作者:Patrick D. Bailey、Keith M. Morgan、David I. Smith、John M. Vernon
DOI:10.1039/b005694o
日期:——
The tetracyclic advanced intermediates 6, 8 and 9 obtained from L-tryptophan via a cis-selective Pictet–Spengler reaction and a Dieckmann–Thorpe cyclisation are used in a range of new approaches to polycyclic monoterpenoid indole alkaloids such as ajmaline and suaveoline. Structural modifications designed to facilitate a key intermolecular addition to C15 (ajmaline numbering) are described, followed by two intramolecular routes based on the addition of a suitable carbon fragment to a remote nitrogen atom prior to bond formation at C15.
通过顺式选择性 Pictet-Spengler 反应和 Dieckmann-Thorpe 环化从 L-色氨酸获得的四环高级中间体 6、8 和 9 可用于一系列制备多环单萜吲哚生物碱(如 ajmaline 和 suaveoline)的新方法。描述了旨在促进 C15 关键分子间加成(ajmaline 编号)的结构修饰,然后是基于在 C15 处形成键之前将合适的碳片段添加到远程氮原子的两条分子内路线。