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Two oxidation pathways of bioactive flavonol rhamnazin under ambient conditions

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    0428563 - ÚFCH JH 2015 RIV GB eng J - Journal Article
    Ramešová, Šárka - Degano, I. - Sokolová, Romana
    Two oxidation pathways of bioactive flavonol rhamnazin under ambient conditions.
    Electrochimica acta. Roč. 133, JUL 2014 (2014), s. 359-363. ISSN 0013-4686. E-ISSN 1873-3859
    Grant - others:Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR M200401201
    Program: M
    Institutional support: RVO:61388955
    Keywords : oxidation * flavonoids * rhamnazin
    Subject RIV: CG - Electrochemistry
    Impact factor: 4.504, year: 2014

    Two pathways of the oxidation mechanism of rhamnazin under ambient conditions are proposed. The redox potential of rhamnazin strongly depends on the presence of dissociation forms in solution. In situ spectroelectrochemistry and identification of degradation products by HPLC-DAD and HPLC–ESI-MS/MS confirmed the presence of fast subsequent chemical reactions following the electron transfer. As demonstrated, strict anaerobic conditions have to be preserved in studies of antioxidant properties and of its pharmacological efficiency. In the absence of oxygen, 2,4-dihydroxy-2-(4 -hydroxy-3 -methoxybenzoyl)- 6-methoxy-benzofuran-3(2H)-one was identified as the only oxidation product.
    Permanent Link: http://hdl.handle.net/11104/0233907

     
     
Number of the records: 1  

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