Highly diastereoselective cyclopropanation of α-methylstyrene catalysed by a C2-symmetrical chiral iron porphyrin complex†
Abstract
A new chiral iron porphyrin-based catalyst performed α-methylstyrene stereoselective cyclopropanation with excellent yields (up to 99%), enantio- and diastereoselectivities (eetrans up to 87%, trans/cis ratios up to 99 : 1) and outstanding TON and TOF values (up to 20 000 and 120 000 h−1 respectively).