一系列吲哚并嗪通过内部炔烃顺利地进行了可见光诱导的分子间[3 + 2]环空拆分,从而以良好的产率和良好的区域选择性提供了吡咯并[2,1,5- cd ]吲哚并嗪。通过该级联反应,方便地合成了具有大π系统的一系列含氟稠合吲哚嗪。在简单条件下使用可见光作为能源,以空气作为化学计量的氧化剂,使该过程具有吸引力和实用性。
Visible-Light-Induced Regioselective Dicarbonylation of Indolizines with Oxoaldehydes via Direct C–H Functionalization
作者:Lili Teng、Xiang Liu、Pengfeng Guo、Yue Yu、Hua Cao
DOI:10.1021/acs.orglett.0c01094
日期:2020.5.15
A metal-free system for regioselective dehydrogenative cross-couplings between indolizines and oxoaldehydes catalyzed by visible light under mild conditions has been described. As an atom economical and eco-friendly protocol, the reaction proceeds in good yields using inexpensive, readily available visible-light sources and the environmentally friendly oxidant oxygen. Various valuable 1,2-dicarbonyl