine, lactones, lactams such as azetidinones and pyrrolidinones, sultams, sultones, and the like. The heterocyclic ring can be substituted at one or more positions with such substituents as described above, as for example, halogen, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, amino, nitro, sulfhydryl, imino, amido, phosphonate, phosphinate, carbonyl, carboxyl, silyl, ether, alkylthio, sulfonyl, ketone, aldehyde, ester, a heterocyclyl, an aromatic or heteroaromatic moiety, —CF3, —CN, or the like.
The terms “polycyclyl” or “polycyclic group” refer to two or more rings (e.g., cycloalkyls, cycloalkenyls, aryls and/or heterocyclyls) in which two or more carbons are common to two adjoining rings, e.g., the rings are “fused rings”. Rings that are joined through non-adjacent atoms are termed “bridged” rings. Each of the rings of the polycyclic group can be substituted with such substituents as described above, for example, halogen, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, amino, nitro, sulfhydryl, imino, amido, phosphonate, phosphinate, carbonyl, carboxyl, silyl, ether, alkylthio, sulfonyl, ketone, aldehyde, ester, a heterocyclyl, an aromatic or heteroaromatic moiety, —CF3, —CN, or the like.
As used herein, the term “nitro” means —NO2. The term “halogen” or “halo” designates —F, —Cl, —Br or —I. The term “hydroxyl” means —OH.
The terms “amine” and “amino” refer to both unsubstituted and substituted amines, e.g., a moiety that can be represented by the general formula:
wherein R, R′ and R″ each independently represent H, alkyl, alkenyl, alkynyl, aralkyl, aryl, and heterocyclic groups, and most preferably H or lower alkyl.
The terms “alkoxyl” or “alkoxy” as used herein refers to an alkyl group, as defined above, having an oxygen radical attached thereto. Representative alkoxyl groups include methoxy, ethoxy, propyloxy, tert-butoxy and the like. The term lower alkoxy refers to an alkoxy group having from 1 to 6 carbon atoms.
The term “oxo” as used herein refers to an oxygen atom that has a double bond to a another atom, particularly to carbon or sulfur.
As used herein, the definition of each expression, e.g. alkyl, m, n, R, etc., when it occurs more than once in any structure, is intended to be independent of its definition elsewhere in the same structure.
It will be understood that “substituted”, “substitution” or “substituted with” includes the implicit proviso that such substitution is in accordance with permitted valence of the substituted atom and the substituent, and that the substitution results in a stable compound, e.g., which does not spontaneously undergo transformation such as by rearrangement, cyclization, elimination, etc.
As used herein, the term “substituted” is contemplated to include all permissible substituents of organic compounds. In a broad aspect, the permissible substituents include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and non-aromatic substituents of organic compounds. Illustrative substituents include, for example, those described herein above.
Certain compounds of the present invention may exist in particular geometric or stereoisomeric forms. The present invention contemplates all such compounds, including cis- and trans-isomers, R- and S-enantiomers, diastereomers, the racemic mixtures thereof, and other mixtures thereof, as falling within the scope of the invention. Additional asymmetric carbon atoms may be present in a substituent such as an alkyl group. All such isomers, as well as mixtures thereof, are included in this invention.
Certain embodiments of the present compounds may contain a basic functional group, such as amino or alkylamino, and are, thus, capable of forming pharmaceutically-acceptable salts with pharmaceutically-acceptable acids. The term “pharmaceutically-acceptable salts” in this context, refers to the relatively non-toxic, inorganic and organic acid addition salts of compounds of the present invention. Representative salts include the hydrochloride, hydrobromide, sulfate, bisulfate, phosphate, nitrate, acetate, stearate, laurate, benzoate, lactate, phosphate, tosylate, citrate, maleate, fumarate, succinate, tartrate, napthylate, and mesylate salts and the like. (See, for example, Berge et al. “Pharmaceutical Salts”, J. Pharm. Sci. (1977) 66:1-19, which is incorporated by reference).
In other cases, the compounds of the present invention may contain one or more acidic functional groups and, thus, are capable of forming pharmaceutically-acceptable salts with pharmaceutically-acceptable bases. Representative salts include alkali or alkaline earth salts such as lithium, sodium, potassium, calcium, magnesium salts and the like. Representative organic amines useful for the formation of base addition salts include ethylamine, diethylamine, ethylenediamine, ethanolamine, diethanolamine, piperazine and the like. (See, for example, Berge et al., supra).
In one aspect, the present invention provides compounds of Formula I that are inhibitors of Rho-kinase. Rho kinase (ROCK), a serine/threonine kinase, serves as a target protein for small GTP-binding protein Rho, and is an important mediator of numerous cellular functions, including focal adhesions, motility, smooth muscle contraction, and cytokinesis. In smooth muscle, ROCK plays an important role in Ca2+ sensitization and the control of vascular tone. It modulates the level of phosphorylation of the myosin II light chain of myosin II, mainly through inhibition of myosin phosphatase, and contributes to agonist-induced Ca2+ sensitization in smooth muscle contraction.
Rho kinase is found in two forms, ROCK 1 (ROCKβ; p160-ROCK) and ROCK 2 (ROCKα). In some embodiments, the compound of Formula I is selectively inhibits ROCK1. In some embodiments, the compound of Formula I selectively inhibits ROCK2. In some embodiments, the compound of Formula I is non-selective with respect to inhibition of ROCK1 and ROCK2.
Methods of determining kinase inhibition are well known in the art. For example, kinase activity of an enzyme and the inhibitory capacity of a test compound can be determined by measuring enzyme specific phosphorylation of a substrate. Commercial assays and kits can be employed. For example, kinase inhibition can be determined using an IMAP® assay (Molecular Devices). This assay method involves the use of a fluorescently-tagged peptide substrate. Phosphorylation of the tagged peptide by a kinase of interest promotes binding of the peptide to a trivalent metal-based nanoparticle via the specific, high affinity interaction between the phospho-group and the trivalent metal. Proximity to the nanoparticle results in increased fluorescence polarization. Inhibition of the kinase by a kinase inhibitor prevents phosphorylation of the substrate and thereby limits binding of the fluorescently-tagged substrate to the nanoparticle. Such an assay can be compatible with a microwell assay format, allowing simultaneous determination of IC50 of multiple compounds.
In another aspect, the invention provides angiogenesis inhibitors for disease treatment. In certain embodiments, novel VEGFR2 antibodies or antigen binding fragments of such antibodies are employed, which are effective to inhibit VEGFR2-dependent signal transduction. As used herein, “inhibiting a receptor” means diminishing and/or inactivating the intrinsic kinase activity of the receptor to transduce a signal. A reliable assay for VEGFR2 inhibition is reduction of receptor phosphorylation.
The present invention is not limited by any particular mechanism of VEGFR2 inhibition. The mechanism followed by one antibody is not necessarily the same as that followed by another. Some possible mechanisms include preventing binding of the VEGF ligand to the extracellular binding domain of the VEGFR2, and preventing dimerization or oligomerization of receptors. Other mechanisms cannot, however, be ruled out.
Antibodies are proteins that recognize and bind to a specific antigen or substance. In preferred embodiments, the antibodies of the present invention bind KDR at least as strongly as the natural ligand. Affinity, represented by the equilibrium constant for the dissociation of an antigen with an antibody (Kd), measures the binding strength between an antigenic determinant and an antibody binding site. Avidity is the measure of the strength of binding between an antibody with its antigen. Avidity is related to both the affinity between an antigenic determinant and an antigen binding site on the antibody, and the number of binding sites (valence) per antibody. For example, a monovalent antibody has one binding site for a particular epitope. Typical values of K (the reciprocal of the dissociation constant Kd) are 105 to 1011 liters/mol. Any K weaker than 104 liters/mol is considered to indicate binding which is nonspecific.
Antibodies of the invention inhibit activation of VEGFR2. One measure of VEGFR2 inhibition is reduced tyrosine kinase activity of the receptor. Tyrosine kinase inhibition can be determined using well-known methods, such as measuring the autophosphorylation level of the receptor. Inhibition of VEGFR2 can also be observed through inhibition or regulation of phosphorylation events of natural or synthetic VEGFR2 substrates and other components of the VEGFR2 signal transduction pathway. Phosphorylation can be detected, for example, using an antibody specific for phosphotyrosine in an ELISA assay or on a western blot. Some assays for tyrosine kinase activity are described in Panek et al., J. Pharmacol. Exp. Thera., 283: 1433-44 (1997) and Batley et al., Life Sci., 62: 143-50 (1998).
In vivo assays can also be utilized. For example, receptor tyrosine kinase inhibition can be observed by mitogenic assays using cell lines stimulated with receptor ligand in the presence and absence of inhibitor. For example, HUVEC cells (ATCC) stimulated with VEGF can be used to assay VEGFR inhibition. Another method involves testing for inhibition of growth of VEGF-expressing tumor cells, using for example, human tumor cells injected into a mouse. See, U.S. Pat. No. 6,365,157 (Rockwell et al.).
The invention provides anti-VEGFR2 antibodies, including nucleic acids encoding such antibodies and compositions comprising such antibodies. In one embodiment the invention provides an isolated antibody heavy chain variable region comprising a CDR-1H, CDR-2H, and CDR-3H sequence, wherein:
(i) the CDR-1H sequence is GFTFSWYX1MX2 (SEQ ID NO:185), wherein X1 is V or I, X2 is G or L,
(ii) the CDR-2H sequence is SIX1X2SGGX3TX4YADSVKG (SEQ ID NO:186), wherein X1 is Y or G, X2 is P or S, X3 is A or F, X4 is N or D, and
(iii) the CDR-3H sequence is GNYFDY (SEQ ID NO:3) or GLAAPRS (SEQ ID NO:11).
In one embodiment, the invention provides an isolated light chain variable region comprising a CDR-L1, CDR-L2, and CDR-L3, wherein
(i) the CDR-L1 sequence is X1GX2X3LX4X5X6X7X8S (SEQ ID NO: 187), wherein X1 is S, Q, or T, X2 is D, E, or Q, X3 is K, S, N, I, or A, X4 is G or R, X5 is D, S, H, E, or N, X6 is E, Y, Q, R, or N, X7 is Y, F, or S, and X8 is A or S, or SGSX1SNX2X3X4X5X6X7X8 (SEQ ID NO: 188), wherein X1 is S, or T, X2 is I or L, X3 is E or G, X4 is T, S, or N, X5 is N or Y, X6 is T, P, A, or Y, X7 is V or L, and X8 is N, I, or Y, or X1GX2SX3DX4GX5YDYVS (SEQ ID NO: 189), wherein X1 is A or T, X2 is S or T, X3 is H, S, or N, X4 is I or V, and X5 is S or A,
(ii) the CDR-L2 sequence is X1X2X3X4X5PS (SEQ ID NO:190), wherein X1 is Q, D, T, Y, S, or A, X2 is D, N, S, T, or V, X3 is D, N, S, T, or Y, X4 is Q, K, N, or L, and X5 is R or L, and
(iii) wherein the CDR-L3 sequence is QX1WX2X3X4X5X6X7X8 (SEQ ID NO:191), wherein X1 is A or T, X2 is D or G, X3 is R or no amino acid, X4 is S, F, or N, X5 is S, T, or N, X6 is S, T, or P, X7 is A, V, L, I, or Y, and X8 is V or L, or AX1WDDX2LX3X4X5X6 (SEQ ID NO:192, wherein X1 is A, S, or T, X2 is N or S, X3 is N, I, or G, X4 is G or S, X5 is P, W, or V, and X6 is V or L, or MYSTITX1LL (SEQ ID NO:193), wherein X1 is A or T.
In one embodiment, the invention provides an isolated light chain variable region comprising a CDR-L1, CDR-L2, and CDR-L3, wherein
(i) the CDR-L1 sequence is RASX1X2X3X4X5X6X7YX5X9 (SEQ ID NO:194), wherein X1 is Q, E, or H, X2 is S, R, or N, X3 is V, I, or L, X4 is S, R, G or N, X5 is S or N, X6 is S, N, W, or D, X7 is G or no amino acid, X8 is L or F, and X9 is A, G, M, or S, (ii) the CDR-L2 sequence is GASX1RAT (SEQ ID NO:195), wherein X1 is S, T, I, or N, and
(iii) the CDR-L3 sequence is QQX1X2X3X4X5X6X7X8 (SEQ ID NO:196), wherein X1 is F or Y, X2 is D, G, or Y, X3 is S, T, or N, X4 is S, L, or W, X5 is P or no amino acid, X6 is P or T, X7 is L, I, V, P, W, or Y, and X8 is T or S.
In an embodiment of the invention, an antibody is provided which comprises a heavy chain variable domain comprising one, two, three, four, five, or six of the light chain variable domain and heavy chain variable domain CDR sequences set forth above.
Non-limiting examples of VEGFR2-binding antibody sequences are provided. As described herein, from human Fab phage display libraries, two neutralizing antibodies were identified that bind to human VEGFR2, block binding of the ligand VEGFA to hVEGFR2, and inhibit the VEGFR2 phosphorylation and downstream signal transduction stimulated by VEGFA. Table 1 indicates amino acid sequences of the CDRs and variable domains of antibodies of the antibodies. The Kds of Mab 101 and Mab 102 are about 6.6 mM and 1.7 nM, respectively.
The heavy chain of Mab 101 was reshuffled with κ light chain genes (K-library) and λ light chain genes (λ-library). 20 unique λ light chain variants were found by panning the λ-library against both human VEGFR2 and mouse VEGFR2. 22 unique κ light chain variants were found by panning the κ-library against both human VEGFR2 and mouse VEGFR2. Table 2 indicates amino acid sequences of the CDRs and variable domains of the light chains. The KDs of Mabs 105, 106, and 107 were increased about 10 fold (0.24 nM, 0.22 nM, and 0.12 nM, respectively).
The invention provides an isolated VEGFR2 antibody, and VEGFR2 binding fragments thereof, which comprises one, two, or three heavy chain CDRs and one, two, or three light chain CDRs, selected from the sequences set forth in Table 1 and Table 2. In an antibody of the invention, when more than one CDR is selected from the sequences presented in Table 1 and Table 2, the different CDRs need not be selected from the same monoclonal antibody presented in those tables, but can be selected from two or more antibody variable domains presented in the tables. Specific embodiments include, but are not limited to, the following. In an embodiment of the invention, the isolated VEGFR2 antibody comprises one, two, or three heavy chain CDRs having SEQ ID NO:1, SEQ ID NO:2, and SEQ ID NO:3. In an embodiment, of the invention, the antibody comprises one, two, or three light chain CDRs having SEQ ID NO:5, SEQ ID NO:6, and SEQ ID NO:7. In another embodiment, the antibody comprises one, two, or three light chain CDRs having sequences as set forth in Table 1 or 2. Non-limiting examples include a light chain variable region comprising one or more of SEQ ID NO:25, SEQ ID NO:26, and SEQ ID NO:27, one or more of SEQ ID NO:29, SEQ ID NO:30, and SEQ ID NO:31, or one or more of SEQ ID NO:33, SEQ ID NO:34, and SEQ ID NO:35. In certain embodiments, the VEGFR2 antibody comprises a heavy chain variable domain comprising SEQ ID NO:4 or SEQ ID NO: 12. In certain embodiments, the VEGFR2 antibody comprises a light chain variable domain comprising SEQ ID NO:8, SEQ ID NO:16, SEQ ID NO:27, SEQ ID NO:31, or SEQ ID NO:35. In certain embodiments, the antibodies comprise one of the above-mentioned heavy chain variable domains and one of the above-mentioned light chain variable domains. In certain embodiments, the VEGFR2 antibodies or binding fragments thereof comprise one or more CDRs or one or more variable domains with an amino acid sequence at least 85% at least 90%, at least 95%, at least 97%, at least 98%, or at least 99%, identical to the CDR and variable domain sequences set forth in Table 1 or 2.
“Identity” refers to the number or percentage of identical positions shared by two amino acid or nucleic acid sequences, taking into account the number of gaps, and the length of each gap, which need to be introduced for optimal alignment of the two sequences. “Substantially identical” means an amino acid sequence that which differs only by conservative amino acid substitutions, for example, substitution of one amino acid for another of the same class (e.g., valine for glycine, arginine for lysine, etc.) or by one or more non-conservative substitutions, deletions, or insertions located at positions of the amino acid sequence which do not destroy the function of the protein. Preferably, the amino acid sequence is at least 80%, more preferably at least 85%, and most preferably at least 90% similar to another amino acid sequence. Methods and computer programs for determining sequence similarity are publically available, including, but not limited to, the GCG program package (Devereux et al., Nucleic Acids Research 12: 387, 1984), BLASTP, BLASTN, FASTA (Altschul et al., J. Mol. Biol. 215:403 (1990), and the ALIGN program (version 2.0). The well-known Smith Waterman algorithm may also be used to determine similarity. The BLAST program is publicly available from NCBI and other sources (BLAST Manual, Altschul, et al., NCBI NLM NIH, Bethesda, Md. 20894; BLAST 2.0 at http://www.ncbi.nlm.nih.gov/blast/). In comparing sequences, these methods account for various substitutions, deletions, and other modifications. Conservative substitutions typically include substitutions within the following groups: glycine, alanine; valine, isoleucine, leucine; aspartic acid, glutamic acid, asparagine, glutamine; serine, threonine; lysine, arginine; and phenylalanine, tyrosine.
Certain embodiments of the invention involve the use of VEGFR2-binding antibody fragments. An Fv is the smallest fragment that contains a complete heavy and light chain variable domain, including all six hypervariable loops (CDRs). Lacking constant domains, the variable domains are noncovalently associated. The heavy and light chains may be connected into a single polypeptide chain (a “single-chain Fv” or “scFv”) using a linker that allows the VH and VL domains to associate to form an antigen binding site. In an embodiment of the invention, the linker is (Gly-Gly-Gly-Gly-Ser)3. Since scFv fragments lack the constant domains of whole antibodies, they are considerably smaller than whole antibodies. scFv fragments are also free of normal heavy-chain constant domain interactions with other biological molecules which may be undesired in certain embodiments.
Fragments of an antibody containing VH, VL, and optionally CL, CH1, or other constant domains can also be used. Monovalent fragments of antibodies generated by papain digestion are referred to as Fab and lack the heavy chain hinge region. Fragments generated by pepsin digestion, referred to as F(ab′)2, retain the heavy chain hinge and are divalent. Such fragments may also be recombinantly produced. Many other useful antigen-binding antibody fragments are known in the art, and include, without limitation, diabodies, triabodies, single domain antibodies, and other monovalent and multivalent forms.
The invention further provides multivalent antigen-binding proteins, which can be in the form, without limitation, of antibodies, antigen-binding fragments thereof, and proteins comprising all or part of antigen-binding portions of antibodies. Multivalent antigen-binding proteins may be monospecific, bispecific, or multispecific. The term specificity refers to the number of different types of antigenic determinants to which a particular molecule can bind. If an immunoglobulin molecule binds to only one type of antigenic determinant, the immunoglobulin molecule is monospecific. If the immunoglobulin molecule binds to different types of antigenic determinants then the immunoglobulin molecule is multispecific.
For example, a bispecific multivalent single chain antibody allows for the recognition of two different types of epitopes. Both epitopes may be on the same antigen (e.g., VEGFR2). Alternatively, one epitope may be on one antigen (e.g., VEGFR2), and the second epitope on a different antigen.
In one embodiment, a multivalent single chain antibody includes a variable light-chain fragment linked to a variable heavy-chain fragment (similar to an scFv), which is further linked by another peptide linker to at least one other antigen binding domain. Typically, the peptide linker is composed of about fifteen amino acid residues. In a preferred embodiment, the number of VL and VH domains is equivalent. For example, a bivalent single chain antibody can be represented as follows: VL-L1-VH-L2-VL-L3-VH or VL-L1-VH-L2-VH-L3-VL or VH-L1-VL-L2-VH-L3-VL or VH-L1-VL-L2-VL-L3-VH. Multivalent single chain antibodies which are trivalent or greater have one or more antibody fragments joined to a bivalent single chain antibody by additional peptide linkers. One example of a trivalent single chain antibody is: VL-L1-VH-L2-VL-L1-VH-L2-VL-LI-VH.
Two single chain antibodies can be combined to form a diabody, also known as bivalent dimer. Diabodies have two chains. Each chain of the diabody includes a VH domain connected to a VL domain by a short linker of about 5-10 amino acid residues, e.g. (Gly-Gly-Gly-Gly-Ser), (Gly-Gly-Gly-Gly-Ser)2. Such linkers are short enough to prevent intrachain pairing between domains on the same chain, thus driving interchain pairing between complementary domains on different chains and recreate two antigen-binding sites. The diabody structure is rigid and compact, with antigen-binding sites are at opposite ends of the molecule. Diabodies may be monospecfic or bispecific.
