One‐Step Synthesis of Substituted Benzofurans from ortho‐ Alkenylphenols via Palladium‐Catalyzed CH Functionalization

Abstract A dehydrogenative oxygenation of C( sp 2 )H bonds with intramolecular phenolic hydroxy groups has been developed, which provides a straightforward and concise access to structurally diversely benzofurans from ortho ‐alkenylphenols. The reaction is catalyzed by palladium on carbon (Pd/C) without any oxidants and sacrificing hydrogen acceptors. magnified image