Use of 8-substituted-6,7,8,9-tetrahydropyrimido[1,2-a] pyrimidin-4-one derivatives

1. A method of treating a disease in a patient, said disease selected from the group consisting of acute stroke, traumatic injury, cerebrovascular accident, brain cord trauma, spinal cord trauma, peripheral neuropathy, retinopathy, glaucoma, alopecia, Pick's disease, progressive supranuclear palsy, age related macular degeneration, breast cancer and thyroid cancer, comprising administering to said patient a therapeutically effective amount of a compound of formula (I) or a pharmaceutically acceptable salt thereof:

wherein:

X represents two hydrogen atoms, a sulfur atom, an oxygen atom or a C 1-2 alkyl group and a hydrogen atom;

Y represents a bond, a carbonyl group, a methylene group optionally substituted by one or two groups chosen from a C 1-6 alkyl group, a hydroxyl group, a C 1-4 alkoxy group, a C 1-2 perhalogenated alkyl group or an amino group;

R1 represents a 2, 3 or 4-pyridine ring or a 2, 4 or 5-pyrimidine ring, the rings being optionally substituted by a C 1-4 alkyl group, a C 1-4 alkoxy group or a halogen atom;

R2 represents a phenyl group or a naphthalene ring; the phenyl group or the naphthalene ring being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a methylenedioxy group, a halogen atom, a C 1-2 perhalogenated alkyl group, a C 1-3 halogenated alkyl group, a hydroxyl group, a C 1-4 alkoxy group, a nitro, a cyano, an amino, a C 1-5 monoalkylamino group, a C 2-10 dialkylamino group, a phenyl group, a pyrrolidine ring, a piperidine ring or an azepine ring;

R3 represents a hydrogen atom or a C 1-6 alkyl group;

R4 represents a phenyl group, a naphthalene ring or a pyridinyl group, the groups and the ring being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a methylenedioxy group, a halogen atom, a C 1-2 perhalogenated alkyl group, a C 1-3 halogenated alkyl group, a hydroxyl group, a C 1-4 alkoxy group, a nitro, a cyano, an amino, a C 1-5 monoalkylamino group or a C 2-10 dialkylamino group;

R5 represents a hydrogen atom, a C 1-6 alkyl group or a halogen atom;

n represents 0 to 3; and p+q=0-3.

2. The method according to claim 1 , wherein R4 represents a phenyl group or a pyridinyl group.

3. The method according to claim 2 , wherein

R1 represents an unsubstituted 4-pyridinyl ring or a 4-pyrimidinyl ring;

R2 represents a phenyl group or a naphthalene ring, the phenyl group and the naphthalene ring being optionally substituted by 1 to 4 substituents selected from a C 1-3 alkyl group, a halogen atom, a hydroxyl group, a C 1-2 alkoxy group, a phenyl group, a pyrrolidine ring, a piperidine ring or an azepine ring;

R3 represents a hydrogen atom;

R5 represents a hydrogen atom;

X represents two hydrogen atoms;

Y represents a carbonyl group or a methylene group optionally substituted by a hydroxyl group; and

n, p and q represent 0, 2 and 0, respectively.

4. The method according to claim 1 , wherein the compound of formula (I) is selected from the group consisting of:

1′-[(2S)-2-hydroxy-2-phenyl-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-oxo-2-phenyl-ethyl)-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-bromo-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(4-chloro-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(4-fluoro-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-fluoro-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(4-methoxy-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(oxo-2-(4-pyrrolidin-1-yl-phenyl)-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-biphenyl-4-yl-2-oxo-ethyl)-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-oxo-2-p-tolyl-ethyl)-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-naphthalen-2-yl-2-oxo-ethyl)-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-methoxy-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(2-methoxy-phenyl)-2-oxo-ethyl]-8-phenyl-2-(4-pyridinyl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[(2S)-2-oxo-2-phenyl-ethyl]-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-bromo-phenyl)-2-oxo-ethyl]-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-hydroxy-2-phenyl-ethyl)-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-bromo-phenyl)-2-hydroxy-ethyl]-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-fluoro-phenyl)-2-oxo-ethyl]-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-hydroxy-2-(4-methoxy-phenyl)-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-(2-hydroxy-2-p-tolyl-ethyl)-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

(−)-9-(2-oxo-2-phenyl-ethyl)-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrimido[1.2-a]pyrimidin-4-one;

(+)-9-(2-oxo-2-phenyl-ethyl)-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-4H-pyrimido[1.2-a]pyrimidin-4-one;

9-[2-hydroxy-2-(3-bromo-phenyl)-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-hydroxy-2-(4-chloro-phenyl)-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-(3-fluoro-phenyl)-2-hydroxy-ethyl]-2,8-dipyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-hydroxy-2-(4-fluoro-phenyl)-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

9-[2-hydroxy-2-(4-phenyl-phenyl)-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one; and

9-[2-hydroxy-2-naphthalen-2-yl-ethyl]-8-phenyl-2-pyridin-4-yl-6,7,8,9-tetrahydro-pyrimido[1,2-a]pyrimidin-4-one;

or a salt thereof.

5. The method according to claim 1 , wherein the disease is acute stroke.

6. The method according to claim 1 , wherein the disease is traumatic injury.

7. The method according to claim 1 , wherein the disease is cerebrovascular accident.

8. The method according to claim 1 , wherein the disease is brain cord trauma.

9. The method according to claim 1 , wherein the disease is spinal cord trauma.

10. The method according to claim 1 , wherein the disease is peripheral neuropathy.

11. The method according to claim 1 , wherein the disease is retinopathy.

12. The method according to claim 1 , wherein the disease is glaucoma.

13. The method according to claim 1 , wherein the disease is alopecia.

14. The method according to claim 1 , wherein the disease is Pick's disease.

15. The method according to claim 1 , wherein the disease is progressive supranuclear palsy.

16. The method according to claim 1 , wherein the disease is age related macular degeneration.

17. The method according to claim 1 , wherein the disease is breast cancer.

18. The method according to claim 1 , wherein the disease is thyroid cancer.