Facile synthesis of 2,6‐diaryl‐4‐secondary aminonicotinonitriles and highly substituted unsymmetrical 2,2′‐bipyridines

Abstract magnified image The ring transformation of 2H ‐pyran‐2‐one by N ‐aryl amidine in the presence of KOH in DMF at room temperature resulted in a facile synthesis of the 2,6‐diaryl‐4‐secondary aminonicotinonitrile and highly substituted unsymmetrical 2,2′‐bipyridines in moderate yield. J. Heterocyclic Chem., (2010).