Preparation of 3‑Aryl-2-aminoindoles via Rhodium-Catalyzed Coupling Reaction between 2‑Arylpyridines and 3‑Diazoindolin-2-imines

Rhodium-catalyzed coupling reaction of 3-diazo­indolin-2-imines with 2-aryl­pyridines, 2-phenyl­pyrimidines, or 1-phenyl­pyrazoles furnished the corresponding 3-aryl-2-amino­indoles in moderate to excellent yields. A variety of functional groups were tolerant to the reaction conditions.