Electrosynthesis of vinyl sulfones from alkenes and sulfonyl hydrazides mediated by KI: Аn electrochemical mechanistic study
作者:Alexander O. Terent'ev、Olga M. Mulina、Dmitry A. Pirgach、Alexey I. Ilovaisky、Mikhail A. Syroeshkin、Nadezhda I. Kapustina、Gennady I. Nikishin
DOI:10.1016/j.tet.2017.10.047
日期:2017.12
sulfones were prepared from alkenes and sulfonyl hydrazides via electrochemical oxidative sulfonylation. The reaction proceeds in an experimentally convenient undivided electrochemical cell equipped with graphite and iron electrodes employing KI as a redox catalyst and a supporting electrolyte. Applying extremely high current density up to 270 mA/cm2 permits rapid synthesis in a compact reactor and
由烯烃和磺酰肼通过电化学氧化磺酰化反应制备了各种乙烯基砜。该反应在配备了石墨和铁电极且使用KI作为氧化还原催化剂和支持电解质的实验方便的未分隔电化学电池中进行。施加高达270 mA / cm 2的极高电流密度,可以在紧凑的反应器中以小表面积电极快速合成。利用循环伏安法提出了一种可能的反应机理。在该反应中阳极和阴极过程的结合使得可以在温和的条件下以中等至高的产率获得产物。
Iodine-mediated synthesis of (E)-vinyl sulfones from sodium sulfinates and cinnamic acids in aqueous medium
作者:Jian Gao、Junyi Lai、Gaoqing Yuan
DOI:10.1039/c5ra10896a
日期:——
With water as the reaction medium, a green and efficient method has been developed for the synthesis of (E)-vinylsulfones via I2-mediated decarboxylative cross-coupling reactions of sodium sulfinates with cinnamic acids. This synthetic route could effectively avoid the use of toxic organic solvents and transition metal catalysts, and the target products could be obtained with moderate to excellent
Radical Heck-type reaction of styrenes with sulfonyl hydrazides on water at room temperature
作者:Wen-Hui Bao、Wei-Wei Ying、Xu-Dong Xu、Guo-Dong Zhou、Xiao-Xiao Meng、Wen-Ting Wei、Yan-Yun Liu、Qiang Li
DOI:10.1016/j.tetlet.2018.11.059
日期:2019.1
vinyl sulfones is developed. The reaction is performed under economical TBAI/TBHP system on water in open air at room temperature, which proceeds through the radical addition to styrenes followed by hydrogen-abstraction. When compared to known approaches for the synthesis of vinyl sulfones from alkenes, this radical Heck-type strategy is practical, green and does not go through HI elimination process
Copper-Catalyzed Heck-Type Couplings of Sulfonyl Chlorides with Olefins: Efficient and Rapid Access to Vinyl Sulfones
作者:Lixia Liu、Pan Xue、Qiulin Chen、Chengming Wang
DOI:10.1016/j.tetlet.2021.153319
日期:2021.9
A copper-catalyzed redox-neutral alkene sulfonylation reaction has been developed. This reported protocol can be easily scale up to a gram scale, and smoothly applied to the late-stage modification of several bioactive molecules.