Bicyclic heterocycles as FGFR4 inhibitors

1. A compound of Formula (I):

or a pharmaceutically acceptable salt thereof, wherein:

X 1 is CR 10 R 11 ;

X is N or CR 6 ;

R 1 is C 1-3 alkyl or C 1-3 haloalkyl;

R 2 is H, halo, C 1-3 alkyl, C 1-3 haloalkyl, CN, or C 1-3 alkoxy;

R 3 is H, halo, C 1-3 alkyl, C 1-3 haloalkyl, CN, or C 1-3 alkoxy;

R 4 is C 1-3 alkyl or C 1-3 haloalkyl;

R 5 is H, halo, C 1-3 alkyl, C 1-3 haloalkyl, CN, or C 1-3 alkoxy;

R 6 is selected from H, halo, CN, OR a4 , SR a4 , C(O)NR c4 R d4 , OC(O)NR c4 R d4 , NR c4 R d4 , NR c4 C(O)R b4 , NR c4 C(O)OR a4 , NR c4 C(O)NR c4 R d4 , NR c4 S(O)R b4 , NR c4 S(O) 2 R b4 , NR c4 S(O) 2 NR c4 R d4 , S(O)R b4 , S(O)NR c4 R d4 , S(O) 2 R b4 , S(O) 2 NR c4 R d4 , C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, C 3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R 6 are each optionally substituted with 1, 2, or 3 substituents independently selected from R 10A ;

L is —(CR 13 R 14 ) n —, wherein R 13 and R 14 are each independently H;

the subscript n is 1 or 2;

R 8 is H;

R 10 and R 11 are each independently selected from H, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, C 6-10 aryl, C 3-10 cycloalkyl, a 5-10 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-10 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; 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, and 4-10 membered heterocycloalkyl groups of R 10 and R 11 are each optionally substituted with 1, 2, 3, or 4 R 10A ;

R 10A , at each occurrence, is independently selected from halo, CN, NO 2 , OR a4 , SR a4 , C(O)R b4 , C(O)NR c4 R d4 , C(O)OR a4 , OC(O)R b4 , OC(O)NR c4 R d4 , C(═NR e4 )NR c4 R d4 , NR c4 C(═NR e4 )NR c4 R d4 , NR c4 R d4 , NR c4 C(O)R b4 , NR c4 C(O)OR a4 , NR c4 C(O)NR c4 R d4 , NR c4 S(O)R b4 , NR c4 S(O) 2 R b4 , NR c4 S(O) 2 NR c4 R d4 , S(O)R b4 , S(O)NR c4 R d4 , S(O) 2 R b4 , S(O) 2 NR c4 R d4 , C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, C 3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R 10A are each optionally substituted with 1, 2, or 3 substituents independently selected from R 19 ;

R a4 , R b4 , R c4 , and R d4 , at each occurrence, are independently selected from H, C 1-4 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, C 1-4 haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said C 1-4 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, phenyl, C 3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl group of R a4 , R b4 , R c4 , and R d4 are each optionally substituted with 1, 2, or 3 substituents independently selected from R 19 ;

alternatively, R c4 and R d4 together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1, 2 or 3 substituents independently selected from R 19 ;

R e4 , at each occurrence, is H or C 1-4 alkyl;

alternatively, R 10 and R 11 together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group or a 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group; wherein said 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group and 4-, 5-, 6-, 7-, 8-, 9-, or 10-membered heterocycloalkyl group are each optionally substituted with 1, 2, 3 or 4 R 10A ;

R 12 is H or C 1-4 alkyl which is optionally substituted by R 17 ;

R 17 , at each occurrence, is independently selected from halo, CN, NO 2 , OR a7 , SR a7 , C(O)R b7 , C(O)NR c7 R d7 , C(O)OR a7 , OC(O)R b7 , OC(O)NR c7 R d7 , C(═NR e7 )NR c7 R d7 , NR c7 C(═NR e7 )NR c7 R d7 , NR c7 R d7 , NR c7 C(O)R b7 , NR c7 C(O)OR a7 , NR c7 C(O)NR c7 R d7 , NR c7 S(O)R b7 , NR c7 S(O) 2 R b7 , NR c7 S(O) 2 NR c7 R d7 , S(O)R b7 , S(O)NR c7 R d7 , S(O) 2 R b7 , S(O) 2 NR c7 R d7 , C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, phenyl, C 3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R 17 are each optionally substituted with 1, 2, or 3 substituents independently selected from R 19 ;

