A new and efficient chiral catalyst system, lanthanum–chiral BINOL–tris(4-fluorophenyl)phosphine oxide–cumene hydroperoxide, was developed for the epoxidation of α,β-unsaturated ketones thus providing the corresponding epoxy ketones with excellent enantioselectivities (up to >99% ee) in good to excellent yields at room temperature.
开发了一种新型高效的手性催化剂系统:
氟化铈-手性BINOL-三(4-
氟苯基)
磷氧化物-
异佛尔酮过氧化物,用于α,β-不饱和酮的环氧化反应,从而在室温下以良好到优异的产率提供相应的环氧酮,且具有优异的对映选择性(高达>99% ee)。