A series of novel 4-amino or 4-hydrazino-2-(substituted piperazinyl)-6,7-dimethoxyquinazolines is disclosed having antihypertensive and phosphodiesterase inhibiting properties. Piperazinyl substituents include cycloalkenylcarbonyl, cycloalkylcarbonyl, and methylcycloalkylcarbonyl. A representative embodiment of the invention is 4-amino-2-[4-(cyclopentylcarbonyl)-1-piperazinyl]-6,7-dimethoxyquinazoline .
一系列新颖的4-
氨基或4-联
氨基-2-(取代
哌嗪基)-
6,7-二甲氧基喹唑啉类化合物被披露,具有降压和
磷酸二酯酶抑制特性。
哌嗪基取代物包括环烯基羰基、环烷基羰基和甲基环烷基羰基。该发明的代表性实施例是4-
氨基-2-[4-(环戊基羰基)-1-
哌嗪基]-
6,7-二甲氧基喹唑啉。