propose that the 6–7 ring system common to each of the frondosins is biosynthesized via ring expansion of a 6–6 ring system. Compelling evidence in favour of this proposal was obtained in the form of a biomimetic synthesis of the frondosin 6–7 ring system, which features a highly stereo- and regio-selective ring expansion cascade reaction as the key step.
frondosins是五种海洋海绵衍生的类萜的家族。我们建议通过6-6环系统的环扩展来
生物合成每种frondosins共有的6-7环系统。仿制药合成frondosin 6-7环系统获得了令人信服的证据,该系统以高度立体和区域选择性环扩展级联反应为关键步骤。