申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04983616A1
公开(公告)日:1991-01-08
There are disclosed various compounds of the formula below, ##STR1## where X is O, S, NH, H-loweralkyl, or N-arylloweralkyl; Y is hydrogen, fluorine, chlorine, bromine, nitro, loweralkyl, loweralkoxy, or triloweralkylsilyl; R.sub.1 is loweralkyl, halogen-substituted loweralkyl, aryl, arylloweralkyl, cycloalkyl, heteroaryl or heteroarylloweralkyl; R.sub.2 is hydrogen, loweralkyl or arylloweralkyl; R.sub.3 is loweralkyl or arylloweralkyl; R.sub.4 is hydrogen, loweralkyl, loweralkenyl, loweralkynyl, arylloweralkyl, formyl, loweralkylcarbonyl, arylloweralkylcarbonyl or loweralkoxycarbonyl; R.sub.5 is hydrogen or loweralkyl; and m is 0 or 1, with the proviso that when m is O, R.sub.1 may also be hydrogen, which compounds are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.
下面公式中披露了各种化合物,其中 X 为 O、S、NH、H-较低烷基或 N-芳基较低烷基;Y 为氢、氟、氯、溴、硝基、较低烷基、较低烷氧基或三较低烷基硅基;R.sub.1 为较低烷基、卤素取代的较低烷基、芳基、芳基较低烷基、环烷基、杂环芳基或杂环芳基较低烷基;R.sub.2 为氢、较低烷基或芳基较低烷基;R.sub.3 为较低烷基或芳基较低烷基;R.sub.4 为氢、较低烷基、较低烯烃基、较低炔烃基、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;R.sub.5 为氢或较低烷基;m 为 0 或 1,但当 m 为 0 时,R.sub.1 也可以是氢。这些化合物对缓解由胆碱能缺陷所表征的各种记忆功能障碍,如阿尔茨海默病,具有益处。