Polyphenols from Eucalyptus consideniana and Eucalyptus viminalis

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S C Santos1, P G Waterman

  • 1Instituto de Química, Universidade Federal de Goiás, Campus Samambaia, Caixa Postal 131, CEP 74001-970, Goiânia, Goiás, Brazil. suzana@quimica.ufg.br

Fitoterapia
|February 13, 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...