Ionic Liquid Promoted Facile One-Pot Synthesis of 1-Pyridylimidazo[1,5-a]pyridines from Dipyridylketone and Aryl Aldehydes - Siddiqui, Shafi A; Potewar, Taterao M; Lahoti, Rajgopal J; Srinivasan, Kumar V (Synthesis, 2006)