作者:Alec Fettes、Erick M. Carreira
DOI:10.1021/jo034964v
日期:2003.11.1
The total synthesis of the biologically active marine natural product leucascandrolide A is reported. A convergent strategy is employed, allowing for the rapid assembly of the macrolide moiety. Key steps of our approach include the diastereoselective addition of a zinc alkynilide to (R)-isopropylidene glyceraldehyde, the enantioselective copper(I) fluoride catalyzed aldol addition of a TMS-dienolate
据报道具有生物活性的海洋天然产物白藜芦醇酯A的全合成。采用会聚策略,允许大环内酯部分的快速组装。我们方法的关键步骤包括:非对映选择性地向(R)-异亚丙基甘油醛中添加炔属锌锌;对映选择性铜(I)氟化的羟醛醇将TMS-二壬酸酯添加至巴豆醛中;以及形成2,6-反式-硒介导的分子内环化作用取代四氢吡喃。此外,在大内酯化反应中观察到的显着溶剂作用表明氢键作用起关键作用。记录了一条通往合成关键中间体的改进途径。