Control of the Regio- and Diastereoselectivity for the Preparation of Highly Functionalized Terpenic Cyclopentanes through Radical Cyclization
作者:Jesús F. Arteaga、Horacio R. Diéguez、José A. González-Delgado、José F. Quílez del Moral、Alejandro F. Barrero
DOI:10.1002/ejoc.201100400
日期:2011.9
The titanocene-mediated cyclization of suitably functionalized acyclic C10 epoxy-polyprenes leads, with moderate stereoselectivity, to high yields of functionalized terpenic cyclopentanes with three contiguous stereogenic centers. These highly functionalized cyclopentanes are useful intermediates for the synthesis of several natural compounds that include this interesting subunit in their structure
适当官能化的无环 C10 环氧-聚戊二烯的二茂钛介导的环化以中等立体选择性导致具有三个连续立体中心的官能化萜烯环戊烷的高产率。这些高度官能化的环戊烷是合成几种天然化合物的有用中间体,这些天然化合物的结构中包含这种有趣的亚基。生成环戊烷的过程的区域选择性和环化的立体选择性都可以通过使用丙二酰衍生物或 α,β-不饱和腈作为自由基受体来控制。