A new synthetic method of 1,2,3-triazole from glyoxal monohydrazone mo
no-oxime (1a) has been developed. 1a obtained by the thermal dispropor
tionation of glyoxal bis-hydrazone (1b) and glyoxime (1c) was treated
with acetic anhydride to give 2-acetyl-1,2,3-triazole, following alcoh
olysis gave 1,2,3-triazole in high yield.