Asymmetric organocatalysis of epoxidation by iminium salts under non-aqueous conditions
作者:Philip C. Bulman Page、Benjamin R. Buckley、David Barros、A. John Blacker、Brian A. Marples、Mark R.J. Elsegood
DOI:10.1016/j.tet.2007.04.066
日期:2007.6
Three iminium salts have been tested as catalysts for the asymmetric epoxidation of simple alkenes under non-aqueous conditions in various solvents, at varying temperatures, employing tetraphenylphosphonium monoperoxybisulfate (TPPP) as the stoichiometric oxidant. Enantiomeric excesses of up to 89% have been observed.