Process for preparing heterocyclic cyclic amine derivatives useful in enhancing memory in patients suffering from dementia and alzheimer's disease

摘要

Compounds of formula (I) wherein R1, R2, R7, R8, X, Y, M and L are defined as below. The compounds of formula (I) are cholinesterase inhibitors and are useful in enhancing memory in patients suffering from dementia and Alzheimer's disease.