Three single chain antibodies can be combined to form a triabody, also known as a trivalent trimers. In some embodiments, triabodies are constructed with the carboxy terminus of a VL or VH domain directly fused to the amino terminus of a VH or VL domain, i.e., without any linker sequence. The triabody has three Fv heads with the polypeptides arranged in a cyclic, head-to-tail fashion. A possible conformation of the triabody molecule is planar with the three binding sites located in a plane at an angle of 120 degrees from one another. Triabodies may be monospecific, bispecific or trispecific.
It is understood that the anti-VEGFR2 antibodies of the invention, where used in a mammal for the purpose of prophylaxis or treatment, will be administered in the form of a composition additionally comprising a pharmaceutically acceptable carrier. Suitable pharmaceutically acceptable carriers include, for example, one or more of water, saline, phosphate buffered saline, dextrose, glycerol, ethanol and the like, as well as combinations thereof. Pharmaceutically acceptable carriers may further comprise minor amounts of auxiliary substances such as wetting or emulsifying agents, preservatives or buffers, which enhance the shelf life or effectiveness of the antibodies.
In the methods of the present invention, a therapeutically effective amount of an antibody of the invention is administered to a mammal in need thereof. The term “administering” as used herein means delivering the antibodies of the present invention to a mammal by any method that may achieve the result sought. They may be administered, for example, intravenously or intramuscularly. Although human antibodies of the invention are particularly useful for administration to humans, they may be administered to other mammals as well. The term “mammal” as used herein is intended to include, but is not limited to, humans, laboratory animals, domestic pets and farm animals. “Therapeutically effective amount” means an amount of antibody of the present invention that, when administered to a mammal, is effective in producing the desired therapeutic effect, such as inhibiting kinase activity.
Compounds of the invention can be advantageously administered with second agents to patients in need thereof. For example, in certain embodiments, a rho-kinase inhibitor of the invention is administered with an angiogenesis inhibitor. In certain embodiments, a VEGFR2 inhibitor is administered with an anti-inflammatory agent or an immunosuppressant. In certain embodiments, a VEGFR2 inhibitor is administered with an antineoplastic agent.
In certain embodiments a Rho-kinase inhibitor and an angiogenesis inhibitor are administered to a subject in need thereof. In certain embodiments, the Rho-kinase inhibitor is a compound of Formula I. In certain embodiments, the Rho kinase inhibitor is selective for ROCK1 over ROCK2. In certain embodiments, the Rho-kinase inhibitor is selective for ROCK2 over ROCK1. In some embodiments, the ROCK2 selective inhibitor is
Angiogenesis inhibitors include any substance that inhibits the growth of new blood vessels. For example, angiogenesis inhibitors include antagonists of VEGF, PlGF, and VEGF receptors, as well as the antibodies disclosed herein. By inhibitor is meant an inhibitor of a biological process or inhibitor of a target. In this regard, an angiogenesis inhibitor is an agent that reduces angiogenesis. A Rho-kinase inhibitor is an agent, such as a competitive inhibitor of ATP binding, that inhibits an activity or blocks an interaction of Rho-kinase. By antagonist is meant a substance that reduces or inhibits an activity or function in a cell associated with a target. For example, a VEGF antagonist reduces or blocks a function in a cell that is associated with VEGF. A VEGF antagonist may act on VEGF, by binding to VEGF and blocking binding to its receptors or may act on another cellular component involved in VEGF-mediated signal transduction. Similarly, a VEGFR2 antagonist is an agent that reduces or blocks VEGFR2-mediated signal transduction by binding to VEGFR2 and blocking ligand binding or interaction with a VEGFR2 substrate, or acts on another cellular component to reduce or block VEGFR2-mediated signal transduction. Thus, angiogenesis inhibitors include novel anti-VEGFR2 antibodies of the invention, and antagonists of, without limitation, VEGF, VEGFR1, VEGFR2, PDGF, PDGFR-β, neuropilin-1 (NRP1), and complement.
Antineoplastic agents include cytotoxic chemotherapeutic agents, targeted small molecules and biological molecules, and radiation. In certain embodiments of the invention, the anti-VEGFR2 antibodies of the invention are administered with irinotecan, etoposide, 5-fluorouracil, paclitaxel, or radiotherapy.
Anti-inflammatories and immunosuppressants include steroid drugs such as glucocorticoids (e.g., dexamethasone), FK506 (tacrolimus), ciclosporin, fingolimod, interferon, such as IFNβ or IFNγ, a tumor necrosis factor-alpha (TNF-α) binding protein such as infliximab (Remicade), etanercept (Enbrel), or adalimumab (Humira), and mycophenolic acid.
When a rho-kinase inhibitor is administered with a second agent, the rho-kinase inhibitor and the second agent can be adminstered sequentially or concomitantly. Sequentially means that one agent is administered for a time followed by administration of the second agent, which may be followed by administration of the first agent. When agents are administered sequentially, the level or one agent may not be maintained at a therapeutically effective level when the second agent is administered, and vice versa. Concomitantly means that the first and second agent are administered according to a schedule that maintains both agents at an substantially therapeutically effective level, even though the agents are not administered simultaneously. Each agent can be administered in single or multiple doses, and the doses can be administered on any schedule, including, without limitation, twice daily, daily, weekly, every two weeks, and monthly.
The invention also includes adjunctive administration. Adjunctive administration means that a second agent is administered to a patient in addition to a first agent that is already being administered to treat a disease or disease symptom. In some embodiments, adjunctive administration includes administering a second agent to a patient in which administration of the first agent did not treat, or did not sufficiently treat, the disease or disease symptom. In other embodiments, adjunctive administration includes administration of the second agent to a patient whose disease has been effectively treated by administration of the first agent.
Either agent can be administered adjunctively. In certain embodiments, a rho-kinase inhibitor is administered to a patient that is already receiving a second agent. In other embodiments, a second agent is administered to a patient that is already receiving a rho-kinase inhibitor. In some embodiments, a VEGF antagonist is administered with a second agent. In some embodiments, the effect of administering the first and second agents is synergistic. In some embodiments, administration of the first and second agents prevents or lengthens the time until relapse, compared to administration of either of the agents alone. In some embodiments, administration of the first and second agents allows for reduced dosage and/or frequency of administration of the first and second agent. In other embodiments, a second agent is administered to a patient that is already receiving the VEGF antagonist.
The invention provides methods and compounds for treating ocular disorders. In certain embodiments, the ocular disorder is characterized as having an angiogenic component. Excessive angiogenesis occurs in diseases such as cancer, diabetic blindness, age-related macular degeneration, rheumatoid arthritis, psoriasis, and more than 70 other conditions. In these conditions, new blood vessels feed diseased tissues, destroy normal tissues, and in the case of cancer, the new vessels allow tumor cells to escape into the circulation and lodge in other organs (tumor metastases). Excessive angiogenesis occurs when diseased cells produce abnormal amounts of angiogenic growth factors, overwhelming the effects of natural angiogenesis inhibitors. According to the invention, such disorders are treated by administering a Rho-kinase inhibitor, preferably a ROCK2 selective Rho-kinase inhibitor, and an angiogenesis inhibitor.
In one embodiment, the invention provides a method of treating age related macular degeneration (AMD), which occurs in “dry” and “wet” forms. The “wet” form of AMD causes vision loss due to abnormal blood vessel growth (neovascularization). Bleeding, leaking, and scarring from these retinal blood vessels eventually causes irreversible damage to the photoreceptors. The dry form results from atrophy of the retinal pigment epithelial layer, which causes vision loss through loss of photoreceptors (rods and cones) in the central part of the eye. In another embodiment, the invention provides a method of treating choroidal neovascularization (CNV). Choroidal neovascularization is a process in which new blood vessels grow in the choroid, through the Bruch membrane and invade the subretinal space, and is a symptom of, among other causes, age-related macular degeneration, myopia and ocular trauma. In another embodiment, the invention provides a method of treating diabetic macular edema (DME). In another embodiment, the invention provides a method of treating macular edema that is secondary to branch retinal vein occlusion (BRVO) or central retinal vein occlusion (CRVO). In other embodiments, the diseases to be treated include, without limitation, retinal neovascularization infectious and non-infectious, corneal neovascularization infectious and non-infectious, iris neovascularization, uveitis, neovascular glaucoma, and retinitis of prematurity (ROP). The method of treatment can be prophylactic, such as to stave off corneal neovascularization after corneal transplant, or to modulate the wound healing process in trabeculectomy surgery.
In one such embodiment, the disease or disorder is AMD, and a subject in need of treatment for AMD is administered an amount of a ROCK2 inhibitor effective to treat AMD. In another embodiment, the subject is administered a ROCK2 inhibitor and an angiogenesis inhibitor in amounts effective to treat AMD. In some embodiments, the angiogenesis inhibitor is a VEGFR2 antagonist. In certain such embodiments, the VEGFR2 antagonist binds to VEGF. In other such embodiments, the VEGFR2 antagonist binds to VEGFR2. Such VEGFR2-binding inhibitors include agents that bind to the extracellular domain of VEGFR2, including but not limited to antibodies and VEGFR2-binding fragments thereof, and agents that interact with the intracellular domain of VEGFR2 and block activation of VEGFR2-dependent signal transduction. VEGFR2 antagonists further include agents that interact with other cellular components to block VEGFR2-dependent signal transduction. In other embodiments of the invention, ocular diseases and disorders indicated above, are similarly treated.
According to the invention, a ROCK inhibitor and an angiogenesis inhibitor is administered to a subject in amounts effective amount to treat or preventing a pathologic condition characterized by excessive angiogenesis. Such conditions, involving for example, vascularization and/or inflammation, include atherosclerosis, rheumatoid arthritis (RA), hemangiomas, angiofibromas, and psoriasis. Other non-limiting examples of angiogenic disease are retinopathy of prematurity (retrolental fibroplastic), corneal graft rejection, corneal neovascularization related to complications of refractive surgery, corneal neovascularization related to contact lens complications, corneal neovascularization related to pterygium and recurrent pterygium, corneal ulcer disease, and non-specific ocular surface disease, insulin-dependent diabetes mellitus, multiple sclerosis, myasthenia gravis, Chron's disease, autoimmune nephritis, primary biliary cirrhosis, acute pancreatitis, allograph rejection, allergic inflammation, contact dermatitis and delayed hypersensitivity reactions, inflammatory bowel disease, septic shock, osteoporosis, osteoarthritis, cognition defects induced by neuronal inflammation, Osler-Weber syndrome, restenosis, and fungal, parasitic and viral infections, including cytomegaloviral infections.
Non-limiting examples of VEGF-binding agents include VEGF antibodies and VEGF traps (i.e., ligand binding domains of VEGF receptors. Two examples of antibodies (including VEGF-binding antibody fragments) are bevacizumab (Avastin), an antibody which binds to VEGF-A, and ranibizumab (Lucentis), an Fab derived from bevacizumab. In general, a VEGF trap is a protein that comprises VEGF binding domains of one or more VEGF receptor protein. VEGF-traps include, without limitation, soluble VEGFR-1, soluble neuropilin 1 (NRP1), soluble VEGFR-3 (which binds VEGF-C and VEGF-D), and aflibercept (Zaltrap; Eyelea; VEGF Trap R1R2), comprised of segments of the extracellular domains of human vascular endothelial growth factor receptors VEGFR1 and VEGFR2 fused to the constant region (Fc) of human IgG1. Conbercept (KH902) is a fusion protein which contains the extracellular domain 2 of VEGFR-1 (Flt-1) and extracellular domain 3, 4 of VEGFR-2 (KDR) fused to the Fc portion of human IgG1. Several VEGF traps containing KDR and FLT-1 Ig-like domains in various combinations are disclosed in U.S. Pat. No. 8,216,575. DARPins (an acronym for designed ankyrin repeat proteins) are genetically engineered antibody mimetic proteins typically exhibiting highly specific and high-affinity target protein binding. DARPin® MP0112 is a vascular endothelial growth factor (VEGF) inhibitor and has entered clinical trials for the treatment of wet macular degeneration and diabetic macular edema.
According to the invention, VEGF expression can be targeted. For example, VEGF inhibitor PTC299 targets VEGF post-transcriptionally by selectively binding the 5′- and 3′-untranslated regions (UTR) of VEGF messenger RNA (mRNA), thereby preventing translation of VEGF. Pegaptanib (Macugen) is an RNA aptamer directed against VEGF-165.
Non-limiting examples of agents that bind to the extracellular domain of VEGFR2 include the novel VEGFR2 antibodies and VEGFR2-binding fragments disclosed herein. Other examples are ramucirumab (IMC-1121B), IMC-1C11, and CDP791 (an engineered antibody fragment that comprises two antigen-binding fragments (di-Fab) of a humanized antibody covalently cross-linked at their hinge region and polyethylene glycol attached to the cross-linker.
Placental growth factor (PlGF) has been implicated in pathological angiogenesis. PlGF is structurally related to VEGF and is also a ligand for VEGFR-1. Consequently, VEGF traps comprising the extracellular domain of VEGFR1 (see above) are useful for targeting PlGF.
PDGF is composed of four polypeptide chains that form homodimers PDGF-AA, BB, CC, and DD as well as the heterodimer PDGF-AB. The PDGF receptors (PDGFR)-α and -β mediate PDGF functions. Specifically, PDGFRα binds to PDGF-AA, -BB, -AB, and -CC, whereas PDGFRβ interacts with -BB and -DD. Non-limiting examples of PDGF-binding agents include anti-PDGF antibodies and PDGF traps. Agents that target PDGF include Fovista™ (E10030, Ophthotech), a pegylated aptamer targeting PDGF-B, and AX102 (Sennino et al., 2007, Cancer Res. 75(15):7359-67), a DNA oligonucleotide aptamer that binds PDGF-B.
Agents that target PDGF receptors include ramucirumab (IMC-3G3, human IgG1) an anti-PDGFRα antibody, crenolanib (CP-868596), a selective inhibitor of PDGFRα (IC50=0.9 nM) and PDGFRβ (IC50=1.8 nM), and nilotinib (Tasigna®), an inhibitor of PDGFRα and PDGFRβ and other tyrosine kinases.
Angiogenesis inhibitors include intracellular agents that block signal transduction mediated by, for example, VEGF, PDGF, ligands of VEGF or PDGF receptors, or complement. Intracellular agents that inhibit angiogenesis inhibitors include the following, without limitation. Sunitinib (Sutent; SU11248) is a panspecific small-molecule inhibitor of VEGFR1-VEGFR3, PDGFRα and PDGFRβ, stem cell factor receptor (cKIT), Flt-3, and colony-stimulating factor-1 receptor (CSF-1R). Axitinib (AG013736; Inlyta) is another small molecule tyrosine kinase inhibitor that inhibits VEGFR-1-VEGFR-3, PDGFR, and cKIT. Cediranib (AZD2171) is an inhibitor of VEGFR-1-VEGFR-3, PDGFRβ, and cKIT. Sorafenib (Nexavar) is another small molecular inhibitor of several tyrosine protein kinases, including VEGFR, PDGFR, and Rafkinases. Pazopanib (Votrient; (GW786034) inhibits VEGFR-1, -2 and -3, cKIT and PDGFR. Foretinib (GSK1363089; XL880) inhibits VEGFR2 and MET. CP-547632 is as a potent inhibitor of the VEGFR-2 and basic fibroblast growth factor (FGF) kinases. E-3810 ((6-(7-((1-aminocyclopropyl) methoxy)-6-methoxyquinolin-4-yloxy)-N-methyl-1-naphthamide) inhibits VEGFR-1, -2, and -3 and FGFR-1 and -2 kinases in the nanomolar range. Brivanib (BMS-582664) is a VEGFR-2 inhibitor that also inhibits FGF receptor signaling. CT-322 (Adnectin) is a small protein based on a human fibronectin domain and binds to and inhibits activation of VEGFR2. Vandetanib (Caprelas; Zactima; ZD6474) is an inhibitor of VEGFR2, EGFR, and RET tyrosine kinases. X-82 (Xcovery) is a small molecule indolinone inhibitor of signaling through the growth factor receptors VEGFR and PDGFR.
In another embodiment, the ocular disease is glaucoma. There are several types of glaucoma which can be treated, including, without limitation, the following types. The two most common, primary open-angle glaucoma and acute angle-closure glaucoma are characterized by high ocular pressure. Pigmentary glaucoma, neovascular glaucoma, and congenital glaucoma also are characterized by reduced fluid outflow and high intraocular pressure (IOP). Normal tension glaucoma, is thought to be due to another mechanism, in particular poor blood flow to the optic nerve. Secondary glaucoma can result from injury, infection, inflammation, tumor or cataracts, and is also associated with prolonged use of steroids, systemic hypertension, diabetic retinopathy, and central retinal vein occlusion.
The invention provides a method of treating glaucoma which comprises administering to a patient in need thereof, an effective amount of a Rho-kinase inhibitor. In certain embodiments, the Rho-kinase inhibitor is a compound of any one of Formulae I-XXV. The Rho-kinase inhibitor can be non-selective with respect to ROCK1 and ROCK2, or can be a selective ROCK1 inhibitor, or a selective ROCK2 inhibitor. Generally, it is preferred that the inhibitor inhibits ROCK1, i.e., inhibits both ROCK1 and ROCK2 or is selective for ROCK1. In the context of this invention, selective means the inhibitor demonstrates an IC50 that is at least 2-fold, at least 5-fold, at least 10-fold, or at least 25-fold lower for one Rho kinase as compared to the IC50 for the other Rho kinase. As discussed above, there are several types glaucomas, compounds selective for ROCK1 or ROCK2 can be beneficial for treating certain types. Also, certain glaucomas having a neovascular component can benefit from administration of a angiogenesis inhibitor in addition to a ROCK inhibitor.
According to the invention, a ROCK2 inhibitor and the angiogenesis inhibitor can be administered to a subject in the same pharmaceutical composition or in separate pharmaceutical compositions. The agents may be administered to a subject by the same or different routes of administration.
In an embodiment of the invention, the ROCK2 inhibitor and the angiogenesis inhibitor are both small molecules and are administered orally. In a preferred embodiment, the agents are administered once daily. When the agents are administered on the same scheduled, the ROCK2 inhibitor and the angiogenesis inhibitor may be combined in the same dosage form so that they are coadministered.
In one embodiment of the invention, the angiogenesis inhibitor is an antibody or an antigen binding fragment thereof which is administered by injection, preferably intravitreal injection and the ROCK2 inhibitor is a small molecule administered orally. In one such embodiment, the angiogenesis inhibitor is administered weekly or once or twice per month and the ROCK2 inhibitor is administered daily.
In some of the treatment methods described herein, the invention includes administration of a TGF-β antagonist. TGF-β plays an important role in scarring, including, without limitation, retinal scarring associated with macular degeneration, detached retina, and surgical interventions for glaucoma. Of the three TGF-βs expressed in mammals, TGF-β2 is thought to be the most important isoform for retinal scarring, and there is a significant correlation between the levels of TGF-β2 expression and the severity of retinal scarring.
According to the invention, when a ROCK inhibitor, or a VEGF antagonist, or a ROCK inhibitor and a VEGF antagonist are administered to a subject to treat an ocular disease, a TGF-β antagonist can be administered to the subject to reduce or prevent scarring. For example, in an embodiment of the invention, when a ROCK inhibitor is administered to treat an ocular disorder, a TGF-β antagonist is also administered. In another embodiment, when a VEGF antagonist is administered to a subject to treat an ocular disorder, a TGF-β antagonist is also administered. In another embodiment of the invention, when a ROCK inhibitor and a VEGF antagonist are administered to a subject to treat an ocular disorder, a TGF-β antagonist is also administered. In ocular diseases involving neovascularization, leakage of new blood vessels is followed by scar formation (e.g., discaform scar). The invention includes administration of a TGF-β antagonist as well as a VEGF antagonist and a ROCK2 inhibitor to a subject to treat neovascularization in ocular disease.
