Abstract
A new one-pot approach to construct α-carbonyl bicyclic furans from easily accessible diynones is described. This reaction sequence proceeds via a Diels-Alder cycloaddition reaction catalyzed by dimethylaluminum chloride followed by a 5-exo-dig cyclization/oxidation reaction catalyzed by copper(II) chloride. This methodology generates α-carbonyl-functionalized dihydroisobenzofuran derivatives in good to excellent yields.
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