Cathepsin K inhibitors and application thereof

1. A compound having Formula (I) or a stereoisomer, a tautomer, a geometric isomer, an N-oxide, or a pharmaceutically acceptable salt thereof,

wherein,

R 4a is H, C 1-6 alkyl or C 2-6 alkenyl, wherein each of the C 1-6 alkyl and C 2-6 alkenyl is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from halogen, C 3-6 cycloalkyl, cyano, C 6-10 aryl, C 1-9 heteroaryl and C 2-9 heterocyclyl;

R 4 is C 1-6 alkyl, —C(R 7 )(R 7a )—R 8 , C 3-9 heterocyclyl or C 2-6 alkenyl, wherein each of the C 1-6 alkyl and C 2-6 alkenyl is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from halogen, C 3-6 cycloalkyl, cyano, C 6-10 aryl, C 1-9 heteroaryl or C 3-9 heterocyclyl;

or, R 4 and R 4a , together with the nitrogen atom to which they are attached, form a C 3-9 heterocyclyl group containing nitrogen, wherein the C 3-9 heterocyclyl is optionally substituted with 1, 2, 3, 4 or 5 substituents selected from C 1-6 alkyl, C 1-6 hydroxyalkyl, cyano, —C(R 10 )(R 10a )—C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , oxo (═O), C 1-6 haloalkyl and halogen;

each of R 7 and R 7a is independently H, C 1-6 alkyl, —C(R 10 )(R 10a )—C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , C 2-9 heterocyclyl or C 2-6 alkenyl;

or, R 7 and R 7a , together with the carbon atom to which they are attached, form a C 3-6 carbocyclic ring or C 2-6 heterocyclic ring, wherein each of the C 3-6 carbocyclic ring and C 2-6 heterocyclic ring is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from C 1-6 alkyl, C 1-6 hydroxyalkyl, C 1-6 haloalkyl, oxo (═O), cyano, —C(═O)—OR 8a and halogen;

R 8 is H, C 1-6 alkyl, cyano, —N(R 12 )(R 12a ), —C(═O)—C(═O)—N(R 12 )(R 12a ), —C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , C 3-6 heterocyclyl or C 2-6 alkenyl;

each R 3 , R 3a , R 2 , R 2a , R 8a , R 10 , R 10a , R 12 and R 12a is independently H or C 1-6 alkyl, wherein the C 1-6 alkyl is optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from halogen, hydroxy, amino, carboxy, cyano, C 3-6 cycloalkyl, C 6-10 aryl, C 1-9 heteroaryl and C 2-9 heterocyclyl;

or, R 2 and R 2a , together with the carbon atom to which they are attached, form a C 3-9 carbocyclic ring or C 2-9 heterocyclic ring, wherein each of the C 3-9 carbocyclic ring and C 2-9 heterocyclic ring is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from C 1-6 alkyl, C 2-6 alkenyl, C 1-6 hydroxyalkyl, C 1-6 haloalkyl, hydroxy, amino, carboxy, cyano and halogen;

or, R 3 and R 3a , together with the carbon atom to which they are attached, form a >C(═O), C 3-9 carbocyclic ring or C 2-9 heterocyclic ring, wherein each of the C 3-9 carbocyclic ring and C 2-9 heterocyclic ring is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from C 1-6 alkyl, C 2-6 alkenyl, C 1-6 hydroxyalkyl, C 1-6 haloalkyl, hydroxy, amino, carboxy, cyano and halogen;

X is —O—, —S—, or —NH—;

each of V, Z and Y is independently C(R 9 ) or N;

each R 9 is independently H, halogen, hydroxy, C 1-4 alkoxy, C 1-4 haloalkyl or C 1-4 alkyl, wherein each of the C 1-4 alkyl is optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from halogen, C 3-6 cycloalkyl, C 6-10 aryl, C 1-9 heteroaryl and C 2-9 heterocyclyl;

R 5 is H, C 1-4 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, F, Cl, Br, nitro, or C 1-4 haloalkyl;

R 1 is C 6-10 aryl, C 1-9 heteroaryl, C 3-12 cycloalkyl or C 2-12 heterocyclyl, wherein of the R 1 is independently and optionally substituted with 1, 2, 3, 4 or 5 R 1a which are the same or different;

each R 1a is independently H, C 1-6 alkyl, C 1-6 haloalkyl, halogen, cyano, oxo (═O), C 1-6 alkoxy, C 6-10 aryl, C 1-9 heteroaryl, C 3-12 cycloalkyl, C 2-12 heterocyclyl, —OR 14 , —SO 2 —N(R 13 )(R 13a ), —N(R 13a )—SO 2 —R 11 , —N(R 13 )(R 13a ), —C(═O)—C(═O)—N(R 13 )(R 13a ), —C(═O)—N(R 13 )(R 13a ), —C(═N—OH)(R 14a ), —N(R 13 )—C(═O)R 14a , —C(═O)—OR 14 , —C(═O)—R 14a or —SO 2 R 14 , wherein each of the R 1a is independently and optionally substituted with 1, 2, 3, 4 or 5 R 1b which are the same or different;

