Synthesis of the naphthoquinone core of divergolides (C–D) and model studies for elaboration of the ansabridge
作者:Sivappa Rasapalli、Gopalakrishna Jarugumilli、Gangadhara Rao Yarrapothu、James A. Golen、Arnold L. Rheingold
DOI:10.1016/j.tetlet.2013.03.022
日期:2013.5
Herein, we describe a facile synthesis of the naphthoquinone fragment of the aromatic core of the novel ansamycins such as hygrocins A–B and the divergolides C–D, starting from the inexpensive 2-hydroxy-3-methylbenzoic acid. We demonstrate the utility of naphthalenic synthon for further elaboration of the ansabridge via C5–C6 bond formation by employing a commercially available sterically demanding
在这里,我们从廉价的2-羟基-3-甲基苯甲酸开始,描述了新型安沙霉素(例如潮霉素A–B和divergolides C–D)芳香核心的萘醌片段的简便合成方法。我们通过使用市售的空间需求性有机镁试剂作为模型ansa链,证明了萘合成子通过C5-C6键形成进一步修饰ansabridge的实用性。还已经实现了在一个罐中将所得的醇容易地转化为靶标的萘醌片段。这些模型研究为生物学上重要的新型安沙霉素的完全合成奠定了基础。