Ruthenium(II)‐Catalyzed Chelation‐Assisted Arylation of CH Bonds with Diaryliodonium Salts

Abstract Chelation‐assisted arylation of the ortho CH bonds in 2‐arylpyridine derivatives was achieved by using [Ru(OAc) 2 ( p ‐cymene)] as the catalyst and diaryliodonium salts as the arylation reagent. The reaction can tolerate a broad range of functional groups and, in contrast to other Ru‐catalyzed CH arylation reactions with diaryliodonium salts, appears to proceed by a mechanism similar to Pd‐catalyzed CH arylation.