An Efficient Synthesis of Neoflavonoid Antioxidants Based on Montmorillonite K-10 Catalysis
作者:Jian-Ming Lee、Tsui-Hwa Tseng、Yean-Jang Lee
DOI:10.1055/s-2001-18436
日期:——
A new approach to synthesis of neoflavonoids, based on a high yielding Montmorillonite K-10 catalyzed lactone ring forming cyclization process, is described. The utility of this methodology is exemplified by its employment in the preparation of the substituted 4-phenylneoflavonoids 1-8. The free radical scavenging properties of these substances were evaluated. The neoflavonoids 1 and 5, which mimic esculetin-type antioxidants, were observed to quench hydrazyl free radicals.
描述了一种基于高产量的蒙脱石K-10催化的内酯环形成环化过程的合成新黄酮类化合物的新方法。通过制备取代的4-苯基新黄酮1-8,展示了该方法的应用价值。评估了这些物质的自由基清除特性。观察到模拟七叶亭类抗氧化剂的新黄酮1和5能清除羟自由基。