作者:Xinghui Li、Zeliang Zhang、Huafang Fan、Yinlong Miao、Hailong Tian、Yucheng Gu、Jinghan Gui
DOI:10.1021/jacs.0c13426
日期:2021.4.7
Pinnigorgiols B and E are 9,11-secosteroids with a unique tricyclic γ-diketone framework. Herein, we report the first synthesis of these natural products from inexpensive, commercially available ergosterol. This synthesis features a semipinacol rearrangement and an acyl radical cyclization/hemiketalization cascade; the latter efficiently assembled the tricyclic γ-diketone skeleton, with two rings and
Pinnigorgiols B 和 E 是 9,11-secosteroids,具有独特的三环 γ-二酮框架。在此,我们报告了从廉价的市售麦角甾醇首次合成这些天然产物。该合成具有半频哪醇重排和酰基自由基环化/半缩酮化级联反应;后者有效地组装了三环γ-二酮骨架,一步形成了两个环和三个连续的立体中心。