Photoredox-Catalyzed and Copper(II) Salt-Assisted Radical Addition/Hydroxylation Reaction of Alkenes, Sulfur Ylides, and Water
作者:Dong-Mei Yan、Shuang-Hua Xu、Hao Qian、Pan-Pan Gao、Ming-Hang Bi、Wen-Jing Xiao、Jia-Rong Chen
DOI:10.1021/acscatal.2c00638
日期:2022.3.18
visible light-driven photoredox-catalyzed and copper(II)-assisted three-component radical addition/hydroxylation reaction of alkenes, sulfur ylides, and water is reported. This process shows broad substrate scope and high functional group tolerance, with respect to both readily available sulfur ylides and alkenes, providing high-yielding and practical access to valuable γ-hydroxy carbonyl compounds.
报道了一种可见光驱动的光氧化还原催化和铜 (II) 辅助的烯烃、硫叶立德和水的三组分自由基加成/羟基化反应。该工艺对容易获得的硫叶立德和烯烃显示出广泛的底物范围和高官能团耐受性,为有价值的 γ-羟基羰基化合物提供了高产和实用的途径。该反应成功的关键是通过可见光驱动的质子耦合电子转移 (PCET) 策略在 2,2,2-三氟乙醇的混合物中通过锍盐控制硫叶立德生成 α-羰基碳自由基/CH 2 Cl 2。添加Cu(TFA) 2 ·H 2O 有助于加速自由基-阳离子交叉以提高反应效率。机理研究表明,产品中的羟基部分来源于水。该研究还为进一步研究硫叶立德的自由基合成化学搭建了一个平台。