Hydrogen-donating mechanism of rosmariquinone, an antioxidant found in rosemary

Clifford A. Hall, Susan L. Cuppett, Pat Dussault

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Rosmariquinone (RQ), an ortho-quinone diterpenoid found in rosemary, was shown to act as a hydrogen-donating antioxidant. The proposed mechanism is based on the isolation of the catechol intermediate arucadiol (AD) in methyl oleate test systems. AD was also observed in a bulk soybean oil oxidation experiment, which supports the observation that RQ is converted to AD during oxidation of the oil. Because AD was found in both light-induced oxidation and autoxidation test systems, the antioxidant mechanism proceeds in a similar manner. The antioxidant activities of RQ and AD were not significantly different in the autoxidation experiments, while AD was a significantly better (P < 0.05) antioxidant than RQ in the light-induced oxidation.

Original languageEnglish (US)
Pages (from-to)1147-1154
Number of pages8
JournalJAOCS, Journal of the American Oil Chemists' Society
Volume75
Issue number9
DOIs
StatePublished - Sep 1998

Keywords

  • Arucadiol
  • Autoxidation
  • Hydrogen-donating mechanism
  • Light-induced oxidation
  • Rosmariquinone

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry

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