A ring-closing metathesis approach to the bicyclo[4.3.1]decane core of caryolanes
作者:William P.D. Goldring、Warren T. Paden
DOI:10.1016/j.tetlet.2010.11.138
日期:2011.2
A synthesis of highly substituted and sterically congested bicyclo[4.3.1]decenes, a structure embedded in the core 4,7,6-tricyclic system of natural caryolanes, was successfully achieved via a ring-closing metathesis (RCM) reaction of syn-1,3-diene substituted cyclohexanols. The construction of the diene substrates, starting from 4-acetoxy-3-methyl-2-cyclohexen-1-one, employed diastereoselective copper-mediated
高度取代的和位拥塞双环[4.3.1]癸烯,嵌入在芯天然caryolanes的4,7,6-三环系统的结构,的合成通过闭环复分解(RCM)的反应成功地实现顺- 1,3-二烯取代的环己醇。从4-乙酰氧基-3-甲基-2-环己烯-1-酮开始的二烯底物的构建采用非对映选择性铜介导的共轭加成和格氏反应。关键合成中间体的X射线晶体结构测定证实了RCM双环产物的相对立体化学。