Synthesis of 3,3-disubstituted 1-(1H-tetrazol-5-ylmethoxy)triaz-1-ene 2-oxides

3,3-Disubstituted 1-(tetrazol-5-ylmethoxy)triaz-1-ene 2-oxides were synthesized by heating the corresponding 1-cyanomethyl derivatives with sodium azide in DMF. The starting 1-cyanomethyl derivatives were prepared by either the reaction of chloroacetonitrile with the salts of 3,3-disubstituted 1-hydroxytriaz-1-ene 2-oxides or successive transformations of these salts to 1-methoxycarbonylmethyl and 1-carbamoylmethyl derivatives and further to 1-cyanomethyl derivatives.