Visible‐Light‐Induced Radical Cascade Cyclizations of 1,7‐Enynes with Sulfinic Acids: Direct Access to Sulfonated Chromanes and Sulfonated Tetrahydroquinolines under Metal‐Free Conditions
作者:Qi Liu、Yousheng Mei、Lei Wang、Yongmin Ma、Pinhua Li
DOI:10.1002/adsc.202000846
日期:2020.12.22
Visible‐light‐induced strategy to access sulfonated chromanes and sulfonated 1,2,3,4‐tetrahydroquinolines via a radical cascade cyclization of 1‐(arylethynyl)‐2‐(vinyloxy)benzenes and N‐allyl‐2‐(arylethynyl)anilines with aromatic and aliphatic sulfinic acids has been developed. In the presence of TBHP (7.5 mol%) as an oxidant and Eosin Y (3.0 mol%) as a photocatalyst, the reactions undergo smoothly