H. Yashioka et al., NEW SYNTHETIC ROUTE TO IMIDAZO[4,5-C]PYRIDINES BY THE THERMAL ELECTROCYCLIC REACTION OF 1-AZAHEXATRIENE SYSTEMS, Heterocycles, 41(1), 1995, pp. 161-174
New routes to 1H- and 3H-imidazo[4,5-c]pyridines have been developed b
y the thermal electrocyclic reaction of 1-azahexatriene systems involv
ing the imidazole 4,5-bond.