Reaction of N ¹,N ²-Diarylamidines with (2,3-Diphenylcyclopropen-1-ylidene)propanedinitrile: Synthesis of [2-Arylamino-4(1H)-pyridinylidene]-propanedinitriles

Abstract

A series of new [1-aryl-2-arylamino-5,6-diphenyl-4(1H)-pyridinylidene)propanedinitriles 3a-e has been synthesized by the reaction of N ¹,N ²-diarylamidines 1a-e with (2,3-diphenylcyclopropen-1-ylidene)propanedinitrile (2). Structures of 3a-e have been assigned on the basis of NMR spectra and NOE experiments.

Key words

pyridines - regioselectivity - ring expansion - cycloaddition - dicyanomethylene compounds

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