1,2,3-Benzotriazine Synthesis by Heterocyclization of p‑Tosylmethyl Isocyanide Derivatives

An efficient methodology to form 4-alkoxy- and 4-aryloxybenzo[][1,2,3]triazines via an intramolecular heterocyclization of 1-azido-2-[isocyano(-tosyl)methyl]benzenes under basic conditions has been developed. DFT calculations have been performed to further understand the mechanism of this heterocyclization, which occurs in good to excellent yields with a broad scope.