作者:Qiang Zhu、Lixin Qiao、Yikang Wu、Yu-Lin Wu
DOI:10.1021/jo005683f
日期:2001.4.1
Synthetic studies directed toward a total synthesis of clavulactone are reported. In light of the analysis made in our previous work, cyclopentane 4a (a key intermediate in the present work) was synthesized through a radical-mediated ring closure of a rationally designed substrate 25. Using HWE reactions, the lower and upper side-chains of 4a were converted into an allyl chloride and an allyl cyanohydrin
已经报道了针对克拉维内酯的总合成的合成研究。根据我们先前的工作进行的分析,通过合理设计的底物25的自由基介导的闭环合成了环戊烷4a(当前工作的关键中间体)。使用HWE反应,将4a分别转化为烯丙基氯和烯丙基氰醇。随后用双(三甲基甲硅烷基)酰胺钠在高度稀释的THF溶液中处理烯丙基氯/氰醇,导致分子内烷基化,从而完成了合成多烯丙基骨架,十一元环的构建的主要工作。还描述了SmI(2)介导的内酯化反应,作为形成克拉维内酯的α,β-不饱和δ-内酯片段的模型反应。