Useful TGF-β antagonists include, without imitation, the following: (i) anti-TGF-β antibodies and antigen binding fragments thereof, such as pan-TGF-β antibody GC-1008 (Genzyme), anti-TGF-β1 antibody metelimumab (CAT-192) (Cambridge Antibody Technology), and antigen binding fragments of those antibodies, (ii) soluble TGF-β receptors or ligand binding fragments thereof, such as P144, a synthetic peptide encompassing amino acids 730-743 from the membraneproximal ligand-binding domain of TGF-β type III receptor (Esparza-López et al., 2001, J. Biol. Chem. 276(18):14588-96), and a type II TGF-β receptor—Fc (IgG1) fusion (Smith, J. et al., 1999, Circulation Res. 84:1212-22), (iii) peptides that bind to TGF-β receptors that block one or more isoforms of TGF-β, such as the 25 amino acid peptides from TGF-β1, TGF-β2, and TGF-β3 disclosed by Huang et al., 1997, J. Biol. Chem. 272:27155-59, that bind to TGF-β receptors, and (iv) antisense agents that inhibit TGF-β synthesis, such as trabedersen (Antisense Pharma GmbH), an oligonucleotide that inhibits the synthesis of TGF-β2. Additional antagonists are disclosed in WO2006/052568, WO 02/094833, WO 04/048382, WO 04/048381, WO 04/050659, WO 04/021989, WO 04/026871, and WO 04/026307.
Th17 cells are novel subset of helper CD4+ T cells that secrete IL-17, IL-21 and IL-22. The pro-inflammatory activity of Th17 cells can be beneficial to the host during infection, but uncontrolled Th17 function has been linked and actively involved in several autoimmune pathologies and development of acute graft-versus-host disease (GVHD), a disease characterized by selective epithelial damage to target organs that is mediated by mature T cells present in the stem cell or bone marrow inoculums. Indeed, high levels of IL-17 are detected in the sera and biopsies of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) patients which correlates with destruction of synovial tissue and disease activity. The pathological role of IL-17 in arthritic joints is associated with its stimulation of pro-inflammatory cytokine production and increased recruitment of T cells and innate immune cells. Moreover, numbers of Th17 cells are significantly increased in the peripheral blood of RA patients as well as elevated concentrations of IL-17 were seen in supernatants of their PBMCs after stimulation with anti-CD3/CD28 antibodies ex vivo. In addition, in multiple sclerosis (MS) patients, myelin reactive Th17 cells are also enriched and produce high amounts of IL-22 and IFN-γ. Further, a significant higher number of IL-17+ cells is detected in disease-affected gut areas compared to healthy areas of the same subjects with Crohn's disease (CD).
According to the invention, targeting Th17 (IL-17-secreting) cells by rho-kinase inhibition provides a method for treating Th17 cell-mediated diseases, including but not limited to autoimmune disorders such as RA, MS, SLE, Psoriasis, and Crohn's disease, and GVHD in humans. In an embodiment of the invention, the Rho-kinase inhibitor is a compound of Formula I. In some embodiments, the rho-kinase inhibitor inhibits ROCK1 and ROCK2. In some embodiments, the rho-kinase inhibitor selectively inhibits ROCK2. In some embodiments, selective inhibition of ROCK2 reduces or prevents toxicities associated with complete inhibition of ROCK activity.
The development and function of Th17 cells depends on activation of specific intracellular signaling pathways. The steroid receptor-type nuclear receptor RORγt is selectively expressed in Th17 cells and appears to be required for IL-17 production. The induction of RORγt has been observed to be mediated by IL-6, IL-21 and IL-23 via a STAT3-dependent mechanism. STAT3 also binds directly to the IL-17 and IL-21 promoters. In addition to RORγt and STAT3, the interferon regulatory factor 4 (IRF4) is required for the differentiation of Th17 cells since IRF4 KO mice failed to mount Th17 response and were resistant to development of autoimmune responses. Recent studies have demonstrated that phosphorylation of IRF4 by Rho-kinase 2 (ROCK2) regulates IL-17 and IL-21 production and development of autoimmunity in mice.
In certain embodiments, a dose of a compound or a composition is administered to a subject every day, every other day, every couple of days, every third day, once a week, twice a week, three times a week, or once every two weeks. In other embodiments, two, three or four doses of a compound or a composition is administered to a subject every day, every couple of days, every third day, once a week or once every two weeks. In some embodiments, a dose(s) of a compound or a composition is administered for 2 days, 3 days, 5 days, 7 days, 14 days, or 21 days. In certain embodiments, a dose of a compound or a composition is administered for 1 month, 1.5 months, 2 months, 2.5 months, 3 months, 4 months, 5 months, 6 months or more.
Methods of administration include but are not limited to parenteral, intradermal, intravitrial, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, epidural, oral, sublingual, intranasal, intracerebral, intravaginal, transdermal, transmucosal, rectally, by inhalation, or topically, particularly to the ears, nose, eyes, or skin. The mode of administration is left to the discretion of the practitioner. In most instances, administration will result in the release of a compound into the bloodstream. For treatment of ocular disease, intravitrial administration of biological agents is preferred.
In specific embodiments, it may be desirable to administer a compound locally. This may be achieved, for example, and not by way of limitation, by local infusion, topical application, by injection, by means of a catheter, or by means of an implant, said implant being of a porous, non-porous, or gelatinous material, including membranes, such as sialastic membranes, or fibers. In such instances, administration may selectively target a local tissue without substantial release of a compound into the bloodstream.
Pulmonary administration can also be employed, e.g., by use of an inhaler or nebulizer, and formulation with an aerosolizing agent, or via perfusion in a fluorocarbon or synthetic pulmonary surfactant. In certain embodiments, a compound is formulated as a suppository, with traditional binders and vehicles such as triglycerides.
In another embodiment, a compound is delivered in a vesicle, in particular a liposome (See Langer, 1990, Science 249:1527-1533; Treat et al., in Liposomes in the Therapy of Infectious Disease and Bacterial infection, Lopez-Berestein and Fidler (eds.), Liss, New York, pp. 353-365 (1989); Lopez Berestein, ibid., pp. 317-327; see generally ibid.).
In another embodiment, a compound is delivered in a controlled release system (See, e.g., Goodson, in Medical Applications of Controlled Release, supra, vol. 2, pp. 115-138 (1984)). Examples of controlled-release systems are discussed in the review by Langer, 1990, Science 249:1527-1533 may be used. In one embodiment, a pump may be used (See Langer, supra; Sefton, 1987, CRC Crit. Ref. Biomed. Eng. 14:201; Buchwald et al., 1980, Surgery 88:507; Saudek et al., 1989, N. Engl. J. Med. 321:574). In another embodiment, polymeric materials can be used (See Medical Applications of Controlled Release, Langer and Wise (eds.), CRC Pres., Boca Raton, Fla. (1974); Controlled Drug Bioavailability, Drug Product Design and Performance, Smolen and Ball (eds.), Wiley, New York (1984); Ranger and Peppas, 1983, J. Macromol. Sci. Rev. Macromol. Chem. 23:61; See also Levy et al., 1985, Science 228:190; During et al., 1989, Ann. Neurol. 25:351; Howard et al., 1989, J. Neurosurg. 71:105).
The above-described administration schedules are provided for illustrative purposes only and should not be considered limiting. A person of ordinary skill in the art will readily understand that all doses are within the scope of the invention.
It is to be understood and expected that variations in the principles of invention herein disclosed may be made by one skilled in the art and it is intended that such modifications are to be included within the scope of the present invention.
Throughout this application, various publications are referenced. These publications are hereby incorporated into this application by reference in their entireties to more fully describe the state of the art to which this invention pertains. The following examples further illustrate the invention, but should not be construed to limit the scope of the invention in any way.
Abbreviations used in the following examples and preparations include:
Mass spectrometry was conducted by: SynPep Co., 6905 Ct. Dublin, Calif. 94568, or it was recorded on an LC-MS: Waters 2695 Separations Module with a Waters ZQ2000 single quadrapole MS detector. Unless stated all mass spectrometry was run in ESI mode. 1H NMR spectra were recorded on a Varian 400 MHz machine using Mercury software. In sofar the synthesis of the following examples of compounds of the present inventation is not explicitely described in such example, the synthesis is as described herein in general terms and the appropriate starting material can be easily selected for synthesizing the compound of the example.
A solution of iso-propyl amine (5.0 g, 7.20 mL, 84.6 mmol) in 63 mL of DCM was cooled to −10° C. To this was added a solution of a-bromoacetylbromide (8.53 g, 3.68 mL, 42.3 mmol) in 10.5 mL of DCM. The reaction mixture was stirred for 10 min. The iso-propylammonium hydrobromide was filtered from the mixture and the filtrate then concentrated in vacuo to give the title compound as a white solid (5.30 g, 70%).
A mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (0.50 g, 2.27 mmol), 2-bromo-N-isoopropylacetamide (0.61 g, 3.41 mmol), and K2CO3 (0.47 g, 3.41 mmol) in DMF (3 mL) was stirred at rt followed by addition of ice water. The precipitate was filtered and washed with water and dried to provide the title compound (0.32 g, 44%).
A mixture of 2,4-dichloropyrimidine (1.99 g, 13.4 mmol), tert-butyl 5-amino-1H-indazole-1-carboxylate (3.4 g, 14.7 mmol), DIEA (3 mL), and DMF (13 mL) was stirred at 65° C. for 7 h, concentrated in vacuo, and titurated with Et2O. The precipitate was filtered and washed with IPA and dried to provide the title compound (1.83 g, 40%).
A mixture of tert-butyl 5-((2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.29 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (130 mg, 0.41 mmol), Pd(dppf)Cl2.CH2Cl2 (20 mg, 0.02 mmol), and K2CO3 (80 mg, 0.58 mmol) in dioxane/water (10 and 2 mL) was heated in microwave for 30 min. The reaction was worked up and purified by chromatography to provide the title compound (176 mg, 35%).
tert-Butyl 5-((2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate was taken up in 4 M HCl in dioxane and stirred at rt for 2 h. The volatiles were removed in vacuo to give the title compound as HCl salt. 1H NMR (400 MHz, DMSO-d6) δ12.6 (d, J=6.8 Hz, 6H), 3.93 (m, 1H), 4.51 (s, 2H), 6.75 (d, J=6 Hz, 1H), 7.14 (d, J=7.6 Hz, 1H), 7.44-7.59 (m, 3H), 7.87-7.91 (m, 3H), 8.09 (s, 1H), 8.18 (s, 1H), 8.31 (d, J=6.4 Hz, 1H), 10.19 (d, J=0.8 Hz, 1H), 13.10 (s, 1H). MS (ES+) m/e 403 (M+H)+.
A mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (4 g, 18.2 mmol), tert-butyl 2-bromoacetate (5.7 g, 27.3 mmol) and K2CO3 (3.44 g, 27.3 mmol) in CH3CN (100 mL) was stirred at 70° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and removed to give a residue. The residue was purified by column chromatograph to give the title compound (4g, 67%) as a white solid.
A mixture of compound 2,4-dichloropyrimidine (14.8 g, 0.1 mol), 1H-indazol-5-amine (14.6 g, 110 mmol) and Et3N (15 g, 150 mmol) in EtOH (200 mL) was stirred at 80° C. for 3 hrs. The reaction mixture was cooled and filtered. The filtered cake was collected and dried to give compound 5 (15 g, 60%) as a solid.
To a mixture of N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (7.35 g, 30 mmol), Boc2O (18.9 g, 90 mmol) in CH2Cl2 (150 mL) was added DMAP (3.6 g, 30 mmol) at 0° C. during 5 min. After 0.5 hr, the reaction was completed. The reaction mixture was washed with water, dried over Na2SO4 and removed to give a residue, which was purified by gel column chromatograph to give the title compound (6g, 67%) as a white solid.
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (4 g, 8.9 mmol), tert-butyl 2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetate (3.3 g, 10 mmol), KOAc (35 g, 360 mmol), Pd(dppf)2Cl2 (400 mg) and Boc2O (3.9 g, 18 mmol) in dioxane/water (10/1, 100 mL) was stirred at 100° C. for 3 days. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and removed to give a residue, which was purified by gel column chromatograph to give the title compound (3g, 54%) as a solid.
A mixture of compound tert-butyl 5-((2-(3-(2-(tert-butoxy)-2-oxoethoxy)phenyl)pyrimidin-4-yl)(tert-butoxycarbonyl)amino)-1H-indazole-1-carboxylate (2 g) and CF3COOH (20 mL) in DCM (20 mL) was stirred at 25° C. for 2 hrs. The solvent was removed to give the title compound (1.5 g) as a yellow solid.
A mixture of 2-(3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)phenoxy)acetic acid (600 mg, 1.66 mmol), 3-amino-pyrrolidine-1-carboxylic acid tert-butyl ester (300 mg, 1.62 mmol), HATU (760 mg, 2 mmol) and Et3N (250 mg, 2 mmol) in DMF (18 mL) was stirred at 25° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by HPLC to provide the title compound (300 mg, 50%) as a solid.
1H NMR (400 MHz, DMSO-d6) δ1.84-1.96 (m, 1H), 2.07-2.19 (m, 1H), 3.07-3.38 (m, 4H), 4.40-4.42 (m, 1H), 4.65 (s, 2H), 7.36 (d, J=6.4 Hz, 1H), 7.56 (t, J=8.0 Hz, 1H), 7.65 (d, J=8.0 Hz, 1H), 7.90-7.94 (m, 2H), 8.14-8.29 (m, 2H), 8.66 (d, J=6.8 Hz, 1H), 9.39-9.80 (m, 3H), 11.87 (s, 1H). MS (ES+) m/e 430 (M+H)+.
A mixture of compound 2-(3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)phenoxy)acetic acid (500 mg, 1.39 mmol), NH4Cl (125 mg, 2 mmol), HATU (720 mg, 1.89 mmol) and Et3N (200 mg, 2 mmol) in DMF (15 mL) was stirred at 25° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by HPLC to provide the title compound (60.1 mg, 12%) as a solid. 1H NMR (400 MHz, DMSO-d6) δ4.52 (s, 2H), 6.78 (d, J=6.4 Hz, 1H), 7.19 (dd, J=9.6 and 1.6 Hz, 1H), 7.40-7.62 (m, 5H), 7.84-7.87 (m, 2H), 8.11 (s, 1H), 8.15 (s, 1H), 8.33 (d, J=6.4 Hz, 1H), 10.35 (s, 1H). MS (ES+) m/e 361 (M+H)+.
A mixture of compound 2-(3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)phenoxy)acetic acid (500 mg, 1.39 mmol), thiomorpholine 1,1-dioxide (375 mg, 2.2 mmol), HATU (720 mg, 1.89 mmol) and Et3N (200 mg, 2 mmol) in DMF (15 mL) was stirred at 25° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by pre-HPLC to give the title compound (54.6 mg, 10%) as a solid. 1H NMR (400 MHz, DMSO-d6) δ3.11 (b, 2H), 3.30 (b, 2H), 3.85 (b, 4H), 5.00 (s, 2H), 6.76 (d, J=6.4 Hz, 1H), 6.91 (s, 1H), 7.09 (s, 1H), 7.16 (dd, J=8.0 and 2.4 Hz, 1H), 7.45 (t, J=8.0 Hz, 1H), 7.47-7.50 (m, 2H), 7.81 (s, 1H), 7.86 (d, J=8.0 Hz, 1H), 8.08 (s, 1H), 8.12 (b, 1H), 8.33 (d, J=6.4 Hz, 1H), 10.26 (s, 1H). MS (ES+) m/e 479 (M+H)+.
To a mixture of triphosgene (600 mg, 2 mmol) in THF (10 mL) was dropped a solution of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (836 mg, 4 mmol) and Et3N (1.2 g, 12 mmol) in THF (10 mL) during 10 min at 40° C. After 0.5 hr, morpholine (435 mg, 5 mmol) was added to the reaction mixture. After 15 min, the reaction mixture was quenched with saturated NH4Cl, extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by gel column chromatography to give the title compound (530 mg, 50%) as a white solid.
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (300 mg, 0.7 mmol), N-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)morpholine-4-carboxamide (250 mg, 0.8 mmol), CsF (510 mg, 3 mmol), Pd(PPh3)4 (120 mg) and Boc2O (432 mg, 2 mmol) in dioxane/water (10/1, 10 mL) was stirred at 130° C. under microwave for 20 min. Three pots were combined. The reaction mixture was diluted with water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by column chromatograph to give the title compound (360 mg).
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(morpholine-4-carboxamido)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (360 mg, crude) in MeOH/HCl (4M, 20 mL) was stirred at 25° C. overnight. The reaction mixture was concentrated to give title compound (68 mg) as an HCl salt. 1H NMR (400 MHz, DMSO-d6) δ3.49 (s, 4H), 3.62 (s, 4H), 7.14 (b, 1H), 7.50 (t, J=7.6 Hz, 1H), 7.60-7.65 (m, 3H), 7.88 (d, J=6.8 Hz, 1H), 8.22 (s, 1H), 8.28 (d, J=5.6 Hz, 1H), 8.46 (b, 1H), 8.68 (s, 1H), 9.00 (s, 1H), 11.77 (s, 1H). MS (ES+) m/e 416 (M+H)+.
A mixture of N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (3.7 g, 15 mmol), 3-methoxycarbonylphenylboronic acid (3.3 g, 18 mmol), K2CO3 (4.14 g, 30 mmol) and Pd(dppf)2Cl2 (700 mg) in dioxane/water (4/1, 75 mL) was stirred at 100° C. for 16 hrs. The reaction mixture was concentrated to give the title compound (7 g, crude) which was carried out directly for next step reaction without further purification.
To a mixture of methyl 3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)benzoate (7 g, crude) in dioxane (120 mL) was added NaOH (2M, 120 mL). The reaction mixture was refluxed for 1.5 h and was then cooled to rt and extracted with EtOAc (100 mL). The aqueous phase was separated and acidified with HCl (6M). The mixture was filtered and the filter cake was collected, dried to give the title compound (1.3 g, crude) used for the next step reaction directly.
To the mixture of 3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)benzoic acid (400 mg, 1.2 mmol), 4-aminotetrahydro-2H-thiopyran 1,1-dioxide (300 mg, 1.4 mmol), HATU (720 mg, 1.89 mmol) and Et3N (200 mg, 2 mmol) in DMF (15 mL) was stirred at 25° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by HPLC to give the title compound (81 mg, 20%) as a solid. 1H NMR (400 MHz, CD3OD) δ2.19-2.24 (m, 2H), 2.31-2.33 (m, 2H), 3.12-3.15 (m, 2H), 3.34-3.38 (m, 2H), 4.23-4.28 (m, 1H), 6.93 (d, J=6.8 Hz, 1H), 7.58-7.76 (m, 3H), 8.12 (s, 1H), 8.14 (s, 1H), 8.24 (d, J=7.2 Hz, 1H), 8.31 (d, J=8.0 Hz, 1H), 8.65 (s, 1H). MS (ES+) m/e 463 (M+H)+.
A mixture of 3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)benzoic acid (400 mg, 1.2 mmol), 4-amino-piperidine-1-carboxylic acid tert-butyl ester (300 mg, 1.5 mmol), HATU (720 mg, 1.89 mmol) and Et3N (200 mg, 2 mmol) in DMF (15 mL) was stirred at 25° C. overnight. The reaction mixture was poured into water and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated to give a residue, which was purified by HPLC to provide the title compound (200 mg, 30%) as a solid.
A mixture of tert-butyl 4-(3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)benzamido)piperidine-1-carboxylate (200 mg) in HCl in MeOH (5 mL) was stirred at 25° C. for 3 h. The solvent was removed to provide the title compound (150 mg) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ1.79-1.87 (m, 2H), 1.98-2.01 (m, 2H), 3.01-3.04 (m, 2H), 3.32-3.36 (m, 2H), 3.64-3.69 (m, 1H), 7.10-7.15 (m, 1H), 7.66 (d, J=8.0 Hz, 1H), 7.75 (t, J=8 Hz, 1H), 8.16 (s, 1H), 8.20 (s, 1H), 8.36 (d, J=6.8 Hz, 1H), 8.42 (d, J=7.6 Hz, 1H), 8.78 (d, J=7.2 Hz, 1H), 8.90 (s, 1H), 8.96 (s, 1H), 11.73 (s, 1H). MS (ES+) m/e 414 (M+H)+.
To a mixture of compound 2,4-dichloro-5-methylpyrimidine (5 g, 30.8 mmol) and 5-aminoindazole (4.1 g, 30.8 mmol) in anhydrous ethanol (100 mL) was added Na2CO3 (16 g, 154 mmol). The resulting mixture was heated at 80° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc. The organic phase was dried over anhydrous Na2SO4 and concentrated in vacuo followed by by column chromatography on silica gel (eluted with DCM:MeOH=50:1) to provide the title compound (7 g, yield 87%) as a brown solid.
To a solution of N-(2-chloro-5-methylpyrimidin-4-yl)-1H-indazol-5-amine (5 g, 19.3 mmol) in anhydrous DCM (100 mL) was added Boc2O (12.6 g, 57.9 mmol), TEA (5.85 g, 57.9 mmol) and DMAP (1.17 g, 9.56 mmol). The resulting mixture was stirred at room temperature for 4 h. The mixture was diluted with water and extracted with DCM. The organic phase was dried over anhydrous Na2SO4, and the solvent was removed in vacuo followed by purification by column chromatograph on silica gel (eluted with PE:EA=10:1) to give compound the title compound (5 g, yield 56%) as a white solid.
