One-pot three-component selective synthesis of isoindolo[2,1-a]quinazoline derivatives via a palladium-catalyzed cascade cyclocondensation/cyclocarbonylation sequence
作者:Shenghai Guo、Jianhui Zhai、Fang Wang、Xuesen Fan
DOI:10.1039/c7ob00256d
日期:——
A practical and highly efficient procedure for the selective preparation of 6,6a-dihydroisoindolo[2,1-a]quinazoline-5,11-diones through a palladium-catalyzed one-pot three-component cascade reaction of 2-aminobenzamides with 2-bromobenzaldehydes and carbon monoxide under atmospheric pressure has been developed. This cascade reaction, in which four new C–C/C–N bonds and two new rings are simultaneously
通过钯催化的2-氨基苯甲酰胺与2-的一锅三组分级联反应,选择性地制备6,6a-二氢异吲哚并[2,1- a ]喹唑啉-5,11-二酮的实用高效方法已经开发出在大气压力下的溴苯甲醛和一氧化碳。这种级联反应是同时构筑四个新的C–C / C–N键和两个新的环,是由2-氨基苯甲酰胺与2-溴苯甲醛的环缩合引发的,然后是Pd催化的原位形成的环羰基化反应2,3-二氢喹唑啉-4(1 H)-含CO(1 atm)的化合物。与现有方法相比,本方案具有容易获得的起始原料,广泛的底物范围,产品的结构多样性以及无需高压设备的优点。