Facile Synthesis of 2,6-Diaryl-4-Secondary Aminonicotinonitriles and Highly Substituted Unsymmetrical 2,2 '-Bipyridines

[摘要]：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.

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