diastereoselective alkenylzinc addition allowing rapid access to the common aglycon. Attachment of each relevant L‐configured sugar resulted in the first total synthesis of callipeltoside B (see scheme), and the syntheses of callipeltosides A and C.
上演帽子戏法:描述了整个卡佩尔toside
天然产物家族的合成方法。合成的关键是通过非对映选择性链烯基
锌的加成将二烯-炔和
吡喃片段偶联,从而可以快速进入常见的糖苷配基。每种相关的L-构型糖的附着导致了卡培尔多甙B的第一个全合成(参见方案)以及卡培尔多甙A和C的合成。