Abstract
A series of benzoylacetaldehyde benzoylhydrazones were prepared and characterised. Their UV, IR, and 1H NMR spectra suggest the enol-imine structure rather than the keto-imine form of analogous Schiff bases. The pKa values of these aroylhydrazones were also measured and correlated with the Hammet substitution constants.
Attempted cyclizations of these open-chain aroylhydrazones afforded the corresponding 5-hydroxy-2-pyrazoline compounds rather than the expected pyrazoles.
Received: 1978-7-24
Published Online: 2014-6-2
Published in Print: 1978-12-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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