each R 1b is independently H, C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 alkoxy, halogen, nitro, cyano, hydroxy, oxo (═O), —OR 15 , —SO 2 R 15 , —N(R 16 )(R 16a ), —C(═O)—N(R 16 )(R 16a ), C 6-10 aryl, C 1-9 heteroaryl, C 3-12 cycloalkyl or C 2-12 heterocyclyl, wherein each of the R 1b is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from hydroxy, nitro, cyano, C 1-6 alkyl, C 1-6 haloalkyl, halogen, oxo (═O), C 1-6 alkoxy, C 6-10 aryl, C 1-9 heteroaryl, C 3-12 cycloalkyl, C 2-12 heterocyclyl and amino;

each R 16 and R 16a is independently H, C 1-4 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 1-9 heteroaryl, C 3-6 cycloalkyl, —SO 2 R 17 , —N(R 18 )(R 18a ), C 1-4 haloalkyl or C 2-9 heterocyclyl;

each R 15 , R 13 , R 14 , R 14a , R 17 , R 18 and R 18a is independently H, C 1-4 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, 5- to 6-membered heteroaryl, C 3-6 cycloalkyl or 4- to 7-membered heterocyclyl, wherein each of the phenyl, 5- to 6-membered heteroaryl, C 3-6 cycloalkyl and 4- to 7-membered heterocyclyl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from F, Cl, Br, cyano, hydroxy, trifluoromethyl, C 1-4 alkyl, C 1-4 alkoxy and 2,2-difluoroethyl.

2. The compound of claim 1 , wherein,

R 4a is H, methyl, ethyl, n-propyl, or isopropyl;

R 4 is methyl, ethyl, n-propyl, isopropyl, —C(R 7 )(R 7a )—R 8 , 5- to 6-membered heterocyclyl or vinyl, wherein each of the methyl, ethyl, n-propyl, isopropyl and vinyl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from halogen, C 3-6 cycloalkyl and cyano;

or, R 4 and R 42 , together with the nitrogen atom to which they are attached, form one of the following sub-formulae:

wherein each sub-formula is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from C 1-4 alkyl, C 1-4 hydroxyalkyl, oxo (═O), cyano, —C(R 10 )(R 10a )—C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , C 1-4 haloalkyl and halogen;

each of R 7 and R 7a is independently H, C 1-4 alkyl, —C(R 10 )(R 10a )—C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , C 2-6 heterocyclyl or C 2-6 alkenyl;

or, R 7 and R 7a , together with the carbon atom to which they are attached, form a cyclopropyl, cyclopentyl, cyclobutyl, cyclohexyl, morpholinyl, piperidyl or pyrrolyl group, wherein each of the cyclopropyl, cyclopentyl, cyclobutyl, cyclohexyl, morpholinyl, piperidyl and pyrrolyl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from C 1-4 alkyl, C 1-4 hydroxyalkyl, C 1-4 haloalkyl, oxo (═O), cyano, —C(═O)—OR 8a and halogen;

R 8 is H, C 1-4 alkyl, cyano, —N(R 12 )(R 12a ), —C(O)—C(═O)—N(R 12 )(R 12a ), —C(═O)—N(R 12 )(R 12a ), —C(═O)—OR 8a , C 3-6 heterocyclyl or C 2-6 alkenyl.

3. The compound of claim 1 , wherein

each R 3 , R 3a , R 2 , R 2a , R 8a , R 10 , R 10a , R 12 and R 12a is independently H, methyl, ethyl, n-propyl, isopropyl, 1-methylpropyl, 2-methylpropyl or tort-butyl, wherein each of the methyl, ethyl, n-propyl, isopropyl, 1-methylpropyl, 2-methylpropyl and text-butyl is independently and optionally substituted with 1, 2, 3, 4, 5 or 6 substituents selected from F, Cl, Br, hydroxy, amino, carboxy, cyano, cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, phenyl, pyridyl, thiazolyl, diazolyl, piperidyl, furyl, tetrahydrofuryl, azetanyl, oxetanyl and morpholinyl;

