Fig. 1: Regioselective alkylation of unsymmetrical ketones.

a Conventional alkylation of ketones and composition of enolate mixtures generated by various bases. LDA lithium diisopropylamide, KHMDS potassium bis(trimethylsilyl)amide. b Proposed strategy for selective alkylation reaction at the more-hindered α-site. L ligand. c Scope of this allylic alkylation reaction.