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- W2006080212 abstract "Abstract Electroreduction of 4-pyridoxic acid (PA), the final product of vitamin B-6 catabolism, is investigated at neutral pH. The course of the exhaustive electrolysis is monitored by cyclic voltammetry and UV-visible spectroscopy. The electroreduction corresponds to an exchange of four electrons per reagent molecule. The isolation and identification of the reduction products are achieved by column chromatography, 1 H-NMR and mass spectrometries. A mixture of two different 2-methyl-3-hydroxy-pyridine derivatives (ratio 2:1) is formed during the electroreduction. The absorption and emission properties of these products match those of other derivatives bearing the basic ring and substituents. The results strongly support an electroreduction involving hemiacetal ring cleavage in place of aldehyde group as an intermediate step in the four electron process. This means a significant difference with other activated monocarboxylic acids and may involve no formation of pyridoxal aldehyde and pyridoxine. The formation of pyridoxal hydrate from PA by a two-electron transfer and its further transformation into hemiacetal seems to play an essential role at the electrode surface." @default.
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- W2006080212 date "1996-02-01" @default.
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- W2006080212 title "Electrochemical reduction of the final product of vitamin B-6 catabolism: a spectroscopic characterization of the reduced products of 4-pyridoxic acid" @default.
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- W2006080212 doi "https://doi.org/10.1016/0022-0728(95)04217-2" @default.
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