A practical transition-metal-free procedure for the synthesis of (E)-vinylsulfones through the coupling of vinylhalides with sodium sulfinates in water is reported. The reaction is strongly influenced by the presence of acids, and the use of nBu4NBr promotes its efficiency.
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。
<i>E</i>-Selective synthesis of vinyl sulfones <i>via</i> silver-catalyzed sulfonylation of styrenes
作者:Qingwen Gui、Kang Han、Zhuoliang Liu、Zhaohong Su、Xiaoli He、Hongmei Jiang、Bufan Tian、Yangyan Li
DOI:10.1039/c8ob01502c
日期:——
An efficient and highly E-selective protocol for the synthesis of vinyl sulfones is described. This simple protocol demonstrates the first synthesis of vinyl sulfonesvia a silver-catalyzed C–S bond coupling reaction. In addition, the success of the reaction was found to be critically dependent on the use of TEMPO as the additive.
Synthesis of Vinylsulfones Via Palladium-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts
作者:Ruqing Guo、Qingwen Gui、Dadian Wang、Ze Tan
DOI:10.1007/s10562-014-1286-5
日期:2014.8
A highly efficient synthesis of vinylsulfones was achieved via decarboxylative cross-coupling reaction of cinnamic acids with aromaticsulfinic acid sodium salts catalyzed by Pd(OAc)2 and dppb in the presence of Ag2CO3. The reaction was found to furnish various vinylsulfones in good yields instead of the expected desulfitative product stilbenes. Mechanistic investigation also suggested that the decarboxylation
Metal-free Oxidative Coupling of Aromatic Alkenes with Thiols Leading to (<i>E</i>)-Vinyl Sulfones
作者:Leilei Wang、Huilan Yue、Daoshan Yang、Huanhuan Cui、Minghui Zhu、Jinming Wang、Wei Wei、Hua Wang
DOI:10.1021/acs.joc.7b00994
日期:2017.7.7
A facile I2O5-mediated direct oxidative coupling of aromatic alkenes with thiols toward vinyl sulfones has been developed under metal-free conditions. This methodology provides a convenient and efficient approach to various (E)-vinyl sulfones from readily available starting materials with excellent regioselectivity. The present oxidative coupling reaction, not only expands the scope of functionalization
在无金属条件下,已经开发出一种简便的由I 2 O 5介导的芳香族烯烃与硫醇向乙烯基砜的直接氧化偶合的方法。该方法学提供了一种简便有效的方法,可从易于获得的起始材料中以优异的区域选择性来制备各种(E)-乙烯基砜。目前的氧化偶合反应不仅扩大了烯烃与硫醇的官能化范围,而且使其成为对(E)-乙烯基砜的传统合成方法的实用而有力的补充。