作者:Stéphane Poigny、Michèle Guyot、Mohammad Samadi
DOI:10.1021/jo9805192
日期:1998.8.1
The total synthesis of (-)-ilimaquinone, a metabolite isolated from sea sponges, is described. The key step of the synthesis is the attachment of the quinone moiety to the drimane skeleton. Alkylation of enone 11 obtained in four steps from the readily available diketone 8, with tetramethoxybenzyl bromide 15 as the alkylating agent, led to addition product 16 in excellent yield. The presence of the
描述了从海海绵中分离出的代谢物(-)-ilimaquinone的全合成。合成的关键步骤是将醌部分连接到十二烷骨架上。用四甲氧基苄基溴15作为烷基化剂,由易得的二酮8分四步得到的烯酮11烷基化,从而以优异的产率得到加成产物16。四甲氧基苄基的存在引起外烯烃18的立体选择性氢化,导致所需异构体的比例为9∶1。用硝酸铈铵(CAN)处理化合物21可形成醌并仅一步脱保护一个甲醚即可提供所需的ilimaquinone 1。