作者:Geir Langli、Christian Rømming、Kjell Undheim
DOI:10.1016/j.jorganchem.2005.08.049
日期:2006.1
Methodology is described for the preparation of a rigid C2-bridged zirconocene catalyst system where the C2-bridge is embedded in a spirane scaffold. The ligand was prepared from 3,4-dihydro-2H-fluoren-1(9H)-one. Initially, the oxo group was converted into a spirocyclobutanone function. Further conversion to a fulvene was followed by regio- and stereoselective saturation to provide the ligand cis-
描述了用于制备刚性C 2-桥联的锆茂催化剂体系的方法,其中C 2-桥嵌在螺烷支架中。由3,4-二氢-2 H-芴-1(9 H)-one制备配体。最初,氧代基团被转化为螺环丁酮功能。进一步转化为富勒烯,随后进行区域和立体选择性饱和,以提供配体顺式-2-(环戊二烯基)-1',2',3',4'-四氢-9 H-螺[环丁烷-1,1 ' -芴]。将配体二锂化,并用四氯化锆反应,得到相应的(η 5 -环戊二烯基) -螺[环丁烷-1,1' - (η 5-芴基)]二氯化锆配合物。通过晶体X射线分析已确定二氯化锆的结构。