70997-32-9Relevant academic research and scientific papers
Reactions of N'-[2-Oxo-5-R-furan-3(2H)-ylidene]acylhydrazides with Primary and Secondary Alcohols
Igidov, N. M.,Ivanov, D. V.,Kiselev, M. A.,Kizimova, I. A.,Syutkina, A. I.
, p. 815 - 821 (2020/07/03)
Abstract: Reactions of primary and secondary alcohols with N'-[2-oxo-5-R-furan-3(2H)-ylidene]acylhydrazides resulted in the furan ring decylization toform 2-[2-(arylcarbonyl)hydrazinylidene]-4-alkyl esters of R-4-oxobutanoicacids.
TAUTOMERISM IN THE SERIES OF BENZOYLHYDRAZONES OF ALIPHATIC β-DICARBONYL COMPOUNDS
Yakimovich, S. I.,Nikolaev, V. N.,Blokhtina, S. A.
, p. 1247 - 1254 (2007/10/02)
It was shown by PMR spectroscopy that the benzoylhydrazones of aliphatic β-dicarbonyl compounds exist in solutions as tautomeric mixtures of the cyclic 5-hydroxypyrazoline and open forms.The latter are represented by the hydrazone or enehydrazine form or their combination, depending on the structure of the β-dicarbonyl component and the solvent.Increase in the size of the terminal substituent at the C=N bond displaces the equilibrium toward the cyclic 5-hydroxypyrazoline form, and the introduction of strong electron-withdrawing substituents at the C=N bond favors the hydrazone and cyclic forms.The benzoylhydrazones of symmetrical β-diketones have a cyclic 5-hydroxypyrazoline structure.
