Alkylating capacity and reaction products of antimalarial trioxanes after activation by a heme model.
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.
Cazelles
Jérôme
J
Laboratoire de Chimie de Coordination du CNRS, 205, route de Narbonne, F-31077 Toulouse Cedex 4, France.
Robert
Anne
A
Meunier
Bernard
B
D000478:Alkylation; D000962:Antimalarials / Q000737:chemistry*; D006418:Heme / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008956:Models, Chemical; D015394:Molecular Structure
D000962:Antimalarials; D006418:Heme