N-AMINOCARBAMATES RELATED TO PHYSOSTIGMINE,A PROCESS FOR THEIR PREPARATION AND THEIR USE AS MEDICAMENTS

摘要

The present invention relates to compounds of the formula I, where X is hydrogen, halogen or loweralkyl; and R1, R2 and R3 are each independently hydrogen, loweralkyl, cycloalkyl, arylloweralkyl or aryl, or alternatively the group -NR2R3 taken as a whole constitutes R4 being hydrogen or loweralkyl and a process for their preparation. The compounds of the invention show central cholinergic innervative properties for treating various memory dysfunctions and can, therefore, be used as medicaments.