Ru(II)‐Catalyzed Ortho C−H Arylation of Heterocyclic Biaryls

Abstract Ru(II)‐Pheox complexes are known catalysts for carbene insertion reactions. Herein we teach them a new trick: how to perform ortho C−H arylation processes! Our operationally simple protocol tolerates structurally diverse directing groups and both aryl iodides and diaryliodonium salts as transfer groups.