A Catalytic Cross‐Olefination of Diazo Compounds with Sulfoxonium Ylides
作者:James D. Neuhaus、Adriano Bauer、Alexandre Pinto、Nuno Maulide
DOI:10.1002/anie.201809934
日期:2018.12.3
A ruthenium‐catalysed cross‐olefination of diazo compounds and sulfoxonium ylides is presented. Our reaction design exploits the intrinsic difference in reactivity of diazo compounds and sulfoxonium ylides as both carbene precursors and nucleophiles, which results in a highly selective reaction.
Regioselective and stereoselective sulfonylation of alkynylcarbonyl compounds in water
作者:Wenyi Li、Guoxing Yin、Lei Huang、Yan Xiao、Zhimin Fu、Xiu Xin、Fang Liu、Zhizhang Li、Weimin He
DOI:10.1039/c6gc01196a
日期:——
A simple and efficient route for the synthesis of Z-[small beta]-sulfonyl-[small alpha],[small beta]-unsaturated carbonylcompounds by using water as the solvent and hydrogen source is developed.
开发了一种简单有效的途径,以水为溶剂和氢源,合成Z-小β-磺酰基-小α,β-不饱和羰基化合物。
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.
Water‐promoted sulfonylation of propargyl esters leading to highly regioselective and stereoselective formation of (Z)‐β‐sulfonyl enoates in excellent yields, by a simple, mild, rapid and environmentally benign reaction procedure is reported.
A straightforwardsynthesis of 1,2‐dicyanoalkanes by reacting nitroalkenes with trimethylsilyl cyanide in the presence of tetrabutylammoniumfluoride is described. The reaction proceeds through a tandem double Michael addition under mild conditions. Employing the hypervalent silicate generated from trimethylsilyl cyanide and tetrabutylammoniumfluoride is essential for achieving this transformation