Synthesis of Spirocyclic Imines: Key Pharmacophores in the Shellfish Toxins Spirolides and Gymnodimine
作者:Margaret A. Brimble、Michael Trzoss
DOI:10.1055/s-2003-41481
日期:——
The efficient synthesis of several spirocyclic imines of similar structure to that present in the shellfish toxins, the spirolides and gymnodimine, is described. The key steps involved double α-alkylation of simple lactam starting materials, Grubbs’ ring closing metathesis of the resultant bis-alkylated lactams and LiEt3BH reduction of the TEOC protected lactams to imines.
本文介绍了几种结构类似于贝类毒素、螺内酯和钩藤碱的螺环亚胺的高效合成方法。关键步骤包括简单内酰胺起始原料的双δ-烷基化、由此产生的双烷基化内酰胺的格拉布斯闭环偏析以及 TEOC 保护内酰胺到亚胺的 LiEt3BH 还原。