One-pot (beta)-substitution of enones with alkyl groups to (beta)-alkyl enones

Vinylic hydrogens at the (beta)-position of enones were effectively substituted with alkyl groups in a one-pot procedure to afford (beta) -alkyl enones in good to high isolated yields by conjugate addition of higher-order dialkyl cyanocuprates to enones, followed by a reaction with N-tert-butylbenzenesulfinimidoyl chloride at –78 °C.