FUSED HETEROCYCLIC TETRAHYDROAMINOQUINOLINOLS AND RELATED COMPOUNDS,A PROCESS FOR THEIR PREPARATION AND THEIR USE AS MEDICAMENTS

摘要

There are disclosed compounds of the formula where =X-Y- is = @@S-, =N-@@, =CH-N=CH- or = @@O-, R4 being loweralkyl and R5 being hydrogen or loweralkyl, -Z- is - @- or -@@- , n is 1, 2 or 3, R1 and R2 are each independently hydrogen, loweralkyl or arylloweralkyl, and R3 is hydrogen or loweralkyl, with the proviso that when =X-Y-is =N- @@ , n is 2 or 3, R1 is hydrogen and R2 is hydrogen or loweralkyl, Z is not - @-, which compounds are useful for enhancing memory and for treating Alzheimer's disease.