A new method for the preparation of alkyl aryl sulfides through direct oxidative thiolation of alkanes or ethers with arylsulfonylhydrazides using di-tert-butyl peroxide (DTBP) as an oxidant catalyzed by Pd(OAc)2 has been reported. The C-H bonds in various alkanes or ethers were successfully converted into C-S bonds to yield the corresponding sulfides in moderate to good yields.
Metal-Free Oxidative C(sp<sup>3</sup>)–H Bond Thiolation of Ethers with Disulfides
作者:Sheng-rong Guo、Yan-qin Yuan、Jian-nan Xiang
DOI:10.1021/ol402281f
日期:2013.9.20
A novel method for the preparation of alkyl aryl sulfides through direct oxidationthiolation of commercial ethers with diaryl disulfides using di-tert-butyl peroxide (DTBP) as the oxidant without a metal catalyst was established. The C(sp3)–Hbond in various ethers was successfully converted into a C–S bond, and the corresponding sulfides were achieved with moderate to high yields.
Site-selective C(sp3)–H thiolation using thiosulfonates has been achieved using the decatungstate anion as a photocatalyst. Using the protocol, a variety of thiolated compounds were synthesized in good yields. The transformation consists of a cascade of double SH2 reactions, HAT and ArS group transfer, and PCET (proton-coupled electron transfer) of the leaving arylsulfonyl radical to arylsulfinic acid
使用十钨酸盐阴离子作为光催化剂,实现了使用硫代磺酸盐的位点选择性 C(sp 3 )–H 硫醇化。使用该方案,以良好的产率合成了多种硫醇化化合物。该转化由一系列双 S H 2 反应、HAT 和 ArS 基团转移以及离开芳基磺酰基到芳基亚磺酸的 PCET(质子耦合电子转移)组成,从而使催化剂 W 10 O 32 4−成为恢复了。
Palladium-catalyzed direct thiolation of ethers with sodium sulfinates
A new method for palladium-catalyzed arylthiolation of ethers with sodium sulfinates is described. The C-H bond in various ethers was successfully converted into C-S bond to yield the corresponding sulfides in moderate to good yields. (C) 2014 Elsevier Ltd. All rights reserved.