Monatshefte fur Chemie p. 733 - 746 (1995)
Update date:2022-08-03
Topics:
Gyoergydeak, Z.
Holzer, W.
Kunz, R. W.
Linden, A.
Treatment of aromatic carbaldehyde (diaminomethylene)hydrazones 1 with hot acetic anhydride or benzoyl chloride affords 1,4-diacyl-3-acylamino-5-aryl-4,5-dihydro-1H-1,2,4-triazoles 2.In contrast, a new type of O,N-acetal with an 1,2,4-triazole substructure (3) is obtained from 4-pyridine-carbaldehyde(diaminomethylene)hydrazone (1i) by using a similar reaction procedure.The structures of all novel compounds were confirmed by spectroscopic data (1H and 13C NMR, MS, IR); some representative compounds were also studied by X-ray analysis. - Keywords: 1,2,4-Triazolines; (Diaminomethylene)hydrazones; X-Ray analysis; NMR-spectroscopy
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