Stereoselective Z-halosulfonylation of terminal alkynes using sulfonohydrazides and CuX (X = Cl, Br, I)
作者:Jie-Ping Wan、Deqing Hu、Feicheng Bai、Li Wei、Yunyun Liu
DOI:10.1039/c6ra13737g
日期:——
The unconventional Z-selective halosulfonylation of terminal alkynes has been achieved by using CuX (X = Cl, Br, I)/sulfonohydrazides at rt, providing a practical and new route for the synthesis of diverse halogenated vinyl sulfones.
Hydrogen bonding network assisted regio- and stereo- controlled hydrohalogenations of sulfonyl alkynes
作者:Bocheng Chen、Xiaowen Xia、Xiaojun Zeng、Bo Xu
DOI:10.1016/j.tetlet.2018.09.051
日期:2018.10
We have developed an efficient synthesis of β-halo Z-sulfonyl alkenes via hydrohalogenations of readily available sulfonyl alkynes. The high hydrogen bonding acidity of linear acetic acid network or aggregate may play a vital role in activation of sulfonyl alkyne substrates. Our condition offers high stereoselectivity, good chemical yields, and high functional group tolerance.
Generation of β-Halo Vinylsulfones through a Multicomponent Reaction with Insertion of Sulfur Dioxide
作者:Yuanchao Xiang、Yunyan Kuang、Jie Wu
DOI:10.1002/chem.201701465
日期:2017.5.23
A four-component reaction of terminal alkynes, aryldiazonium tetrafluoroborates, sulfur dioxide surrogate of DABCO·(SO2)2, and potassium halide in the presence of copper(I) chloride (10 mol %) gives rise to β-halo vinylsulfones with good stereoselectivity. The vicinal difunctionalization of alkynes through sulfonylation and halogenation with the insertion of sulfur dioxide works efficiently. A plausible
NAIDU, M. S. R.;PRABHAKARA, R., INDIAN J. CHEM., 1984, 23, N 2, 140-145
作者:NAIDU, M. S. R.、PRABHAKARA, R.
DOI:——
日期:——
Studies on Hydrozirconation of 1-Alkynyl Sulfoxides or Sulfones and the Application for the Synthesis of Stereodefined Vinyl Sulfoxides or Sulfones
作者:Xian Huang、Dehui Duan、Weixin Zheng
DOI:10.1021/jo0111154
日期:2003.3.1
Z-beta-sulfonyl alpha,beta-unsaturated ketones, and Z-beta-alkynyl vinyl sulfones. Although the reaction mechanisms are still not clear, the neighboringgroupparticipation of the sulfinyl or sulfonyl group may be playing an important role in this unique hydrozirconation reaction.