申请人:Hoechst-Roussel Pharmaceuticals Incorporated
公开号:US05264587A1
公开(公告)日:1993-11-23
This invention relates to compounds of the formula ##STR1## where X is --NH, oxygen, N-loweralkyl, or N-arylloweralkyl; R.sub.1 is hydrogen, loweralkyl, cycloalkyl, aryl, arylloweralkyl, loweralkylene, haloloweralkyl, heteroaryl selected from the group consisting of thienyl, furanyl, pyrrolyl and pyridinyl; heteroarylloweralkyl, heterocyclic selected from piperidinyl, piperazinyl, pyrrolidinyl; or heterocyclicloweralkyl; R.sub.2 is hydrogen or loweralkyl; R.sub.3 is loweralkyl or arylloweralkyl; R.sub.4 is hydrogen, loweralkyl, loweralkenyl, loweralkynyl, arylloweralkyl, formyl, loweralkylcarbonyl, arylloweralkylcarbonyl or loweralkoxycarbonyl; Y is hydrogen, loweralkyl or loweralkoxy, and the pharmaceutically acceptable acid addition salts thereof, and where applicable, the geometric and optical isomers and racemic mixtures thereof. The compounds of this invention are useful in the treatment of memory impairment characterized by a cholinergic deficit such as that associated with electroshock-induced amnesia and Alzheimer's disease and other senile dementia.
本发明涉及以下式子的化合物:##STR1## 其中X是--NH、氧、N-较低烷基或N-芳基较低烷基;R.sub.1是氢、较低烷基、环烷基、芳基、芳基较低烷基、较低烷基亚基、卤代较低烷基、从噻吩基、呋喃基、吡咯基和吡啶基组成的杂芳基;杂芳基较低烷基、从哌啶基、哌嗪基、吡咯烷基中选择的杂环基或杂环较低烷基;R.sub.2是氢或较低烷基;R.sub.3是较低烷基或芳基较低烷基;R.sub.4是氢、较低烷基、较低烯基、较低炔基、芳基较低烷基、甲酰基、较低烷基羰基、芳基较低烷基羰基或较低烷氧羰基;Y是氢、较低烷基或较低烷氧基,以及其药学上可接受的酸盐,适用时还包括其几何和光学异构体及其外消旋混合物。本发明的化合物适用于治疗由胆碱能缺陷所表现的记忆障碍,例如与电击诱导的遗忘和老年痴呆症等相关的病症。