R a7 , R b7 , R c7 , and R d7 , at each occurrence, are independently selected from H, C 1-4 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, C 1-4 haloalkyl, phenyl, C 3-6 cycloalkyl, a 5-6 membered heteroaryl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S, and a 4-7 membered heterocycloalkyl moiety having carbon and 1, 2, or 3 heteroatoms independently selected from N, O and S; wherein said C 1-4 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, phenyl, C 3-6 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl groups of R a7 , R b7 , R c7 , and R d7 are each optionally substituted with 1, 2, or 3 substituents independently selected from R 19 ;

alternatively, R c7 and R d7 together with the nitrogen atom to which they are attached form a 4-, 5-, 6-, or 7-membered heterocycloalkyl group which is optionally substituted with 1, 2 or 3 substituents independently selected from R 19 ;

R e7 , at each occurrence, is independently H or C 1-4 alkyl;

R 19 , at each occurrence, is independently selected from halo, CN, NO 2 , OR a9 , SR a9 , C(O)R b9 , C(O)NR c9 R d9 , C(O)OR a9 , OC(O)R b9 , OC(O)NR c9 R d9 , NR c9 R d9 , NR c9 C(O)R b9 , NR c9 C(O)OR a9 , NR c9 C(O)NR c9 R d9 , NR c9 S(O)R b9 , NR c9 S(O) 2 R b9 , NR c9 S(O) 2 NR c9 R d9 , S(O)R b9 , S(O)NR c9 R d9 , S(O) 2 R b9 , S(O) 2 NR c9 R d9 , C 1-4 alkyl, C 2-4 alkenyl, C 2-4 alkynyl, and C 1-4 haloalkyl;

R a9 , R c9 , and R d9 , at each occurrence, are independently selected from H and C 1-4 alkyl; and

R b9 , at each occurrence, is independently C 1-4 alkyl.

2. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 2 is F and R 5 is F.

3. The compound of claim 1 , having Formula (V):

or a pharmaceutically acceptable salt thereof.

4. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 is C 1-6 alkyl and R 11 is C 1-6 alkyl.

5. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 are each methyl.

6. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form a 3-, 4-, 5-, 6-, or 7-membered cycloalkyl group.

7. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form a cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group.

8. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form a cyclopropyl or cyclopentyl.

9. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form a cyclopropyl group.

10. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form 4-, 5-, 6-, or 7-membered heterocycloalkyl group.

11. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 and R 11 together with the carbon atom to which they are attached form a tetrahydropyranyl group.

12. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein L is —CH 2 —.

13. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 1 and R 4 are each C 1-3 alkyl.

14. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 1 and R 4 are methyl.

15. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein X is CH or N.

16. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein X is CH.

17. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein X is N.

18. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 12 is H.

19. The compound of claim 1 , wherein the compound is selected from the group consisting of:

N-{[2′-(2,6-difluoro-3,5-dimethoxyphenyl)-3′-oxo-2′,3′-dihydro-1′H-spiro[cyclopropane-1,4′-[2,7]naphthyridin]-6′-yl]methyl}acrylamide;

N-((6′-(2,6-difluoro-3,5-dimethoxyphenyl)-7′-oxo-6′,7′-dihydro-5′H-spiro[cyclopropane-1,8′-pyrido[4,3-d]pyrimidine]-2′-yl)methyl)acrylamide;

N-((2′-(2,6-difluoro-3,5-dimethoxyphenyl)-3′-oxo-2′,3′-dihydro-1′H-spiro[cyclopentane-1,4′-[2,7]naphthyridine]-6′-yl)methyl)acrylamide;

N-((7-(2,6-difluoro-3,5-dimethoxyphenyl)-5,5-dimethyl-6-oxo-5,6,7,8-tetrahydro-2,7-naphthyridin-3-yl)methyl)acrylamide; and

N-((2′-(2,6-difluoro-3,5-dimethoxyphenyl)-5′-methyl-3′-oxo-2′,3′-dihydro-1′H-spiro[cyclopropane-1,4′-[2,7]naphthyridine]-6′-yl)methyl)acrylamide;

or a pharmaceutically acceptable salt thereof.

20. A pharmaceutical composition comprising a compound of claim 1 , or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier or excipient.