Substituted pyridine derivatives as SARM1 inhibitors

1. A method of treating a neurological disorder in a patient in need thereof comprising administering to the patient a therapeutically effective amount of a compound of Formula IIa:

or a pharmaceutically acceptable salt thereof, wherein:

Q is —Cy, —C 1-4 alkyl-Cy, —CF 3 , or —C 1-4 alkyl-CF 3 ;

R 1 is H;

R 2 is H or C 1-4 alkyl;

R 4 and R 4a are each independently selected from H, halo, and C 1-4 alkyl;

each R 5 is independently selected from halo and C 1-4 alkyl, wherein R 5 is attached to a carbon atom;

R 6 and R 7 are each independently selected from H, —OR a , —NR c R d , C 1-4 alkyl, and C 1-4 haloalkyl;

Cy is selected from C 6-10 aryl, C 3-7 cycloalkyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each optionally substituted by 1, 2, 3, 4, or 5 R Cy substituents independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, NO 2 , OR a , SR a , C(O)R b , C(O)NR c R d , C(O)OR a , OC(O)R b , OC(O)NR c R d , NR c R d , NR c C(O)R b , NR c C(O)OR a , NR c C(O)NR c R d , C(═NR e )R b , C(═NR e )NR c R d , NR c C(═NR e )NR c R d , NRCS(O)R b , NRCS(O) 2 R b , NRCS(O) 2 NR c R d , S(O)R b , S(O)NR c R d , S(O) 2 R b , and S(O) 2 NR c R d ,

or two adjacent Roy substituents together with the atoms to which they are attached form a fused phenyl, C 3-7 cycloalkyl, 5-6 membered heteroaryl, or 4-7 membered heterocycloalkyl ring, each optionally substituted by 1, 2, 3, 4, or 5 substituents independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, NO 2 , OR a , SR a , C(O)R b , C(O)NR c R d , C(O)OR a , OC(O)R b , OC(O)NR c R d , NR c R d , NR c C(O)R b , NR c C(O)OR a , NR c C(O)NR c R d , C(═NR e )R b , C(═NR e )NR c R d , NR c C(═NR e )NR c R d , NRCS(O)R b , NRCS(O) 2 R b , NRCS(O) 2 NR c R d , S(O)R b , S(O)NR c R d , S(O) 2 R b , and S(O) 2 NR c R d ,

each R a , R b , R c , and R d is independently selected from H, C 1-4 alkyl, and C 1-4 haloalkyl, wherein said C 1-4 alkyl is 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 haloalkyl, and C 1-4 haloalkoxy;

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

n is 0, 1, or 2; and

m is 1 or 2; wherein the neurological disorder is selected from amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), diabetic neuropathy, traumatic brain injury (TBI), ocular neuropathy, Parkinson's disease, Alzheimer's disease, and peripheral neuropathy.

2. The method of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 2 is H.

3. The method of claim 2 , or a pharmaceutically acceptable salt thereof, wherein R 4 is H.

4. The method of claim 3 , or a pharmaceutically acceptable salt thereof, wherein R 4a is H.

5. The method of claim 4 , or a pharmaceutically acceptable salt thereof, wherein R 6 and R 7 are each independently selected from H and OH.

6. The method of claim 5 , or a pharmaceutically acceptable salt thereof, wherein at least one of R 6 and R 7 is H.

7. The method of claim 6 , or a pharmaceutically acceptable salt thereof, wherein both R 6 and R 7 are H.

8. The method of claim 6 , or a pharmaceutically acceptable salt thereof, wherein R 6 is OH and R 7 is H.

9. The method of claim 6 , or a pharmaceutically acceptable salt thereof, wherein Q is —CF 3 .

10. The method of claim 6 , or a pharmaceutically acceptable salt thereof, wherein Q is —Cy.

11. The method of claim 10 , or a pharmaceutically acceptable salt thereof, wherein Cy is selected from C 6-10 aryl and 5-6 membered heteroaryl, each optionally substituted by 1, 2, 3, 4, or 5 R Cy substituents independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, NO 2 , OR a , SR a , C(O)R b , C(O)NR c R d , C(O)OR a , OC(O)R b , OC(O)NR c R d , NR c R d , NR c C(O)R b , NR c C(O)OR a , NR c C(O)NR c R d , C(═NR e )R b , C(═NR c )NR c R d , NR c C(═NR c )NR c R d , NRCS(O)R b , NRCS(O) 2 R b , NRCS(O) 2 NR c R d , S(O)R b , S(O)NR c R d , S(O) 2 R b , and S(O) 2 NR c R d .

