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Issue 11, 2009
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A selective de-O-methylation of guaiacyl lignans to corresponding catechol derivatives by 2-iodoxybenzoic acid (IBX). The role of the catechol moiety on the toxicity of lignans

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Abstract

We report here the first selective de-O-methylation of a large panel of guaiacyl lignans to the corresponding catechol derivatives by using IBX as primary oxidant under green conditions (dimethyl carbonate–H2O solvent) through an in situreduction procedure. The influence of the catechol moiety on the cytotoxicity and genotoxicity of new lignan derivatives has been investigated. The results obtained indicated that the presence of the catechol moiety sharply enhances the clastogenic potential (e.g. induction of chromosomal aberrations), the cytotoxicity and the modulation of cell cycle progression with respect to the parent compounds. Thus, despite the in vitroantioxidant activity usually described for catechol derivatives, our results show for the first time the generation of a clastogenic potential, highly indicative of a long-term genetic and cancer risk.

Graphical abstract: A selective de-O-methylation of guaiacyl lignans to corresponding catechol derivatives by 2-iodoxybenzoic acid (IBX). The role of the catechol moiety on the toxicity of lignans

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Publication details

The article was received on 17 Dec 2008, accepted on 05 Mar 2009 and first published on 03 Apr 2009


Article type: Paper
DOI: 10.1039/B822661J
Citation: Org. Biomol. Chem., 2009,7, 2367-2377
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    A selective de-O-methylation of guaiacyl lignans to corresponding catechol derivatives by 2-iodoxybenzoic acid (IBX). The role of the catechol moiety on the toxicity of lignans

    R. Bernini, M. Barontini, P. Mosesso, G. Pepe, S. M. Willför, R. E. Sjöholm, P. C. Eklund and R. Saladino, Org. Biomol. Chem., 2009, 7, 2367
    DOI: 10.1039/B822661J

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