A Simple Synthetic Method for γ-Methylene-γ-butyrolactones from Diallyl 2-Propynylmalonates by Palladium-Catalyzed Cyclization and Hydrogenolysis with Formic Acid

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Abstract
A simple synthetic method for α-alkyl-γ-methylene-γ-butyrolactones 8 from easily available diallyl alkyl(2-propynyl)malonates 7 by the palladium(0)-catalyzed tandem cyclization and hydrogenolysis with formic acid is reported.