| 摘要 |
The invention relates to a 2-(diaza-bicyclo-alkyl)-pyrimidone derivative represented by formula (I) or a salt thereof: wherein: R1 represents a hydrogen atom, a C1-6 alkyl group or a halogen atom; R2 represents a hydrogen atom, a C1-6 alkyl group optionally substituted; a C 1-2 perhalogenated alkyl group, a benzyl group, a phenethyl group, a benzyloxycarbonyl group, a C 1-4 alkoxy carbonyl group, a benzene ring, a naphthalene ring, a quinoline ring, a phthalazine ring, a 5,6,7,8-tetrahydronaphthalene ring, a pyridine ring, an indole ring, a pyrrole ring, a thiophene ring, a benzenesulfonyl group, a benzoyl group, a pyridazine ring, a furan ring or an imidazole ring; the benzyl group, the phenethyl group, the benzyloxycarbonyl group, the benzenesulfonyl group, the benzoyl group and the rings being optionally substituted; R3 represents a 2, 4 or 5-pyrimidine ring or a 2, 3 or 4-pyridine ring, the rings being optionally substituted; R4 represents a C 1-4 alkyl group and n represents 1 or 2. The invention relates also to a medicament comprising the said derivative or a salt thereof as an active ingredient which is used for preventive and/or therapeutic treatment of a neurodegenerative disease caused by abnormal activity of GSK3.beta., such as Alzheimer disease.
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