双亚氨基膦酸酯的合成应用– 11 H-喹唑啉代[2,3- b ]-和喹唑啉代[4,3- b ]喹唑啉环体系的某些衍生物的制备
摘要:
双(亚氨基正膦)3与两个当量的芳基异氰酸酯的Aza Wittig反应直接提供了双环胍4。然而,3在热处理时发生分子内氮杂Wittig反应,得到衍生自2-(o-叠氮基苯基)-4(3 H)-喹唑啉酮的亚氨基磷烷6。化合物6与异氰酸酯,酰氯和二硫化碳反应,生成喹唑啉代[4,3- b ]喹唑啉衍生物8a–c,9a–c,10和11。
An Efficient One-Pot Multicomponent Synthesis of Tetracyclic Quinazolino[4,3-b]quinazolines by Sequential C–N Bond Formation and Copper-Mediated Aerobic Oxidative Cyclization
作者:Manjula Alla、Gal Potuganti、Divakar Indukuri
DOI:10.1055/s-0036-1591578
日期:2018.8
synthesis of quinazolino[4,3-b]quinazoline derivatives has been accomplished, starting from 2-(2-bromophenyl)quinazolin-4(3H)-one, aldehydes, and various nitrogen sourcesunderaerobicconditions. The multicomponent protocol is mediated by copper(I) salts and involves amination of 2-(2-bromophenyl)quinazolin-4(3H)-one, followed by condensation with the aldehyde and an oxidative cyclization to give the target