We have studied the 1,3-dipolar cvcloaddition of azidofi.azans to morpholinonitroethene and prepared 1,2,3-triazoles with furazan ring in position 1 and NO: group at position 4.

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Nitro , nitroso , and azo 1,2,5 oxadiazoles with 4 R 1 5 R 2 1,2,3 triazol 1 yl substituents were synthesized by oxidation of amino (1,2,3 triazol 1 yl) 1,2,5 oxadiazoles (aminotri azolylfurazans). Azido 1,2,5 oxadiazole was prepared by diazotization of amino(triazo lyl)furazan followed by treatment of the diazonium salt with sodium azide. Depending on the nature of the substituents and the reagent, triazolylfurazans can undergo destruction to give amino R furazans (R = NO 2 , N 3 , aminofurazanylazo), the amino group being formed from the triazole ring.