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.
Decatungstate as Direct Hydrogen Atom Transfer Photocatalyst for SOMOphilic Alkynylation
作者:Luca Capaldo、Davide Ravelli
DOI:10.1021/acs.orglett.1c00381
日期:2021.3.19
A versatile approach for the alkynylation of a variety of aliphatic hydrogen donors, including alkanes, is reported. We used tetrabutylammonium decatungstate as photocatalyst to generate organoradicals from C–H/Si–H bondsvia hydrogen atom transfer. The latter intermediates underwent SOMOphilic alkynylation by methanesulfonyl alkynes to afford internal alkynes upon loss of a sulfonyl radical. The effect
The synthesis of ethenyl bifunctional reagents containing a sulfone moiety and zirconium by the abnormal addition of Cp2Zr(H)Cl to internal acetylenic sulfones
作者:Xian Huang、De-Hui Duan
DOI:10.1039/a904620h
日期:——
Ethenyl bifunctional reagents containing a sulfone moiety and zirconium are prepared by the abnormal addition of Cp2Zr(H)Cl to internal acetylenic sulfones.
含有磺酰基和锆的乙烯基双功能试剂是通过Cp2Zr(H)Cl对内烯炔磺酰的异常加成制备的。
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.