[EN] PROCESS FOR THE PREPARATION OF METALLOCENE COMPLEXES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPLEXES MÉTALLOCÈNES
申请人:SAUDI BASIC IND CORP SABIC
公开号:WO2013091837A1
公开(公告)日:2013-06-27
The invention relates to a process comprising the step of reacting a 2-indenylpinacolyl borane compound with a bromosubstituted compound in the presence of a Pd catalyst and a base to form the corresponding bridged bis(indenyl) ligand. This process step is very efficient and leads to less (homocoupled) byproducts than other known processes. The process of the invention may further comprise the step of reacting a 2-bromo indene compound with pinacolborane in the presence of a Pd catalyst and a base, to form the corresponding 2-indenylpinacolylborane compound. With this, the invention provides an improved and easy two-step process to prepared bridged bis(indenyl)ligands. These bridged bis(indenyl)ligands may suitably be used in the preparation of metallocene complexes, such as 2,2'-bis(2-indenyl)biphenyl ZrCI2 and 1,2-bis(2-indenyl)benzene ZrCI2. These metallocene complexes may be used for the polymerization, optionally in the presence of a cocatalyst, of one or more a-olefins, preferably for the polymerization of ethylene. In a preferred embodiment, the Pd catalyst is preferably is(triphenylphosphin)palladium dichloride (PPh3)2PdCI2).
该发明涉及一种工艺,包括将2-茚基丙二醇硼烷化合物与溴取代化合物在Pd催化剂和碱存在下反应,形成相应的桥联双(茚基)配体的步骤。这个工艺步骤非常高效,并且产生的副产物比其他已知的工艺少(同偶联)。该发明的工艺还可以包括将2-溴茚烯化合物与丙二醇硼烷在Pd催化剂和碱存在下反应的步骤,形成相应的2-茚基丙二醇硼烷化合物。因此,该发明提供了一种改进且简便的两步法制备桥联双(茚基)配体的工艺。这些桥联双(茚基)配体可以用于制备茂金属配合物,例如2,2'-双(2-茚基)联苯基锆二氯化物和1,2-双(2-茚基)苯基锆二氯化物。这些茂金属配合物可以用于聚合一种或多种α-烯烃,最好用于乙烯的聚合,可选地在协同催化剂的存在下。在一个首选实施例中,Pd催化剂首选是二氯化二(三苯基膦)钯(PPh3)2PdCl2。