“…Spontaneous oxidation of a hydrazo substituent to form a triazole ring was described by Fromm in his preparation of 1-phenyl-5-[(E)-2-phenyldiazenyl]-1,2-dihydro-3H-1,2,4-triazole-3-thione. 12 Azotriazoles similar to compounds 15a-d have been described as dyes. We also investigated reactions of imine 1 with acyl hydrazides.…”