作者:Michèle Gerster、Philippe Renaud
DOI:10.1055/s-1997-1346
日期:1997.11
The stereochemical outcome of reactions mediated by tertiary 1,3-dioxolan-4-yl and oxiranyl cyclic radicals has been investigated. The presence of a very bulky substituent next to the radical center has a remarkable syn directing effect. These stereoselectivities are rationalized by a model which takes into account radical pyramidalization, steric interactions between the substituents attached to the cycle and steric interactions with the incoming radical trap.
我们研究了由 1,3-二氧戊环-4-基和环氧乙烷环自由基介导的反应的立体化学结果。在自由基中心旁边存在一个非常笨重的取代基具有显著的同步引导作用。这些立体选择性通过一个模型得到了合理解释,该模型考虑到了自由基的金字塔化、连接到循环上的取代基之间的立体相互作用以及与进入的自由基陷阱之间的立体相互作用。