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- W4256117769 abstract "Hydurilic acid, 1,1′-dimethylhydurilic acid and 1,1′,3,3′-tetramethylhydrurilic acid are electrochemically oxidized at the pyrolytic graphite electrode by way of two principla voltammetric oxidation peaks. The first, least positive peak (peak Ia) is due to a quasireversible 2e electrode reaction to give dehydrohydurilic acid. The latter species then rapidly undergoes a pseudo first order chemical reaction to form 5-hydroxyhydurilic acid. The mechanism of the e.c. electrode reaction has been confirmed by double potential step chronoamperometry. Rate constants for the initial electron transfer and follow-up chemical reaction have been measured. The more positive voltammetric peak (peak IIa) appears to proceed by a 4e-2H+ oxidation of hydurilic acid to give a dication which then undergoes nucleophilic attack by water and/or chloride ion to give 5,5′-dichlorohydurilic acid, alloxantin and 5-chloro-5′-hydroxyhydurilic acid. Further decomposition and electrochemical oxidation of the decomposition products results in formation of alloxan, 5,5′-dichlorobarbituric acid and some additional 5,5′-dichlorohydurilic acid." @default.
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- W4256117769 date "1975-11-25" @default.
- W4256117769 modified "2023-10-18" @default.
- W4256117769 title "Electrochemical oxidation of hydurilic acid" @default.
- W4256117769 doi "https://doi.org/10.1016/0368-1874(75)85197-5" @default.
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