申请人:Hoechst-Roussel Pharmaceuticals, Inc.
公开号:US04789678A1
公开(公告)日:1988-12-06
There are described compounds of the formula ##STR1## where X is hydrogen, halogen, loweralkyl, loweralkoxy or trifluoromethyl; R is ##STR2## R.sub.4 being loweralkyl; R.sub.1 is hydrogen, loweralkyl or arylloweralkyl; R.sub.2 is hydrogen, loweralkyl or arylloweralkyl; and R.sub.3 is loweralkyl, with the proviso that when R is acetyl, R.sub.3 is methyl and X is hydrogen, R.sub.1 and R.sub.2 are not both hydrogen, or pharmaceutically acceptable acid addition salts thereof, which are useful in the treatment of various memory dysfunctions characterized by decreased cholinergic function.
公式的化合物##STR1##中,X代表氢,卤素,低级烷基,低级烷氧基或三氟甲基;R代表##STR2##,其中R.sub.4是低级烷基;R.sub.1是氢,低级烷基或芳基低级烷基;R.sub.2是氢,低级烷基或芳基低级烷基;R.sub.3是低级烷基,但需注意当R是乙酰基,R.sub.3是甲基且X是氢时,R.sub.1和R.sub.2不能同时是氢;或者是其医药上可接受的酸性加成盐,这些化合物在治疗各种以胆碱能功能降低为特征的记忆功能障碍方面是有用的。