12. The method of claim 11 , or a pharmaceutically acceptable salt thereof, wherein Cy is selected from 5-6 membered heteroaryl optionally substituted by 1, 2, 3, or 4 R Cy substituents independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, NO 2 , OR a , SR a , C(O)R b , C(O)NR c R d , C(O)OR a , OC(O)R b , OC(O)NR c R d , NR c R d , NR c C(O)R b , NR c C(O)OR a , NR c C(O)NR c R d , C(═NR e )R b , C(═NR e )NR c R d , NR c C(═NR e )NR c R d , NRCS(O)R b , NR c S(O) 2 R b , NRCS(O) 2 NR c R d , S(O)R b , S(O)NR c R d , S(O) 2 R b , and S(O) 2 NR c R d .

13. The method of claim 12 , or a pharmaceutically acceptable salt thereof, wherein Cy is thiazoyl optionally substituted by 1 or 2 R Cy substituents independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, NO 2 , OR a , SR a , C(O)R b , C(O)NR c R d , C(O)OR a , OC(O)R b , OC(O)NR c R d , NR c R d , NR c C(O)R b , NR c C(O)OR a , NR c C(O)NR c R d , C(═NR e )R b , C(═NR e )NR c R d , NR c C(═NR e )NR c R d , NRCS(O)R b , NRCS(O) 2 R b , NRCS(O) 2 NR c R d , S(O)R b , S(O)NR c R d , S(O) 2 R b , and S(O) 2 NR c R d .

14. The method of claim 13 , or a pharmaceutically acceptable salt thereof, wherein Cy is

15. The method of claim 13 , or a pharmaceutically acceptable salt thereof, wherein each Roy substituent is independently selected from halo, C 1-4 alkyl, C 1-4 haloalkyl, CN, OR a , C(O)R b , C(O)NR c R d , C(O)OR a , NR c R d , NR c C(O)R b , NRCS(O) 2 R b , S(O) 2 R b , and S(O) 2 NR c R d .

16. The method of claim 9 , or a pharmaceutically acceptable salt thereof, wherein n is 0.

17. The method of claim 16 , or a pharmaceutically acceptable salt thereof, wherein m is 1.

18. A method of treating a neurological disorder in a patient in need thereof comprising administering to the patient a therapeutically effective amount of a compound selected from:

4-((2-(2,2,2-Trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

4-((2-(3,3,3-trifluoropropyl)-1H-imidazol-4-yl)methyl)pyridine;

2-(4-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)acetonitrile;

3-(4-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)propanenitrile;

rac-4-(1-(2-(2,2,2-Trifluoroethyl)-1H-imidazol-4-yl)ethyl)pyridine;

(R)-4-(1-(2-(2,2,2-Trifluoroethyl)-1H-imidazol-4-yl)ethyl)pyridine;

(S)-4-(1-(2-(2,2,2-Trifluoroethyl)-1H-imidazol-4-yl)ethyl)pyridine;

5-((4-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)methyl)thiazole;

4-((5-(2,2,2-Trifluoroethyl)-1H-1,2,4-triazol-3-yl)methyl)pyridine;

2-(Pyridin-4-ylmethyl)-4-(2,2,2-trifluoroethyl)thiazole;

4-(Pyridin-4-ylmethyl)-2-(2,2,2-trifluoroethyl)thiazole;

rac-4-(1-(5-(2,2,2-trifluoroethyl)-1H-pyrrol-2-yl)ethyl)pyridine;

(S)-2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-ol;

(R)-2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-ol;

2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-one;

(E/Z)-2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-one oxime;

4-((5-Methyl-2-(2,2,2-trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

(S)-2,2,2-trifluoro-1-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(R)-2,2,2-trifluoro-1-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(S)-2,2,2-Trifluoro-N-methyl-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(R)-2,2,2-Trifluoro-N-methyl-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(S)-2,2,2-Trifluoro-N,N-dimethyl-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(R)-2,2,2-Trifluoro-N,N-dimethyl-1-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)ethan-1-amine;

(E/Z)-2, 2,2-Trifluoro-1-(4-(pyridin-4-ylmethyl)thiazol-2-yl)ethan-1-one oxime;

(R)-2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)thiazol-2-yl)ethan-1-amine;

(S)-2,2,2-Trifluoro-1-(5-(pyridin-4-ylmethyl)thiazol-2-yl)ethan-1-amine;

