Total Synthesis of Potent Antitumor Macrolide (-)-Zampanolide: An Oxidative Intramolecular Cyclization-Based Strategy
作者:Arun K. Ghosh、Xu Cheng、Ruoli Bai、Ernest Hamel
DOI:10.1002/ejoc.201200286
日期:2012.8
enantioselective total synthesis of (-)-zampanolide, a macrolide marine natural product with high anti-cancer activity is described. For synthesis of the 4-methylene tetrahydropyran unit of (-)-zampanolide, initially, we relied upon an oxidative C-H activation of an alkenyl ether and intramolecular cyclization to provide the substituted tetrahydropyran ring. However, this strategy was unsuccessful
详细描述了 (-)-zampanolide 的对映选择性全合成,这是一种具有高抗癌活性的大环内酯海洋天然产物。为了合成 (-)-zampanolide 的 4-亚甲基四氢吡喃单元,最初,我们依靠烯基醚的氧化 CH 活化和分子内环化来提供取代的四氢吡喃环。然而,这个策略并没有成功。随后,我们发现肉桂基醚对于成功的氧化分子内环化反应至关重要。该合成还具有交叉复分解反应以构建三取代烯烃,闭环复分解以形成高度官能化的大环内酯和手性磷酸促进 N-酰基氨基形成以立体选择性地提供 (-)-zampanolide 且收率良好.