Tandem CÀC bond formation through consecutive nucleophilic addition to construct organic compounds is one of the most attractive strategies in organic synthesis.[1] The classical route, as exemplified by the reaction shown in Scheme1 (top), provides an efficient approach to introduce both α, β substituents at the enone or at an α, β-unsaturated ester. The key intermediate (enolate A) acts as the new nucleophile in the last step.[2] Herein we ...