Electrosynthesis of (<i>E</i>)-Vinyl Sulfones Directly from Cinnamic Acids and Sodium Sulfinates via Decarboxylative Sulfono Functionalization
作者:Peng Qian、Meixiang Bi、Jihu Su、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.joc.6b00661
日期:2016.6.3
A variety of (E)-vinyl sulfones were constructed directly from cinnamic acids and sodium sulfinates with high regioselectivity at room temperature by virtue of an electrocatalytic oxidation. A radical intermediate was detected, and the corresponding mechanism was investigated.
The synthesis of vinyl sulfone derivatives via the reaction of arylpropiolic acids, K2S2O5, and aryl boronic acids is reported. The CuBr2/1,10-phenanthroline catalytic system in the presence of acetic acid provides the desired vinyl sulfones in moderate to good yield. Furthermore, the methodology features excellent functional group tolerance.
报道了通过芳基丙炔酸、K 2 S 2 O 5和芳基硼酸的反应合成乙烯基砜衍生物。在乙酸存在下的 CuBr 2 /1,10-菲咯啉催化体系以中等至良好的产率提供所需的乙烯基砜。此外,该方法具有出色的官能团耐受性。
Heck Vinylations Using Vinyl Sulfide, Vinyl Sulfoxide, Vinyl Sulfone, or Vinyl Sulfonate Derivatives and Aryl Bromides Catalyzed by a Palladium Complex Derived from a Tetraphosphine
affords an efficient catalyst for the Heck reaction ofsulfur-containing alkenes with aryl bromides. The rates and yields of the reactions strongly depend on the oxidation state of the sulfur atom. Using vinyl sulfides with 1 mol% catalyst, low to moderate yields of arylated alkenes were obtained. Phenyl vinyl sulfoxide was found to be more reactive, and satisfactory yields of (E)-[2-(phenylsulfinyl)vinyl]benzene
An efficient and straightforward route to terminal vinyl sulfones via palladium-catalyzed Suzuki reactions of α-bromo ethenylsulfones
作者:Yewen Fang、Meijuan Yuan、Juncong Zhang、Li Zhang、Xiaoping Jin、Ruifeng Li、Jinjian Li
DOI:10.1016/j.tetlet.2016.02.065
日期:2016.3
A general and simple protocol for the synthesis of α-substituted alkenylsulfones has been developed firstly via palladium-catalyzed Suzuki reactions between α-bromo ethenylsulfones and organoborons. Using a catalyst composed of Pd(OAc)2 and SPhos, a variety of aryl, heteroaryl, and alkylboron reagents could efficiently couple with α-bromo ethenylsulfones under mild conditions. Moreover, it has been
Copper-catalyzed highly selective direct hydrosulfonylation of alkynes with arylsulfinic acids leading to vinyl sulfones
作者:Wei Wei、Jinli Li、Daoshan Yang、Jiangwei Wen、Yueting Jiao、Jinmao You、Hua Wang
DOI:10.1039/c3ob42522c
日期:——
Copper-catalyzed direct hydrosulfonylation of alkynes with arylsulfinic acids for the synthesis of (E)-vinyl sulfones has been developed with 100% atom efficiency.