Alkene Difunctionalization Triggered by a Stabilized Allenyl Radical: Concomitant Installation of Two Unsaturated C−C Bonds
作者:Yunlong Wei、Hong Zhang、Xinxin Wu、Chen Zhu
DOI:10.1002/anie.202106145
日期:2021.9.6
Radical-mediated difunctionalization of alkenes provides a promising approach to introduce one alkenyl or alkynyl group to target compounds. However, simultaneous installation of two unsaturated C−C bonds via alkene difunctionalization remains elusive, attributable to the high instability and transient lifetimes of alkenyl and alkynyl radicals. Herein, we report the photocatalytic 1,2-alkynylalkenylation and
烯烃的自由基介导的双官能化提供了一种将一个烯基或炔基引入目标化合物的有前途的方法。然而,由于烯基和炔基自由基的高不稳定性和瞬态寿命,通过烯烃双官能化同时安装两个不饱和的 C-C 键仍然难以捉摸。在此,我们首次报告了烯烃的光催化 1,2-炔基烯基化和 1,2- 烯炔基化,这是由稳定的烯基自由基与烯烃的分子间加成引发的。一系列经过战略设计、易于使用的双功能试剂被应用于自由基对接-迁移级联。该协议具有广泛的底物范围,并有效地增加了不饱和度。