Synthesis of 1-hydroxybenzotriazoles angularly annulated by furazan or furoxan rings

Article abstract of DOI:10.1007/s11172-009-0329-3

Synthesis of 6-hydroxy-6H-[1,2,3]triazolo[4,5-e][2,1,3]benzoxadiazole and a mixture of isomeric 6-hydroxy-6H-[1,2,3]triazolo[4,5-e][2,1,3]benzoxadiazole- 1(3)-oxides is carried out starting from 2,4-dinitrosoresorcinol. Total assignment of the signals in the ¹³C NMR spectra of O-methylated products of these compounds is performed.