Azido-1,2,5-oxadiazoles in reactions with 1,3-dicarbonyl compounds

The 1,3-dipolar cycloaddition of azido-1,2,5-oxadiazoles (azidofurazans) to dicarbonyl compounds was studied, and a new procedure for the synthesis of 4-R-3-(4-R1-5-R2-1,2,3-triazol-1-yl)-1,2,5-oxadiazoles was proposed.