利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN104093730A 用于制备茂金属络合物的方法 无效 - 驳回

用于制备茂金属络合物的方法
摘要：
本发明涉及一种方法，其包含以下步骤：(a)在Pd催化剂双(三苯基膦)二氯化钯(PPh3)2PdCl2)和碱的存在下使2-茚基硼酸(酯)与溴取代化合物反应以形成相应桥联双(茚基)配体。在2-茚基硼酸(酯)为2-茚基硼酸的频哪醇酯的情况下，本发明的方法还可以包含以下步骤：在Pd催化剂和碱的存在下使2-溴茚化合物与频哪醇硼烷反应，以形成相应2-茚基频哪基硼烷化合物。在此情况下，本发明提供一种制备桥联双(茚基)配体的改善的和容易的两步骤方法，其在使用Pd催化剂双(三苯基膦)二氯化钯(PPh3)2PdCl2)时在商业上极有吸引力。桥联双(茚基)配体可以适合用于茂金属络合物例如2,2'-双(2-茚基)联苯ZrCl2和1,2-双(2-茚基)苯ZrCl2的制备。这些茂金属络合物可以用于任选地在助催化剂的存在下聚合一种或多种α-烯烃、优选用于聚合乙烯。
摘要（英）：

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.

0/0