Pd-Catalyzed Heteroannulation Route to Imidazo[4,5-b]pyridines and -pyrazines (Synfacts, 2012)
Keywords: imidazo[4,5-b]pyridines; imidazo[4,5-b]pyrazines; 3-amino-2-chloropyridines; Chichibabin amination; palladium catalysis; C–N coupling