To a mixture of compound tert-butyl 5-((tert-butoxycarbonyl)(2-chloro-5-methylpyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (1.9 g, 4.14 mmol), compound N-cyclopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (1.57 g, 4.97 mmol) and CsF (1.89 g, 12.42 mmol) in 1,4-dioxane (20 mL) and water (5 mL) was added Pd(PPh3)4 (239 mg, 0.21 mmol). The resulting mixture was heated at 100° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=5:1) to provide the title compound (1.6 g, yield 62%) as a yellow solid.
To a solution of compound tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-(cyclopropylamino)-2-oxoethoxy)phenyl)-5-methylpyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (500 mg, 0.81 mmol) in EtOAc (2 mL) was added HCl/EtOAc (10 mL) and stirred at room temperature overnight. The formed precipitated was filtered and washed with EtOAc, dried in vacuo to afford the title compound (300 mg, yield 89%) as a yellow solid. 1H NMR (400 MHz, CD3OD) δ0.50-0.54 (m, 2H), 0.70-0.75 (m, 2H), 2.42 (s, 3H), 2.66-2.71 (m, 1H), 4.51 (s, 2H), 7.27 (dd, J=8.4 and 2.4 Hz, 1H), 7.49 (t, J=8.0 Hz, 1H), 7.64-7.68 (m, 2H), 7.72 (s, 1H), 8.04 (s, 2H), 8.20 (s, 1H), 8.28 (s, 1H). MS (ES+) m/e 451 (M+H)+.
To a mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloro-5-methylpyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (1.4 g, 3.05 mmol), tert-butyl 4-(2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamido)piperidine-1-carboxylate (1.68 g, 3.66 mmol) and CsF (1.39 g, 9.15 mmol) in 1,4-dioxane (20 mL) and water (5 mL) was added Pd(PPh3)4 (176 mg, 0.15 mmol). The resulting mixture was heated at 100° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=1:1) to afford the title compound (1.1 g, yield 47%) as a yellow solid.
To a solution of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-((1-(tert-butoxycarbonyl)piperidin-4-yl)amino)-2-oxoethoxy)phenyl)-5-methylpyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (700 mg, 0.92 mmol) in EtOAc (2 mL) was added HCl/EtOAc (10 mL) and stirred at room temperature overnight. The formed precipitated was filtered and washed with EtOAc, dried in vacuo to afford the title compound (230 mg, yield 54%) as a yellow solid. 1H NMR (400 MHz, CD3OD) δ1.73-1.84 (m, 2H), 2.01-2.05 (m, 2H), 2.42 (s, 3H), 3.02-3.09 (m, 2H), 3.39-3.43 (m, 2H), 3.99-4.05 (m, 1H), 4.57 (s, 2H), 7.30 (dd, J=8.4 and 2.4 Hz, 1H), 7.51 (t, J=8.4 Hz, 1H), 7.67-7.74 (m, 4H), 8.05 (s, 1H), 8.20 (s, 1H), 8.24 (s, 1H). MS (ES+) m/e 494 (M+H)+.
To a solution of 3-bromophenol (5 g, 28.9 mmol) in MeCN (100 mL) was added t-butyl bromoacetate (6.76 g, 34.7 mmol) and K2CO3 (5.98 g, 43.3 mmol). The resulting mixture was heated at 80° C. overnight under nitrogen. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc. The organic layer was washed with brine and dried over Na2SO4, filtrated and concentrated to give the residue, which was purified by column chromatography on silica gel (PE:EA=50:1) to give the title compound (7 g, yield 84%) as a oil liquid.
To a solution of tert-butyl 2-(3-bromophenoxyl)acetate (4.6 g, 16 mmol) in anhydrous DCM (50 mL) was added TFA (18 g, 0.16 mol) and stirred at room temperature overnight. After TLC showed the reaction was completed, the mixture was concentrated under reduced pressure to get a crude acid. The acid was dissolved in anhydrous DCM (50 mL), oxalyl chloride (2.44 g, 19.2 mmol) and DMF (0.2 mL) were added into the solution. The mixture was stirred at room temperature for 4 h. The mixture was concentrated under reduced pressure to provide a white solid, which was used for next step reaction without further purification.
To a solution of 2-(3-bromophenoxyl)acetyl chloride (2.3 g, 9.24 mmol) in anhydrous DCM (30 mL) was added triethylamine (2.8 g, 27.7 mmol) and cyclopropylamine (632 mg, 11.1 mmol) at 0° C. Then the resulting mixture was stirred at room temperature overnight. The reaction was diluted with water and extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=5:1) to give the title compound (1.95 g, yield 78%) as a white solid.
To a mixture of 2-(3-bromophenoxy)-N-cyclopropylacetamide (1.95 g, 7.25 mmol), bis(pinacolato)diboron (2.76 g, 10.87 mmol) and KOAc (2.13 g, 21.7 mmol) in DMSO (20 mL) was added Pd(dppf)Cl2-DCM (265 mg, 0.36 mmol). The resulting mixture was heated at 100° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=10:1) to provide the title compound (1.4 g, yield 60%) as a white solid.
To a solution of 2-(3-bromophenoxyl)acetyl chloride (2.1 g, 8.43 mmol) in anhydrous DCM (30 mL) was added triethylamine (2.56 g, 25.3 mmol) and 4-amino-1-Boc-piperidine (2.02 g, 10.1 mmol) at 0° C. Then the resulting mixture was stirred at room temperature overnight. The reaction was diluted with water and extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=5:1) to give the tile compound (2.8 g, yield 80%) as a white solid.
To a mixture of tert-butyl 4-(2-(3-bromophenoxyl)acetamido)piperidine-1-carboxylate (2.8 g, 6.79 mmol), bis(pinacolato)diboron (2.59 g, 10.2 mmol), and KOAc (1.99 g, 20.4 mmol) in DMSO (30 mL) was added Pd(dppf)Cl2-DCM (249 mg, 0.34 mmol). The resulting mixture was heated to 100° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=5:1) to provide the title compound (1.7 g, yield 54%) as a white solid.
To a mixture of 2,4-dichloropyrimidine (730 mg, 4.89 mmol) and 6-fluoro-5-aminoindazole (740 mg, 4.89 mmol) in anhydrous ethanol (15 mL) was added Na2CO3 (1.56 g, 14.7 mmol). The resulting mixture was heated at 80° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=3:1) to provide the title compound (750 mg, yield 58%) as a brown solid.
To a solution of N-(2-chloropyrimidin-4-yl)-6-fluoro-1H-indazol-5-amine (750 mg, 2.85 mmol) in anhydrous DCM (10 mL) was added Boc2O (1.86 g, 8.55 mmol), TEA (864 mg, 8.55 mmol) and DMAP (173 mg, 1.42 mmol). The resulting mixture was stirred at room temperature for 4 hrs. The mixture was diluted with water and extracted with DCM. The organic phase was dried over anhydrous Na2SO4, and the solvent was removed in vacuum to give a residue, which was purified by column chromatograph on silica gel (eluted with PE:EA=20:1) to give the title compound (800 g, yield 60%) as a white solid.
To a mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-6-fluoro-1H-indazole-1-carboxylate (920 mg, 1.98 mmol) in 1,4-dioxane (16 mL) and water (4 mL) was added N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (760 mg, 2.38 mmol), Pd(PPh3)4 (115 mg, 0.1 mmol) and CsF (906 mg, 5.96 mmol). The resulting mixture was heated at 100° C. overnight under N2. After cooling to room temperature, the mixture was diluted with water and extracted with EtOAc, the organic phase was dried over anhydrous Na2SO4 and concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=3:1) to provide the title compound (600 mg, yield 48%) as a yellow solid.
To a mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)pyrimidin-4-yl)amino)-6-fluoro-1H-indazole-1-carboxylate (520 mg, 0.84 mmol) in EtOAc (2 mL) was added HCl/EtOAc (10 mL) and stirred at room temperature overnight. The formed precipitate was filtered and washed with EtOAc, dried in vacuo to afford the title compound (200 mg, yield 56%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ1.04 (d, J=6.4 Hz, 6H), 3.88-3.93 (m, 1H), 4.51 (s, 2H), 7.00 (b, 1H), 7.22 (d, J=7.6 Hz, 1H), 7.49 (t, J=7.6 Hz, 1H), 7.56 (d, J=10.4 Hz, 1H), 7.75-7.79 (m, 2H), 7.93 (d, J=7.2 Hz, 1H), 8.09 (d, J=6.4 Hz, 1H), 8.16 (s, 1H), 8.36 (d, J=6.4 Hz, 1H), 11.09 (s, 1H). MS (ES+) m/e 457 (M+H)+.
To the mixture of 2,4-dichloro-5-methoxypyrimidine (3.56 g, 0.02 mol) in EtOH (80 mL) was added 1H-indazol-5-amine (2.66 g, 0.02 mol), and then DIEA (7.8 g, 0.06 mol). The resulting mixture was stirred at 45° C. overnight. The reaction mixture was cooled to room temperature and filtered. The cake was rinsed by MTBE and collected to give the title compound (4.4 g, yield 81%) as brown solid.
To the mixture of N-(2-chloro-5-methoxypyrimidin-4-yl)-1H-indazol-5-amine (4.2 g, 15.3 mmol) in DCM (50 mL) were added TEA (4.6 g, 45.9 mmol), (Boc)2O (8.32 g, 38.2 mmol), and DMAP (0.2 g). The resulting mixture was stirred at room temperature for 1 h and concentrated followed by purification by column chromatograph to provide the title compound (5.5 g, yield 76%) as light yellow solid.
To the solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloro-5-methoxypyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (1.5 g, 3.16 mmol) in the solvents (dioxane:water=10:1, 33 ml) were added N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) phenoxy)acetamide (1.2 g, 3.79 mmol), (Boc)2O (1.38 g, 6.32 mmol), CsF (1.4 g, 9.48 mmol), and then Pd(PPh3)4 (0.11 g, 0.095 mmol) under N2. The resulting mixture was stirred at 90° C. for 24 hrs. The mixture was purified by column chromatograph to give the title compound (0.98 g, yield 49%) as white solid.
The mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)-5-methoxypyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (1.2 g, 2 mmol) and pyridine hydrochloride (7.8 g) was stirred at 140° C. for 1 hr. The reaction cooled to room temperature. Water (20 mL) was added followed by NH3.H2O to adjust the pH to 6-7. The mixture was filtered. The cake was collected and dried to give the title compound (0.46 g, yield 55%) as gray solid.
To the mixture of 2-(3-(4-((1H-indazol-5-yl)amino)-5-hydroxypyrimidin-2-yl)phenoxy)-N-isopropylacetamide (450 mg, 1.07 mmol) in THF (45 mL) were added 2-(dimethylamino) ethanol (115 mg, 1.29 mmol), and then PPh3 (563 mg, 2.15 mmol) was added. The resulting mixture was stirred at room temperature for 0.5 hr. Then DEAD (374 mg, 2.15 mmol) was added. The resulting mixture was heated at reflux overnight. The solvent was removed under reduced pressure followed by addition of 10 mL EtOAc and 10 mL water. TFA was added to adjust pH=4-5. The aqueous solution was concentrated and purified by Prep HPLC to give the title compound (0.1 g, yield 10%) as yellow solid. 1H NMR (400 MHz, DMSO-d6) δ1.07 (d, J=6.4 Hz, 6H), 2.94 (d, J=4.0 Hz, 6H), 3.64-3.65 (m, 2H), 3.92-3.94 (m, 1H), 4.48 (s, 2H), 4.52-4.53 (m, 2H), 7.02 (dd, J=9.2 and 1.6 Hz, 1H), 7.37 (t, J=7.2 Hz, 1H), 7.60-7.89 (m, 5H), 8.12-8.19 (m, 3H), 8.90 (s, 1H), 9.60 (b, 1H). MS (ES+) m/e 490 (M+H)+.
A solution of 2,4,6-trichloropyrimidine (3.67 g, 20 mmol), 1H-indazol-5-amine (2.66 g, 20 mmol) and TEA (3.03 g, 30 mmol) in EtOH (75 mL) was heated at reflux overnight. After removing the solvent, the residue was re-crystallized in MeOH to provide the title compound (4.2 g, yield 50%) as a solid.
A solution of N-(2,6-dichloropyrimidin-4-yl)-1H-indazol-5-amine (4.2 g, 15 mmol), 1-methylpiperazine (2.0 g, 20 mmol) and TEA (3.03 g, 30 mmol) in MeOH (75 mL) was refluxed overnight. After removing the solvent, the residue was re-crystallized in DCM to give the title compound (3 g, yield 58%) as a solid.
To a solution of N-(2-chloro-6-(4-methylpiperazin-1-yl)pyrimidin-4-yl)-1H-indazol-5-amine (1.5 g, 4.4 mmol) in DCM (20 mL) were added TEA (0.93 g, 9.2 mmol), (Boc)2O (3 g, 13.9 mmol) and DMAP (1.1 g, 9.2 mmol). The resulting mixture was stirred at room temperature for 3 hrs. After removing the solvent, the residue was purified by column chromatography on silica gel (eluting with petroleum ether:ethyl acetate=50:1-10:1) to give the title (1.2 g, yield 50%) as a solid.
To a solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloro-6-(4-methylpiperazin-1-yl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (0.600 g, 1.1 mmol), Pd(dppf)Cl2 (50 mg), CsF (0.501 g, 3.3 mmol) and N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (0.640 g, 2 mmol) in dioxane/water (10:1, 10 mL) was stirred at 100° C. overnight. After removing the solvent, the residue was purified by HPLC to give the title compound (250 mg, yield 32%).
A solution of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)-6-(4-methylpiperazin-1-yl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (250 mg, 0.36 mmol) in DCM (10 mL) and TFA (3.0 mL) was stirred at room temperature for 3 hrs. The mixture was concentrated in vacuo to provide the title compound (150 mg, yield 70%) as a solid. 1H NMR (400 MHz, DMSO-d6) δ1.02 (d, J=6.4 Hz, 6H), 2.79 (s, 3H), 3.04 (b, 2H), 3.20-3.27 (m, 2H), 3.47-3.50 (m, 2H), 3.85-3.93 (m, 1H), 4.45 (s, 2H), 4.71-4.75 (m, 2H), 6.56 (s, 1H), 7.01 (dd, J=8.4 and 2.4 Hz, 1H), 7.36 (t, J=8.0 Hz, 1H), 7.41-7.52 (m, 4H), 7.88 (d, J=7.6 Hz, 1H), 7.98 (s, 2H), 9.53 (s, 1H), 10.00 (s, 1H). MS (ES+) m/e 501 (M+H)+.
A solution of 2,4-dichloropyrimidine (0.69 g, 4.6 mmol), 6-methyl-1H-indazol-5-ylamine hydrochloride (0.85 g, 4.6 mmol) and TEA (1.4 g, 13.8 mmol) in EtOH (16 mL) was heated at reflux overnight. The volatiles were removed to give the crude title compound (1.7 g), which was used for the next step reaction without purification.
To a solution of N-(2-chloropyrimidin-4-yl)-6-methyl-1H-indazol-5-amine (1.7 g, crude) in DCM (20 mL) were added TEA (0.93 g, 9.2 mmol), (Boc)2O (3 g, 13.9 mmol) and DMAP (1.1 g, 9.2 mmol). The resulting mixture was stirred at room temperature for 3 hrs. After removal of the solvent, the residue was purified by column chromatography on silica gel (eluting with petroleum ether:ethyl acetate=50:1-10:1) to give the title compound (0.45 g, yield 21.1% for 2 steps) as a solid.
A solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-6-methyl-1H-indazole-1-carboxylate (0.45 g, 1.67 mmol), Pd(dppf)Cl2 (50 mg), Na2CO3 (0.35 g, 3.34 mmol) and N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (0.64 g, 2 mmol) in dioxane/water (10:1, 10 mL) was stirred at 100° C. overnight. After removing the solvent, the residue was purified by HPLC to give the title compound (180 mg, yield 17%).
To a solution of tert-butyl 5-((tert-butoxycarbonyl)(2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)pyrimidin-4-yl)amino)-6-methyl-1H-indazole-1-carboxylate (180 mg, 0.29 mmol) in DCM (10 mL) was added TFA (1.5 mL) was added. The mixture was stirred at room temperature overnight and concentrated in vacuo to provide the title compound (170 mg, yield 96%). MS (ES+) m/e 417 (M+H)+.
To a solution of 2,4-dichloropyrimidine (1.0 g, 6.7 mmol) in EtOH (20 mL) was added (1H-Indazol-5-yl)-methyl-amine (1.0 g, 6.8 mmol) and TEA (2.02 g, 20 mmol). The resulting mixture was refluxed overnight. The solvent was removed to give the crude title compound (2.5 g), which was used for the next step reaction without purification.
To a solution of N-(2-chloropyrimidin-4-yl)-N-methyl-1H-indazol-5-amine (2.5 g, crude) in DCM (50 mL) were added TEA (2.0 g, 20 mmol), (Boc)2O (4.2 g, 19.2 mmol), and DMAP (1.0 g) was added. The resulting mixture was stirred at room temperature for 1 hr. The mixture was concentrated in vacuo and purified by column chromatograph to give the title compound (0.95 g, yield 38.8% for 2 steps) as a solid.
To a solution of tert-butyl 5-((2-chloropyrimidin-4-yl)(methyl)amino)-1H-indazole-1-carboxylate (0.6 g, 1.67 mmol) in the solvent (dioxane:water=4:1, 20 mL) were added N-isopropyl-2-[3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenoxy]-acetamide (0.6 g, 1.88 mmol), (Boc)2O (1.09 g, 5 mmol), K3PO4 (1.06 g, 5 mmol), t-Bu3P (0.4 g, 2 mmol) and Pd2(dba)3 (0.1 g) under N2. The resulting mixture was stirred at 100° C. for 24 hrs and concentrated in vacuo to provide the crude material which was carried out for the next step reaction without further purification.
To tert-butyl 5-((2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl)pyrimidin-4-yl)(methyl)amino)-1H-indazole-1-carboxylate as above was added HCl/MeOH (4M, 5 mL) and the mixture was stirred for 2.0 hr. The solvent was removed in vacuo and the residue was purified by HPLC to give the title compound (120 mg) as a TFA salt. 1H NMR (400 MHz, CD3OD) δ1.20 (d, J=6.8 Hz, 6H), 3.85 (s, 3H), 4.07-4.13 (m, 1H), 4.62 (s, 2H), 6.37-6.45 (m, 1H), 7.39 (dd, J=10.4 and 2.0 Hz, 1H), 7.43 (d, J=2.0 Hz, 1H), 7.60 (t, J=7.6 Hz, 1H), 7.79 (d, J=8.8 Hz, 1H), 7.86-7.89 (m, 2H), 7.91 (s, 1H), 8.05 (b, 1H), 8.18 (s, 1H). MS (ES+) m/e 417 (M+H)+.
The mixture of 2,4-dichloro-pyrimidine (200 mg, 2.41 mmol), 1H-pyrazol-4-ylamine (431 mg, 2.89 mmol), and TEA (730 mg, 7.23 mmol) in i-PrOH (8 mL) was stirred at 50° C. overnight. After cooling, the reaction mixture was concentrated. The crude product was used directly for the next step without purification.
To a mixture of (2-chloro-pyrimidin-4-yl)-(1H-pyrazol-4-yl)-amine (470 mg, 2.41 mmol), TEA (730 mg, 7.23 mmol) and DMAP (607 mg, 4.82 mmol) in dry DCM (15 mL), Boc2O (1040 mg, 4.82 mmol) was added slowly. The reaction mixture was stirred at room temperature for 3 h, and concentrated. The residue was purified by column chromatography on silica gel to give the title compound (200 mg, 0.5 mmol, 21% yield) as a white solid.
To a mixture of 4-[tert-butoxycarbonyl-(2-chloro-pyrimidin-4-yl)-amino]-pyrazole-1-carboxylic acid tert-butyl ester (118.5 mg, 0.3 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) phenoxy) acetamide (134 mg, 0.42 mmol), Na2CO3 (64 mg, 0.6 mmol), and Boc2O (130 mg, 0.6 mmol) in EtOH (3 mL) and H2O (0.3 mL), Pd(dppf)2Cl2 (21 mg, 0.03 mmol) was added. The mixture was stirred at 1300 under N2 protection under microwave for 30 minutes. After cooling, the mixture was concentrated. The residue was purified by flash column chromatograph on silica gel, and then purified by P-HPLC to give the title compound (30 mg, 0.066 mmol, 22% yield) as a white solid.
