Palladium-Catalyzed Ring-Opening Coupling of Cyclobutenols with Aryl Halides

A palladium(0)-catalyzed ring-opening cross-coupling reaction between tert-cyclobutenols and aryl halides produces gamma-arylated beta,gamma-unsaturated ketones. In the case of aryl halides bearing functional groups at the ortho position, the resulting ring-opened ketones undergo intramolecular condensation to afford bicyclic aromatic compounds.