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Copper-Catalyzed Intermolecular Oxidative [3+2] Cycloaddition
L. Huang, H. Jiang*, C. Qi, X. Liu
South China University of Technology, Guangzhou, P. R. of China
16 February 2011 (online)
A new synthetic approach to γ-lactones via an intermolecular oxidative [3+2] cycloaddition of alkenes with anhydrides is reported. This copper(II)-catalyzed cyclization uses oxygen as sole oxidant and the anhydride as solvent and proceeds well for a broad range of substrates.