作者:Barla Thirupathi、Raghava Gundapaneni、Debendra Mohapatra
DOI:10.1055/s-0031-1289529
日期:2011.11
First total syntheses of the macrocyclic natural products (3R,5R)-sonnerlactone and (3R,5S)-sonnerlactone, two new metabolites isolated from the endophytic fungus strain Zh6-B1, have been accomplished in eleven steps with 22% overall yield starting from enantiomerically pure (R)-propylene oxide prepared by hydrolytic kinetic resolution. Other key steps are Sharpless epoxidation, reductive elimination of iodo epoxide, and ring-closing-metathesis reaction for the construction of the macrolactone.
从内生真菌菌株 Zh6-B1 分离出的两种新的代谢产物 (3R,5R)-sonnerlactone 和 (3R,5S)-sonnerlactone,从对映体纯的 (R)-propylene oxide 开始,通过十一个步骤首次完成了大环天然产物 (3R,5R)-sonnerlactone 和 (3R,5S)-sonnerlactone 的全合成,总收率为 22%。其他关键步骤包括 Sharpless 环氧化反应、碘环氧化物的还原消除反应以及用于构建大内酯的闭环-甲基化反应。