Electrochemical reactivity of biologically active quinone/hydroquinone sesquiterpenoids on glassy carbon electrodes
1987; Elsevier BV; Volume: 17; Issue: 3 Linguagem: Inglês
10.1016/0302-4598(87)80064-8
ISSN1872-8049
AutoresIbro Tabaković, Asima Davidović, Wernér E.G. Müller, Rudolf K. Ζahn, Dušan Sladić, Nikola Dogović, Miroslav J. Gašić,
Tópico(s)Marine Sponges and Natural Products
ResumoThe redox reactivity of avarone and avarol, a quinone/hydroquinone couple isolated from the marine sponge Dysidea avara, was investigated by cyclic voltammetry, using a glassy carbon electrode. Both oxidation of avarol and reduction of avarone in aqueous ethanol (1:1 V/V) take place by a 2 e− process at a wide range of pH values; in acetonitrile, however, the reduction of avarone occurs as a stepwise electron transfer process. The mechanisms, as well as the scope and limitations of the method are discussed with reference to the biological activity of the two sesquiterpenoids.
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