To a solution of tert-butyl 4-((2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl) pyrimidin-4-yl)amino)-1H-pyrazole-1-carboxylate (167 mg, 0.369 mmol) in DCM (20 mL) TFA (2 mL) was added. The mixture was stirred at room temperature for 5 hrs, and then concentrated to give the title compound (170 mg, 0.364 mmol, 98% yield) as a yellow solid. 1H NMR (400 MHz, CD3OD) δ 8.20-8.18 (d, J=7.2 Hz, 1H), 8.07 (s 2H), 7.80-7.78 (d, 2H), 7.64-7.60 (t, J=8.8 Hz, 1H), 7.40-7.40 (dd, J=9.6, 2.4 Hz, 1H), 6.91-6.89 (d, J=7.2 Hz, 1H), 4.63 (s, 2H), 4.13-4.09 (m, 1H) 1.18-1.16 (d, J=6.4 Hz 6H). MS (ES+) m/e 353 (M+H)+.
The mixture of 2,4-dichloro-pyrimidine (184 mg, 1.232 mmol), 1H-indazol-5-ol (150 mg, 1.12 mmol), and TEA (340 mg, 3.36 mmol) in EtOH (5 mL) was stirred at 800 overnight. After cooling, the reaction mixture was concentrated. The crude product was used directly for the next step without purification.
To a stirred mixture of 5-((2-chloropyrimidin-4-yl)oxy)-1H-indazole (275 mg, 1.12 mmol), TEA (340 mg, 3.36 mmol) and DMAP (28 mg, 0.224 mmol) in dry DCM (5 mL), Boc2O (484 mg, 2.24 mmol) was added slowly. The reaction mixture was stirred at room temperature for 2 hrs, and then concentrated. The residue was purified by column chromatography on silica gel to give the title compound (200 mg, 0.57 mmol, 50% yield) as a white solid.
To a mixture of tetr-butyl-5-((2-chloropyrimidin-4-yl)oxy)-1H-indazole-1-carboxylate (104 mg, 0.3 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl) phenoxy) acetamide (134 mg, 0.42 mmol), t-Bu3P (61 mg, 0.3 mmol), K3PO4.3H2O (160 mg, 0.6 mmol), and Boc2O (130 mg, 0.6 mmol) in dioxane (3 mL) and H2O (0.4 mL), Pd2(dba)3 (27 mg, 0.03 mmol) was added. The mixture was stirred at 800 under N2 protection overnight. After cooling, the mixture was concentrated. The residue was purified by reverse-phase HPLC to give the title compound (58 mg, 0.115 mmol, 38% yield) as a white solid.
The solution of tert-butyl 5-((2-(3-(2-(isopropylamino)-2-oxoethoxy)phenyl) pyrimidin-4-yl)oxy)-1H-indazole-1-carboxylate (340 mg, 0.675 mmol) HCl (g)/EtOAc (40 mL) was stirred at room temperature for 3 hrs, and then concentrated to provide the title compound (272 mg, 0.621 mmol, 92% yield) as a white solid. 1H NMR (400 MHz, CD3OD) δ 8.87-8.85 (d, J=6.4 Hz, 1H), 8.25 (s 1H), 7.78-7.71 (m, 2H), 7.69-7.65 (m, 2H), 7.50-7.43 (m, 3H), 7.30-727 (dd, J=8.0, 2.4 Hz, 1H), 4.48 (s, 2H), 4.06-4.00 (m, 1H), 1.14-1.12 (d, J=6.4 Hz 6H). MS (ES+) m/e 404 (M+H)+.
The title compound was prepared using essentially the same procedure described for example 12. 1H NMR (400 MHz, CD3OD) δ 3.24 (b, 4H), 3.82 (b, 4H), 5.00 (s, 2H), 6.93 (b, 1H), 7.33 (dd, J=7.6 and 1.6 Hz, 1H), 7.56 (t, J=8.4 Hz, 1H), 7.68 (d, J=8.4 Hz, 2H), 7.79 (b, 2H), 8.15 (s, 1H), 8.22 (d, J=7.2 Hz, 2H). (ES+) m/e 430 (M+H)+.
To a mixture of 4-amino-2,6-dichloropyrimidine (1.016 g, 6.72 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (2.032 g, 6.37 mmol) and CsF (2.858 g, 18.803 mmol) in 1,4-dioxane (31.2 mL) and H2O (6.3 mL) was added Pd(PPh3)4 (0.362 g, 0.313 mmol). The resulting mixture was stirred at 100° C. overnight under N2. After cooling to room temperature, the mixture was concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EtOAc=2:1) to obtain compound 2-(3-(4-amino-6-chloropyrimidin-2-yl)phenoxy)-N-isopropylacetamide (670 mg, yield 33%) as a white powder and 2-(3-(6-amino-2-chloropyrimidin-4-yl)phenoxy)-N-isopropylacetamide (460 mg, yield 22%) as a white powder.
To a solution of compound 2-(3-(4-amino-6-chloropyrimidin-2-yl)phenoxy)-N-isopropylacetamide (0.97 g, 3.031 mmol) in n-BuOH (15 mL) was added 1-methylpiperazine (1.5 g, 15 mmol) and stirred at 120° C. overnight under N2. After cooling to room temperature, the mixture was concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with EtOAc:MeOH=20:1) to obtain the title compound (460 mg, yield 39%) as a light yellow powder.
To a solution of compound 2-(3-(6-amino-2-chloropyrimidin-4-yl)phenoxy)-N-isopropylacetamide (0.436 g, 1.363 mmol) in n-BuOH (10 mL) was added 1-methylpiperazine (0.682 g, 6.815 mmol) and stirred at 120° C. overnight under N2. After cooling to room temperature, the mixture was concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with EtOAc:MeOH=20:1) to obtain the title compound (0.273 g, yield 52%) as a light yellow powder.
To a mixture of compound 2-(3-(4-amino-6-(4-methylpiperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (460 mg, 1.199 mmol), 4-iodopyridine (319.5 mg, 1.559 mmol), Pd2(dba)3 (109.8 mg, 0.12 mmol) and X-Phos (57 mg, 0.12 mmol) in anhydrous 1,4-dioxane (15 mL) was added Cs2CO3 (1.17 g, 3.3 mmol ). The resulting mixture was heated to 120° C. overnight under N2. After cooling to room temperature, the mixture was diluted with 1,4-dioxane and filtered through celite pad. The filtrate was concentrated and the residue was washed with EtOAc and dried in vacuo to obtain the title compound (173 mg, yield 31.3%) as a white solid. 1H NMR (400 MHz, CD3OD) δ 1.17 (d, J=6.4 Hz, 6H), 2.36 (s, 3H), 2.55 (t, J=5.2 Hz, 4H), 3.72 (t, J=4.8 Hz, 4H), 4.06-4.16 (m, 1H), 4.56 (s, 2H), 5.97 (s, 1H), 7.19 (dd, J=8.0 and 2.4 Hz, 1H), 7.39 (t, J=8.0 Hz, 1H), 7.78 (d, J=6.4 Hz, 2H), 7.98 (s, 1H), 8.02 (d, J=8.0 Hz, 1H), 8.32 (d, J=5.6 Hz, 1H). m/e 462 (M+H)+.
To a mixture of compound 2-(3-(6-amino-2-(4-methylpiperazin-1-yl)pyrimidin-4-yl)phenoxy)-N-isopropylacetamide (493 mg, 1.286 mmol), 4-iodopyridine (290 mg, 1.415 mmol), Pd2(dba)3 (117.8 mg, 0.129 mmol) and X-Phos (61.4 mg, 0.129 mmol) in anhydrous 1,4-dioxane (15 mL) was added Cs2CO3 (1258 mg, 3.858 mmol). The resulting mixture was heated to 120° C. overnight under N2. After cooling to room temperature, the mixture was diluted with 1,4-dioxane and filtered through celite pad. The filtrate was concentrated and the residue was washed with EtOAc and dried in vacuo to obtain the title compound (184 mg, yield 31.0%) as a white solid. 1H NMR (400 MHz, CD3OD) δ 1.17 (d, J=6.4 Hz, 6H), 2.36 (s, 3H), 2.57 (t, J=4.8 Hz, 4H), 3.65 (b, 4H), 4.08-4.14 (m, 1H), 4.54 (s, 2H), 6.57 (s, 1H), 7.08 (dd, J=8.0 and 2.4 Hz, 1H), 7.39 (t, J=8.4 Hz, 1H), 7.62 (d, J=7.6 Hz, 1H), 7.69-7.73 (m, 3H), 8.31 (d, J=6.4 Hz, 1H). m/e 462 (M+H)+.
A solution of tert-butyl 4-(hydroxymethyl)piperidine-1-carboxylate (1.5 g, 7.0 mmol), 3-bromophenol (1.5 g, 7.0 mmol) and PPh3 (2.7 g, 10.5 mmol) was stirred in dry THF (30 mL) was stirred at 0° C. under a nitrogen atmosphere. To this mixture was added DEAD (1.8 g, 10.5 mmol) dropwise over a period of 5 min, and the reaction was monitored by TLC. After complete disappearance of the starting material, the solvent was evaporated under reduced pressure and the resulting oil purified by column chromatography (PE/EA, 9/1) to provide the title compound (2.4 g crude) which was used directly without further purification. m/e 372 (M+H)+.
A solution of tert-butyl 4-((3-bromophenoxy)methyl)piperidine-1-carboxylate (2.4 g, 6.5 mmol), Pin2B2 (2.5 g, 9.7 mmol), Pd(dppf)Cl2 (250 mg) and potassium acetate (1.9 g, 19.4 mmol) in 50 mL of dioxane was degassed and flushed with N2, heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (300 L), filtered, concentrated and was purified by chromatography (EA:PE, 1:10) to give the title compound (600 mg, 22%) as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.38 (1H, m), 7.27 (2H, m), 6.96 (1H, m), 3.82 (2H, d, J=6.0 Hz), 2.76 (1H, m), 1.73 (4H, m), 1.84 (4H, m).
A mixture of tert-butyl 5-(tert-butoxycarbonyl(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (642 mg, 1.44 mmol), tert-butyl 4-((3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl) piperidine-1-carboxylate (600 mg, 1.44 mmol), KOAc (564 mg, 5.76 mmol), Boc2O (604 mg, 2.88 mmol) and Pd(dppf)Cl2 (70 mg) in dioxane/water (30 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (PE/EA, 5/1) to give the title compound (300 mg, crude) as a yellow oil. m/e 701 (M+H)+.
tert-Butyl-5-(tert-butoxycarbonyl(2-(3-((1-(tert-butoxycarbonyl)piperidin-4-yl) methoxy)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (250 mg, 0.36 mmol) was dissolved in 30 mL HCl/Et2O (saturated). It was stirred at room temperature over night. The mixture was concentrated to give a residue, which was diluted with water, and extracted by EA. The water phase was adjusted to 11 using saturated NaHCO3 solution. It was concentrated and the residue was further purified by preparative TLC to provide the title compound as a yellow solid (50 mg, 35%). 1H NMR (300 MHz, CD3OD) δ 8.24 (2H, m), 8.04 (1H, s), 7.90 (2H, m), 7.56 (2H, m), 7.38 (1H, t, J=6.0 Hz), 7.04 (1H, dd, J=9.0 Hz, J=3.0 Hz), 6.65 (1H, d, J=6.0 Hz), 3.95 (2H, d, J=6.0 Hz), 3.42 (2H, d, J=3.0 Hz), 2.15 (2H, t, J=3.0 Hz), 2.12 (1H, m), 2.07 (2H, q, J=3.0 Hz), 1.69 (2H, q, J=3.0 Hz); m/e 401 (M+H)+.
A solution of tert-butyl 4-hydroxypiperidine-1-carboxylate (1.4 g, 7.0 mmol), 3-bromophenol (1.2 g, 7.0 mmol) and PPh3 (2.7 g, 10.4 mmol) was stirred in dry THF (35 mL) at 0° C. under a nitrogen atmosphere. To this mixture was added DEAD (1.8 g, 10.4 mmol) dropwise over a period of 5 min, and the reaction was monitored by TLC. After complete disappearance of starting material, the solvent was evaporated under reduced pressure and the resulting oil purified by column chromatography (PE/EA, 9/1) to provide the title compound (1.3 g, 52%). m/e 357 (M+H)+.
A solution of tert-butyl 4-(3-bromophenoxy) piperidine-1-carboxylate (1.3 g, 3.5 mmol), Pin2B2 (1.4 g, 5.3 mmol), Pd(dppf)Cl2 (135 mg) and potassium acetate (1.0 g, 10.6 mmol) in 20 mL of dioxane was degassed, flushed with N2, and heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (200 mL), filtered, concentrated and purified by chromotography (EA:PE, 1:10) to give the title compound (500 mg, 36%) as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.38 (1H, m), 7.32 (1H, m), 7.27 (1H, m), 7.25 (1H, m), 7.38 (1H, m), 4.51 (1H, m), 3.69 (2H, m), 3.36 (2H, m), 1.88 (2H, m), 1.74 (2H, m), 1.34 (2H, m).
A mixture of tert-butyl 5-(tert-butoxycarbonyl(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (221 mg, 0.5 mmol), tert-butyl 4-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)piperidine-1-carboxylate (200 mg, 0.5 mmol), KOAc (196 mg, 2.0 mmol), Boc2O (210 mg, 1.0 mmol) and Pd(dppf)Cl2 (40 mg) in dioxane/water (30 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (PE/EA, 5/1) to provide the title compound (180 mg, crude) as a yellow oil. m/e 687 (M+H)+.
tert-Butyl-5-(tert-butoxycarbonyl(2-(3-(1-(tert-butoxycarbonyl)piperidin-4-yloxy)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (170 mg, 0.25 mmol) was dissolved in 30 mL HCl/Et2O (saturated). It was stirred at room temperature overnight. The mixture was concentrated to give a residue, which was diluted with water, and extracted by EA. The water phase was adjusted to 11 using saturated NaHCO3 solution. It was concentrated and the residue was further purified by preparative TLC to provide the title compound (20 mg, 21%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 8.26 (1H, d, J=6.0 Hz), 8.18 (1H, s), 8.04 (1H, s), 7.96 (1H, s), 7.93 (1H, t, J=3.0 Hz), 7.56 (2H, m), 7.42 (1H, t, J=9.0 Hz), 7.14 (1H, dd, J=9.0 Hz, J=3.0 Hz), 6.87 (1H, d, J=6.0 Hz), 5.80 (1H, m), 3.38 (2H, m), 3.30 (2H, m), 2.16 (2H, m), 2.11 (2H, m); m/e 387 (M+H)+.
A solution of 2-chloro-N-cyclopropylacetamide (1.7 g, 13.1 mmol), 3-bromo-4-fluorophenol (2.5 g, 13.1 mmol) and K2CO3 (2.7 g, 19.6 mmol) in 20 mL of acetone was heated at 60° C. for 16 h. The mixture was filtered and concentrated to give a residue, which was purified by column chromatography (PE/EA, 3/1) to give the title compound (2.5 g, 66%) as a yellow solid. m/e 289 (M+H)+.
A solution of 2-(3-bromo-4-fluorophenoxy)-N-cyclopropylacetamide (2.5 g, 8.7 mmol), Pin2B2 (3.3 g, 13.0 mmol), Pd(dppf)Cl2 (330 mg) and potassium acetate (2.6 g, 26.0 mmol) in 35 mL of dioxane was degassed and flushed with N2, heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (200 mL), filtered, concentrated and purified by chromatography (EA:PE, 1:5) to give the title compound (600 mg, 21%) as a yellow solid. m/e 336 (M+H)+.
A mixture of N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (150 mg, 0.61 mmol), N-cyclopropyl-2-(4-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (205 mg, 0.61 mmol), KOAc (240 mg, 2.45 mmol) and Pd(dppf)Cl2 (60 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (DCM/MeOH, 20/1) followed by further purification by preparative TLC to give the title compound (35 mg, 14%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 8.26 (1H, d, J=6.0 Hz), 8.17 (1H, s), 8.03 (1H, s), 7.52 (3H, m), 7.13 (2H, m), 6.70 (1H, d, J=6.0 Hz), 4.53 (2H, s), 2.72 (1H, t, J=3.0 Hz), 0.75 (2H, t, J=3.0 Hz), 0.57 (2H, t, J=3.0 Hz); m/e 419 (M+H)+.
A mixture of N-(2-chloro-5-methylpyrimidin-4-yl)-1H-indazol-5-amine (209 mg, 0.80 mmol), N-cyclopropyl-2-(4-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (270 mg, 0.80 mmol), KOAc (316 mg, 3.22 mmol) and Pd(dppf)Cl2 (60 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (DCM/MeOH, 20/1) followed by further purification by preparative TLC to give the title compound (35 mg, 10%) as a yellow solid.
1H NMR (300 MHz, CD3OD) δ 8.16 (1H, s), 8.12 (1H, s), 8.02 (1H, s), 7.70 (1H, dd, J=9.0 Hz, J=3.0 Hz), 7.54 (1H, d, J=9.0 Hz), 7.44 (1H, m), 7.10 (2H, m), 4.46 (2H, s), 2.69 (1H, m), 2.31 (3H, s), 0.73 (2H, t, J=3.0 Hz), 0.55 (2H, t, J=3.0 Hz); m/e 433 (M+H)+.
A solution of 2-chloro-N-cyclopropylacetamide (2.8 g, 20.9 mmol), 3-bromo-5-fluorophenol (4.0 g, 20.9 mmol) and K2CO3 (4.3 g, 31.4 mmol) in 40 mL of acetone was heated at 60° C. for 16 h. The mixture was filtered and concentrated to give a residue, which was purified by column chromatography (PE/EA, 3/1) to give the title compound (4.3 g, 71%) as a yellow solid. m/e 288 (M+H)+.
A solution of 2-(3-bromo-5-fluorophenoxy)-N-cyclopropylacetamide (4.3 g, 14.9 mmol), Pin2B2 (5.7 g, 22.4 mmol), Pd(dppf)Cl2 (600 mg) and potassium acetate (4.4 g, 44.8 mmol) in 50 mL of dioxane was degassed and flushed with N2, heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (200 mL), filtered, concentrated and purified by chromatography (EA:PE, 1:5) to give the title compound (3.2 g, 64%) as a yellow solid. m/e 336 (M+H)+.
A mixture of N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (340 mg, 1.4 mmol), N-cyclopropyl-2-(3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (650 mg, 1.9 mmol), CsF (835 mg, 5.5 mmol) and Pd(dppf)Cl2 (200 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (DCM/MeOH, 20/1) to give the title compound (80 mg, 14%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 8.26 (1H, d, J=6.0 Hz), 8.08 (1H, s), 8.06 (1H, s), 7.78 (1H, s), 7.65 (1H, dd, J=9.0 Hz, J=3.0 Hz), 7.58 (2H, s), 6.89 (1H, dt, J=9.0 Hz, J=3.0 Hz), 6.66 (1H, d, J=6.0 Hz), 4.58 (2H, s), 2.74 (1H, m), 0.76 (2H, t, J=3.0 Hz), 0.58 (2H, t, J=3.0 Hz); m/e 419 (M+H)+.
A mixture of N-(2-chloro-5-methylpyrimidin-4-yl)-1H-indazol-5-amine (360 mg, 1.4 mmol), N-cyclopropyl-2-(3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (650 mg, 1.9 mmol), CsF (835 mg, 5.5 mmol) and Pd(dppf)Cl2 (200 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 16 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (DCM/MeOH, 20/1) to give the title compound (60 mg, 10%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 8.14 (1H, s), 8.04 (2H, m), 7.70 (2H, m), 7.57 (2H, m), 6.81 (1H, dt, J=9.0 Hz, J=3.0 Hz), 4.51 (2H, s), 2.72 (1H, m), 2.29 (3H, s), 0.72 (2H, t, J=3.0 Hz), 0.57 (2H, t, J=3.0 Hz); m/e 433 (M+H)+.
A solution of tert-butyl 3-(hydroxymethyl)piperidine-1-carboxylate (935 mg, 4.35 mmol), 3-bromophenol (753 mg, 4.35 mmol) and PPh3 (1.71 mg, 6.53 mmol) was stirred in dry THF (30 mL) at 0° C. under a nitrogen atmosphere. To this mixture was added dropwise DEAD (1.14 g, 6.53 mmol) over a period of 5 min, and the reaction was monitored by TLC. After complete disappearance of starting material, the mixture was poured to EA (50 mL), washed with brine (3×20 mL), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (PE/EA, 10/1) to get the title compound (0.8 g, crude). m/e 370 (M+H)+.
