Collective Total Syntheses of Atisane-Type Diterpenes and Atisine-Type Diterpenoid Alkaloids: (±)-Spiramilactone B, (±)-Spiraminol, (±)-Dihydroajaconine, and (±)-Spiramines C and D
作者:Hang Cheng、Fan-Hao Zeng、Xue Yang、Yin-Juan Meng、Liang Xu、Feng-Peng Wang
DOI:10.1002/anie.201508996
日期:2016.1.4
complex atisane‐type diterpenes and biogenetically related atisine‐type diterpenoid alkaloids (±)‐spiramilactone B, (±)‐spiraminol, (±)‐dihydroajaconine, and (±)‐spiramines C and D are reported. Highlights of the synthesis include a late‐stage biomimetic transformation of spiramilactone B, a facile formal lactone migration from the pentacyclic skeleton of spiramilactone E, a highly efficient and diastereoselective
报道了建筑上复杂的atisane型二萜和与生物遗传相关的atisine型二萜生物碱(±)-螺氨基内酯B,(±)-螺氨基,(±)-二氢邻苯二甲胺和(±)-螺胺C和D的首次合成。合成的亮点包括螺环内酯B的后期仿生转化,螺环内酯E的五环骨架的便捷形式内酯迁移,高效和非对映选择性的1,7-烯炔环异构化反应,以构建功能化的四环异环烷骨架,以及串联retro-Diels–Alder /分子内Diels–Alder序列可实现三环[6.2.2.0]环系统。