Unified Approach to Substituted Allenoates via Pd-Catalyzed β-Hydride Elimination of (E)-Enol Triflates

A robust synthesis of allenoates via a Pd-catalyzed β-hydride elimination of (E)-enol triflates is presented. Salient features of this method include low catalyst loadings, mild reaction conditions, and the ability to access all four patterns of substituted allenoates from a single substrate class.