Specific Synthesis of 3H‑Indole Derivatives via Rh(III)-Catalyzed Cascade Annulation between N‑Phenylbenzimidamides and Pyridotriazoles

An efficient synthetic method to construct 3H-indole derivatives has been successfully developed involving rhodium-catalyzed highly selective C–H bond activation of N-phenylbenzimidamides and subsequent couplings with pyridotriazoles. This cascade approach features excellent chemoselectivity and unique of products containing quaternary carbon center with the pyridyl moiety.