Compounds

1. A compound of Formula (I-3) or a pharmaceutically acceptable salt thereof:

wherein

R 1 is selected from the group consisting of H, C 1-3 alkyl and —C(O)—C 1-3 alkyl; and

R 2 and R 3 together with the carbon to which they are attached form a 4, 5 or 6 membered saturated ring, which ring

optionally contains one heteroatom ring member selected from N or O, and

is optionally substituted with one substituent of -L-K, wherein

L is selected from the group consisting of C(O), CH 2 , and S(O) 2 , and

K is selected from the group consisting of C 1-3 alkyl, phenyl, and C 3-6 cycloalkyl;

or R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 5-membered saturated heterocyclic ring, which ring

optionally contains one or two additional heteroatom ring member independently selected from the group consisting of N, O, C(O), S, S(O), and S(O) 2 , and

is optionally substituted with one or more substituents independently selected from the group consisting of OH, halo, NR 1a R 1b , COOH, and —Y—R c , wherein

Y is absent or is selected from the group consisting of C(O), S(O) 2 , —C(O)—C(O)—, and CH 2 , and

R c is selected from the group consisting of

C 1-5 alkyl optionally substituted with one or more substituents independently selected from the group consisting of NR 2a R 2b , C 3-6 cycloalkyl, and —COOH,

C 1-3 haloalkyl,

C 1-3 alkoxyl,

NR 3a R 3b ,

—(CH 2 ) p —C(O)—O—C 1-3 alkyl, wherein p is 1, 2, or 3 and the —(CH 2 ) p — is optionally substituted by one or more methyl,

—(CH 2 ) q —C 3-6 cycloalkyl wherein q is 1, 2, or 3, the cycloalkyl is optionally substituted with NR 4a R 4b , and the —(CH 2 ) q — is optionally substituted by one or more methyl, and

heterocyclyl optionally substituted with one or more substituents independently selected from the group consisting of halo and NR 5a R 5b ,

wherein R 1a , R 1b , R 2a , R 2b , R 3a , R 3b , R 4a , R 4b , R 5a , and R 5b are independently H or C 1-3 alkyl; and

R 3 is H;

each occurrence of R 4 is independently H or D;

X is absent or is selected from the group consisting of

—O—,

—NH—, and

—N (C 1-3 alkyl)-,

n is 1 or 2

X is —O—CH 2 — bicyclo[1.1.1]pentanyl-CH 2 —O— and n is 0;

A is unsubstituted thiophenyl, or

A is

wherein

R 5 and R 9 are independently H or halo,

Z′ is N or CR 6 ,

Z is N or CR 8 ,

wherein R 6 and R 8 are independently selected from the group consisting of H, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl and —S(O)—C 1-3 alkyl, and

V is N or CR 7 , wherein R 7 is selected from the group consisting of H, halo, CN, C 1-3 alkyl, C 1-3 haloalkyl, and —S(O) 2 —C 1-3 alkyl, or R 7 is -Q-(CH 2 ) m —W,

wherein

Q is O, N, or CH 2 ,

m is 0 or 1, and

W is selected from the group consisting of C 3-6 cycloalkyl, heterocyclyl, 5 membered heteroaryl and phenyl, wherein said cycloalkyl, heterocyclyl, heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl;

or when Z or Z′ is CR 6 and V is CR 7 , R 6 and R 7 together may form a 4,7-dioxaspiro[2.6]nonane,

with the proviso that the compound of Formula (I-3) is not

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclobutane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile,

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclopentane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile, or

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclohexane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile.

2. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein

R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 5-membered saturated, unsubstituted ring, which ring optionally contains one additional heteroatom ring member selected from N, O and C(O); and

R 3 is H;

R 4 is H;

X is O;

n is 1 or 2; and

A is

wherein

R 5 and R 9 are independently H or halo,

Z′ is N or CR 6 ,

Z is N or CR 8 ,

wherein R 6 and R 8 are independently selected from the group consisting of H, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl and —S(O)—C 1-3 alkyl, and

V is N or CR 7 , wherein R 7 is selected from the group consisting of H, halo, CN, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl, or R 7 is -Q-(CH 2 ) m —W, wherein

Q is O, N, or CH 2 ,

m is 0 or 1, and

W is selected from the group consisting of C 3-6 cycloalkyl, heterocyclyl, 5 membered heteroaryl and phenyl, wherein said cycloalkyl, heterocyclyl, heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl.

3. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 5-membered saturated ring, which ring optionally contains one additional heteroatom ring member selected from N, O and C(O), and R 3 is H.

4. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 5 membered unsubstituted, saturated heterocycle, which contains no additional heteroatom ring member, and R 3 is H.

5. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein R 4 is H.

6. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein X is O.

7. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein n is 1.

8. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein A is

wherein

R 5 and R 9 are independently H or F, and

R 6 and R 8 are independently selected from the group consisting of H, CN, and F, and

R 7 is —O—W, wherein

W is 5 membered heteroaryl or phenyl, wherein said heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl.

9. The compound or a pharmaceutically acceptable salt thereof according to claim 1 , wherein A is

wherein

R 5 and R 9 are independently H or F, and

R 6 and R 8 are independently selected from the group consisting of H, CN, and F, and

R 7 is —O—W, wherein W is pyrazolyl or phenyl, wherein said pyrazolyl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of CF 3 and CH 3 .

10. The compound or pharmaceutically acceptable salts thereof according to claim 1 has the following structure:

wherein

R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 5-membered saturated ring, which ring optionally contains one additional heteroatom ring member selected from the group consisting of N, O, and C(O), and which ring has no further substitution;

R 5 and R 9 are independently H or F;

R 6 and R 8 are independently selected from the group consisting of H or F; and

W 1 is selected from the group consisting of pyrazolyl and phenyl, wherein said pyrazolyl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of CF 3 and CH 3 .

11. A compound or a pharmaceutically acceptable salt thereof has the structure of Formula (I-4)

wherein

R 1 is selected from the group consisting of H, C 1-3 alkyl and —C(O)—C 1-3 alkyl; and

R 2 and R 3 together with the carbon to which they are attached form a 4, 5 or 6 membered saturated ring, which ring

optionally contains one heteroatom ring member selected from N or O, and

is optionally substituted with one substituent of -L-K, wherein

L is selected from the group consisting of C(O), CH 2 , and S(O) 2 , and

K is selected from the group consisting of C 1-3 alkyl, phenyl, and C 3-6 cycloalkyl;

or R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 6-membered saturated ring, which ring

optionally contains one or two additional heteroatom ring member independently selected from the group consisting of N, O, C(O), S, S(O), and S(O) 2 , and

is optionally substituted with one or more substituents independently selected from the group consisting of OH, halo, NR 1a R 1b , COOH, and —Y—R c , wherein

Y is absent or is selected from the group consisting of C(O), S(O) 2 , —C(O)—C(O)—, and CH 2 , and

R c is selected from the group consisting of

C 1-5 alkyl optionally substituted with one or more substituents independently selected from the group consisting of NR 2a R 2b , C 3-6 cycloalkyl, and —COOH,

C 1-3 haloalkyl,

C 1-3 alkoxyl,

NR 3a R 3b ,

—(CH 2 ) p —C(O)—O—C 1-3 alkyl, wherein p is 1, 2, or 3 and the —(CH 2 ) p — is optionally substituted by one or more methyl,

—(CH 2 ) q —C 3-6 cycloalkyl, wherein q is 1, 2, or 3, the cycloalkyl is optionally substituted with NR 4a R 4b , and the —(CH 2 ) q — is optionally substituted by one or more methyl, and

heterocyclyl optionally substituted with one or more substituents independently selected from the group consisting of halo and NR 5a R 5b ,

wherein R 1a , R 1b , R 2a , R 2b , R 3a , R 3b , R 4a , R 4b , R 5a , and R 5b are independently H or C 1-3 alkyl; and

R 3 is H;

each occurrence of R 4 is independently H or D;

