Synthesis and Biological Evaluation of (±)-Abyssinone II and Its Analogues as Aromatase Inhibitors for Chemoprevention of Breast Cancer
作者:Arup Maiti、Muriel Cuendet、Vicki L. Croy、Denise C. Endringer、John M. Pezzuto、Mark Cushman
DOI:10.1021/jm070109i
日期:2007.6.1
An efficient and economical synthesis of the naturally occurring aromatase inhibitor abyssinone II was performed. The synthesis features an optimized aromatic prenylation reaction in which an arylcopper intermediate is reacted with prenyl bromide to afford a key intermediate that was converted to a prenylated aromatic aldehyde. Condensation of the aldehyde with an o-hydroxyacetophenone under Claisen-Schmidt
进行了自然产生的芳香化酶抑制剂阿比西酮II的高效经济合成。该合成具有优化的芳族烯丙基化反应,其中芳基铜中间体与异戊烯基溴反应生成关键中间体,该中间体被转化为戊烯基化的芳族醛。在克莱森-施密特条件下,醛与邻羟基苯乙酮缩合得到查尔酮,该查尔酮在乙酸钠存在下在回流的乙醇中脱保护并环化,得到(+/-)-阿比西酮II。合成被证明是足够通用的,以提供一系列被评估为芳香化酶抑制剂的阿比西酮II衍生物。(+/-)-Abyssinone II的4'-羟基甲基化导致芳香化酶抑制活性显着提高,7-羟基的甲基化和异戊二烯基侧链的去除导致活性的进一步降低。这些结构变化的结果是,该系列中最活跃的黄烷酮的效力比(+/-)-阿比西酮II(IC50 40.95 microM)强20倍。