Reddy, D. Bhaskar; Reddy, K. Ramachandra; Padmaja, A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1997, vol. 36, # 7, p. 608 - 611
Iodine-Catalyzed Facile Approach to Sulfones Employing TosMIC as a Sulfonylating Agent
摘要:
A novel iodine-catalyzed functionalization of a variety of olefins and alkynes and direct decarboxylative functionalization of cinnamic and propiolic acids with TosMIC to provide access to various vinyl, allyl, and beta-iodo vinylsulfones is described. This simple, efficient, and environmentally benign approach employing inexpensive molecular iodine as a catalyst demonstrates a versatile protocol for the synthesis of highly valuable sulfones, rendering it attractive to both synthetic and medicinal chemistry.
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。
Metal-free, one-pot highly selective synthesis of (E)-vinyl sulfones and sulfoxides via addition–oxidation of thiols with alkynes
We have developed a highlyselectiveone-pot method for the synthesis of (E)-vinyl sulfones and sulfoxides from thiols with terminal alkynes. The sulfones and sulfoxides could be obtained with excellent selectivity in good isolated yields. It is simple, efficient and environmentally benign, and metal-free. The mechanism for the formation of the (E)-vinyl sulfones was also proposed.
Efficient Synthesis of Vinyl Sulfones by Manganese-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts
作者:Wei Deng、Jiannan Xiang、Na Xue、Ruqing Guo、Xinman Tu、Weiping Luo
DOI:10.1055/s-0035-1562476
日期:——
An efficient synthesis of vinyl sulfones is described. Reactions of cinnamic acids with aromatic sulfinic acid sodium salts in the presence of a catalytic amount of manganese(II) acetate tetrahydrate (5 mol%) in dimethyl sulfoxide (DMSO) afforded the desired vinyl sulfones in good to excellent yields. Notably, the reaction does not need any base or iodide as additive. The use of DMSO as the solvent
描述了乙烯基砜的有效合成。在二甲基亚砜 (DMSO) 中催化量的四水合乙酸锰 (II) (5 mol%) 存在下,肉桂酸与芳族亚磺酸钠盐的反应以良好至极好的收率提供所需的乙烯基砜。值得注意的是,该反应不需要任何碱或碘化物作为添加剂。使用 DMSO 作为溶剂并在空气中进行反应是获得良好收率的关键。
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