Production of isotactic and regiorandom polypropylene based polymer and block copolymers
One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF 3 SO 3 H. Condensation of the product to give ligand and metallation gives complex which catalyzes polymerization of propylene to give isotactic propylene or regiorandom propylene of low PDI or blocks thereof, depending on polymerization temperature.
1. Complex having the formula
where R 1 , R 2 , and R 4 are the same or different, and are each a hydrogen atom, a halogen atom, a fluorocarbon group, a heterocyclic compound residue, an oxygen-containing group, a nitrogen-containing group, a boron-containing group, a sulfur-containing group, a phosphorus-containing group, a carbon-containing group, or a silicon-containing group, where R 3 is a hydrogen atom, a halogen atom, a fluorocarbon group, a heterocyclic compound residue, an oxygen-containing group, a nitrogen-containing group, a boron-containing group, a sulfur-containing group, a phosphorus-containing group, or a methyl group, a silicon-containing group, and two or more of R 1 , R 2 , R 3 , and R 4 may be bonded to each other to form a ring or rings; where R 7 and R 8 are different and neither is a hydrogen, and are a halogen atom, a fluorocarbon group, a heterocyclic compound residue, an aromatic group, an oxygen-containing group, a nitrogen-containing group, a boron-containing group, a sulfur-containing group, a phosphorus-containing group, a carbon-containing group or a silicon-containing group, and they may be bonded to each other to form a ring or rings; n is an integer from 1-3; m is an integer from 0-4; M is a group 3-11 transition metal; L is a linking bridge that is a carbon-containing group, a silicon-containing group, or a boron-containing group; Y is a hydrogen atom, a halogen atom, an oxygen-containing group, a sulfur-containing group, a nitrogen-containing group, a boron-containing group, an aluminum-containing group, a phosphorus-containing group, a halogen-containing group, a heterocyclic compound residue, a carbon-containing group, a silicon-containing group, a germanium-containing group or a tin-containing group, and when m is 2, 3 or 4, plural groups Y may be the same or different and may be bonded to each other to form a ring; and the bonds between M and N and L and N are coordinative, covalent, or ionic, and the case is excluded where R 1 is sec-phenethyl, R 3 is Me, R 7 is Me, R 8 is Ph, L is derived from an α-diketone, M is Ni, n is 1, Y m is Br 2 and all stereogenic centers of the sec-phenethyl groups are of the same absolute configuration.