Copper-Catalyzed TBHP-Mediated Radical Cross-Coupling Reaction of Sulfonylhydrazides with Thiols Leading to Thiosulfonates
作者:Guo-Yu Zhang、Shuai-Shuai Lv、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1021/acs.joc.7b01121
日期:2017.9.15
A tert-butyl hydroperoxide (TBHP)-mediated coupling of sulfonylhydrazides with thiols catalyzed by CuBr2 to afford thiosulfonates via a radical process is described.
A green and practical protocol between sulfonyl hydrazides and disulfides is herein reported for the synthesis of unsymmetrical thiosulfonates with the assistance of H2O2 in PEG-400, releasing N2 and H2O as the byproducts. The efficient and compatible process was considered to take place in the absence of metallic catalysts through a radical mechanism as determined by EPR analysis.
磺酰基酰肼和二硫化物之间的绿色和实际协议在本文中报道的不对称硫代磺酸酯与H的援助合成2 Ó 2在PEG-400,释放Ñ 2和H 2 O作为副产物。有效和相容的过程被认为是在不存在金属催化剂的情况下通过EPR分析确定的自由基机理进行的。
Metal-Free Chemoselective Reaction of Sulfoxonium Ylides and Thiosulfonates: Diverse Synthesis of 1,4-Diketones, Aryl Sulfursulfoxonium Ylides, and β-Keto Thiosulfones Derivatives
作者:Fei Wang、Bo-Xi Liu、Weidong Rao、Shun-Yi Wang
DOI:10.1021/acs.orglett.0c02370
日期:2020.8.21
A diverse chemoselective insertion reaction of sulfoxonium ylides and thiosulfonates under transition-metal-free conditions is developed, which successfully affords 1,4-diketone compounds, arylthiosulfoxide-ylides, and β-keto thiosulfones, respectively. The nucleophilic addition of two molecular sulfoxonium ylides to construct sulfone-substituted 1,4-dione compounds is the highlight of this work.
Visible-light-induced dehydrogenative sulfonylation of tertiary amines under transition-metal- and photocatalyst-free conditions
作者:Jinwen Tong、Heng Li、Yan Zhu、Ping Liu、Peipei Sun
DOI:10.1039/d1gc04703e
日期:——
An efficient dehydrogenative sulfonylation of tertiary amines with thiosulfonates enabled by visible-light irradiation is developed. This protocol allows for the construction of a variety of cyclic and acyclic β-sulfonyl enamines under transition-metal-free, external oxidant-free, photocatalyst-free and mild reaction conditions.
Stainless steel-initiated thiosulfonylations of unactivated alkenes under solvent-free conditions in a mixer mill
作者:Deshen Kong、Carsten Bolm
DOI:10.1039/d2gc02519a
日期:——
Thiosulfonates add to unactivated alkenes under solvent-free conditions in a mixermill made of stainless steel. The thiosulfonylation tolerates a wide range of functional groups and leads to high product yields in short reaction times.