X is absent or is selected from the group consisting of

—O—,

—NH—, and

—N (C 1-3 alkyl)-,

n is 1 or 2;

X is —O—CH 2 — bicyclo[1.1.1]pentanyl-CH 2 —O— and n is 0; and

A is unsubstituted thiophenyl, or

A is

wherein

R 5 and R 9 are independently H or halo,

Z′ is N or CR 6 ,

Z is N or CR 8 ,

wherein R 6 and R 8 are independently selected from the group consisting of H, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl and —S(O)—C 1-3 alkyl, and

V is N or CR 7 , wherein R 7 is selected from the group consisting of H, halo, CN, C 1-3 alkyl, C 1-3 haloalkyl, and —S(O) 2 —C 1-3 alkyl, or R 7 is -Q-(CH 2 ) m —W,

wherein

Q is O, N, or CH 2 ,

m is 0 or 1, and

W is selected from the group consisting of C 3-6 cycloalkyl, heterocyclyl, 5 membered heteroaryl and phenyl, wherein said cycloalkyl, heterocyclyl, heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl;

or when Z or Z′ is CR 6 and V is CR 7 , R 6 and R 7 together may form a 4,7-dioxaspiro[2.6]nonane;

with the proviso that the compound of Formula (I-4) is not

2-fluoro-5-(((9-oxo-2,3,4,9,11,11a-hexahydro-1H-pyrazino[1′,2′:3,4]imidazo[1,2-c]pyrimidin-7-yl)oxy)methyl)benzonitrile,

7-(2,3-difluorophenethyl)-3,4,11,11a-tetrahydro-1H-pyrazino[1′,2′:3,4]imidazo[1,2-c]pyrimidin-9(2H)-one,

7-((2,3-difluorobenzyl)amino)-11,11a-dihydro-1H-pyrazino[1′,2′:3,4]imidazo[1,2-c]pyrimidine-3,9(2H,4H)-dione,

7-((3,4-difluorobenzyl)amino)-3,4,11,11a-tetrahydropyrimido[6′,1′:2,3]imidazo[5,1-c][1,4]thiazin-9(1H)-one 2,2-dioxide,

7-((2,3-difluorobenzyl)amino)-3,4,11,11a-tetrahydropyrimido[6′,1′:2,3]imidazo[5,1-c][1,4]thiazin-9(1H)-one-2-oxide,

7-((2,3-difluorobenzyl)amino)-3,4,11,11a-tetrahydropyrimido[6′,1′:2,3]imidazo[5,1-c][1,4]thiazin-9(1H)-one-2,2-dioxide,

7-(2,3-Difluorophenethyl)-3,4,11,11a-tetrahydropyrimido[6′,1′:2,3]imidazo[5,1-c][1,4]thiazin-9(1H)-one,

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclobutane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile,

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclopentane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile, or

4-(((1′-methyl-5′-oxo-3′,5′-dihydro-1′H-spiro[cyclohexane-1,2′-imidazo[1,2-c]pyrimidin]-7′-yl)oxy)methyl)benzonitrile.

12. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein

R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 6-membered saturated, unsubstituted ring, which ring contains one additional heteroatom ring member selected from N, O and C(O); and

R 3 is H;

R 4 is H;

X is O;

n is 1 or 2; and

A is

wherein

R 5 and R 9 are independently H or halo,

Z′ is N or CR 6 ,

Z is N or CR 8 ,

wherein R 6 and R 8 are independently selected from the group consisting of H, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl and —S(O)—C 1-3 alkyl, and

V is N or CR 7 , wherein R 7 is selected from the group consisting of H, halo, CN, C 1-3 alkyl, C 1-3 haloalkyl, —S(O) 2 —C 1-3 alkyl, or R 7 is -Q-(CH 2 ) m —W, wherein

Q is O, N, or CH 2 ,

m is 0 or 1, and

W is selected from the group consisting of C 3-6 cycloalkyl, heterocyclyl, 5 membered heteroaryl and phenyl, wherein said cycloalkyl, heterocyclyl, heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl,

with the proviso that the compound of Formula (III-4) is not

2-fluoro-5-(((9-oxo-2,3,4,9,11,11a-hexahydro-1H-pyrazino[1′,2′:3,4]imidazo[1,2-c]pyrimidin-7-yl)oxy)methyl)benzonitrile, or

7-(2,3-difluorophenethyl)-3,4,11,11a-tetrahydro-1H-pyrazino[1′,2′: 3,4]imidazo[1,2-c]pyrimidin-9(2H)-one.

13. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 6-membered saturated ring, which ring optionally contains one additional heteroatom ring member selected from N, O and C(O), and R 3 is H.

14. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein R 4 is H.

15. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein X is O.

16. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein n is 1.

17. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein A is

wherein

R 5 and R 9 are independently H or F, and

R 6 and R 8 are independently selected from the group consisting of H, CN, and F, and

R 7 is —O—W, wherein

W is 5 membered heteroaryl or phenyl, wherein said heteroaryl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of C 1-3 haloalkyl, CN, halo and C 1-5 alkyl.

18. The compound or a pharmaceutically acceptable salt thereof according to claim 11 , wherein A is

wherein

R 5 and R 9 are independently H or F, and

R 6 and R 8 are independently selected from the group consisting of H, CN, and F, and

R 7 is —O—W, wherein W is pyrazolyl or phenyl, wherein said pyrazolyl or phenyl is optionally substituted with one or more substituents independently selected from the group consisting of CF 3 and CH 3 .

19. The compound or a pharmaceutically acceptable salt thereof according to claim 11 is Formula (A-4),

wherein

R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 6-membered saturated ring, which ring contains one additional heteroatom ring member selected from the group consisting of N, O, and C(O), and which ring has no further substitution;

R 5 and R 9 are independently H or F;

R 6 and R 8 are independently selected from the group consisting of H or F; and

W 1 is selected from the group consisting of pyrazolyl and phenyl, wherein said pyrazolyl or phenyl is optionally substituted with one or two substituents independently selected from the group consisting of CF 3 and CH 3 .

20. The compound or a pharmaceutically acceptable salt thereof according to claim 11 is Formula (A-5),

wherein

R 1 and R 2 together with the nitrogen and carbon to which they are attached form a 6-membered saturated ring, which ring contains one additional heteroatom ring member selected from the group consisting of O and which ring has no further substitution;

R 5 and R 9 are independently H or F;

R 6 and R 8 are independently selected from the group consisting of H or F; and

W 1 is selected from the group consisting of pyridinyl, primidinyl, pyrazolyl and phenyl, wherein said pyrazolyl or phenyl is optionally substituted with one or two substituents independently selected from the group consisting of CF 3 and CH 3 .

21. A pharmaceutical composition comprising a compound or a pharmaceutically acceptable salt thereof according to claim 1 , and a pharmaceutically acceptable excipient.

22. A method for treating neurodegeneration disease in a subject in need thereof comprising administering to the subject a therapeutically effective amount of a compound or a pharmaceutically acceptable salt thereof according to claim 1 .

23. The method according to claim 22 , wherein the neurodegeneration disease is Alzheimer's disease.

24. A method for treating atherosclerosis in a subject in need thereof comprising administering to the subject a therapeutically effective amount of a compound or a pharmaceutically acceptable salt thereof according to claim 1 .

25. The method according to claim 22 , wherein the subject is a human.

26. A pharmaceutical composition comprising a compound or a pharmaceutically acceptable salt thereof according to claim 11 , and a pharmaceutically acceptable excipient.

27. A method for treating neurodegeneration disease in a subject in need thereof comprising administering to the subject a therapeutically effective amount of a compound or a pharmaceutically acceptable salt thereof according to claim 11 .

28. The method according to claim 27 , wherein the neurodegeneration disease is Alzheimer's disease.

29. A method for treating atherosclerosis in a subject in need thereof comprising administering to the subject a therapeutically effective amount of a compound or a pharmaceutically acceptable salt thereof according to claim 11 .

30. The method according to claim 27 , wherein the subject is a human.