A solution of tert-butyl 3-((3-bromophenoxy)methyl)piperidine-1-carboxylate (0.7 g, 1.9 mmol), Pin2B2 (0.72 g, 2.8 mmol), Pd(dppf)Cl2 (154 mg) and potassium acetate (556 mg, 5.67 mmol) in dioxane (50 mL) was degassed and flushed with N2, heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (100 mL), washed with brine (3×30 mL), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (EA:PE, 1:5) to give the title compound (0.9 g, crude). m/e 418 (M+H)+.
A mixture of tert-butyl 5-(tert-butoxycarbonyl(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (240 mg, 0.54 mmol), tert-butyl 3-((3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl) piperidine-1-carboxylate (270 mg, 0.65 mmol), CsF (788 mg, 5.4 mmol), Boc2O (353 mg, 1.62 mmol) and Pd(dppf)Cl2 (88 mg) in dioxane/water (20 mL/2 mL) was degassed and flushed with N2, heated at 100° C. for 16 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (100 mL), washed with brine (30 mL×3), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (DCM:MeOH, 50:1) to give the title compound (0.1 g) as a yellow oil. m/e 701 (M+H)+.
tert-Butyl-5-(tert-butoxycarbonyl(2-(3-((1-(tert-butoxycarbonyl)piperidin-3-yl) methoxy)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.14 mmol) was dissolved in HFIP (3 mL), the solution was stirred at 150° C. for 1 h with M.W. The mixture was concentrated to give a residue, which was purified by pre-TLC (DCM:MeOH, 4:1) to give the title compound as a yellow solid (40 mg, 70%). 1H NMR (400 MHz, CD3OD) δ 8.26 (d, J=8.4 Hz, 1H), 8.21 (s, 1H), 8.07 (s, 1H), 7.91-7.88 (m, 2H), 7.61-7.52 (m, 2H), 7.44 (t, J=8.0 Hz, 1H), 7.14-7.12 (m, 1H), 6.74 (d, J=6.4 Hz, 1H), 4.11-4.07 (m, 1H), 3.97-3.93 (m, 1H), 3.58-3.54 (m, 1H), 3.41-3.31 (m, 1H), 3.00-2.89 (m, 2H), 2.36-2.27 (m, 1H), 2.04-1.97 (m, 1H), 1.85-1.78 (m, 1H), 1.56-1.45 (m, 1H); m/e 401 (M+H)+.
A solution of tert-butyl 3-hydroxypyrrolidine-1-carboxylate (1.0 g, 5.8 mmol), 3-bromophenol (1.08 g, 5.8 mmol) and PPh3 (2.28 g, 8.7 mmol) in dry THF (35 mL) was stirred at 0° C. under a nitrogen atmosphere. To this mixture was added DEAD (1.51 g, 8.7 mmol) dropwise over a period of 5 min, and the reaction was monitored by TLC. After complete disappearance of starting material, the mixture was poured to EA (50 mL), washed with brine (20 mL×3), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (PE/EA, 10/1) to afford the title compound (0.8 g, crude). m/e 342 (M+H)+.
A solution of tert-butyl 3-(3-bromophenoxyl)pyrrolidine-1-carboxylate (0.8 g, 2.3 mmol), Pin2B2 (1.91 g, 7.5 mmol), Pd(dppf)Cl2 (408 mg) and potassium acetate (1.47 g, 15 mmol) in dioxane (50 mL) was degassed and flushed with N2, heated at 80° C. for 14 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (100 mL), washed with brine (3×30 mL), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (EA:PE, 1:5) to give the title compound as a yellow oil (450 mg, crude). m/e 390 (M+H)+.
A mixture of tert-butyl 5-(tert-butoxycarbonyl(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (466 mg, 1.05 mmol), tert-butyl 3-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)pyrrolidine-1-carboxylate (488 mg, 1.25 mmol), CsF (1.53 g, 10.5 mmol), Boc2O (687 mg, 3.15 mmol) and Pd(dppf)Cl2 (172 mg) in dioxane/water (30 mL/3 mL) was degassed and flushed with N2, heated at 100° C. for 16 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (100 mL), washed with brine (3×30 mL), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (PE/EA, 5/1) to give the title compound as a yellow solid (200 mg, 28.5%). m/e 673 (M+H)+.
tert-Butyl-5-(tert-butoxycarbonyl(2-(3-(1-(tert-butoxycarbonyl)pyrrolidin-3-yloxy)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (135 mg, 0.25 mmol) was dissolved in 2 mL of con. HCl. It was stirred for 5 minutes at room temperature. 10 mL of water was added and then adjust pH 9-10 by IN NaOH. Extracted with EA (30 mL×3), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by pre-TLC (DCM/MeOH, 5/1) to give the title compound as a yellow solid (45 mg, 62.5%). 1H NMR (400 MHz, CD3OD) δ 8.27 (d, J=6.0 Hz, 1H), 8.17 (s, 1H), 8.05 (s, 1H), 7.98 (d, J=7.6 Hz, 1H), 7.90-7.86 (m, 1H), 7.59-7.53 (m, 2H), 7.44 (t, J=8.0 Hz, 1H), 7.11 (dd, J=2.0 Hz, J=2.4 Hz, 1H), 6.67 (d, J=6.0 Hz, 1H), 5.28-5.26 (m, 1H), 3.62-3.31 (m, 4H), 2.40-2.25 (m, 2H); m/e 373 (M+H)+.
A solution of 2-chloro-N-cyclopropylacetamide (1.0 g, 7.5 mmol), 5-bromo-2-fluorophenol (1.44 g, 7.5 mmol) and K2CO3 (1.55 g, 11.25 mmol) in 30 mL of acetone was heated at 60° C. for 16 h. The mixture was filtered and concentrated to give a residue, which was purified by column chromatography (PE/EA, 2/1) to give the title as a yellow solid (1.2 g, 55.3%). m/e 288 (M+H)+.
A solution of 2-(5-bromo-2-fluorophenoxy)-N-cyclopropylacetamide (0.83 g, 2.88 mmol), Pin2B2 (1.1 g, 4.33 mmol), Pd(dppf)Cl2 (120 mg) and potassium acetate (0.85 g, 8.64 mmol) in 35 mL of dioxane was degassed and flushed with N2, heated at 80° C. for 14 h.
The mixture was concentrated to give a residue, which was diluted with EtOAc (100 mL), washed with brine (3×30 mL), dried over Na2SO4 and filtered. The filtrate was evaporated under reduced pressure and the resulting oil was purified by column chromatography (PE/EA, 2/1) to give the title compound as an oil (600 mg, 21%). m/e 336 (M+H)+.
A mixture of N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (147 mg, 0.6 mmol), N-cyclopropyl-2-(2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (300 mg, 0.89 mmol), KOAc (235 mg, 2.4 mmol) and Pd(dppf)Cl2 (70 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. for 16 h. The mixture was concentrated to give a residue, which was diluted with DCM (30 mL) and filtered. The filtrate was concentrated and purified by column chromatography (DCM/MeOH, 10/1) to give the title compound as a yellow solid (35 mg, 14%). 1H NMR (400 MHz, DMSO) δ 13.01 (s, 1H), 9.65 (s, 1H), 8.33 (d, J=5.6 Hz, 1H), 8.21-8.20 (m, 1H), 8.09-7.96 (m, 3H), 7.62-7.55 (m, 2H), 7.39-7.34 (m, 1H), 6.68 (d, J=6.0 Hz, 1H), 4.64 (s, 2H), 2.70-2.65 (m, 1H), 0.63-0.59 (m, 2H), 0.48-0.43 (m, 2H); m/e 419 (M+H)+.
A mixture of N-(2-chloro-5-methylpyrimidin-4-yl)-1H-indazol-5-amine (100 mg, 0.38 mmol), N-cyclopropyl-2-(2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (130 mg, 0.38 mmol), KOAc (151 mg, 1.55 mmol) and Pd(dppf)Cl2 (50 mg) in dioxane/water (20 mL/3 mL) was degassed and flushed with N2, heated at 100° C. for 16 h. The mixture was concentrated to give a residue, which was diluted with DCM (30 mL) and filtered. The filtrate was concentrated and purified by column chromatography (DCM/MeOH, 10/1) to give the title compound as a yellow solid (10 mg, 2.9%). 1H NMR (400 MHz, DMSO) δ 13.01 (s, 1H), 8.62 (s, 1H), 8.21 (s, 1H), 8.17 (d, J=4.0 Hz, 1H), 8.11-8.09 (m, 2H), 7.97-7.94 (m, 1H), 7.85-7.82 (m, 1H), 7.71-7.68 (m, 1H), 7.59-7.56 (m, 1H), 7.31-7.26 (m, 1H), 4.58 (s, 2H), 2.68-2.63 (m, 1H), 2.25 (s, 3H), 0.66-0.58 (m, 2H), 0.47-0.43 (m, 2H); m/e 433 (M+H)+.
A mixture of N-(2,6-dichloropyrimidin-4-yl)-1H-indazol-5-amine (0.88 g, 3.17 mol), pyrrolidine (225 mg, 3.17 mmol) and DIPEA (818 mg, 6.34 mmol) in BuOH (30 mL) was stirred at 120° C. for 12 h. The mixture was concentrated to give a residue, which was purified by pre-HPLC to give the title compound as a white solid (0.8 g, 80%). m/e 315 (M+H)+.
A mixture of N-(6-chloro-2-(pyrrolidin-1-yl)pyrimidin-4-yl)-1H-indazol-5-amine (300 mg, 0.95 mmol), N-cyclopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (452 mg, 1.43 mmol), CsF (1.38 g, 1.55 mmol) and Pd(dppf)Cl2 (150 mg) in dioxane/water (30 mL/3 mL) was degassed and flushed with N2, heated at 100° C. for 16 h. The mixture was concentrated to give a residue, which was diluted with DCM (50 mL) and filtered. The filtrate was concentrated and purified by column chromatography (DCM/MeOH, 10/1) to give the title compound as a yellow solid (90 mg, 16%). m/e 570 (M+H)+.
tert-Butyl 5-(6-(3-(2-(cyclopropylamino)-2-oxoethoxy)phenyl)-2-(pyrrolidin-1-yl) pyrimidin-4-ylamino)-1H-indazole-1-carboxylate (90 mg, 0.16 mmol) was dissolved in HFIP (2 mL), the solution was stirred at 150° C. for 1 h with M.W. The mixture was concentrated to give a residue, which was purified by pre-TLC (DCM:MeOH, 4:1) to give the title compound as a yellow solid (35 mg, 46.7%). 1H NMR (400 MHz, DMSO) δ 12.92 (s, 1H), 9.27 (s, 1H), 8.32 (s, 1H), 8.19 (d, J=4.4 Hz, 1H), 7.99 (s, 1H), 7.60 (s, 1H), 7.56-7.47 (m, 3H), 7.39 (t, J=8.0 Hz, 1H), 7.02 (dd, J=2.0 Hz, J=2.0 Hz, 1H), 6.47 (s, 1H), 4.50 (s, 2H), 3.63-3.60 (m, 4H), 2.73-2.66 (m, 1H), 1.95-1.98 (m, 4H), 0.66-0.61 (m, 2H), 0.51-0.47 (m, 2H); m/e 470 (M+H)+.
3-(3-Bromophenyl) propanoic acid (3.0 g, 13.1 mmol) was added to a solution of SOCl2 (10 ml) and was stirred for 2 hours at 70° C. The mixture was concentrated under reduced pressure. The residue was dissolved in CH2C12 (20 ml), then was added dropwise into the mixture of cyclopropanamine (1.17 g, 19.6 mmol) and triethylamine (4.0 g, 39.3 mmol) at 0° C., then the reaction mixture was stirred overnight at ambient temperature. The reaction mixture was quenched with IN HCl and the organic layer was washed with brine, dried, concentrated to residue. The residue was purified by chromatography (PE/EA: 1/1 to 1/2) to give the title compound as white solid (2.8 g, 79%). 1H NMR (400 MHz, CDCl3) 67.36 (m, 2H), 7.15 (m, 2H), 5.53 (s, 1H), 2.94 (t, 2H), 2.68 (s, 1H), 2.41 (t, 2H), 0.77 (m, 2H), 0.44 (m, 2H). m/e 268 (M+H)+.
PdCl2(dppf) (420 mg, 0.5 mmol) was added into the mixture of 3-(3-bromophenyl)-N-cyclopropylpropanamide (2.8 g, 10.3 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (3.9 g, 15.5 mmol) and KOAc (2.5 g, 25.7 mmol) in dioxane (80 ml). The mixture was stirred overnight at 100° C. under nitrogen. The reaction mixture was then concentrated in vacuo, and the residue was purified by chromatography (PE/EA: 5/1 to 1/1) to give the title compound as an off-white solid (3.0 g, 92%). 1H NMR (300 MHz, CDCl3) δ 7.60-7.67 (m, 2H), 7.27-7.33 (m, 2H), 5.47 (s, 1H), 2.92-2.97 (m, 2H), 2.41 (t, 2H), 2.04 (s, 1H), 1.34 (s, 12H), 0.70-0.72 (m, 2H), 0.38-0.40 (m, 2H); m/e 316 (M+H)+.
PdCl2(dppf) (165 mg, 0.21 mmol) was added into the mixture of N-cyclopropyl-3-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)propanamide (380 mg, 1.2 mmol), Boc2O (650 mg, 3.0 mmol), CsF (600 mg, 4.0 mmol) and tert-butyl 5-(tert-butoxycarbonyl(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (446 mg, 1.0 mmol) in dioxane/H2O (30 ml, 10/1) under N2 flow. The mixture was stirred for 24 h at 100° C. under nitrogen. The reaction mixture was extracted with EA (60 ml) and washed with brine, dried, concentrated in vacuo, and the residue was purified by chromatography (PE/EA: 5/1 to 1/5) to give the title compound product (240 mg) as a yellow oil. m/e 599 (M+H)+.
tert-Butyl-5-(tert-butoxycarbonyl(2-(3-(3-(cyclopropylamino)-3-oxopropyl)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (220 mg, 0.367 mmol) was added to a mixture of saturated HCl in ethyl ether (30 mL). The mixture was stirred for 3 hours at ambient temperature. Then the mixture was filtered and the yellow solid was added to HCl (5 ml), then was stirred for 10 minutes and diluted with H2O (50 ml), filtered. The obtained off-white crystals as hydrochloride salt was added to saturated NaHCO3 (10 ml) and was stirred for 2 h. The mixture was filtered and the solid was washed with H2O (10 ml), dried to give the title compound (50 mg, 34%) as an off-white solid. 1H NMR (300 MHz, DMSO) δ13.00 (s, 1H), 9.62 (s, 1H), 8.34-8.32 (m, 3H), 8.22 (m, 1H), 8.06 (s, 1H), 7.85 (s, 1H), 7.55 (m, 1H), 7.40 (m, 3H), 6.66 (d, 1H), 2.90 (m, 2H), 2.60 (m, 1H), 2.40 (m, 2H), 0.57 (m, 2H), 0.33 (m, 2H). m/e 399 (M+H)+.
A solution of 2-chloro-N-cyclopropylacetamide (1.33 g, 10 mmol), 3-bromobenzenethiol (1.6 g, 8.5 mmol) and K2CO3 (4.8 g, 35 mmol) in 30 mL of acetone was heated at 70° C. overnight. The mixture was filtered and concentrated to give a residue, which was purified by column chromatography (PE/EA, 1/1) to give the title compound (2.4 g, 96%) as a white solid. 1H NMR 6 (300 MHz, CDCl3) 7.39 (1H, m), 7.31 (1H, m), 7.14 (2H, m), 6.71 (1H, s), 3.58 (2H, s), 2.64-2.77 (1H, m), 0.73-0.84 (2H, m), 0.41 (2H, m); m/e 286 (M+H)+.
A solution of 2-(3-bromophenylthio)-N-cyclopropylacetamide (2.43 g, 9.1 mmol), Pin2B2 (3.5 g, 13.7 mmol), Pd(dppf)Cl2 (730 mg) and potassium acetate (2.67 g, 27.3 mmol) in 30 mL of dioxane was degassed and flushed with N2, heated at 95° C. for 12 h. The mixture was concentrated to give a residue, which was diluted with EtOAc (200 mL), filtered, concentrated and purified by chromatography (EA:PE, 1:1) to give the title compound (2.4 g, 82%) as a yellow oil. m/e 286 (M+H)+.
A mixture of N-cyclopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenylthio)acetamide (380 mg, 1.1 mmol), N-(2-chloropyrimidin-4-yl)-1H-indazol-5-amine (246 mg, 1.0 mmol), CsF (730 mg, 5.0 mmol), Boc2O (650 mg, 3.0 mmol), and Pd(dppf)Cl2 (1700 mg) in dioxane/water (27 mL/3 mL) was degassed and flushed with N2, heated at 100° C. 24 h. The mixture was concentrated to give a residue, which was diluted with DCM, filtered, concentrated and purified by chromatography (DCM/MeOH, 20/1) to give the crude title compound (200 mg) as a yellow solid. m/e 617 (M+H)+.
A mixture of tert-butyl 5-(tert-butoxycarbonyl(2-(3-(2-(cyclopropylamino)-2-oxoethylthio)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (209 mg, 0.80 mmol) in con. HCl (3 mL) was stirred for 10 minutes followed by addition of ice. The reaction mixture was adjusted to pH 10 with NaHCO3 solution and extracted with CH2Cl2/MeOH (1/1, 20 ml). Filtered and the filtrate was concentrated to give a residue, which was purified by chromatography (DCM/MeOH, 20/1) followed by further purification by pre-TLC to give the title compound (25 mg, 18%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 8.36 (1H, m), 8.24 (1H, d, J=6 Hz), 8.14 (2H, m), 8.05 (1H, s), 7.56 (2H, s), 7.49 (1H, m), 7.41 (1H, d, J=6 Hz), 6.63 (1H, d, J=6 Hz), 3.60 (2H, s), 2.58 (1H, m), 0.61 (2H, m), 0.36 (2H, m); m/e 417 (M+H)+.
A mixture of 2-chloropyrimidin-4-amine (0.50 g, 3.8 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (1.46 g, 4.6 mmol), CsF (1.75 g, 11.4 mmol), and Pd(PPh3)4 (0.2 g, 0.2 mmol) in a mixture of dioxane (8 mL) and H2O (2 mL) was stirred at 100° C. overnight under N2. After cooling to room temperature, the mixture was concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EtOAc=1:1) to provide the title compound (400 mg, yield 36%) as colourless oil.
A mixture of compound 2-(3-(4-aminopyrimidin-2-yl)phenoxy)-N-isopropylacetamide
(300 mg, 1.1 mmol), 4-bromopyridine (258 mg, 1.3 mmol), Cs2CO3 (1026 mg, 3.3 mmol), Pd2(dba)3 (96 mg, 0.1 mmol), and X-Phos (51 mg, 0.1 mmol) in anhydrous dioxane (30 mL) was stirred at 120° C. overnight under N2. After cooling to room temperature, the mixture was filtered, the filtrate was concentrated, the residue was washed with EtOAc then was filtered to provide the title compound (200 mg, yield 52%) as white solid. 1H NMR (400 MHz, CD3OD) δ 10.09 (s, 1H), 8.47-7.92 (m, 8H), 7.45 (t, J=7.6 Hz, 1H), 7.12-6.82 (m, 2H), 4.52 (s, 2H), 3.99-3.92 (m, 1H), 1.06 (d, J=6.8 Hz, 6H); m/e 364 (M+H)+.
2,4-Dichloropyrimide (745 mg, 5 mmol), 1,2,3,4,5,6-hexahydro-[4,4′]bipyridinyl (811 mg, 5 mmol), and TEA (758 mg, 7.5 mmol) in EtOH (15 mL) was stirred at reflux overnight. After removing the solvent, the residue was purified by column chromatography on silica gel (eluting with petroleum ether:ethyl acetate=5:1-1:1) to give the title compound (500 mg, yield 36.4%) as a white solid.
A mixture of 2-chloro-4-(4-(pyridin-4-yl)piperidin-1-yl)pyrimidine (500 mg, 1.82 mmol), Pd(dppf)2Cl2 (50 mg), Na2CO3 (579 mg, 5.46 mmol) and N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (871 mg, 2.73 mmol) in dioxane/water (10:1, 10 mL) was stirred at 100° C. overnight. After removing the solvent, the residue was purified by P-HPLC to give the title compound (300 mg, yield 35.2%) as a solid. 1H NMR (400 MHz, CD3OD) δ 8.80 (d, J=6.8 Hz, 2H), 8.23 (d, J=7.6 Hz, 1H), 8.10 (d, J=6.4 Hz, 2H), 7.83-7.81 (m, 2H), 7.59 (t, J=8.4 Hz, 1H), 7.37-7.20 (m, 2H), 5.54 (d, J=13.2 Hz, 1H), 4.62 (s, 2H), 4.52 (d, J=14 Hz, 1H), 4.12-4.06 (m, 1H), 3.61-3.47 (m, 4H), 2.26-1.89 (m, 4H), 1.17 (d, J=7.6 Hz, 6H); m/e 432 (M+H)+.
