Gold(i)-catalysed synthesis of cyclic sulfamidates by intramolecular allene hydroamination
作者:Mari C. M. Higginbotham、Magnus W. P. Bebbington
DOI:10.1039/c2cc33711h
日期:——
Six-membered cyclic sulfamidates are prepared in high yields by treatment of allenic sulfamates with readily available gold(I) complexes. The reaction enables formation of N-substituted quaternary centres and complements existing processes for sulfamidate formation.
Gold(I)-catalysed synthesis of cyclic sulfamidates: current scope, stereochemistry and competing ene-allene cycloisomerisation
作者:Mari C.M. Higginbotham、Lorna Kennedy、Anita G. Lindsay、Andreas Troester、Magnus W.P. Bebbington
DOI:10.1016/j.tet.2014.11.058
日期:2015.1
Six-membered cyclic sulfamidates are prepared in high yields by treatment of allenic sulfamates with readily available Ph3PAuNTf2. The reaction enables formation of N-substituted quaternary centres in high yields. The relative stereochemistry has been unambiguously determined. A π-rearrangement is faster than hydroamination in the case of an allyl-substituted sulfamate and a mechanism is proposed for