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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
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Major dicaffeoylquinic acids from Artemisia vulgaris

A Carnat1, A Heitz, D Fraisse

  • 1Laboratoire de Pharmacognosie et Phytothérapie, Faculté de Pharmacie, Université d'Auvergne, 28 place Henri Dunant, F-63000 Clermont-Ferrand, France.

Fitoterapia
|July 14, 2001
PubMed

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Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...