Effects of Substituents on the Multiple Bonds on Ring-Closing Metathesis of Enynes
作者:Tsuyoshi Kitamura、Yoshihiro Sato、Miwako Mori
DOI:10.1002/1615-4169(200208)344:6/7<678::aid-adsc678>3.0.co;2-p
日期:2002.8
In ring-closing metathesis (RCM) reactions of enynes, the substituents on the multiple bonds are quite important. Although RCM of an enyne having a monosubstituted alkene proceeds smoothly using the first-generation ruthenium-carbene complex 1a, that of an enyne having a disubstituted alkene and internal alkyne using 1a does not proceed. However, the second-generation ruthenium-carbene complex 1b or
在烯炔的闭环复分解(RCM)反应中,多键上的取代基非常重要。尽管使用第一代钌-卡宾配合物1a的具有单取代烯烃的烯炔的RCM顺利进行,但使用1a的具有二取代烯烃和内部炔烃的烯炔的RCM不进行。然而,发现含有 N-杂环卡宾作为配体的第二代钌-卡宾配合物 1b 或 1c 对这种烯炔非常有效,并且以高收率形成双复分解产物。