Electrophilic Activation of S−Si Reagents by Silylium Ions for Their Regio‐ and Diastereoselective Addition Across C−C Multiple Bonds
作者:Honghua Zuo、Elisabeth Irran、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1002/anie.202401599
日期:2024.4.8
An in situ-generated bissilylated sulfonium ion is the actual catalyst in highlyregio- and diastereoselectiveaddition reactions of thiosilanes across the C−C multiple bonds of alkynes and allenes, respectively (see scheme). These thiosilylation reactions enable the direct installation of two orthogonal linchpins for further chemoselective functional-group manipulation.
A new method for the synthesis of anti-Markovnikov Z- or E-vinyl thioethers from thiosilane and terminal alkynes under visible-light-induced photoredox/nickel dual catalysis conditions is described. With a judicious choice of a simple nickel catalyst and a ligand, this strategy enables efficient and divergent access to both Z- or E-vinyl thioethers from the same set of simple starting materials. Notably