To a solution of compound 4,6-dichloropyrimidin-2-amine (39 g, 237.82 mmol) in CH3CN (300 mL), CH212 (1000 mL) was added then t-BuONO (129.3 g, 1.25 mol) was added and the mixture was heated to reflux overnight. The mixture was concentrated under reduced pressure and the residue was purified by column chromatography to give compound the title compound (30 g, yield 46%) as a yellow solid.
To a mixture of compound 4,6-dichloro-2-iodopyrimidine (13.92 g, 50.64 mmol), N-isopropyl-2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)acetamide (18 g, 56.39 mmol), Na2CO3 (13.88 g, 130.96) in DME (150 mL) and water (50 mL), Pd(PPh3)4 (5.04 g, 4.36 mmol) was added and the mixture was heated to reflux overnight under N2. Then the reaction mixture was poured into water (100 mL), extracted with EtOAc (150 mL×2) and the organic phase was washed by brine, dried with Na2SO4 and concentrated under reduced pressure and the residue was purified by column chromatography to give the title compound (9.05 g, yield 52%) as white solid.
To a solution of compound 2-(3-(4,6-dichloropyrimidin-2-yl)phenoxy)-N-isopropylacetamide (5.7 g, 16.75 mmol) in iPrOH (110 mL), DIPEA (6.5 g, 48.82 mmol) and 1H-indazol-5-amine (2.23 g, 17.25 mmol) were added and the reaction mixture was heated to reflux overnight. The reaction mixture was concentrated under reduced pressure and the residue was purified by column chromatography to give the title compound (3.22 g, yield 44%). 1H NMR (400 MHz, DMSO-d6) δ 13.05 (s, 1H), 9.90 (s, H), 8.09 (b, 2H), 7.95-7.89 (m, 3H), 7.59-7.41 (m, 3H), 7.12 (d, J=8.0 Hz, 1H), 6.66 (s, 1H), 4.51 (s, 2H), 4.00-3.94 (m, 1H), 1.08 (d, J=6.4 Hz, 6H); m/e 437 (M+H)+.
To a stirred solution of 2-(3-(4-((1H-indazol-5-yl)amino)-6-chloropyrimidin-2-yl)phenoxy)-N-isopropylacetamide (300 mg, 0.687 mmol) in iprOH (20 mL), Et3N (3 mL), and piperazine (592 mg, 6.87 mmol) were added at room temperature. The mixture was stirred overnight at 110° C. Then reaction mixture was concentrated under reduced pressure and the residue was purified by pre-HPLC to provide the title compound (114 mg, yield 34%). 1H NMR (400 MHz, DMSO-d6) δ 12.91 (s, 1H), 9.01 (s, 1H), 8.08 (s, 1H), 8.02 (s, 1H), 7.94-7.89 (m, 3H), 7.51-7.35 (m, 3H), 7.04 (dd, J=8.0 and 2.0 Hz, 1H), 5.82 (s, 1H), 4.50 (s, 2H), 3.98-3.92 (m, 1H), 3.48 (b, 4H), 2.76 (b, 4H), 1.07 (d, J=6.8 Hz, 6H); m/e 487 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (112 mg, yield 34%). 1H NMR (400 MHz, DMSO-d6) δ 12.93 (s, 1H), 9.09 (s, 1H), 8.08 (s, 1H), 8.03 (s, 1H), 7.95-7.91 (m, 3H), 7.49-7.38 (m, 3H), 7.05 (d, J=8.0 Hz, 1H), 5.84 (s, 1H), 4.50 (s, 2H), 3.94 (b, 1H), 3.69 (s, 4H), 3.52 (s, 4H), 1.06 (d, J=6.8 Hz, 6H); m/e 488 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (100 mg, yield 65%). 1H NMR (400 MHz, DMSO-d6) δ 12.94 (s, 1H), 9.00 (s, 1H), 8.13 (s, 1H), 8.05 (s, 1H), 7.97-7.91 (m, 3H), 7.53-7.05 (m, 4H), 5.75 (s, 1H), 4.53 (s, 2H), 4.02-3.62 (m, 5H), 2.64 (b, 2H), 2.50 (b, 2H), 2.26 (s, 3H), 1.92 (b, 2H), 1.09 (d, J=6.8 Hz, 6H); m/e 515 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (110 mg, yield 32%). 1H NMR (400 MHz, DMSO-d6) δ 12.90 (s, 1H), 8.96 (s, 1H), 8.11 (s, 1H), 8.02 (s, 1H), 7.92-7.03 (m, 5H), 5.74 (s, 1H), 4.50 (s, 2H), 3.96-3.68 (m, 3H), 2.85 (b, 2H), 2.66 (b, 2H), 2.31 (b, 2H), 1.77 (b, 2H), 1.07 (d, J=6.8 Hz, 6H); m/e 501 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (101 mg, yield 33%). 1H NMR (400 MHz, DMSO-d6) δ 12.90 (s, 1H), 9.00 (s, 1H), 8.10 (s, 1H), 8.02 (s, 1H), 7.97-7.88 (m, 3H), 7.48 (s, 2H), 7.38 (t, J=8.0 Hz, 1H), 7.03 (d, J=7.2 Hz, 1H), 5.73 (s, 1H), 4.50 (s, 2H), 3.98-3.93 (m, 1H), 3.07 (s, 6H), 1.08 (d, J=6.8 Hz, 6H); m/e 446 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (110 mg, yield 33%). 1H NMR (400 MHz, DMSO-d6) δ 12.91 (s, 1H), 8.98 (s, 1H), 8.09 (s, 1H), 8.02 (s, 1H), 7.94-7.89 (m, 3H), 7.49-7.03 (m, 5H), 5.85 (s, 1H), 5.00 (s, 2H), 3.96-3.93 (m, 1H), 3.58 (b, 4H), 1.55 (b, 6H), 1.07 (d, J=6.8 Hz, 6H); m/e 486 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (110 mg, yield 33%). 1H NMR (400 MHz, DMSO-d6) δ 13.00 (s, 1H), 9.07 (s, 1H), 8.15 (s, 1H), 8.08 (s, 1H), 8.05-7.92 (m, 3H), 7.53 (s, 1H), 7.42 (t, J=8.0 Hz, 1H), 7.07 (d, J=7.6 Hz, 1H), 5.79 (s, 1H), 4.53 (s, 2H), 4.03-3.95 (m, 1H), 2.78 (b, 2H), 3.59-3.56 (m, 2H), 3.29 (s, 3H), 3.07 (s, 3H), 1.10 (d, J=6.8 Hz, 1H); m/e 490 (M+H)+.
The title compound was synthesized using the same procedure as that for 2-(3-(4-((1H-indazol-5-yl)amino)-6-(piperazin-1-yl)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (example 118) (100 mg, yield 29%). 1H NMR (400 MHz, DMSO-d6) δ 12.91 (s, 1H), 8.99 (s, 1H), 8.09 (s, 1H), 8.02 (s, 1H), 7.96-7.86 (m, 3H), 7.49-7.03 (m, 4H), 5.71 (s, 1H), 4.46 (s, 2H), 4.00-3.92 (m, 1H), 3.67 (b, 2H), 3.30 (b, 2H), 3.01 (s, 3H), 2.15 (s, 6H), 1.07 (d, J=6.8 Hz, 6H); m/e 503 (M+H)+.
To a solution of compound 2-(3-(4,6-dichloropyrimidin-2-yl)phenoxy)-N-isopropylacetamide (1 g, 2.9 mmol) in toluene (24 mL) were added NaOH (232 mg, 5.8 mmol) and 2-(dimthylamino)ethanol (261 mg, 2.9 mmol). The resulting mixture was stirred for 3 hrs at 110° C. Then the reaction mixture was diluted with water and extracted with DCM. The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by column chromatograph on silica gel (eluted with DCM:MeOH=100:1) to give compound the title compound (550 mg, yield 48%) as a solid.
To a solution of compound 2-(3-(4-chloro-6-(2-(dimethylamino)ethoxy)pyrimidin-2-yl)phenoxy)-N-isopropylacetamide (100 mg, 0.25 mmol) in EtOH (1 mL) were added 1H-indozal-5-amine (101.5 mg, 0.76 mmol) and TFA (0.25 mL). The resulting mixture was heated to 80° C. overnight. The mixture was concentrated and purified by chromatography on silica gel column and purified by Prep-TLC again to give the title compound (100 mg, yield 16%) as a light yellow solid. 1H NMR (400 MHz, MeOD) δ 8.05-7.96 (m, 4H), 7.54-7.49 (m, 2H), 7.40-7.08 (m, 2H), 5.94 (s, 1H), 4.55 (s, 4H), 4.14-4.06 (m, 1H), 2.79-2.76 (m, 2H), 2.33 (s, 6H), 1.16 (d, J=6.8 Hz, 6H); m/e 490 (M+H)+.
To a mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (500 mg, 2.27 mmol), DMAP (277.3 mg) and Et3N (450.46 mg, 4.54, mmol) in DCM (10 ml) was added dropwise a solution of morpholine-4-carbonyl chloride (339.5 mg, 2.27 mmol) in DCM (10 ml) at 0° C. Water was added to the mixture and extracted with DCM (40 mL×2). The organic phase was dried with Na2SO4 and concentrated under reduced pressure to give the title compound (600 mg, yield 79%) which was used to next step directly.
To a stirred solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.2243 mmol) in EtOH (3 mL) and H2O (0.3 ml) were added Na2CO3 (47.54 mg, 0.4485 mmol), (Boc)2O (93.29 mg, 0.4485 mmol) and 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl morpholine-4-carboxylate (149.44 mg, 0.4485 mmol) at room temperature. The mixture was degassed by budding nitrogen through the solution Pd(PPh3)2Cl2 (15.07 mg, 0.02243 mmol) was added and the mixture was heated under microwave irradiation for 20 minutes at 110° C. The mixture was dried and concentrated under reduced pressure and the residue was purified by column chromatograph on silica gel (DCM:MeOH=50:1) to give the title compound (50 mg, yield 53%). 1H NMR (400 MHz, DMSO-d6) δ 13.02 (s, 1H), 9.66 (s, 1H), 8.33-8.18 (m, 4H), 7.55-7.51 (m, 3H), 7.25 (d, J=8.0 Hz, 1H), 6.67 (d, J=5.6 Hz, 1H), 3.64 (b, 6H), 3.45 (b, 2H); m/e 417 (M+H)+.
To a mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (500 mg, 2.23 mmol), DMAP (277.4 mg) and Et3N (450.46 mg, 4.46, mmol) in DCM (15 mL) was added dropwise a solution of dimethylcarbamic chloride (238.6 mg, 2.23 mmol) in DCM (15 ml) at 0° C. and the reaction mixture was stirred overnight at room temperature. Water was added to the mixture and extracted with DCM (40 mL×2). The organic phase was dried with Na2SO4 and concentrated under reduced pressure to give the title compound (500 mg, yield 76%) which was used to next step directly.
To a stirred solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.2243 mmol) in EtOH (3 mL) and H2O (0.3 ml) was added Na2CO3 (47.54 mg, 0.4485 mmol), (Boc)2O (93.29 mg, 0.4485 mmol) and 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl dimethylcarbamate (130.58 mg, 0.4485 mmol) at room temperature. The mixture was degassed by budding nitrogen through the solution, Pd(PPh3)2Cl2 (15.07 mg, 0.02243 mmol) was added and the mixture was heated under microwave irradiation for 20 min at 110° C. The mixture was concentrated under reduced pressure and the residue was purified by column chromatograph on silica gel (DCM:MeOH=50:1) to give the title compound (30 mg, yield 37%). 1H NMR (400 MHz, DMSO-d6) δ 13.02 (s, 1H), 9.66 (s, 1H), 8.34-8.04 (m, 5H), 7.55-7.47 (m, 3H), 7.21 (d, J=8.0 Hz, 1H), 6.67 (d, J=5.6 Hz, 1H), 3.07 (s, 3H), 2.94 (s, 3H); m/e 375 (M+H)+.
To a solution of compound 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (1.5 g, 6.8 mmol) in DMF (20 mL) was added NaH (0.82 g, 20.4 mmol) potionwise at 0° C. with stirring. After 30 minutes, compound 3-(chloromethyl)pyridine hydrochloride (1.4 g, 8.9 mmol) was added portionwise at 0° C., and the resulting mixture was allowed to warm to 20° C. and stirred for 16 hrs. It was quenched with water, extracted with EtOAc (100 mL×3), and the extracts were washed with brine, dried over Na2SO4, concentrated under reduced pressure, and the residue was purified by chromatography on silica gel column (eluted with PE:EA=10:1 to 2:1) to give the title compound (1 g, yield 50%) as a white solid.
A mixture of compound 3-((3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)pyridine (1 g, 3.2 mmol), compound tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (670 mg, 1.5 mmol), K2CO3 (414 mg, 3 mmol) and Pd(dppf)2Cl2 (109 mg, 0.15 mmol) in dioxane (20 mL) and H2O (5 mL) was heated at 90° C. for 16 hrs under N2 atmosphere. Then it was concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) to give the title compound (370 mg, yield 50%) as a light red oil.
(370 mg, 0.75 mmol) in DCM (5 mL) was added TFA (5 mL), and the resulting solution was stirred at 20° C. for 3 hrs. It was concentrated and the residue was dissolved in DCM/MeOH (10:1, 100 mL), washed with aqueous K2CO3 and brine, dried over Na2SO4, concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) and recrystallized from MeOH to afford the title compound (110 mg, yield 37%) as a light yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 13.04 (s, 1H), 9.67 (s, 1H), 8.71 (s, 1H), 8.57 (s, 1H), 8.35 (d, J=5.6 Hz, 1H), 8.05 (s, 1H), 8.00-7.89 (m, 4H), 7.56-6.68 (m, 6H), 5.25 (s, 2H).
13.02 (s, 1H), 9.66 (s, 1H), 8.33-8.18 (m, 4H), 7.55-7.51 (m, 3H), 7.25 (d, J=8.0 Hz, 1H), 6.67 (d, J=5.6 Hz, 1H), 3.64 (b, 6H), 3.45 (b, 2H); m/e 417 (M+H)+.
To a solution of compound 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (1.5 g, 6.8 mmol) in DMF (20 mL) was added NaH (0.82 g, 20.4 mmol) potionwise at 0° C. with stirring. After 30 minutes, compound 4-(chloromethyl)pyridine (1.4 g, 8.9 mmol) was added portionwise at 0° C., and the resulting mixture was allowed to warm to 20° C. and stirred for 16 hrs. It was quenched with water, extracted with EtOAc (100 mL×3), and the extracts were washed with brine, dried over Na2SO4, concentrated, and the residue was purified by chromatography on silica gel column (eluted with PE:EA=10:1 to 2:1) to give the title compound (1 g, yield 50%) as a white solid.
A mixture of compound 4-((3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)pyridine (139 mg, 0.44 mmol) (6 batches), compound tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.22 mmol), Na2CO3 (47 mg, 0.44 mmol), Boc2O (96 mg, 0.44 mmol) and Pd(PPh3)2Cl2 (15.4 mg, 0.022 mmol) in EtOH (2 mL) and H2O (0.2 mL) was heated in microwave reactor at 110° C. for 20 minutes under N2 atmosphere. Then it was cooled, diluted with water, extracted with DCM, the extracts were concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) and recrystallized from MeOH to afford the title compound (110 mg, yield 23%) as a light yellow solid. 1H NMR (400 MHz, MeOD) δ 8.51 (d, J=5.6 Hz, 2H), 8.25 (d, J=6.0 Hz, 1H), 8.15 (s, 1H), 8.05-7.94 (m, 3H), 7.57-7.16 (m, 6H), 6.65 (d, J=6.0 Hz, 1H), 5.26 (s, 2H)); m/e 395 (M+H)+.
To a mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (800 mg, 3.636 mmol) in DCM (20 ml) were added KI (1.2 g, 7.273 mmol), K2CO3 (1.307 g 10.091 mmol) and 1-bromo-2-methoxyethane (1.01 g, 7.273 mmol) at room temperature. The mixture was stirred overnight at 80° C. The mixture was extracted with DCM (30 mL×2) and the organic phase was dried with Na2SO4 and concentrated under reduced pressure and the residue was purified by column chromatography to give the title compound (550 mg, yield 50%).
To a stirred solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.2243 mmol) in EtOH (3 mL) and H2O (0.3 ml) was added Na2CO3 (47.54 mg, 0.4485 mmol), (Boc)2O (93.29 mg, 0.4485 mmol) and 2-(3-(2-methoxyethoxyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (124.76 mg, 0.4485 mmol) at room temperature. The mixture was degassed by budding nitrogen through the solution, then Pd(PPh3)2Cl2 (15.07 mg, 0.02243 mmol) was added and the mixture was heated under microwave irradiation for 20 minutes at 110° C. The mixture was concentrated under reduced pressure and the residue was purified by column chromatograph on silica gel (DCM:MeOH=50:1) to give the title compound (40 mg, yield 49%). 1H NMR (400 MHz, DMSO-d6) δ 13.01 (s, 1H), 9.61 (s, 1H), 8.32 (d, J=5.6 Hz, 1H), 8.21 (s, 1H), 8.01-7.91 (m, 3H), 7.55-7.36 (m, 3H), 7.04 (d, J=7.6 Hz, 1H), 6.65 (d, J=5.6 Hz, 1H), 4.16 (b, 2H), 3.68 (b, 2H); m/e 362 (M+H)+.
To a stirred solution of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.2243 mmol) in EtOH (3 mL) and H2O (0.3 ml) were added Na2CO3 (47.54 mg, 0.4485 mmol), (Boc)2O (93.29 mg, 0.4485 mmol) and (3-methoxyphenyl)boronic acid (68.17 mg, 0.4485 mmol) at room temperature. The mixture was degassed by budding nitrogen through the solution, then Pd(PPh3)2Cl2 (15.07 mg, 0.02243 mmol) was added and the mixture was heated under microwave irradiation for 20 min at 110° C. The mixture was concentrated under reduced pressure and the residue was purified by column chromatograph on silica gel to give the title compound (80 mg, yield 85%).
To a stirred solution of tert-butyl 1H-indazol-5-yl(2-(3-methoxyphenyl)pyrimidin-4-yl)carbamate (1 g, 2.39 mmol) in DCM (20 mL) was added TFA (10 ml) at room temperature and the mixture was stirred overnight at room temperature. Then the mixture was concentrated under reduced pressure and the residue was purified by pre_HPLC to give the title compound (200 mg, yield 26%) as white solid. 1H NMR (400 MHz, DMSO-d6) δ 13.05 (s, 1H), 10.02 (s, 1H), 8.32 (d, J=6.0 Hz, 1H), 8.17 (s, 1H), 8.05 (s, 1H), 7.89-7.42 (m, 3H), 7.09 (d, J=7.6 Hz, 1H), 6.72 (d, J=6.0 Hz, 1H), 3.83 (s, 3H); m/e 318 (M+H)+.
To a solution of 3-bromophenol (7.8 g, 45.2 mmol) in DMF (120 mL) was added 4-(2-chloroethyl)morpholine (8.54 g, 45.2 mmol), K2CO3 (414 mg, 3 mmol) and KI (7.5 mg, 45.2 mmol), and the resulting mixture was heated at 20° C. and stirred for 16 hrs. It was quenched with water, extracted with EtOAc (200 mL×3), and the extracts were washed with brine, dried over Na2SO4, concentrated, and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) to give compound the title compound (7 g, yield 54%) as a red liquid.
A mixture of compound 4-(2-(3-bromophenoxyl)ethyl)morpholine (1.1 g, 3.8 mmol), BIPN (1.47 mg, 5.8 mmol), KOAc (0.83 mg, 8.5 mmol) and Pd(dppf)2Cl2 (0.28 mg, 0.38 mmol) in dioxane (15 mL) was heated at 90° C. for 16 hrs under N2 atmosphere. Then it was concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) to give compound the title compound (1 g, yield 78%) as a light red oil.
