Asymmetric conjugate addition of copper reagents to alpha,beta-unsaturated tert-butanesulfinyl imines.

[reaction: see text] Addition of organocuprates to N-sulfinyl alpha,beta-unsaturated imines proceeds in good yields and with good diastereoselectivities. alpha,beta-Unsaturated sulfinyl ketimines and aldimines have both been shown to be suitable substrates for this reaction.