A series of novel 4-amino-2-(thiadiazole-carbonyl piperazinyl)-6,7-dimethoxyquinazolines is disclosed having antihypertensive properties. The thiadiazole substituent may be optionally substituted with alkyl or lower alkoxy carbonylamino groups. A representative embodiment of the invention is 4-amino-6,7-dimethoxy-2-[4-(5-ethoxy-carbonylamino-1,2,3-thiadiazole-4-car bonyl)-piperazin-1-yl]-quinazoline.
披露了一系列具有降压作用的新型4-
氨基-2-(
噻二唑-羰基
哌嗪基)-
6,7-二甲氧基喹唑啉化合物。
噻二唑取代基可以选择性地被烷基或较低的烷氧羰胺基所取代。该发明的代表性实施形式是4-
氨基-6,7-二甲氧基-2-[4-(5-乙氧基羰胺基-1,2,3-
噻二唑-4-羰基)-
哌嗪-1-基]-
喹唑啉。