Radical Carbonylation Mediated by Continuous-Flow Visible-Light Photocatalysis: Access to 2,3-Dihydrobenzofurans
作者:Nenad Micic、Anastasios Polyzos
DOI:10.1021/acs.orglett.8b01971
日期:2018.8.3
The annulative carbonylation of alkenyl-tethered arenediazonium salts using visible-light photocatalysis in continuous flow is described. The method furnishes a diverse series of novel acetate-functionalized 2,3-dihydrobenzofurans at room temperature and moderate CO pressure (25 atm), delivering these products in a short time with straightforward scale-up. This continuous flow and free-radical approach
描述了在连续流中使用可见光光催化的链烯基系杂二氮杂鎓盐的环状羰基化。该方法在室温和适度的CO压力(25个大气压)下提供了一系列新的乙酸酯官能化的2,3-二氢苯并呋喃,可在短时间内以直接放大的方式提供这些产品。这种连续流动和自由基方法克服了传统的Pd催化环式羰基化的局限性,从而以可预测和区域选择性的方式提供了有价值的2,3-二氢苯并呋喃。