Abstract
The electrochemical oxidation of the antineoplastic agent etoposide in aqueous solution at a glassy carbon electrode shows an overall two electron transfer. At pH < 2.5, the oxidation proceeds in one voltammetric oxidation step. At pH ⩾ 2.5, the oxidation proceeds in two voltammetric oxidation steps. The first voltammetric oxidation step (peak i 1 ) is a reversible 1 e − transfer resulting in a stable radical. The second step (peak i 11 ) corresponds to the transfer of the second electron. The product formed after 2 e − oxidation is an unstable cation which undergoes rapid conversion into the orthoquinone. The orthoquinone has been isolated and characterized.
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