Highly Enantioselective Epoxidation of 2,2-Dimethylchromenes

Abstract
A newly synthesized chiral [bis(salicylidene)ethylenediamine]manganese(III) complex 2a was found to catalyze the epoxidation of 2,2-dimethylchromenes 15-17 with high enantioselectivity (86-92% ee).