Redox-Neutral Arylations of Vinyl Cation Intermediates
作者:Daniel Kaiser、Luis F. Veiros、Nuno Maulide
DOI:10.1002/adsc.201600860
日期:2017.1.4
present a new unified concept for C−C bond formation under redox‐neutral conditions. Our strategy hinges upon interception of a vinyl cation with a sulfoxide resulting in simultaneous C–C and C−O bond formation and arylation. A range of structurally diverse vinyl cations are generated in situ in the presence of a sulfoxide, resulting in hydrative arylation, direct arylation of enol triflates and interrupted
Gold(I)-Catalyzed Intermolecular Oxyarylation of Alkynes: Unexpected Regiochemistry in the Alkylation of Arenes
作者:Ana B. Cuenca、Sergi Montserrat、Kabir M. Hossain、Gisela Mancha、Agustí Lledós、Mercedes Medio-Simón、Gregori Ujaque、Gregorio Asensio
DOI:10.1021/ol9020578
日期:2009.11.5
The reaction between acetylenes and sulfoxides, studied as a test case for gold-catalyzed intermolecular addition, provides the oxyarylation compounds 3 in good yields. Unpredictably, in all cases a single regioisomer arising from the electrophilic aromatic alkylation at the position adjacent to the sulfur atom is obtained instead of the expected Friedel-Crafts regioisomer. A new concerted mechanism based on DFT calculations is proposed to account for the products in this intermolecular gold(I)-catalyzed reaction.
4,5-SUBSTITUTED IMIDAZOLYL COMPOUNDS FOR THE TREATMENT OF INFLAMMATION