申请人:Equistar Chemicals, LP
公开号:US06440889B1
公开(公告)日:2002-08-27
An amine-elimination process for making single-site catalysts is disclosed. First, an indenoindole or its synthetic equivalent reacts with a tetrakis(dialkylamino) Group 4 metal compound to give a tris(dialkyl-amino) compound. This versatile intermediate can be halogenated, alkylated, or reacted directly with cyclopentadienyl precursors to provide valuable indenoindolyl-Group 4 metal complexes. The process selectively provides mono-indenoindolyl complexes. In addition, it enables the economical preparation of desirable Cp- or Cp-like derivatives and allows the use of an inexpensive Group 4 transition metal source.
揭示了一种用于制备单位点催化剂的胺消除过程。首先,间苯并吲哚或其合成等效物与四(二烷基氨基)四族金属化合物发生反应,形成三(二烷基氨基)化合物。这种多功能的中间体可以进行卤代、烷基化,或直接与环戊二烯基前体发生反应,从而提供有价值的间苯并吲哚-四族金属配合物。该过程选择性地提供单间苯并吲哚配合物。此外,它实现了经济高效地制备理想的Cp-或类Cp衍生物,并允许使用廉价的四族过渡金属源。