Abstract

N-Substituted tetrazole was attempted to formylate which led to the formation of a novel triazene by opening of tetrazole ring via unusual Vilsmeir-Haack reaction. The formed product was proved by spectral analyses and X-Ray diffraction studies.

Keywords: Sydnone, triazole, terazole, formylation, iminium cation, Vilsmeir-Haack reaction.