Synthesis of Stable N–H Imines with a Benzo[7,8]indolizine Core and Benzo[7,8]indolizino[1,2-<i>c</i>]quinolines via Copper-Catalyzed Annulation of α,β-Unsaturated <i>O</i>-Acyl Ketoximes with Isoquinolinium <i>N</i>-Ylides
作者:Chun-Bao Miao、Xiao-Qi Qiang、Xiaoli Xu、Xiao-Qing Song、Su-Qing Zhou、Xinyu Lyu、Hai-Tao Yang
DOI:10.1021/acs.orglett.2c01386
日期:2022.6.3
A copper-catalyzed annulation of α,β-unsaturated O-acyl ketoximes with isoquinolinium N-ylides has been developed for the concise synthesis of stable N–H imines with a benzo[7,8]indolizine core. When β-(2-bromoaryl)-α,β-unsaturated O-acyl ketoximes are used as the starting materials, a cascade cyclization occurs to afford the benzo[7,8]indolizino[1,2-c]quinolines.
已经开发了一种铜催化的α,β-不饱和O-酰基酮肟与异喹啉N-叶立德的环化反应,用于简明地合成具有苯并 [7,8] 中氮茚核的稳定 N-H 亚胺。当β-(2-溴芳基) -α,β-不饱和O-酰基酮肟作为起始原料时,发生级联环化反应得到苯并[7,8]中氮茚基[1,2- c ]喹啉。