Metalations with Group 4 Alkylmetal(IV) Halides: Expeditious Route to Metallocene and Nonmetallocene Procatalysts<sup>1</sup>
作者:John J. Eisch、Fredrick A. Owuor、Peter O. Otieno
DOI:10.1021/om0104621
日期:2001.10.1
Group 4 alkylmetal(IV) halides of the type Bu2MtCl2, generated in hydrocarbon media at −78 °C by treating MtCl4 with 2 equiv of n-butyllithium, function as strong bases toward a variety of Brønsted acids, E−H, where E = cyclopentadienyl or substituted cyclopentadienyl, 1-alkynyl, indenyl, alkoxy, aryloxy, and disubstituted amino, to form metallocene and nonmetallocene procatalysts, E2MCl2, expeditiously
在−78°C的烃介质中,通过用2当量的正丁基锂处理M t Cl 4,在烃介质中生成Bu 2 M t Cl 2型的4族烷基金属(IV)卤化物,它们是形成各种布朗斯台德酸的强碱,其中E =环戊二烯基或取代的环戊二烯基,1-炔基,茚基,烷氧基,芳氧基和二取代的氨基,以快速且通常以高产率形成茂金属和非茂金属前催化剂E 2 MCl 2。