Transition metal-free formal hydro/deuteromethylthiolation of unactivated alkenes
作者:Shuangyang Chen、Jia Wang、Lan-Gui Xie
DOI:10.1039/d1ob00413a
日期:——
methylthiotransfer process in organisms, and therefore its functionality is of paramount importance to living organisms. Several methods for the installation of the methylthio group in small molecules have been reported previously; however, procedures starting from unactivated alkenes are rare. Herein, we report a formal hydro/deuteromethylthiolation of alkenes by using dimethyl(methylthio)sulfonium trifluoromethanesulfonate
The Lithium Diisopropylamide-induced Fragmentation of 1,3-Dithiolane Derivatives of Several Ketones Having α-Hydrogen
作者:Hideyuki Ikehira、Shigeo Tanimoto、Tatsuo Oida
DOI:10.1246/bcsj.56.2537
日期:1983.8
The reaction of 1,3-dithiolane derivatives of ketones having α-hydrogen with lithium diisopropylamide results in fragmentation to the corresponding thioketone followed by further conversion in a few steps to the other intermediate species which, on trapping with alkyl halide, leads to a vinylic sulfide and/or a sulfide bearing a secondary alkyl group.
Ex Situ Formation of Methanethiol: Application in the Gold(I)‐Promoted Anti‐Markovnikov Hydrothiolation of Olefins
作者:Steffan K. Kristensen、Simon L. R. Laursen、Esben Taarning、Troels Skrydstrup
DOI:10.1002/anie.201809051
日期:2018.10.15
A protocol for the Au‐promoted anti‐Markovnikovhydrothiolation of olefins using ex situ generated methanethiol is reported. The use of S‐methylisothiourea hemisulfate salt as a solid precursor for methanethiol generation ensures a safe and reliable deliverance of a stoichiometric amount of this thiol. The procedure was shown to work for a broad range of olefins providing the corresponding hydrothiolated