申请人:Pfizer Inc.
公开号:US03935213A1
公开(公告)日:1976-01-27
6,7-Dimethoxy-4-amino-2-(4-substituted piperazin-1-yl)-quinazolines and 6,7,8-trimethoxy-4-amino-2-(4-substituted piperazin-1-yl)quinazolines are produced by either: (1) reaction of the appropriate 4,5-dimethoxy substituted or 3,4,5-trimethoxy substituted 2-aminobenzonitrile with certain 1,4-disubstituted piperazines; or (2) reaction of the appropriate 4,5-dimethoxy substituted or 3,4,5-trimethoxy substituted 2-aminobenzamidine with the same 1,4-disubstituted piperazines. The products are known hypotensive agents.
6,7-二甲氧基-4-氨基-2-(4-取代哌嗪-1-基)-喹唑啉和6,7,8-三甲氧基-4-氨基-2-(4-取代哌嗪-1-基)喹唑啉可以通过以下两种方法制备:(1)将适当的4,5-二甲氧基或3,4,5-三甲氧基取代的2-氨基苯甲腈与某些1,4-二取代哌嗪反应;或(2)将适当的4,5-二甲氧基或3,4,5-三甲氧基取代的2-氨基苯甲酰胺与相同的1,4-二取代哌嗪反应。这些产物是已知的降压剂。