Imidazolium and Imidazolinium Salts as Carbene Precursors or Solvent for Ruthenium-Catalysed Diene and Enyne Metathesis
作者:David Sémeril、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1002/1615-4169(200208)344:6/7<585::aid-adsc585>3.0.co;2-0
日期:2002.8
dichotomous behaviour of the catalytic system generated from imidazolinium salts makes possible the preparation of cycloisomerisation products, or metathesis compounds when the reaction is carried out in the presence of acetylene. Finally, the possibility of performing ring-closing metathesis in imidazolium salts as an ionic solvent with an ionic catalyst of the type [(p-cymene)RuCl(PCy3)CCCPh2][X] is demonstrated
这篇综述报告了利用钌、1,3-二氨基卡宾的前体和碱原位制备的催化体系来进行烯炔闭环复分解。甲硅烷基化的烯炔和烯丙基炔丙基醚在[(对甲基异丙基苯)RuCl2]2、氯化咪唑或咪唑啉和碳酸铯的存在下被重排成具有共轭二烯结构的环状衍生物。当反应在乙炔存在下进行时,从 1,6-二烯开始,由咪唑啉盐产生的催化体系的二分行为使得制备环异构化产物或复分解化合物成为可能。最后,证明了在作为离子溶剂的咪唑盐中使用 [(p-伞花烃)RuCl(PCy3)CCCPh2][X] 类型的离子催化剂进行闭环复分解的可能性。