Effect of Substituents on the Ring-Closing Metathesis Reaction in the Synthesis of Functionalized Nonanolactones
作者:Rosario Hernández-Galán、Jacinto Ramírez-Fernández、Isidro Collado
DOI:10.1055/s-2008-1032072
日期:2008.2
The synthesis of functionalized nine-membered ring lactones based on sequential esterification and ring-closing metathesis (RCM) reactions is reported. The effects of olefin substitution and allylic and homoallylic oxygenated substituents on the RCM reaction is analyzed. An unusual cyclization stereochemistry has been observed, leading to a stereoselective olefin formation in the synthesis of nonanolactones
报道了基于顺序酯化和闭环复分解 (RCM) 反应的功能化九元环内酯的合成。分析了烯烃取代和烯丙基和高烯丙基氧化取代基对RCM反应的影响。观察到一种不寻常的环化立体化学,导致在壬内酯合成中形成立体选择性烯烃。高选择性可以通过均烯丙基或烯丙基羟基与钌金属中心在钌环丁烷中间体中的相互作用/配位来合理化。