New Lipophilic Piceatannol Derivatives Exhibiting Antioxidant Activity Prepared by Aromatic Hydroxylation with 2-Iodoxybenzoic Acid (IBX)
作者:Roberta Bernini、Maurizio Barontini、Carmela Spatafora
DOI:10.3390/molecules14114669
日期:——
Piceatannol (E-3,5,3’,4’-tetrahydroxystilbene) is a phytoalexin synthesized in grapes in response to stress conditions. It exhibits strong antioxidant and antileukaemic activities due to the presence of the catechol moiety. To modify some physical properties like solubility, and miscibility in non-aqueous media some new previously unreported piceatannol derivatives having lipophilic chains on the A-ring were prepared in good yields by a simple and efficient procedure. The key step was a chemo- and regioselective aromatic hydroxylation with 2-iodoxybenzoic acid (IBX). The new compounds showed antioxidant activity and seemed promising for possible applications as multifunctional emulsifiers in food, cosmetic and pharmaceutical fields.
白藜芦醇(E-3,5,3',4'-四羟基芪)是一种植物抗毒素,可在葡萄遭受胁迫条件下合成。由于其含有儿茶酚部分,因此展现出强大的抗氧化和抗白血病活性。为了改善一些物理性质,如在非水介质中的溶解性和可混性,我们采用简单高效的工艺步骤,成功合成了一些先前未报道的、在A环上带有亲脂性链的新型白藜芦醇衍生物,产率良好。关键步骤是使用2-碘氧基苯甲酸(IBX)进行化学和区域选择性的芳香族羟基化。这些新化合物显示出抗氧化活性,并似乎在食品、化妆品和医药领域作为多功能乳化剂具有潜在应用前景。