undecose nucleosideantibiotics, were synthesized using a samarium diiodide (SmI2) mediated aldol reaction with the use of α-phenylthioketone as an enolate. The characteristics of the SmI2-mediated aldol reaction are that the enolate can be regioselectively generated and the aldol reaction proceeds under near neutral condition. This reaction is proved to be a powerful reaction for the synthesis of complex
除草素 B 和完全保护的衣胺尿嘧啶是未脱糖的核苷抗生素,它们是使用二碘化钐 (SmI2) 介导的醇醛反应合成的,使用 α-苯基硫酮作为烯醇化物。 介导的羟醛反应的特点是可以区域选择性地生成烯醇化物,羟醛反应在接近中性的条件下进行。该反应被证明是合成复杂核苷类抗生素的有力反应。caprazamycins的核心结构caprazol的合成是通过包括β-选择性核糖基化而不使用相邻基团参与和通过修饰的还原胺化构建二氮杂环酮的策略进行的。我们的合成路线将提供一系列具有部分结构的关键类似物来定义药效团,
Total Synthesis of Caprazol, a Core Structure of the Caprazamycin Antituberculosis Antibiotics