Triazolopyridines and triazolopyrazines as LSD1 inhibitors

1. A method of treating cancer comprising administering to a patient a therapeutically effective amount of a compound of Formula IVa:

or a pharmaceutically acceptable salt thereof, wherein:

X is CH;

R 1 is OR a1 ;

each R A is independently selected from halo, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, CN, NO 2 , OR a4 , C(O)R b4 , C(O)NR c4 R d4 , C(O)OR a4 , NR c4 R d4 , NR c4 C(O)R b4 , S(O) 2 R b4 , and S(O) 2 NR c4 R d4 , wherein said C 1-6 alkyl, C 2-6 alkenyl, and C 2-6 alkynyl are each optionally substituted by 1, 2, or 3, substituents independently selected from halo, C 1-6 haloalkyl, CN, NO 2 , OR a4 , C(O)R b4 , C(O)NR c4 R d4 , C(O)OR a4 , NR c4 R d4 , NR c4 C(O)R b4 , S(O) 2 R b4 , and S(O) 2 NR c4 R d4 ;

each R B is independently selected from halo, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, CN, NO 2 , OR a5 , C(O)R b5 , C(O)NR c5 R d5 , C(O)OR a5 , NR c5 R d5 , NR c5 C(O)R b5 , S(O) 2 R b5 , and S(O) 2 NR c5 R d5 , wherein said C 1-6 alkyl, C 2-6 alkenyl, and C 2-6 alkynyl are each optionally substituted by 1, 2, or 3 substituents independently selected from halo, C 1-6 haloalkyl, CN, NO 2 , OR a5 , C(O)R b5 , C(O)NR c5 R d5 , C(O)OR a5 , NR c5 R d5 , NR c5 C(O)R b5 , S(O) 2 R b5 , and S(O) 2 NR c5 R d5 ;

R Z is H, C 1-6 alkyl, or C 1-6 haloalkyl, wherein said C 1-6 alkyl is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from Cy 4 , halo, CN, OR a3 , C(O)NR c3 R d3 , and NR c3 R d3 ;

each Cy 4 is independently selected from phenyl, C 3-7 cycloalkyl 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1 or 2 substituents independently selected from R Cy ;

each Cy 5 is independently selected from 4-7 membered heterocycloalkyl, each of which is optionally substituted with 1 or 2 substituents independently selected from R Cy ;

each R Cy is selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 cyanoalkyl, CN, NO 2 , OR a6 , C(O)R b6 , C(O)NR c6 R d6 , C(O)OR a6 , NR c6 R d6 , NR c6 C(O)R b6 , S(O) 2 R b6 , and S(O) 2 NR c6 R d6 ;

each R a1 is C 1-6 alkyl optionally substituted with Cy 5 ;

each R a3 , R c3 , and R d3 is independently selected from H, C 1-6 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 3-10 cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C 6-10 aryl-C 1-4 alkyl-, C 3-10 cycloalkyl-C 1-4 alkyl-, (5-10 membered heteroaryl)-C 1-4 alkyl-, and (4-10 membered heterocycloalkyl)-C 1-4 alkyl-, wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 3-10 cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C 6-10 aryl-C 1-4 alkyl-, C 3-10 cycloalkyl-C 1-4 alkyl-, (5-10 membered heteroaryl)-C 1-4 alkyl-, and (4-10 membered heterocycloalkyl)-C 1-4 alkyl- are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 cyanoalkyl, halo, CN, OR a8 , SR a8 , C(O)R b8 , C(O)NR c8 R d8 , C(O)OR a8 , OC(O)R b8 , OC(O)NR c8 R d8 , NR c8 R d8 , NR c8 C(O)R b8 , NR c8 C(O)NR c8 R d8 , NR c8 C(O)OR a8 , C(═NR e8 )NR c8 R d8 , NR c8 C(═NR e8 )NR c8 R d8 , S(O)R b8 , S(O)NR c8 R d8 , S(O) 2 R b8 , NR c8 S(O) 2 R b8 , NR c8 S(O) 2 NR c8 R d8 , and S(O) 2 NR c8 R d8 ;

