申请人:Fina Technology, Inc.
公开号:US07094938B1
公开(公告)日:2006-08-22
Methods for the preparation of fluorenyl-type ligand structures and substituted fluorenyl groups which may be employed in metallocene-type olefin polymerization catalysts. There is provided a 2,2′-dihalogen-diphenylmethylene having a methylene bridge connecting a pair of phenyl groups. Each phenyl group has a halogen on a proximal carbon atom relative to the methylene bridge. The halogenated diphenylmethylene is reacted with a coupling agent comprising a Group 2 or 12 transition metal in the presence of a nickel or palladium-based catalyst to remove the halogen atoms from the phenyl groups and couple the phenyl groups at the proximal carbon atoms to produce a fluorene ligand structure. The coupling agent may be zinc, cadmium or magnesium and the catalyst may be a monophosphene nickel complex. The halogenated diphenylmethylene may be an unsubstituted ligand structure or a monosubstituted or disubstituted ligand structure. The halogenated diphenylmethylene may be monosubstituted with a tertiary butyl group or may be a dialkyl diphenylmethylene having alkyl substituents at the directly distal positions of the phenyl groups relative to the methylene bridge.
用于制备二卤代二苯基亚甲基的方法,所述二卤代二苯基亚甲基具有连接一对苯基的亚甲基桥。每个苯基在与亚甲基桥近邻的碳原子上具有卤素。将卤代二苯基亚甲基与偶联剂反应,所述偶联剂包括第2组或第12组过渡金属,在镍或钯基催化剂的存在的条件下从苯基去除卤素原子并将苯基在近邻的碳原子上偶联以产生二苯基亚甲基桥。偶联剂可以是锌、镉或镁,催化剂可以是单磷烯镍配合物。卤代二苯基亚甲基可以是未取代的配体结构,也可以是单取代或双取代的配体结构。卤代二苯基亚甲基可以单取代叔丁基,或可以是双烷基二苯基亚甲基,在相对于亚甲基桥的苯基直接远端的位点上具有烷基取代基。