Rh(III)-Catalyzed C–H Cyanation of 2<i>H</i>‑Indazole with <i>N</i>‑Cyano‑<i>N</i>‑phenyl‑<i>p</i>‑toluenesulfonamide

A Rh­(III)-catalyzed direct cyanation of 2H-indazoles with N-cyano-N-phenyl-p-toluenesulfonamide has been realized via a chelation-assisted strategy. The methodology enables regioselective access to various ortho-cyanated phenylindazoles in good yields with a broad substrate scope and good functional group compatibility. The obtained cyanated indazoles could further be converted into other value-added chemicals. Importantly, the current protocol is featured with several characteristics, including a novel cyanating agent, good regioselectivity, and operational convenience.