Silver-promoted synthesis of vinyl sulfones from vinyl bromides and sulfonyl hydrazides in water
作者:Ge Zhang、Jian-Guo Fu、Qian Zhao、Gui-Shan Zhang、Meng-Yao Li、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1039/d0cc00784f
日期:——
The synthesis of vinylsulfones via silver-promoted cross-coupling of vinyl bromides with sulfonyl hydrazides was realized. Water was used as the sole solvent. Multisubstituted vinylsulfones were easily prepared with excellent alkyl group tolerance. A mechanism involving nucleophilic attack of a sulfinate anion was proposed.
作者:Meng-Yang Chang、Hang-Yi Tai、Chung-Yu Tsai、Yi-Jing Chuang、Ying-Ting Lin
DOI:10.1016/j.tetlet.2014.10.018
日期:2014.11
A facile route toward substituted aryl diarylvinyl ethers 4 is developed from CuI-mediated cross-coupling reaction of substituted phenols 2 with diarylvinyl bromides 3 in the presence of various bidentate-based ligands in DMF. Skeleton 3 is prepared by Yan’s bromomethylenation of diarylketones 1 with CHBr3–TiCl4–Mg in the co-solvent of DME and CH2Cl2. The synthetic route obtains moderate yields from