Total Synthesis of Gelsemoxonine through a Spirocyclopropane Isoxazolidine Ring Contraction
作者:Stefan Diethelm、Erick M. Carreira
DOI:10.1021/jacs.5b02574
日期:2015.5.13
of this plant incorporating a highly functionalized azetidine at its core. We herein report a full account of our studies directed toward the total synthesis of gelsemoxonine that relies on a conceptually new approach for the construction of the central azacyclobutane. A spirocyclopropane isoxazolidine ring contraction was employed to access a key β-lactam intermediate, which could be further elaborated
一千多年来,Gelsemium 属的植物已在传统亚洲医学中得到应用。Gelsemoxonine 代表了这种植物的一种新成分,其核心是高度功能化的氮杂环丁烷。我们在此报告了我们针对凝胶莫索宁全合成的研究的完整描述,该研究依赖于构建中央氮杂环丁烷的概念上的新方法。使用螺环丙烷异恶唑烷环收缩来获得关键的 β-内酰胺中间体,该中间体可以进一步细化为天然产物的氮杂环丁烷。在我们的研究过程中,我们对这种有趣的转变有了详细的了解。此外,我们报告了先前未被注意到的凝胶莫索宁寡聚化学。