Bridged metallocene complex for olefin polymerization

A process for the preparation of the metallocene complex according to formula 5

• comprising:
• a) reacting 2-bromophenyl boronic acid with 1,8-diaminonaphthalene to form a protected compound according to formula 13,
• b) reacting the protected compound (13) with a compound according to formula 14,
• in the presence of a Pd catalyst and in the presence of a base to form a protected compound according to formula 15,
• c) deprotecting the protected compound (15) by reaction with an acid to provide the compound according to formula 16,
• reacting the compound (16) with an N-substituted 2-bromoaniline in the presence of a Pd catalyst and in the presence of a base, to form a ligand precursor according to formula 11, wherein the N-substituted 2-bromoaniline is substituted with hydrogen or a hydrocarbon radical with 1-20 carbon atoms,
• d) creating an anion of the ligand precursor (11) with an organic or inorganic base,
• e) reacting the anion of the ligand precursor with (Me2N)aMQk, wherein Me is methyl;
• M is a lanthanide metal or a transition metal of group 3, 4, 5 or 6 of the Periodic System of the Elements;
• Q is an anionic ligand to M;
• k is the number of Q groups and equals the valence of M minus 2;
• and a equals the valence of M minus k, to yield a metallocene complex according to formula 5.