each R a4 , R b4 , R c4 , and R d4 is independently selected from H, C 1-6 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, and C 2-6 alkynyl, wherein said C 1-6 alkyl, C 2-6 alkenyl, and C 2-6 alkynyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 cyanoalkyl, halo, CN, OR a8 , SR a8 , C(O)R b8 , C(O)NR c8 R d8 , C(O)OR a8 , OC(O)R b8 , OC(O)NR c8 R d8 , NR c8 R d8 , NR c8 C(O)R b8 , NR c8 C(O)NR c8 R d8 , NR c8 C(O)OR a8 , C(═NR e8 )NR c8 R d8 , NR c8 C(═NR e8 )NR c8 R d8 , S(O)R b8 , S(O)NR c8 R d8 , S(O) 2 R b8 , NR c8 S(O) 2 R b8 , NR c8 S(O) 2 NR c8 R d8 , and S(O) 2 NR c8 R d8 ;

each R a5 , R b5 , R c5 , and R d5 is independently selected from H, C 1-6 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 3-10 cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C 6-10 aryl-C 1-4 alkyl-, C 3-10 cycloalkyl-C 1-4 alkyl-, (5-10 membered heteroaryl)-C 1-4 alkyl-, and (4-10 membered heterocycloalkyl)-C 1-4 alkyl-, wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 6-10 aryl, C 3-10 cycloalkyl, 5-10 membered heteroaryl, 4-10 membered heterocycloalkyl, C 6-10 aryl-C 1-4 alkyl-, C 3-10 cycloalkyl-C 1-4 alkyl-, (5-10 membered heteroaryl)-C 1-4 alkyl-, and (4-10 membered heterocycloalkyl)-C 1-4 alkyl- are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 cyanoalkyl, halo, CN, OR a8 , SR a8 , C(O)R b8 , C(O)NR c8 R d8 , C(O)OR a8 , OC(O)R b8 , OC(O)NR c8 R d8 , NR c8 R d8 , NR c8 C(O)R b8 , NR c8 C(O)NR c8 R d8 , NR c8 C(O)OR a8 , C(═NR e8 )NR c8 R d8 , NR c8 C(═NR e8 )NR c8 R d8 , S(O)R b8 , S(O)NR c8 R d8 , S(O) 2 R b8 , NR c8 S(O) 2 R b8 , NR c8 S(O) 2 NR c8 R d8 , and S(O) 2 NR c8 R d8 ;

each R a6 , R b6 , R c6 , and R d6 is independently selected from H, C 1-6 alkyl, C 1-4 haloalkyl, C 2-6 alkenyl, and C 2-6 alkynyl, wherein said C 1-6 alkyl, C 2-6 alkenyl, and C 2-6 alkynyl are each optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 cyanoalkyl, halo, CN, OR a8 , SR a8 , C(O)R b8 , C(O)NR c8 R d8 , C(O)OR a8 , OC(O)R b8 , OC(O)NR c8 R d8 , NR c8 R d8 , NR c8 C(O)R b8 , NR c8 C(O)NR c8 R d8 , NR c8 C(O)OR a8 , C(═NR e8 )NR c8 R d8 , NR c8 C(═NR e8 )NR c8 R d8 , S(O)R b8 , S(O)NR c8 R d8 , S(O) 2 R b8 , NR c8 S(O) 2 R b8 , NR c8 S(O) 2 NR c8 R d8 , and S(O) 2 NR c8 R d8 ;

each R a8 , R b8 , R c8 , and R d8 is independently selected from H, C 1-4 alkyl, C 1-4 haloalkyl, C 2-4 alkenyl, and C 2-4 alkynyl, wherein said C 1-4 alkyl, C 2-4 alkenyl, and C 2-4 alkynyl are each optionally substituted with 1, 2, or 3 substituents independently selected from OH, CN, amino, halo, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 alkylthio, C 1-4 alkylamino, di(C 1-4 alkyl)amino, C 1-4 haloalkyl, and C 1-4 haloalkoxy;

each R e8 is independently selected from H, C 1-4 alkyl, and CN;

n is 0, 1, 2, 3, or 4; and

m is 0, 1, 2, 3, or 4;

wherein said cancer is a hematological cancer, sarcoma, lung cancer, gastrointestinal cancer, genitourinary tract cancer, liver cancer, bone cancer, nervous system cancer, gynecological cancer, or skin cancer.

2. The method of claim 1 wherein said hematological cancer is selected from acute lymphoblastic leukemia (ALL), acute myelogenous leukemia (AML), acute promyelocytic leukemia (APL), chronic lymphocytic leukemia (CLL), chronic myelogenous leukemia (CML), diffuse large B-cell lymphoma (DLBCL), mantle cell lymphoma, Non-Hodgkin lymphoma (including relapsed or refractory NHL and recurrent follicular), Hodgkin lymphoma, primary myelofibrosis (PMF), polycythemia vera (PV), essential thrombocytosis (ET)), myelodysplasia syndrome (MDS), and multiple myeloma.