(S)-(4-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)(thiazol-5-yl)methanol;

(R)-(4-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)(thiazol-5-yl)methanol;

(5-((3-Methylpyridin-4-yl)methyl)-1H-imidazol-2-yl)(thiazol-5-yl)methanol;

3,5-Dichloro-4-((2-(2,2,2-trifluoroethyl)-1H-imidazol-5-yl)methyl)pyridine;

1-(4-((3-Chloropyridin-4-yl)methyl)-1H-imidazol-2-yl)-2,2,2-trifluoroethan-1-ol;

(S)-2,2,2-trifluoro-1-(4-((S)-1-(pyridin-4-yl)ethyl)-1H-imidazol-2-yl)ethan-1-ol;

(R)-2,2,2-trifluoro-1-(4-((S)-1-(pyridin-4-yl)ethyl)-1H-imidazol-2-yl)ethan-1-ol;

(S)-2,2,2-trifluoro-1-(4-((R)-1-(pyridin-4-yl)ethyl)-1/-imidazol-2-yl)ethan-1-ol;

(R)-2,2,2-trifluoro-1-(4-((R)-1-(pyridin-4-yl)ethyl)-1H-imidazol-2-yl)ethan-1-ol;

3-Methyl-4-((2-(2,2,2-trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

(R)-2,2,2-Trifluoro-1-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)-1-(thiazol-5-yl)ethan-1-ol;

(S)-2,2,2-Trifluoro-1-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)-1-(thiazol-5-yl)ethan-1-ol;

3-Chloro-4-((2-(2,2,2-trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

2-Chloro-4-((2-(2,2,2-trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

2-Fluoro-4-((2-(2,2,2-trifluoroethyl)-3H-imidazol-4-yl)methyl)pyridine;

(S)-(5-((3-Methylpyridin-4-yl)methyl)-1H-imidazol-2-yl)(thiazol-5-yl)methanol;

(R)-(5-((3-Methylpyridin-4-yl)methyl)-1H-imidazol-2-yl)(thiazol-5-yl)methanol;

(R)-(5-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)(thiazol-2-yl)methanol;

(S)-(5-(Pyridin-4-ylmethyl)-1H-imidazol-2-yl)(thiazol-2-yl)methanol;

(R)-1,1,1-Trifluoro-2-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)propan-2-ol;

(S)-1,1,1-Trifluoro-2-(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)propan-2-ol;

(S)-4-((2-(2,2,2-trifluoro-1-methoxyethyl)-1H-imidazol-5-yl)methyl)pyridine;

(R)-4-((2-(2,2,2-trifluoro-1-methoxyethyl)-1H-imidazol-5-yl)methyl)pyridine;

(R)-2,2,2-Trifluoro-1-(5-((2-fluoropyridin-4-yl)methyl)-1H-imidazol-2-yl)ethan-1-ol;

(S)-2,2,2-Trifluoro-1-(5-((2-fluoropyridin-4-yl)methyl)-1H-imidazol-2-yl)ethan-1-ol;

Pyridin-2-yl(5-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)methanol;

3-Fluoro-4-((2-(2,2,2-trifluoroethyl)-1H-imidazol-4-yl)methyl)pyridine;

(S)-2,2,2-Trifluoro-1-(4-((3-methylpyridin-4-yl)methyl)-1H-imidazol-2-yl)ethan-1-ol;

(R)-2,2,2-Trifluoro-1-(4-((3-methylpyridin-4-yl)methyl)-1H-imidazol-2-yl)ethan-1-ol;

(S)-2,2,2-Trifluoro-1-(4-((3-fluoropyridin-4-yl)methyl)-1/-imidazol-2-yl)ethan-1-ol;

(R)-2,2,2-Trifluoro-1-(4-((3-fluoropyridin-4-yl)methyl)-1H-imidazol-2-yl)ethan-1-ol;

1,1,1,3,3,3-Hexafluoro-2-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)propan-2-ol; and

1,1,1-Trifluoro-2-(4-(pyridin-4-ylmethyl)-1H-imidazol-2-yl)propan-2-ol;

or a pharmaceutically acceptable salt of any of the aforementioned; wherein the neurological disorder is selected from amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), diabetic neuropathy, traumatic brain injury (TBI), ocular neuropathy, Parkinson's disease, Alzheimer's disease, and peripheral neuropathy.

19. The method of claim 1 , comprising administering to the patient a further pharmaceutically active agent.