Phenylglyoxal bis(acetylhydrazone) was oxidised to 1-acetamido-4-phenyl-1,2,3-triazole, whereas its bis-(aroylhydrazones) yielded 1-α-benzoyloxybenzylideneamino-4-phenyl-1,2,3-triazoles. Boiling these with concentrated hydrochloric acid resulted in migration of the amino-group to position 5.
H. El Khadem, M. A. E. Shaban and M. A. M. Nassr, J. Chem. Soc. C, 1970, 2167 DOI: 10.1039/J39700002167
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