We describe several approaches to the tricyclic core of conodusine A. Synthesis of a macrocyclic alkene set the stage for 1,2-olefin difunctionalization with conodusine’s pendent amine. Unanticipated reactivity of an unusually labile indole mitigated the desired olefin manipulation. Efforts to pre-install the oxidation state at C19 before macrocyclic ring closure were met with unexpected results. Additionally
我们描述了几种获得 conodusine A
三环核心的方法。大环烯烃的合成为用 conodusine 的侧胺进行 1,2-烯烃双官能化奠定了基础。异常不稳定的
吲哚的意外反应性减轻了所需的烯烃操作。在大环闭合之前预先设定 C19 氧化态的努力得到了意想不到的结果。此外,Conodusine 完整碳骨架的后期烯丙基氧化充满了不可预见的挑战。