systems. We have developed a regiospecific and diastereoselective intramolecular temporary silicon-tethered rhodium-catalyzed [4+2+2] cycloisomerization reaction of a tethered enyne for the construction of tricyclic eight-membered heterocycles and carbocycles. This methodology also allows (E)- and (Z)-olefins to be utilized in a stereospecific manner. The incorporation of either alkene geometry is particularly
过渡
金属催化的碳环化反应代表了构建复杂多环系统的有力方法。我们开发了一种区域特异性和非对映选择性分子内临时
硅系
铑催化 [4+2+2] 系链烯炔环异构化反应,用于构建
三环八元杂环和碳环。这种方法还允许以立体有择的方式使用 (E)- 和 (Z)- 烯烃。任何一种烯烃几何结构的引入都特别重要,因为相关的碳环化反应在这方面通常受到限制。最后,能够利用碳连接的 1,6-烯炔并区域特异性地结合取代的 1,