Catalytic CN Bond Alkynylation of<i>N</i>-Benzylic Sulfonamides with Terminal Alkynes
作者:Congrong Liu、Fulai Yang、Tingting Wang
DOI:10.1002/cjoc.201400194
日期:2014.5
of N‐benzylic sulfonamides with terminalalkynes for the synthesis of internal alkynes is reported. In the presence of 5 mol% of (Tf)2NH/Bi(OTf)3 (1:1), a broad range of N‐benzylic sulfonamides react smoothly with arylacetylenes to afford structurally diverse internal alkynes in moderate to excellent yields. We reasoned that vinyl cations could be formed by the regioselective attack of terminal alkynes
An unprecedented protocol has been developed for the regioselectivesynthesis of structurally diverse indene derivatives from readily accessible N-benzylic sulfonamides and disubstituted alkynes through FeCl3-catalyzed cleavage of sp3 carbon−nitrogen bonds to generate benzyl cation intermediates. In the presence of 10 mol % of FeCl3, a broad range of N-benzylic sulfonamides smoothly react with internal
A range of arylallenes undergo carbocation-initiated cyclization reaction with N-benzylic and N-allylic sulfonamides in the presence of 10 mol% ferric chloride to give structurally diverse polysubstituted indenes in good yields with extremely high regioselectivity.
FeCl<sub>3</sub>-Mediated Cyclization of [60]Fullerene with <i>N</i>-Benzhydryl Sulfonamides under High-Speed Vibration Milling Conditions
作者:Yi-Tan Su、Guan-Wu Wang
DOI:10.1021/ol4014602
日期:2013.7.5
The FeCl3-mediated reaction of [60]fullerene with N-benzhydryl sulfonamides afforded C60-fused indane derivatives using the high-speed vibration milling technique. A possible reaction mechanism involving the unprecedented FeCl3-mediated homolytic C–N bond cleavage of N-benzhydryl sulfonamides is proposed. The electrochemistry of the obtained C60-fused indanes was also investigated.