WO3-30% H2O2-Cinchona alkaloids:: a new heterogeneous catalytic system for the asymmetric oxidation of sulfides and the kinetic resolution of racemic sulfoxides

WO3-catalyzed asymmetric oxidation of thioethers and kinetic resolution of sulfoxides with 30% aq. H2O2 in the presence of cinchona alkaloids under heterogeneous conditions affords chiral sulfoxides in high yields with moderate to good enantioselectivities. (C) 2003 Elsevier Science Ltd. All rights reserved.