or, R 2 and R 2a , together with the carbon atom to which they are attached, form a cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, cycloheptyl, piperidyl, pyrrolidyl, piperazinyl, tetrahydropyranyl, morpholinyl or tetrahydrofuryl group, wherein each of the cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, cycloheptyl, piperidyl, pyrrolidyl, piperazinyl, tetrahydropyranyl, morpholinyl and tetrahydrofuryl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from C 1-4 alkyl, C 2-4 alkenyl, C 1-4 hydroxyalkyl, C 1-4 haloalkyl, hydroxy, amino, carboxy, cyano, F, Cl and Br;

or, R 3 and R 3a , together with the carbon atom to which they are attached, form a >C(═O), cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, cycloheptyl, piperidyl, pyrrolidyl, piperazinyl, tetrahydropyranyl, morpholinyl or tetrahydrofuryl group, wherein each of the cyclohexyl, cyclopentyl, cyclobutyl, cyclopropyl, cycloheptyl, piperidyl, pyrrolidyl, piperazinyl, tetrahydropyranyl, morpholinyl and tetrahydrofuryl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from C 1-4 alkyl, C 1-4 hydroxyalkyl, C 1-4 haloalkyl, hydroxy, amino, carboxy, cyano and halogen.

4. The compound of claim 1 , R 1 is one of the following sub-formulae:

wherein each X 1 , X 2 , X 3 , X 9 and X 10 is independently CH or N;

each X 4 , X 5 , X 6 , X 7 and X 8 is independently —CH 2 —, —C(═O)—, —O—, —S—, —S(═O)—, —S(═O) 2 — or —NH—;

R 1 is independently and optionally substituted with 1, 2, 3, 4 or 5 R 1a which are the same or different;

each R 1a is independently H, C 1-4 alkyl, C 1-4 haloalkyl, halogen, cyano, oxo (═O), C 1-4 alkoxy, —SR 14 , —OR 14 , —SO 2 —N(R 13 )(R 13a ), —N(R 13a )—SO 2 —R 14 , —N(R 13 )(R 13a ), —C(═O)—C(═O)—N(R 13 )(R 13a ), —C(═O)—N(R 13 )(R 13a ), —C(═N—OH)(R 14a ), —N(R 13 )—C(═O)R 14a , —C(═O)—OR 14 , —C(═O)—R 14a or —SO 2 R 14 , or one of the following sub-formulae:

wherein each Y 1 , Y 2 , Y 3 , Y 9 and Y 10 is independently CH or N;

each Y 4 , Y 5 , Y 6 , Y 7 and Y 8 is independently —CH 2 —, —C(═O)—, —O—, —S—, —S(═O)—, —S(═O) 2 — or —NH—;

each R 1a in independently and optionally substituted with 1, 2, 3, 4 or 5 R 1b which are the same or different;

each R 1b is independently H, C 1-4 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-4 alkoxy, halogen, nitro, cyano, hydroxy, oxo (═O), —OR 15 , —SO 2 R 15 , —N(R 16 )(R 16a ), —C(═O)—N(R 16 )(R 16a ), or one of the following sub-formulae:

wherein each Z 1 , Z 2 , Z 3 , Z 9 and Z 10 is independently CH or N;

each Z 4 , Z 5 , Z 6 , Z 7 and Z 8 is independently —CH 2 —, —C(═O)—, —O—, —S—, —S(═O)—, —S(═O) 2 — or —NH—;

each R 1b is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from hydroxy, nitro, cyano, C 1-4 alkyl, C 1-4 haloalkyl, halogen, oxo (═O), C 1-4 alkoxy, phenyl, 5- to 6-membered heteroaryl, 4- to 7-membered cycloalkyl, 4- to 7-membered heterocyclyl and amino;

each R 16 and R 16a is independently H, C 1-4 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 1-9 heteroaryl, C 3-6 cycloalkyl, —SO 2 R 17 , —N(R 18 )(R 18a ), C 1-4 haloalkyl or C 2-6 heterocyclyl;

each R 15 , R 13 , R 13a , R 14 , R 14a , R 17 , R 18 and R 18a is independently H, C 1-4 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, 5- to 6 membered heteroaryl, C 3-6 cycloalkyl or 4- to 6-membered heterocyclyl, wherein each of the phenyl, 5- to 6-membered heteroaryl, cycloalkyl and 4- to 6-membered heterocyclyl is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from F, Br, cyano, hydroxy, trifluoromethyl, C 1-4 alkyl, C 1-4 alkoxy and 2,2-difluoroethyl.

