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Yan CG, Wang QF, Song XK, Sun J. One-step synthesis of pyrido[1,2-a]benzimidazole derivatives by a novel multicomponent reaction of chloroacetonitrile, malononitrile, aromatic aldehyde, and pyridine. J Org Chem. 2009 Jan 16;74(2):710–8. doi: 10.1021/jo802166t. PMID: 19072237. |