Axial Chirality Control of Gold(biphep) Complexes by Chiral Anions: Application to Asymmetric Catalysis

The axial chirality of tropos gold–biphep (biphep=bis(phosphanyl)biphenyl) complexes, which is controlled by a chiral anion such as (S)-2 (=X*−), is imprinted and memorized even after the dissociation of chiral anion. An enantiopure complex thus obtained efficiently function as an atropos asymmetric catalyst in an intramolecular hydroamination.