Palladium complex catalyzed acylation of allylic esters with acylstannanes: complementary method to the acylation with acylsilanes.

Palladium-catalyzed acylation of allylic trifluoroacetates (2) using acylstannanes (1) is reported. The reaction serves as a complementary method to the previously reported acylation with acylsilane (4). In particular, the reaction is profitable in the acylation of unsubstituted allyl trifluoroacetate (2a) and benzoylation of allylic trifluoroacetates to afford synthetically useful beta,gamma-unsaturated ketones (3) in good yields without undesirable isomerizations.