Expeditious formation of γ-lactones upon palladium-catalyzed double nucleophilic addition of bis(TMS)ketene acetals to vicinal allylacetates

Polysubstituted γ-lactones are easily obtained, in one step, upon the interaction of bis(TMS)ketene acetals with vicinal allylic acetates in the presence of catalytic amounts of Pd(PPh3)4.

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