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. (c) 2007 Elsevier Ltd. All rights reserved.
- ENANTIOSELECTIVE OLEFIN EPOXIDATION
- UNSATURATED OXAZIRIDINES
- CHIRAL OXAZIRIDINIUM SALT
- INTRAMOLECULAR EPOXIDATION