Electrochemical evaluation of lipophilic antioxidants from Iryanthera juruensis fruits (Myristicaceae)
- Resource Type
- article
- Authors
- Silva, D. H. S.; Pereira, F. C.; Yoshida, M.; Zanoni, M. V. B.
- Source
- Eclética Química. September 2005 30(3)
- Subject
- Iryanthera juruensis
antioxidants
cyclic voltammetry
Myristicaceae
- Language
- English
- ISSN
- 0100-4670
TLC autographic assays revealed in the hexane extract of Iryanthera juruensis (Myristicaceae) the presence of two compounds, with antioxidant properties towards beta-carotene. They were isolated and identified as 3-methyl-sargachromenol (1) and sargachromenol (2). Further investigation of the hexane extract led to isolations of 3-methyl-sargaquinoic acid (3) and sargaquinoic acid (4). The electrochemical behaviour of these compounds was studied in CH2Cl2/Bu4NBF4 at glassy carbon electrode. The phenolic group in both tocotrienols 1 and 2 are oxidized at +0.23V and +0.32V and their oxidation potentials are correlated with the observed antioxidant activities and oxidation mechanism of alpha-tocopherol. The reductive voltametric behaviour of quinone function in both plastoquinones 3 and 4 is discussed.