申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04743601A1
公开(公告)日:1988-05-10
There are disclosed novel compounds of the formula ##STR1## where X is hydrogen, loweralkyl, loweralkoxy, hydroxy, halogen, nitro or trifluoromethyl; R.sub.1 is hydrogen or loweralkyl; R.sub.2 is hydrogen, loweralkyl, arylloweralkyl or --(CH.sub.2).sub.m R.sub.7 wherein m is 1, 2 or 3 and R.sub.7 is cyano or amino; R.sub.3 and R.sub.4 are independently hydrogen or loweralkyl; R.sub.5 and R.sub.6 are independently hydrogen or loweralkyl, or R.sub.5 +R.sub.6 taken together with the carbon atom to which they are attached constitute a cyclobutane, cyclopentane, cyclohexane, cycloheptane, pyrrolidine, piperidine, morpholine or thiomorpholine ring, or R.sub.5 is hydrogen and R.sub.6 is aryl or --CH.sub.2 OR.sub.8 wherein R.sub.8 is hydrogen, loweralkyl or loweralkylcarbonyl, which are useful for enhancing memory.
揭示了一种新型化合物,其化学式为##STR1## 其中X是氢、较低烷基、较低烷氧基、羟基、卤素、硝基或三氟甲基;R.sub.1是氢或较低烷基;R.sub.2是氢、较低烷基、芳基较低烷基或--(CH.sub.2).sub.m R.sub.7,其中m为1、2或3,R.sub.7是氰基或氨基;R.sub.3和R.sub.4独立地是氢或较低烷基;R.sub.5和R.sub.6独立地是氢或较低烷基,或R.sub.5 +R.sub.6与它们连接的碳原子一起构成环丁烷、环戊烷、环己烷、环庚烷、吡咯烷、哌啶、吗啉或硫代吗啉环,或者R.sub.5是氢,R.sub.6是芳基或--CH.sub.2 OR.sub.8,其中R.sub.8是氢、较低烷基或较低烷基羰基,这些化合物有助于增强记忆。