Synthetic Optimization and Scale-Up of Imino–Amido Hafnium and Zirconium Olefin Polymerization Catalysts
作者:Chunming Zhang、Heqi Pan、Jerzy Klosin、Siyu Tu、Arvind Jaganathan、Philip P. Fontaine
DOI:10.1021/acs.oprd.5b00047
日期:2015.10.16
efficient, and scalable preparation of imino–amido Hf and Zr complexes that are precatalysts for olefin polymerizations. Facile syntheses of four imino–amido complexes were achieved in high yields by direct reactions of 4 equiv of MeMgBr with mixtures of the corresponding bisimines or imine–amines and MCl4 (M = Hf, Zr). These synthetic routes eliminate the use of the pyrophoric reagents AlMe3 and n-BuLi