Visible Light Photoredox-Catalyzed Arylative Ring Expansion of 1‑(1-Arylvinyl)cyclobutanol Derivatives

A visible light mediated photocatalytic arylation/ring expansion of alkenylcyclobutanols has been developed. This approach provides a mild and operationally simple access to the synthesis of functionalized cyclic ketones from the coupling reaction of alkenylcyclobutanols with aryldiazonium salts