Alkylating capacity and reaction products of antimalarial trioxanes after activation by a heme model
Jérôme Cazelles1, Anne Robert, Bernard Meunier
1Laboratoire de Chimie de Coordination du CNRS, 205, route de Narbonne, F-31077 Toulouse Cedex 4, France.
Abstract:
The reactivity of 1,2,4-trioxane molecules 2-5, structurally related to the antimalarial drug artemisinin, with a heme model, manganese(II) tetraphenylporphyrin, is reported. With the pharmacologically active drugs 2-4, covalent adducts were obtained by addition of a drug-derived radical onto the porphyrin macrocycle, whereas no reaction was obtained with the nonactive compound 5. This confirms that alkylation is probably one of the key factors of the pharmacological activity of endoperoxide-based antimalarial drugs.
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