3. The method of claim 1 , wherein R Z is H, C 1-4 alkyl, or C 1-6 haloalkyl, wherein said C 1-4 alkyl is optionally substituted with 1, 2, 3, 4, or 5 substituents independently selected from OH, CN, F, phenyl, C 3-7 cycloalkyl, 5-6 membered heterocycloalkyl, 5-6 membered heteroaryl, C(O)NH 2 , phenoxy, and dimethylamino, wherein said phenyl is optionally substituted by CN and said 5-6 membered heteroaryl is optionally substituted by methyl.

4. The method of claim 1 , wherein R Z is H, methyl, cyanomethyl, cyanoethyl, cyclopentylmethyl, tetrahydrofuranylmethyl, (1-methyl-1H-pyrazol-3-yl)methyl, morpholinylethyl, aminocarbonylmethyl, 3,3,3-trifluoro-2-hydroxypropyl, piperidinylmethyl, phenoxyethyl, dimethylaminoethyl, benzyl, cyanophenyl, or hydroxyethyl.

5. The method of claim 1 , wherein R A is CN.

6. The method of claim 1 , wherein R B is C 1-6 alkyl.

7. The method of claim 1 , wherein R B is methyl.

8. The method of claim 1 , wherein each R a1 is pyrrolidinylmethyl.

9. The method of claim 1 , wherein Cy 4 is phenyl, cyclopentyl, tetrahydrofuranyl, pyrazolyl, morpholinyl, or piperidinyl, each optionally substituted by one substituent independently selected from methyl and CN.

10. The method of claim 1 , wherein Cy 5 is pyrrolidinyl.

11. The method of claim 1 , wherein the compound is selected from:

4-{5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-methyl-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

(R)-4-(2-(cyanomethyl)-3-oxo-8-(pyrrolidin-3-ylmethoxy)-5-p-tolyl-2,3-dihydro-[1,2,4]triazolo[4,3-a]pyridin-6-yl)benzonitrile;

4-{2-(2-cyanoethyl)-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-(cyclopentylmethyl)-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-[5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2-(tetrahydrofuran-2-ylmethyl)-2, 3-dihydro[1,2,4]triazolo[4, 3-a]pyridin-6-yl]benzonitrile;

4-{5-(4-methylphenyl)-2-[(1-methyl-1H-pyrazol-3-yl)methyl]-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2, 3-dihydro [1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{5-(4-methylphenyl)-2-(2-morpholin-4-ylethyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

2-[6-(4-cyanophenyl)-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy][1, 2,4]triazolo [4,3-a]pyridin-2(3H)-yl]acetamide;

4-[5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2-(3,3,3-trifluoro-2-hydroxypropyl)-2,3-dihydro [1,2,4]triazolo[4,3-a]pyridin-6-yl]benzonitrile;

4-{5-(4-methylphenyl)-3-oxo-2-(piperidin-4-ylmethyl)-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{5-(4-methylphenyl)-3-oxo-2-(2-phenoxyethyl)-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-[2-(dimethylamino)ethyl]-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-benzyl-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-(4-cyanobenzyl)-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

4-{2-(2-hydroxyethyl)-5-(4-methylphenyl)-3-oxo-8-[(3R)-pyrrolidin-3-ylmethoxy]-2,3-dihydro[1,2,4]triazolo[4,3-a]pyridin-6-yl}benzonitrile;

or a pharmaceutically acceptable salt of any of the aforementioned.

12. The method of claim 1 , wherein n is 1 or 2.

13. The method of claim 1 , wherein m is 1, 2, 3, or 4.

14. The method of claim 1 , wherein m is 1 or 2.

15. The method of claim 1 , wherein the hematological cancer is acute myelogenous leukemia (AML).

16. The method of claim 1 , wherein the cancer is lung cancer.

17. The method of claim 16 , wherein the lung cancer is selected from non-small cell lung cancer (NSCLC), bronchogenic carcinoma, alveolar carcinoma, bronchial adenoma, chondromatous hamartoma, and mesothelioma.

18. The method of claim 16 , wherein the lung cancer is selected from squamous cell carcinoma, undifferentiated large cell carcinoma, and adenocarcinoma.

19. The method of claim 16 , wherein the lung cancer is undifferentiated small cell lung cancer.

20. The method of claim 1 , wherein the hematological cancer is primary myelofibrosis (PMF).

21. The method of claim 1 , wherein the sarcoma is Ewing's sarcoma.