Novel compounds selected from the group consisting of the formula ##STR1## wherein R.sub.1 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, R.sub.2 and R.sub.3 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--, R.sub.4 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.
从以下组中选择的新化合物,其
化学式为##
STR1##其中R.sub.1选自1,
2,4-
噁唑啉-5-基和1,3,4-
噻二唑-2-基,两者均可用1至3个
碳原子的烷基或2至5个
碳原子的
烯基取代,以及1,
2,4-
噁唑啉-3-基和1,3,4-
噁唑啉-2-基,两者均可用2至5个
碳原子的
烯基,1至3个
碳原子的烷基或至少一个
氟取代的1至3个
碳原子的烷基取代,R.sub.2和R.sub.3分别选自
氢、1至3个
碳原子的烷基和2至5个
碳原子的
烯基,或者一起形成3至5个
碳原子的烷基,X选自--O--和--S--,R.sub.4为1至3个
碳原子的烷基,以及其无毒、药学上可接受的酸盐,具有抗焦虑、镇静和催眠活性,以及用于其制备的新工艺和新
中间体。