The bengazoles are marine natural products with unique structure, containing two oxazole rings flanking a single carbon. They show very potent antifungal activity. The total syntheses of bengazole C and E are described following a convergent route which involves diastereoselective cycloaddition of an appropriately substituted nitrile oxide with a butane-1,2-diacetal-protected alkenediol as the key step.
bengazoles是具有独特结构的海洋天然产物,包含两个环氧唑环环绕着一个碳原子。它们表现出非常强大的抗真菌活性。bengazole C和E的全合成描述了沿着一个汇聚路线进行,其中包括一个适当取代的亚硝基氧化物与一个丁烷-1,2-二缩醛保护的烯二醇的立体选择性环加成作为关键步骤。