作者:S. Y. Frankie Mak、Neil R. Curtis、Andrew N. Payne、Miles S. Congreve、Andrew J. Wildsmith、Craig L. Francis、John E. Davies、Sofia I. Pascu、Jonathan W. Burton、Andrew B. Holmes
DOI:10.1002/chem.200701567
日期:2008.3.17
An enantioselective synthesis of the halogenated medium-ring ether natural product (+)-obtusenyne is reported which uses the ring expansion of a seven-membered ketene acetal by means of a Claisen rearrangement to construct the core nine-membered oxygen heterocycle. The trans substituents across the ether linkage were established by using a transition-metal-catalyzed intramolecular hydrosilation reaction
据报道,对卤化的中环醚天然产物(+)-ob烯炔的对映选择性合成是通过克莱森重排利用七元乙烯酮缩醛的扩环来构建核心的九元氧杂环。通过使用环外环烯醇醚的过渡金属催化的分子内硅氢化反应,建立了跨醚键的反式取代基。另外,据报道由2-脱氧-D-核糖正式合成对-奥布他汀。突出了有关中环氧杂环的化学反应的许多有趣的观点。