Synthesis and antioxidative activity of metalloporphyrins bearing 2.6-di-tert-butylphenol pendantsстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Synthesis and antioxidative activity of metalloporphyrins bearing 2.6-di-tert-butylphenol pendants / E. R. Milaeva, O. A. Gerasimova, J. Zhang et al. // Journal of Inorganic Biochemistry. — 2008. — Vol. 102, no. 5-6. — P. 1348–1358. The novel metalloporphyrins (M = HH, Fe, Mn, Co, Cu, Zn) bearing 2,6-di-tert-butylphenol pendants as antioxidant substituents, and a long chain hydrocarbon palmitoyl group have been synthesized. The oxidation of compounds by PbO2 leads to the formation of the corresponding 2,6-di-tert-butylphenoxyl radicals studied by EPR. The activity of porphyrins in lipid peroxidation has been examined using (1) in vitro lipid peroxidation induced by tert-butylhydroperoxide in respiring rat liver mitochondria, (2) in vitro lipid peroxidation in liver homogenates of Wistar strain rats, and (3) a model process of peroxidation of (Z)-octadec-9-enic (oleic) acid as a structural fragment of lipids. The activity of these compounds depends dramatically on the nature of metal and might be changed from antioxidative (M = HH, Mn, Cu, Zn) to indifferent (M = Co), and to pro-oxidative one (M = Fe). The anti- or pro-oxidative action of these compounds may be derived from the concurrence between the involvement of 2,6-di-tert-butylphenol pendants acting as radical scavengers and redox active metal center promoting oxidation processes. The results of this study suggest that the polytopic compounds combining in one molecule 2,6-di-tert-butylphenol pendants, metalloporphyrin moiety, and a palmitoyl group, are membrane active compounds and might be studied in an effort to find novel pharmaceutical agents. (C) 2008 Elsevier Inc. All rights reserved. [ DOI ]

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