A mixture of compound 4-(2-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)ethyl)morpholine (1 g, 3.2 mmol), compound tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (670 mg, 1.5 mmol), K2CO3 (414 mg, 3 mmol) and Pd(dppf)2Cl2 (109 mg, 0.15 mmol) in dioxane (20 mL) and H2O (5 mL) was heated at 90° C. for 16 hrs under N2 atmosphere. Then it was concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=100:1 to 20:1) to give the tile compound (380 mg, yield 50%) as a light red oil.
To a solution of compound tert-butyl 1H-indazol-5-yl(2-(3-(2-morpholinoethoxyl)phenyl)pyrimidin-4-yl)carbamate (380 mg, 0.75 mmol) in DCM (5 mL) was added TFA (5 mL), and the resulting solution was stirred at 20° C. for 3 hrs. It was concentrated and the residue was dissolved in DCM/MeOH (10:1, 100 mL), washed with aqueous K2CO3 and brine, dried over Na2SO4, concentrated and the residue was purified by chromatography on silica gel column (eluted with DCM:MeOH=80:1 to 15:1) and recrystallized from EtOAc and PE to afford the tile compound (120 mg, yield 39%) as a light yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 13.04 (s, 1H), 9.65 (s, 1H), 8.36 (m, 3H), 8.08 (s, 1H), 7.94 (s, 1H), 7.57-7.38 (m, 3H), 7.06 (d, J=8.0 Hz, 1H), 6.68 (d, J=5.6 Hz, 1H), 4.17 (t, J=5.6 Hz, 2H), 3.58 (s, 4H), 2.73 (t, J=5.6 Hz, 2H), 2.67 (s, 4H); m/e 417 (M+H)+.
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (100 mg, 0.22 mmol), 3-acetylphenyl)boronic acid (73.7 mg, 0.44 mmol), Na2CO3 (47.6 mg, 0.44 mmol), (Boc)2O (98 mg, 0.44 mmol), Pd(PPh3)Cl2 (16 mg, 0.022 mmol) in EtOH:H2O (3.3 mL, 10:1) was heated under microwave irradiation for 20 min at 110° C. After reaction, it was evaporated, EA and water was added, separated the organic layer, washed with saturated brine, dried over Na2SO4, concentrated and purified by silica gel to give the title compound (64 mg, yield 67%).
To a stirred solution of tert-butyl 5-((2-(3-acetylphenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (500 mg, 1.2 mmol), AcONH4 (924 mg, 12 mmol) in MeOH (10 mL) was added NaBH3CN (91 mg, 1.44 mmol), the mixture was stirred 6 hrs at reflux. After reaction, it was evaporated, diluted with water, filtered to give the title compound as a white solid (300 mg, crude).
A solution of tert-butyl 5-((2-(3-(1-aminoethyl)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (300 mg, crude) in HCl/MeOH (20 mL) was stirred at 40° C. for 6 h. After reaction, it was evaporated, then water was added, adjusted the PH to 9 with saturated Na2CO3, filtered to give the crude product, which was purified by Pre-HPLC to provide the title compound (100 mg) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 13.03 (s, 1H), 9.65 (s, 1H), 8.44 (s, 1H), 8.35 (d, J=5.6 Hz, 2H), 8.18 (d, J=7.2 Hz, 1H), 8.05 (s, 1H), 7.55-7.40 (m, 4H), 6.67 (d, J=5.6 Hz, 1H), 4.12-4.07 (m, 1H), 2.08 (b, 2H), 1.31 (d, J=6.4 Hz, 3H); m/e 331 (M+H)+.
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (1.5 g, crude), (4-acetylphenyl)boronic acid (1.12 g, 6.8 mmol), Na2CO3 (721 mg, 6.8 mmol), (Boc)2O (1.48 g, 6.8 mmol), Pd(PPh3)Cl2 (239 mg, 0.34 mmol) in EtOH:H2O (16.5 mL, 10:1) was heated under microwave irradiation for 20 min at 110° C. After reaction, it was evaporated, EA and water was added, separated the organic layer, washed with saturated brine, dried over Na2SO4, concentrated to give the title compound (2.6 g, crude).
To a stirred solution of tert-butyl 5-((2-(4-acetylphenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (2.6 g, 6.1 mmol), AcONH4 (4.7 g, 61 mmol) in MeOH (60 mL) was added NaBH3CN (461 mg, 7.32 mmol), the mixture was stirred for 10 h at reflux. After reaction, the solvent was evaporated, then water was added, filtered to give the title compound (2.1 g, crude).
A solution of tert-butyl 5-((2-(4-(1-aminoethyl)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (2.1 g, crude) in HCl/MeOH (60 mL) was stirred at 40° C. for 6 h. After reaction, the solvent was evaporated, then water was added, adjusted the pH to 9 with saturated Na2CO3, filtered to give the crude product, which was purified by Pre-HPLC to give the title compound (113.5 mg) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 13.02 (s, 1H), 9.58 (s, 1H), 8.34-8.27 (m, 4H), 8.20 (s, 1H), 8.08 (s, 1H), 7.56 (s, 2H), 7.49 (d, J=6.0 Hz, 1H), 4.05-4.03 (m, 1H), 1.27 (d, J=6.4 Hz, 3H); m/e 331 (M+H)+.
To a mixture of compound 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (550 mg, 2.5 mmol), 2-bromo-1,1-diethoxyethane (985 mg, 5 mmol), Cs2CO3 (2.43 g, 7.5 mmol) in DMF (25 mL) was added KI (106 mg, 1 mmol), then the mixture was stirred overnight at 110° C. After reaction, water was added, then extracted with EA, washed with saturated brine, dried over Na2SO4, concentrated to give the title compound (360 mg, crude) as a light yellow oil.
A mixture of 2-(3-(2,2-diethoxyethoxyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (100 mg, crude), tert-butyl 5-((tert-butoxycarbonyl)(2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (70 mg, 0.15 mmol), Na2CO3 (65 mg, 0.6 mmol), (Boc)2O (130 mg, 0.6 mmol), Pd(PPh3)Cl2 (20 mg, 0.03 mmol) in EtOH:H2O (4.4 mL, 10:1) was heated under microwave irradiation for 20 min at 110° C. After reaction, it was evaporated, EA and water was added, separated the organic layer, washed with saturated brine, dried over Na2SO4, concentrated and purified by Pre-TLC to give the title compound (30 mg).
To a solution of tert-butyl 5-((2-(3-(2,2-diethoxyethoxyl)phenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (510 mg, 0.98 mmol) in THF (20 mL) was added dropwise 3M HCl (10 mL), then the mixture was stirred at reflux for 7 h. After reaction, it was evaporated, then water was added, adjusted the pH to 9 with saturated Na2CO3, filtered to give the title compound (420 mg, crude).
To a stirred solution of 2-(3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)phenoxy)acetaldehyde (420 mg, crude), isopropylamine (245 mg, 4.16 mmol) in MeOH (15 mL) was added NaBH3CN (131 mg, 2.08 mmol), the mixture was stirred 7 h at reflux. After reaction, it was evaporated and purified by Pre-HPLC to give the title compound (90 mg) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 13.02 (s, 1H), 9.65 (s, 1H), 8.34 (d, J=6.0 Hz, 1H), 8.27 (s, 1H), 8.10 (s, 1H), 7.94 (d, J=3.2 Hz, 2H), 7.57-7.38 (m, 3H), 7.05 (d, J=8.0 Hz, 1H), 6.68 (d, J=6.0 Hz, 1H), 4.106-4.079 (m, 1H), 2.91 (s, 2H), 2.80-2.77 (m, 1H), 1.61 (b, 1H), 1.00 (d, J=6.4 Hz, 6H); m/e 389 (M+H)+.
To a stirred solution of 2,4,6-trichloropyrimidine (5.5 g, 30 mmol) in EtOH (100 mL) were added TEA (1.5 g, 45 mmol) and compound 1H-indazol-5-amine (3.99 g, 30 mmol) at room temperature. The mixture was refluxed overnight. After removing the solvent the residue was re-crystallized in MeOH to give the title compound as a solid (3.4 g, yield 40%).
To a stirred solution of N-(2,6-dichloropyrimidin-4-yl)-1H-indazol-5-amine (1 g, 3.5 mmol) in EtOH (10 mL) was added TEA (1.4 g, 7 mmol), and compound tert-butyl piperazine-1-carboxylate (0.67 g, 3.5 mmol) at room temperature. The mixture was refluxed overnight. After reaction, water was added, separated the organic layer and saturated brine, dried over Na2SO4 and concentrated under reduced pressure to give the title compound (1.2 g) which was used directly for next step reaction without further purification.
To a stirred solution of tert-butyl 4-(6-((1H-indazol-5-yl)amino)-2-chloropyrimidin-4-yl)piperazine-1-carboxylate (1.2 g, crude) in DCM (10 mL) was added (Boc)2O (3 g, 14 mmol), TEA (1.4 g, 14 mmol) and DMAP (0.5 g, 3.5 mmol) at room temperature. The mixture was stirred at room temperature for 30 min. After reaction, water was added, separated the organic layer, washed with citric acid monohydrate and saturated brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by column chromatograph on silica gel to give the title compound (0.6 g).
A mixture of tert-butyl 5-((tert-butoxycarbonyl)(6-(4-(tert-butoxycarbonyl)piperazin-1-yl)-2-chloropyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (600 mg, 0.95 mmol), (3-methoxyphenyl)boronic acid (160 mg, 1.05 mmol), Na2CO3 (201 mg, 1.9 mmol), Pd(dppf)Cl2 (70 mg, 0.095 mmol) in dioxane:H2O (6.6 mL, 10:1) was heated under microwave irradiation for 20 min at 140° C. After reaction, it was evaporated, EA and water was added, separated the organic layer, washed with saturated brine, dried over Na2SO4 concentrated and purified by silica gel to give the title compound (250 mg, yield 37.5%).
To a solution of tert-butyl 5-((tert-butoxycarbonyl)(6-(4-(tert-butoxycarbonyl)piperazin-1-yl)-2-(3-methoxyphenyl)pyrimidin-4-yl)amino)-1H-indazole-1-carboxylate (250 mg) in DCM (5 mL) was added TFA (1 mL). The mixture was stirred at room temperature for 30 min. it was evaporated, then water was added, adjusted the pH to 9 with saturated Na2CO3, filtered to give the title compound (115 mg, yield 80%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ 12.98 (s, 1H), 9.30 (s, 1H), 8.09 (s, 1H), 8.00 (s, 1H), 7.53-7.37 (m, 6H), 7.03 (d, J=8.8 Hz, 1H), 6.50 (s, 1H), 3.82 (s, 3H), 3.73 (b, 4H), 3.39 (s, 1H), 2.71 (b, 4H); m/e 402 (M+H)+.
To a stirred solution of N-(2,6-dichloropyrimidin-4-yl)-1H-indazol-5-amine (2 g, 7 mmol) in EtOH (20 mL) was added TEA (2.8 g, 7 mmol), and 2-(dimethylamino)ethanol (0.64 g, 7 mmol) at room temperature. The mixture was refluxed overnight. After reaction, water was added, separated the organic layer and saturated brine, dried over Na2SO4 and concentrated under reduced pressure to give the title compound (1.5 g). The residue was used into next step.
A mixture of N-(2-chloro-6-(2-(dimethylamino)ethoxy)pyrimidin-4-yl)-1H-indazol-5-amine (1.5 g, 4.5 mmol), (3-methoxyphenyl)boronic acid (661 mg, 5 mmol), Na2CO3 (954 mg, 9 mmol), Pd(dppf)Cl2 (300 mg, 0.45 mmol) in dioxane:H2O (22 mL, 10:1) was heated under microwave irradiation for 30 min at 140° C. After reaction, it was evaporated, EA and water was added, separated the organic layer, washed with saturated brine, dried over Na2SO4 and concentrated which was purified by Pre-HPLC to give the title compound as white solid (125 mg). 1H NMR (400 MHz, DMSO-d6) δ 13.00 (s, 1H), 9.67 (s, 1H), 8.18 (s, 1H), 8.04 (s, 1H), 7.56-7.41 (m, 5H), 7.08-6.86 (m, 2H), 4.46-4.43 (m, 1H), 3.83 (s, 3H), 2.66-2.63 (m, 2H), 2.22 (s, 6H); m/e 405 (M+H)+.
The following compounds were synthesized using the procedures described above:
Dose response curves for Rho-kinase inhibition were derived from a Millipore immuno-based 96 well plate assay (Millipore catalog number CSA001). Purified active ROCK1 and ROCK2 were obtained from Invitrogen (catalog numbers ROCKI, PV3691 and ROCK2, PV3759). The kit components include assay plates, which are pre-coated with recombinant MYPT1, which contains a specifically phosphorylatable Thr696. The inhibitory activities of compounds are measured according to the manufactures protocol. Briefly, decreasing concentrations of test compounds or the known ROCK inhibitor Y-27963, are added, from 50 uM to 0.003 uM to reaction buffer containing 5 mM MgCl2, and 10 mUnits of ROCK1 or ROCK2 in assay dilution buffer. This mixture is overlayed into the 96 well plate and the reaction is initiated with the addition of 2.5 uM ATP. The assay proceeds at 300 Celsius for 30 minutes with gentle shaking at 120 rpm. The assay is terminated by washing of the plate 3 times with Tris-buffered saline and tween wash buffer. Anti-phospho-MYPT1 (Thr696) antibody is added to each well to detect the phosphorylated substrate and incubated for 1 hour at room temperature after which HRP conjugated anti-rabbit IgG secondary is added for 1 hour at room temperature. After washing the assay is developed using a substrate reagent and the absorbance is read at 450 nm on a Tecan Infinite M1000 reflecting the relative remaining ROCK phosphorylation activity.
Data showing inhibition of ROCK1 and ROCK2, and selectivity of certain compounds for ROCK2 inhibition, is presented in Table 3.
Dose response curves for inhibition of ROCK1 vs ROCK2 is shown in
Dose response curves for Rho-kinase inhibition were derived from a Invitrogen Z′-LYTE™ Kinase Assay Kit (Invitrogen catalog number PV3793). Purified active ROCK1 and ROCK2 were obtained from Invitrogen (catalog numbers ROCK1, PV3691 and ROCK2, PV3759). The kit components include a coumarin and fluorescein labeled peptide based on myosin light chain 2 (KKRPQRRYSNVF), a proprietary protease containing development reagent and a proprietary Stop buffer used to terminate the development reaction. The inhibitory activities of compounds are measured according to the manufactures protocol. Briefly, decreasing concentrations of test compounds or the known ROCK inhibitor Y-27963, are added, from 10 uM to 2.56×10−5 uM to reaction buffer containing 50 mM HEPES pH 7.5, 10 mM MgCl2, 5 mM EGTA, and 0.05% Brij-35 and of ROCK1 at 0.18 ug/mL or ROCK2 at 0.8 ug/mL in assay dilution buffer. This mixture is overlayed into a white 96-well half area plate and the reaction is initiated with the addition of 5 uM ATP for ROCK1 or 12 uM ATP for ROCK2. The assay proceeds at room temperature for 1 hour followed by the addition of development reagent, and further incubation for 1 hour at room temperature. STOP reagent is then added and the reaction and immediately the coumarin and fluorescein emission signals are read on a Tecan Infinite M1000 fluorescence plate reader (excitation: 400 nm; emission 445 and 520 nm, respectively). By comparing the emission ratios of the test samples against control samples, percent phosphorylation values are calculated and the concentration of inhibitor that produces 1/2 inhibition of kinase activity (IC50) is determined using Prism. Table 4 provides IC50 concentrations for compounds of the above examples. Several of the compounds also demonstrated activity in a preliminary assay that measured inhibition of myosin light chain phosphorylation (pMLC). For compounds marked ND, activity was not determinable under the test conditions employed.
Activation of resting T cells, resulting in cytokine secretion and proliferation, involves two distinct signals from antigen-presenting cells (APCs), mimicked by co-stimulation of the T cell receptor (TCR)/CD3 complex and the CD28 receptor. Using freshly purified CD4+ human T cells and stimulatory antibodies against CD3 and CD28 to stimulate IL-17 and IL-21 secretion in response to TCR activation, it was found that the treatment with ROCK2 selective inhibitor, KD025, significantly inhibited IL-17 and IL-21 secretion in a dose-dependent manner. Under the same conditions, the inhibition of IFN-γ secretion was less robust and significant only at high dose (10 μM) of the inhibitor (
To confirm the role of ROCK2 in regulation of IL-17 and IL-21 secretion in human T cells we specifically silenced ROCK1 and ROCK2 expression by RNA interference. Specific ROCK1 and ROCK2 small interfering RNA (siRNA) reduced the protein expression levels by 72% and 84% respectively. Silencing of ROCK2, but not of ROCK1 significantly reduced the IL-17 and IL-21, with minimal effect on IFN-γ secretion in human T cells (
STAT3 plays a critical role in Th17 differentiation via regulation of RORγt expression and direct binding to the IL-17 and IL-21 promoters. In addition, recent studies have demonstrated that RhoA-dependent STAT3 stimulation requires ROCK activity and leads to activation of STAT3 phosphorylation on amino acid Y705. Using two different experimental designs, KD025 was demonstrated to significantly down-regulates the phosphorylation of STAT3. In one experiment, T cells were pre-treated with KD025 and then stimulation with anti-CD3/CD28 antibodies. Pre-treatment with KD025 resulted in reduced phosphorylation of STAT3 (
Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disease leading to the destruction of joint architecture. The pathogenic events that involved in RA development are not fully understood, although the pivotal role of pro-inflammatory cytokines, such as TNF-α, IL-1β, IFN-β, IL-6 and more recent IL-17 in the induction and maintenance of RA pathogenesis is well documented. Moreover, the frequency of Th17 cells in peripheral blood of RA patients is significantly increased compared to healthy controls and correlates with disease activity score (DAS).
CD4+ T cells were purified from peripheral blood of RA patients at different stages of the disease or from healthy controls and stimulated using anti-CD3/CD28 antibodies in presence of KD025 ex vivo. The ROCK2 selective inhibitor significantly down-regulated the ability of CD4+ T cell to secrete IL-17, IL-21 and IFN-γ in response to TCR stimulation in a STAT3-dependent manner (
Two antibodies that bind to and neutralize human VEGFR2, identified in Table 1, were isolated from human Fab phage display libraries. The antibodies block binding of the ligand VEGFA to hVEGFR2 (
The heavy chain of Mab 101 was reshuffled with κ light chain genes (K-library) and λ light chain genes (λ-library). 20 unique λ light chain variants were found by panning the λ-library against both human VEGFR2 and mouse VEGFR2. 22 unique κ light chain variants were found by panning the κ-library against both human VEGFR2 and mouse VEGFR2. Table 2 indicates amino acid sequences of the CDRs and variable domains of the light chains. The KdS of Mabs 105, 106, and 107 were increased about 10 fold (0.24 nM, 0.22 nM, and 0.12 nM, respectively) (Table 3). These antibodies, and antibody Mab101 from which they are derived, bind to domains 2 and 3 of VEGFR and to constructs containing those domains.
Like the parent antibody, these antibodies bind to VEGFR2 and block binding of VEGFA to VEGFR2 (
Several of the antibodies, including Mabs 138, 139, 140, and 146, also cross react with mouse VEGFR2.
Mabs 138, 139, and 140 inhibited VEGFA-stimulated phosphorylation of VEFGR2 and downstream signal transduction molecules, including MAPK.
A study is conducted of 50 men and women having subfoveal choroidal neovascularization (CNV) lesion secondary to AMD. The study employs Mab 106, which is administered weekly by intravitreal injection for three consecutive weeks. The study also employs a compound of Example 43, which inhibits ROCK2 and is ROCK2 selective. The compound of Example 43 is administered either by i) weekly intravitreal injection, or ii) daily administration by in eye drops. Various amounts of each drug are administered at the designated intervals with certain control subjects receiving only the compound of Example 43, or only Mab 106, or placebo. Subjects are observed over six months to determine intraocular inflammation, macular thickness, and the status of macular perfusion. Visual acuity is also measured over the time period.
For each concentration of Mab 106, intraocular inflammation and macular perfusion is less when the compound of Example 43 is administered. Over the time period of the study, loss of visual acuity is reduced in subjects that receive both agents and some subjects experience improvement.
Patients with proliferative diabetic retinopathy or clinically significant diabetic macular edema requiring surgical intervention are treated preoperatively with pegaptanib (a pegylated anti-VEGF aptamer with specificity for VEGF 165) with or without concomitant treatment with a compound of Example 154. The agents are administered by intravitreal injection. Subjects are evaluated over 8 weeks following surgery as to post operative rebleed, macular edema post injection, and pre- and post-injection levels of VEGF165. It is expected that compared to pegaptanib alone, administration of compound 154 results in reduced bleeding and macular edema.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2013/063755 | 10/7/2013 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 61710467 | Oct 2012 | US |
