Chiral recognition during the reaction of dienyliron complexes with sulphoximine-stabilized enolates

Abstract

The first example is reported of chiral recognition during enolate nucleophile addition to dienyliron complexes; enantiomeric excesses of up to 50% were obtained by reaction of complex (1) with enolates derived from the sulphoximinyl ester derivatives (8) and a remarkable effect of the enolate countercation was observed, suggesting that nonco-ordinated enolate gives maximum enantioselectivity.