This invention relates to 4- and 6-carbamates related to physostigmine of the formula ##STR1## where R.sub.1 is alkyl, cycloalkyl, bicycloalkyl, aryl or arylloweralkyl; R.sub.2 is hydrogen or alkyl or the group --NR.sub.1 R.sub.2 taken together forms a monocyclic or bicyclic ring of 5 to 12 carbons; m is 0,1, or 2; each X is independently hydrogen, halogen, loweralkyl, nitro or amino; and the pharmaceutically acceptable acid addition salts thereof, and where applicable, the geometric and optical isomers and racemic mixtures thereof. This invention also relates to novel intermediates useful in the preparation of the 4- and 6-carbamates. The compounds of this invention display utility for alleviating various memory dysfunctions characterized by a decreased cholinergic function, such as Alzheimer's disease.
该发明涉及与生理斯的
胆碱酯酶有关的4-和6-
碳酸酯,其
化学式为##STR1##其中R.sub.1是烷基,环烷基,双环烷基,芳基或芳基烷基;R.sub.2是氢或烷基或基团--NR.sub.1 R.sub.2结合在一起形成5到12个碳原子的单环或双环环;m为0,1或2;每个X独立地是氢,卤素,低烷基,硝基或
氨基;及其药用酸盐,必要时还包括其几何和光学异构体以及消旋混合物。该发明还涉及在制备4-和6-
碳酸酯时有用的新中间体。该发明的化合物显示出对缓解各种记忆功能障碍的效用,这些障碍以
胆碱能功能减少为特征,例如阿尔茨海默病。