Asymmetric epoxidation of cis-alkenes with arabinose-derived ketones: enantioselective synthesis of the side chain of Taxol
The ee values of asymmetric epoxidation of cis-ethyl cinnamate 15 with arabinose-derived ketones as catalyst and Oxone as the terminal oxidant were found to increase inversely with the size of the catalyst acetal blocking group. Ketone catalyst