An [(NHC)(NHC<sub>EWG</sub>)RuCl<sub>2</sub>(CHPh)] Complex for the Efficient Formation of Sterically Hindered Olefins by Ring-Closing Metathesis
作者:Tim Vorfalt、Steffen Leuthäußer、Herbert Plenio
DOI:10.1002/anie.200900935
日期:2009.6.29
NHC with EWGs for RCM: Ruthenium complexes with two N‐heterocyclic carbenes (NHCs), one of them substituted with electron‐withdrawing groups (EWGs), are highly efficient (pre)catalysts for the synthesis of tetrasubstituted olefins and trisubstituted olefins by ring‐closing metathesis reactions (RCM, see scheme).
用于RCM的具有EWG的NHC:具有两个N-杂环卡宾(NHC)的钌配合物(其中一个被吸电子基团(EWG)取代)是高效的(预)催化剂,可通过环戊烯合成四取代的烯烃和三取代的烯烃封闭复分解反应(RCM,请参阅方案)。