Electrochemical Alkynyl/Alkenyl Migration for the Radical Difunctionalization of Alkenes
作者:Yongyuan Gao、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1002/chem.201804157
日期:2018.11.22
An efficient electrochemical 1,2‐sulfonylation/alkynylation of alkenes via radical 1,4‐alkynyl migration of alkynyl‐substituted tertiary alcohols is described, which used sodium sulfinates as sulfonyl sources affording the corresponding α‐sulfonyl‐β‐alkynylated products in moderate to excellent yields. This electrochemical reaction proceeds smoothly without the use of any metal catalyst, additive and
α-Perfluoroalkyl-β-alkynylation of alkenes via radical alkynyl migration
作者:Xinjun Tang、Armido Studer
DOI:10.1039/c7sc02175e
日期:——
Transitionmetal-free radical α-perfluoroalkylation with concomitant β-alkynylation of unactivated alkenes is presented. These cascades proceed via electron-catalysis and comprise a radical 1,5- or 1,6-alkynyl migration from tertiary propargylic alcoholates to secondary or tertiary C-radicals as key step. Alkynyl migration leads to a ketyl radical anion that sustains the chain as a single electron