A novel approach to functionalised piperidines is described through a [3 + 3] cycloaddition reaction of aziridines with Pd-trimethylenemethane complexes. Importantly, the employment of enantiomerically pure aziridines (prepared in three steps from the appropriate amino acids) allows the corresponding piperidines to be furnished in enantiomerically pure form. Additionally, the application of this technique in the total synthesis of (-)-pseudoconhydrine is described.
描述了一种通过
氮杂环丙烷与Pd-三甲基亚甲基复合物的[3 + 3]环加成反应制备功能化
哌啶的新方法。重要的是,通过使用手性纯
氮杂环丙烷(从适当的
氨基酸经过三步制备),可以使相应的
哌啶以手性纯形式获得。此外,还描述了这一技术在(-)-伪氢化可的因的全合成中的应用。