作者:Benjamin D. Horning、David W. C. MacMillan
DOI:10.1021/ja402933s
日期:2013.5.1
highly enantioselective total synthesis of the akuammiline alkaloid (-)-vincorine has been accomplished. A key element of the synthesis is a stereoselective organocatalytic Diels-Alder, iminium cyclization cascade sequence, which serves to construct the tetracyclic alkaloid core architecture in one step from simple achiral precursors. The challenging seven-membered azepanyl ring system is installed by way
已经完成了 akuammiline 生物碱 (-)-vincorine 的简洁且高度对映选择性的全合成。该合成的一个关键要素是立体选择性有机催化 Diels-Alder、亚胺鎓环化级联序列,其用于从简单的非手性前体一步构建四环生物碱核心结构。具有挑战性的七元氮杂环系统是通过从酰基碲化物前体引发的单个电子介导的环化事件安装的。(-)-vincorine 的全合成是通过 9 个步骤和 9% 的总产率从市售起始材料中实现的。