carbene catalyst for carbene transfer reactions of donor–acceptor diazo compounds. Its
broad catalytic capability is demonstrated by a range of metal carbene reactions, from
cyclopropanation, cyclopropenation, epoxidation, and Doyle–Kirmse reaction to O–H
insertion, N–H insertion, and C–H insertion reactions. The asymmetric cyclopropanation of
styrene and methyl phenyldiazoacetate was successfully achieved by the new chiral bis …