New version of mononuclear heterocyclic rearrangement

Thermal recyclization of the 3-diazenofuroxanyl unit to form the 4-nitro-1,2,3-triazole fragment has been found in noncondensed 1,2,5-oxadiazol 2-oxide derivatives (3,3’-azofuroxans) with acetamido substituents in the 4,4’-positions.