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。
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
A Diels–Alder approach to biaryls (DAB): synthesis of the western portion of TMC-95
作者:Bradley O. Ashburn、Lauren K. Rathbone、Elizabeth H. Camp、Rich G. Carter
DOI:10.1016/j.tet.2007.10.118
日期:2008.1
The rapid synthesis of the western biaryl portion of TMC-95 is disclosed via the use of a Diels–Alder reaction with o-nitrostyrene derivative and 1-silyloxy diene with excellent regiochemical control. Subsequent sequential substitutions of a p-iodo-phenol derivative followed by an o-bromo-nitrobenzene intermediate are employed to incorporate the western carbonframework of TMC-95.
Copper-Catalyzed Aerobic Decarboxylative Sulfonylation of Cinnamic Acids with Sodium Sulfinates: Stereospecific Synthesis of (<i>E</i>)-Alkenyl Sulfones
A copper-catalyzed aerobic decarboxylative sulfonylation of alkenyl carboxylic acids with sodium sulfinates is developed. This study offers a new and expedient strategy for stereoselective synthesis of (E)-alkenyl sulfones that are widely present in biologically active natural products and therapeutic agents. Moreover, the transformation is proposed to proceed via a radical process and exhibits a broad