5. The compound of claim 1 , wherein

R 1 is one of the following sub-formulae:

wherein each R 1 is independently and optionally substituted with 1, 2, 3, 4 or 5 R 1a which are the same or different;

each R 1a is independently H, ethyl, methyl, n-propyl, i-propyl, n-butyl, t-butyl, cyano, trifluoromethyl, 2,2-difluoroethyl, 3,3,3-trifluoropropyl, F, Cl, Br, oxo (═O), methoxy, n-propoxy, ethoxy, t-butoxy, 2-methylpropoxy, i-propoxy, —SR 14 , —OR 14 , —SO 2 —N(R 13 )(R 13a ), —N(R 13a )—SO 2 —R 14 , —N(R 13 )(R 13a ), —C(═O)—C(═O)—N(R 13 )(R 13a ), —C(═O)—N(R 13 )(R 13a ), —C(═N—OH)(R 14a ), —N(R 13 )—C(═O)R 14a , —C(═O)—OR 14 , —C(═O)R 14a , —SO 2 R 14 , or one of the following sub-formulae:

wherein each R 1a is independently and optionally substituted with 1, 2, 3, 4 or 5 R 1b which are the same or different;

each R 1b is independently H, methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, cyclobutyl, cyclopropyl, cyclohexyl, cyclopentyl, haloalkyl, C 2-6 alkenyl, C 2-6 alkenyl, methoxy, F, Cl, Br, nitro, cyano, hydroxy, oxo (═O), —OR 15 , —SO 2 R 15 ,

wherein each R 1b is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from hydroxy, nitro, cyano, methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, C 1-4 haloalkyl, F, Cl, Br, oxo (═O), alkoxy, phenyl, pyridyl, thiazolyl, thienyl, diazolyl, triazolyl, tetrazolyl, epoxypropyl, tetrahydrofuryl, tetrahydropyranyl, morpholinyl, piperdyl, cyclobutyl, cyclopentyl, dioxanyl, cyclohexyl and amino;

each R 16 and R 16a is independently H, C 1-4 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, —SO 2 R 17 , —N(R 18 )(R 18a ), C 1-4 haloalkyl, cyclopropyl, cyclohexyl,

each R 15 , R 13 , R 13a , R 14 , R 14a , R 17 , R 18 and R 18a is independently H, methyl, ethyl, n-propyl, i-propyl, n-butyl, 2-methylpropyl, t-butyl, trifluoromethyl, difluoromethyl, 2,2-difluoroethyl, 3,3,3-trifluoropropyl, phenyl, cyclopropyl, cyclohexyl,

wherein each sub-formula is independently and optionally substituted with 1, 2, 3, 4 or 5 substituents selected from F, Cl, Br, cyano, hydroxy, trifluoromethyl, C 1-4 alkyl, C 1-4 alkoxy and 2,2-difluoroethyl.

6. The compound of claim 1 having Formula (II) or a stereoisomer, a tautomer, a geometric isomer, an N-oxide, or a pharmaceutically acceptable salt thereof,

7. The compound of claim 1 having Formula (III) or a stereoisomer, a tautomer, a geometric isomer, an N-oxide, or a pharmaceutically acceptable salt thereof,

8. The compound of claim 1 having one of the following structures or a stereoisomer, a tautomer, a geometric isomer, an N-oxide, or a pharmaceutically acceptable salt thereof,

9. A pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier, excipient, diluent, adjuvant, vehicle, or a combination thereof.

10. The pharmaceutical composition of claim 9 further comprising an organic bisphosphonic acid compound, an estrogen receptor modulator, an estrogen receptor beta modulator, an androgen receptor modulator, an inhibitor of osteoclast proton ATPase, an inhibitor of HMG-CoA reductase, an integrin receptor antagonist, or an osteoblast anabolic agent, a non-steroidal anti-inflammatory drug, a selective cyclooxygenase-2 inhibitor, an interleukin-1β inhibitor, a LOX/COX inhibitor, vitamin D, phytoestrogen, calcitonin, strontium ranelate, odanacatib, ONO5334, MIV-711, MIV-710, and a pharmaceutically acceptable salt and a combination thereof.

11. A method of treating a cathepsin dependent disease in a patient comprising administering to the patient with a therapeutically effective amount of the compound of claim 1 , wherein the cathepsin dependent disease is osteoporosis, glucocorticoid induced bone osteoporosis, Paget's disease, abnormally increased bone turnover, periodontal disease, tooth loss, bone fracture, rheumatoid arthritis, osteoarthritis, periprosthetic osteolysis, osteogenesis imperfecta, metastatic bone disease, hypercalcemia of malignancy and multiple myeloma.

12. A method of treating a cathepsin dependent disease in a patient comprising administering to the patient with a therapeutically effective amount of the pharmaceutical composition of claim 9 , wherein the cathepsin dependent disease is osteoporosis, glucocorticoid induced bone osteoporosis, Paget's disease, abnormally increased bone turnover, periodontal disease, tooth loss, bone fracture, rheumatoid arthritis, osteoarthritis, periprosthetic osteolysis, osteogenesis imperfecta, metastatic bone disease, hypercalcemia of malignancy and multiple myeloma.