Kinetics of Hydrolysis of Aromatic Hydrazones (CROSBI ID 637904)
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Podaci o odgovornosti
Benković, Tomislav ; Kontrec, Darko ; Budimir, Ana ; Galić, Nives
engleski
Kinetics of Hydrolysis of Aromatic Hydrazones
The kinetics of hydrolysis of compounds 1–12 (Scheme 1) were investigated in acidic and basic methanol/water 1/1 solutions by means of UV-Vis spectrophotometry. Hydrolytic stabilities of 3, 4, 10 and 11 were also studied by HPLC. Hydrolytic products of 3, 4, 5, 7 and 10 in basic media were determined by ESI-MS. The electron-withdrawing substituents decreased the hydrolysis in acidic media, whereas the electron-donating groups (–OH, – OCH3) had the opposite effect. The hydroxyl group at position 4 at salycilidene part of the molecule, and methyl group at azomethine carbon atom, prevented the hydrolysis of hydrazones in basic media. In addition, the hydroxyl groups at position 3 and 5 caused the autooxidation of the hydrolytic products, and conversion of aldehydes to respective quinones. The results obtained by different techniques were in excellent agreement.
aroylhydrazones ; hydrolysis ; spectrophotometry ; chromatography
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Podaci o prilogu
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Podaci o skupu
16th CEEPUS Symposium and Summer School on Bioanalysis
poster
06.07.2016-15.07.2016
Varšava, Poljska