| 摘要 |
Novel compounds selected from the group consisting of the formula <IMAGE> I wherein R1 is selected from the group consisting of 1,2,4-oxadiazol-5-yl and 1,3,4-thiadiazol-2-yl, both optionally substituted with alkyl of 1 to 3 carbon atoms or alkenyl of 2 to 5 carbon atoms and 1,2,4-oxadiazol-3-yl and 1,3,4-oxadiazol-2-yl, both optionally substituted with alkenyl of 2 to 5 carbon atoms, alkyl of 1 to 3 carbon atoms or alkyl of 1 to 3 carbon atoms substituted with at least one fluorine, R2 and R3 are individually selected from the group consisting of hydrogen, alkyl of 1 to 3 carbon atoms and alkenyl of 2 to 5 carbon atoms or together form alkylene of 3 to 5 carbon atoms, X is selected from the group consisting of -O- and -S-, R4 is alkyl of 1 to 3 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having anxiolytic sedative and hypnotic activity and a novel process and novel intermediates therefor. |
