New methodology for the preparation of quinazoline derivatives via tandem aza-wittig/heterocumulene-mediated annulation. Synthesis of 4(3H)-quinazolinones, benzimidazo[1,2-c] quinazolines, quinazolino[3,2-a]quinazolines and benzothiazolo[3,2-c]quinazolines
作者:Pedro Molina、Mateo Alajarín、Angel Vidal
DOI:10.1016/s0040-4020(01)81321-1
日期:1989.1
2-substituted-4(3H)-quinazolinones . Iminophosphoranes also react with carbon disulfide and carbon dioxide to give the quinazolinones and respectively. Iminophosphorane , derived from 2-(o-azidophenyl)benzimidazole, reacts with isocyanates, carbon disulfide and carbon dioxide to form 6-substituted benzimidazo[1,2-c]quinazolines and respectively. In benzene at room temperature, iminophosphorane , reacts
衍生自N-取代的邻叠氮基苯甲酰胺,2-(邻叠氮基苯基)-苯并咪唑,-苯并噻唑或-3,1-苯并恶嗪-4-酮的亚氨基膦与氮杂枯烯的aza-Wittig反应导致官能化的喹唑啉。亚氨基正膦,衍生自N-取代的邻- azidobenzamides,与异氰酸酯在温和条件下反应,以形成3,1-苯并恶嗪-4-亚胺,其被转换成2-取代的嘧啶-4(3H)-quinazolinones 。亚氨基膦也与二硫化碳和二氧化碳反应,分别得到喹唑啉酮和喹唑啉酮。膦亚胺,由2-(邻-叠氮基苯基)苯并咪唑衍生的,与异氰酸酯,二硫化碳和二氧化碳反应形成6-取代苯并咪唑并[1,2-C]喹唑啉和分别。在室温下的苯中,亚氨基磷烷与异氰酸酯反应生成喹唑啉代[3,2-a]喹唑啉。化合物也可以由亚氨基膦烷和异氰酸酯制备。膦亚胺由2-衍生(邻-叠氮基苯基)苯并噻唑用脂族和芳族异氰酸酯或异硫氰酸酯反应,得到7H-苯并噻唑并[3,2-C]喹唑啉-