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
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.