Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Flavones, oxidation

Flavones and isoflavones (3-aryl-chromones) are quantitatively converted into 2,3-epoxides by exposure to dimethyl dioxirane flavone oxides are quantitatively converted by acid into 3-hydroxy-flavones, which are naturally occurring. ... [Pg.233]

Substances of this nature have a function in the transfer of metabolic hydrogen in plants. In the process, hydrogen peroxide formed by the combination of hydrogen and oxygen oxidizes the flavone derivative in the presence of peroxidase, and in turn the oxidized flavone oxidizes a molecule of ascorbic acid. [Pg.50]

An improvement in the Baker-Venkataraman route to flavonols (2-aryl-3-hydroxychromones) which avoids a final oxidation step of the flavone involves formation of... [Pg.329]

Sutter A, Poulton J, Grisebach H (1975) Oxidation of flavanone to flavone with cell-free extracts from young parsley leaves. Arch Biochem Biophys 170(2) 547-556... [Pg.91]

Stotz G, Forkmann G (1981) Oxidation of flavanones to flavones with flower extracts of Antirrhinum majus (snapdragon). Z Naturforsch 36C 737-741... [Pg.91]

Koch-Haaf reaction, 17, 3 Kornblum oxidation, 39, 3 Kostaneki synthesis of chromanes, flavones, and isoflavones, 8, 3... [Pg.591]

I. values ranged between 1 and 20 mM. The compounds did not act as uncouplers or directly inhibit ATP synthesis. However, naringenln, some of the flavones, and the clnnamates acids inhibited th hydrolysis of ATP catalyzed by mitochondrial Mg -ATPase. The Inhibition of substrate oxidation appears to result from alterations and perturbations induced in the inner membrane as evidenced by Interference with carrier-mediated transport processes. [Pg.247]

In studies with Isolated plant mitochondria, flavones, flava-nones, cinnamic acids, and benzoic acids were shown to Inhibit the oxidation of succinate, malate, and NADH Inhibition was... [Pg.248]

Oxidation of a number of substituted ethenylcyclopropanes to propanecarboxy-lic acids was achieved with RuCyaq. Na(10 )/CCl -CH3CN (Eig. 3.19) [342], while perfluoro alkenes were cleaved by RnO /aq. IO(OH)3, Na(ClO) or CH3COOOH/Ereon 113 to carboxylic acids [343] anthocyanidins, flavones, chal-... [Pg.20]

Jungbluth, G. and Ternes, W., HPLC separation of flavonols, flavones and oxidized flavonols with LTV-, DAD-, electrochemical and ESI-ion trap MS detection, Fresenius J. Anal. Chem., 367, 661, 2000. [Pg.132]

See other pages where Flavones, oxidation is mentioned: [Pg.270]    [Pg.175]    [Pg.16]    [Pg.16]    [Pg.270]    [Pg.175]    [Pg.16]    [Pg.16]    [Pg.580]    [Pg.626]    [Pg.627]    [Pg.96]    [Pg.329]    [Pg.334]    [Pg.96]    [Pg.131]    [Pg.161]    [Pg.843]    [Pg.866]    [Pg.870]    [Pg.870]    [Pg.64]    [Pg.215]    [Pg.106]    [Pg.54]    [Pg.445]    [Pg.69]    [Pg.72]    [Pg.123]    [Pg.198]    [Pg.448]    [Pg.458]    [Pg.459]    [Pg.461]    [Pg.554]    [Pg.679]    [Pg.896]    [Pg.899]    [Pg.1029]    [Pg.1035]    [Pg.1102]   
See also in sourсe #XX -- [ Pg.162 ]



SEARCH



Flavone

Flavone oxidative degradation

© 2024 chempedia.info