Palladium‐Catalyzed Regioselective Mono‐ and Diarylation Reactions of 2‐Phenylphenols and Naphthols with Aryl Halides

Not only monoarylation but also diarylation of 2-phenylphenols with aryl iodides proceeds effectively and regioselectively when a palladium catalyst and an appropriate base are employed. The products are 1,2-diphenyl- and 1,2,3-triphenylbenzene derivatives, respectively (see below). Also discussed is the arylation of 1- and 2-naphthols. X = H, OMe; Y = H, Me; Z = H, OMe, NO2.