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  • 1
    ISSN: 1434-4475
    Keywords: 1,2,4-Triazolines ; (Diaminomethylene)hydrazones ; X-Ray analysis ; NMR-spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Umsetzung von aromatischen Aldehyde-diaminomethylene-hydrazonen1 mit heißem Essigsäureanhydrid oder Benzoylchloride liefert 1,4-Diacyl-3-acylamino-5-aryl-4,5-dihydro-1H-1,2,4-triazole2. Im Gegensatz dazu erhält man aus 4-Pyridinaldehyd-diaminomethylenhydrazon (li) unter den gleichen Reaktionsbedingungen einen neuen O,N-Acetaltyp mit einer 1,2,4-Triazoleinheit. Die Struktur sämtlicher neuer Produkte wurde durch spektroskopische Daten (1H- und13C-NMR, MS, IR) unterstützt; einige repräsentative Vertreter wurden zusätzlich mittles Röntgenstrukturanalyse untersucht.
    Notes: Summary Treatment of aromatic carbaldehyde (diaminomethylene)hydrazones1 with hot acetic anhydride or benzoyl chloride affords 1,4-diacyl-3-acylamino-5-aryl-4,5-dihydro-1H-1,2,4-triazoles2. In contrast, a new type of 0,N-acetal with an 1,2,4-triazole substructure (3) is obtained from 4-pyridine-carbaldehyde (diaminomethylene)hydrazone (li) by using a similar reaction procedure. The structures of all novel compounds were confirmed by spectroscopic data (1H and13C NMR, MS, IR); some representative compounds were also studied by X-ray analysis.
    Type of Medium: Electronic Resource
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