申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:US05019574A1
公开(公告)日:1991-05-28
4-aminopyridine derivatives represented by the general formula: ##STR1## [wherein R.sub.1 is a hydrogen atom, a hydroxyl group, a linear or branched lower alkyl group or a cycloalkyl group which may be substituted by a hydroxyl group, a lower alkoxy group, a lower alkyl or a cycloalkyl group which contains a carbonyl group, a morpholino group or a group --NH--B (where B is a lower alkyl group, a cycloalkyl group or a phenyl group); R.sub.2 and R.sub.3 which may be the same or different each represents a hydrogen atom, a lower alkyl group or a loweralkylcarbonyl group, or when taken together, form an azacycloalkyl group, a morpholino group or an N-methylpiperazinyl group together with the nitrogen atom; R.sub.4 and R.sub.5 each represents a hydrogen atom, or when taken together with the ring A, form a quinoline ring or a 5,6,7,8-tetrahydroquinoline ring, provided that when each of R.sub.1, R.sub.4 and R.sub.5 is a hydrogen atom, R.sub.2 and R.sub.3 are neither a hydrogen atom nor a methyl group at the same time, and when R.sub.1 is a hydrogen atom and R.sub.4 and R.sub.5 taken together with the ring A form a quinoline ring, R.sub.2 and R.sub.3 are neither a hydrogen atom nor an ethyl group at the same time], and an acid addition salts of said 4-aminopyridine derivatives. These compounds are useful as active ingredients in pharmaceutical compositions for improving psychoneural function, especially in the treatment of Alzheimer type dementia and promotion of mnemonic and learning performance.
通用公式表示的4-氨基吡啶衍生物:[其中R.sub.1是氢原子,羟基,线性或支链低碳基团或环碳基团,可被羟基,低碳氧基,含有羰基的低碳基团,吗啉基或基团--NH--B(其中B是低碳基团,环碳基团或苯基)替代;R.sub.2和R.sub.3可能相同或不同,分别表示氢原子,低碳基团或低碳基酰基团,或者当两者在一起时,与氮原子一起形成氮杂环碳基团,吗啉基或N-甲基哌嗪基;R.sub.4和R.sub.5分别表示氢原子,或者与环A一起形成喹啉环或5,6,7,8-四氢喹啉环,条件是当R.sub.1,R.sub.4和R.sub.5中的每一个是氢原子时,R.sub.2和R.sub.3同时不是氢原子或甲基基团,当R.sub.1是氢原子且R.sub.4和R.sub.5与环A一起形成喹啉环时,R.sub.2和R.sub.3同时不是氢原子或乙基基团],以及所述4-氨基吡啶衍生物的酸盐。这些化合物可用作改善心理神经功能的药物组合物中的活性成分,特别是在治疗阿尔茨海默型痴呆症和促进记忆和学习表现方面。