Activated Nitriles in Heterocyclic Synthesis: Synthesis ofPyrano[2,3-d ]pyrimidine andPyrano[3,2-e ][1,2,4]triazolo[1,5-c ]pyrimidineDerivatives

Abstract

Several newnaphtho[2′,1′:5,6]pyrano[2,3-d ]pyrimidineshave been synthesized via hydrazinolysis of a2-ethoxymethylideneaminonaphtho[1,2-b ]pyran;polysubstitutedpyrano[3,2-e ][1,2,4]triazolo[1,5-c ]pyrimidineshave also been prepared.