An Efficient Ion-Exchange Resin Catalysts for the Liquid-Phase Selective Hydrazinolysis of Succinic Acid
Dzhumadullaeva S.A. Baeshov A.B.
2024E.A. Buketov Karaganda University Publish house
Eurasian Journal of Chemistry
2024#29Issue 166 - 72 pp.
Dicarboxylic acid dihydrazides are widely used as pharmaceutical intermediates, plant growth regulators, water-based coating additives, epoxy crosslinking agents. Dihydrazides are prepared by adding hydrazine hydrate to an acid halides and diesters. In this work the hydrazinolysis of succinic acid was studied using various ion exchange resins as catalysts, and the optimum conditions and the reaction mechanism were identified. Analysis of the initial reagents and the target product were performed out using photocolorimetric and IR spectroscopic methods, the composition of the target product was determined by elemental analysis. Hydrazinolysis of succinic acid were performed in aqueous medium in the temperature 90 °C for 3 h. Succinic acid conversion was 82–95 %, and the succiniyldihydrazide yield 61–93 %. It has been shown the efficient catalysts for the hydrazinolysis of succinic acid are AV-17-8, AN-31 and AN-1 anion exchangers. The high-est succinyldihydrazide yield (93 %) was obtained with anion exchanger AV-17-8. On the basis of IR spectroscopic studies, a plausible process mechanism was suggested. A probable mechanism of the process with the formation of supramolecular complexes with the participation of substrates and fixed polymer-bound quaternary ammonium and hydroxyl ions of the anion exchanger was proposed. Thus, the most efficient method of succinic acid dihydrazide preparation has been proposed in comparison with known methods.
heterogenious catalyst , hydrazinolysis , ion exchange resins , succinic acid dihydrazide , supramolecular complexes
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Khoja Akhmet Yassawi International Kazakh-Turkish University, B. Sattarchanov avenue, 29, Turkestan, 160200, Kazakhstan
Academician of the National Academy of Sciences of the Republic Kazakhstan, D.V. Sokolsky Institute of Fuel,Catalysis and Electrochemistry, Kunaev street, 142, Almaty, 050010, Kazakhstan
Khoja Akhmet Yassawi International Kazakh-Turkish University
Academician of the National Academy of Sciences of the Republic Kazakhstan
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