| abstract |
Genera1 formula ( I ) : (wherein R1 is hydrogen, hydroxyl, lower alkoxy or halogen; R2 is alkyl having 2 to carbon atoms; R3 is hydrogen, alkyl having 2 to 5 carbon atoms, alkylcarbonyl having 2 to 5 carbon atoms, aryl having 6 to 10 carbon atoms or arylalkyl having 7 to 11 carbon atoms; A ring is bicyclic compound which consists of at least one benzene ring and may contain a saturated or unsaturated five- or six-membered ring which may or may not have heteroatoms, providing that when A ring is indole or 1, 3-benzodioxole, R2 and R3 do not constitute, at the same time, two carbon atoms members, and when R3 is hydrogen. A ring is other bicyclic compound than indole and benzo[b]thiophene and R2 is allyl having 3 to 5 carbon atoms) and pharmaceutically acceptable acid addition salts thereof. These compounds are promising as psychotropic drugs, antidepressants, drugs for Parkinson's disease and/or drugs for Alzheimer' s disease. |