[EN] PROCESS FOR THE PREPARATION OF METALLOCENE COMPLEXES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE COMPLEXES MÉTALLOCÈNES
申请人:SAUDI BASIC IND CORP SABIC
公开号:WO2013091836A1
公开(公告)日:2013-06-27
The invention relates to a process comprising the step of (a) reacting a 2- indenylboranic acid (ester) with a bromosubstituted compound in the presence of the Pd catalyst bis(triphenylphosphin)palladium dichloride (PPh3)2PdCI2) and a base to form the corresponding bridged bis(indenyl) ligand. In case the 2-indenylboranic acid (ester) is the pinacolester of 2-indenylboranic acid, 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, which is commercially very attractive when the Pd catalyst bis(triphenylphosphin)palladium dichloride (PPh3)2PdCI2) is used. 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.
该发明涉及一种包括以下步骤的过程:(a)在Pd催化剂双(三苯基膦)氯化钯(PPh3)2PdCl2)和碱的存在下,将2-茚硼酸(酯)与溴取代化合物反应,形成相应的桥联双(茚)配体。如果2-茚硼酸(酯)是2-茚硼酸的缩二醇酯,该发明的过程还可以包括以下步骤:在Pd催化剂和碱的存在下,将2-溴茚烯化合物与缩二醇硼烷反应,形成相应的2-茚基缩二醇硼烷化合物。通过这种方法,该发明提供了一种改进和简便的两步法制备桥联双(茚)配体的方法,特别是当使用Pd催化剂双(三苯基膦)氯化钯(PPh3)2PdCl2)时,具有商业吸引力。桥联双(茚)配体可用于制备金属环烯配合物,如2,2'-双(2-茚基)联苯锆二氯化物和1,2-双(2-茚基)苯锆二氯化物。这些金属环烯配合物可用于聚合反应,可选地在协同催化剂的存在下,用于一个或多个α-烯烃的聚合,特别是用于乙烯的聚合。