Abstract The methodology in this article is a palladium (II)/copper (II)-or palladium (II)- catalyzed intermolecular cyclization of acrylic acid with alkenes to produce α-methylene-γ- butyrolactone derivatives using molecular oxygen as an environmentally benign oxidant. In this system, the carboxylato, especially trifluoroacetato, or trimethylacetato ligand, plays a quite important role to afford a high catalytic activity by suppressing the deposition of ...
