Dihydroquercetin was converted to nitroso derivative by treatment with nascent nitrous acid in aqueous solution. The chemical structure of the synthesized compound was determined by quantitative 1H and 13C NMR spectroscopy. As shown by the NMR spectra, the nitroso group is incorporated at the catechol ring of the flavonoid. The antiradical properties of nitrosated dihydroquercetin were evaluated by inhibition of the pyrocondensate formed in ethylene and propylene production, which readily polymerizes upon heat treatment. Nitrosated dihydroquercetin is 10–15% more active than the initial compound. The probable mechanisms of the radical-scavenging action of nitrosated dihydroquercetin are considered.
Russian Journal of Applied Chemistry – Springer Journals
Published: Mar 25, 2015
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