Bridged bi-aromatic ligands and olefin polymerization catalysts prepared therefrom
Disclosed are novel bridged bi-aromatic phenol ligands and transition metal catalyst compounds derived therefrom. Also disclosed are methods of making the ligands and transition metal compounds, and polymerization processes utilizing the transition metal compounds for the production of olefin polymers.
1. A bridged bi-aromatic phenol ligand of formula (I);
wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 is independently selected from the group consisting of hydride, halide, optionally substituted hydrocarbyl, heteroatom-containing optionally substituted hydrocarbyl, alkoxy, aryloxy, silyl, boryl, dialkyl amino, alkylthio, arylthio and seleno; optionally two or more R groups can combine together into ring structures with such ring structures having from 3 to 100 non-hydrogen atoms in the ring; A is an optionally substituted divalent alkyl, alkenyl, alkynyl, heteroalkyl, heteroalkenyl, heteroalkynyl, carbocycle, heterocarbocycle, aryl, heteroaryl, or silyl; Y and Y′ are independently selected from O, S, NR a and PR a wherein R a is optionally substituted hydrocarbyl; Ar is, independently, optionally substituted aryl or optionally substituted heteroaryl.
2. A bridged bi-aromatic phenol ligand according to claim 1 of formula (II):
wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 is independently selected from the group consisting of hydride, halide, optionally substituted hydrocarbyl, heteroatom-containing optionally substituted hydrocarbyl, alkoxy, aryloxy, silyl, boryl, dialkyl amino, alkylthio, arylthio and seleno; optionally two or more R groups can combine together into ring structures with such ring structures having from 3 to 100 non-hydrogen atoms in the ring; A is an optionally substituted divalent alkyl, alkenyl, alkynyl, heteroalkyl, heteroalkenyl, heteroalkynyl, carbocycle, heterocarbocycle, aryl, heteroaryl, or silyl; Ar is, independently, optionally substituted aryl or optionally substituted heteroaryl.
3. A bridged bi-aromatic phenol ligand according to claim 1 wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 are independently selected from the group consisting of hydride, halide, and optionally substituted alkyl, heteroalkyl, aryl, heteroaryl, alkoxyl, aryloxyl, silyl, boryl, dialkylamino, alkylthio, arylthio, and seleno.
4. A bridged bi-aromatic phenol ligand according to claim 1 wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 are independently selected from the group consisting of hydride, halide, and optionally substituted alkyl, heteroalkyl, aryl, heteroaryl, alkoxyl, and aryloxyl.
5. A bridged bi-aromatic phenol ligand according to claim 1 wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 are independently selected from the group consisting of hydride, and optionally substituted alkyl, heteroalkyl, aryl, and heteroaryl.
6. A bridged bi-aromatic phenol ligand according to claim 1 wherein the bridging group A is selected from the group consisting of optionally substituted divalent hydrocarbyl and divalent heteroatom containing hydrocarbyl.
7. A bridged bi-aromatic phenol ligand according to claim 1 wherein the bridging group A is selected from the group consisting of optionally substituted divalent alkyl, alkenyl, alkynyl, heteroalkyl, heteroalkenyl, heteroalkynyl, aryl, heteroaryl and silyl.
8. A bridged bi-aromatic phenol ligand according to claim 1 wherein the bridging group A is represented by the general formula —(QR 13 2-z″ ) z′ — wherein each Q is either carbon or silicon and each R 13 may be the same or different from the others such that each R 13 is selected from the group consisting of hydride and optionally substituted hydrocarbyl and heteroatom containing hydrocarbyl, and optionally two or more R 13 groups may be joined into a ring structure having from 3 to 50 atoms in the ring structure not counting hydrogen atoms; z′ is an integer from 1 to 10; and z″ is 0, 1 or 2.
9. A bridged bi-aromatic phenol ligand according to claim 1 wherein Ar is, independently, an optionally substituted aryl or heteroaryl.
10. A bridged bi-aromatic phenol ligand according to claim 1 wherein Ar is, independently, an optionally substituted phenyl, naphthyl, biphenyl, anthracenyl or phenanthrenyl.
11. A bridged bi-aromatic phenol ligand according to claim 1 wherein Ar is, independently, an optionally substituted thiophene, pyridine, isoxazole, pyrazole, pyrrole, furan, or benzo-fused analogues of these rings.
12. A bridged bi-aromatic phenol ligand according to claim 1 wherein each occurrence of Ar is the same.
13. A method of preparing a bridged bi-aromatic phenol ligand according to claim 1 comprising the steps of:
a) treating a bridged bi-aromatic phenol of formula (III) with a source of halogen to yield a tetrahalo bridged bi-aromatic phenol of formula (IV); and
b) treating the tetrahalo bridged bi-aromatic phenol of formula (IV) with an aryl-boron compound (ArBR b 2 or ArBF 3 − M + ) in the presence of a catalyst, to yield the bridged bi-aromatic phenol ligand of formula (I);
wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 is independently selected from the group consisting of hydride, halide, optionally substituted hydrocarbyl, heteroatom-containing optionally substituted hydrocarbyl, alkoxy, aryloxy, silyl, boryl, dialkyl amino, alkylthio, arylthio and seleno; optionally two or more R groups can combine together into ring structures with such ring structures having from 3 to 100 non-hydrogen atoms in the ring; A is an optionally substituted divalent alkyl, alkenyl, alkynyl, heteroalkyl, heteroalkenyl, heteroalkynyl, carbocycle, heterocarbocycle, aryl, heteroaryl, or silyl; Y and Y′ are independently selected from O, S, NR a and PR a wherein R a is optionally substituted hydrocarbyl; Ar is, independently, optionally substituted aryl or optionally substituted heteroaryl; X is halo; R b is independently selected from hydride, alkyl, hydroxy and alkoxy, wherein when both of R b are alkoxy, optionally they may combine to form a ring structure of formula BO 2 R b 2 , and wherein M + is an alkali metal cation.
14. A method according to claim 13 wherein the catalyst comprises palladium or nickel.
15. A method according to claim 14 wherein the palladium catalyst is a palladium phosphine catalyst.
16. A method according to claim 13 wherein the catalyst further comprises a base.
17. A method according to claim 16 wherein the base is an alkali metal carbonate or alkali metal phosphate.
18. A method according to claim 13 wherein X is bromo or chloro.
19. A method according to claim 13 wherein the aryl-boron compound is an optionally substituted aryl boronic acid, an optionally substituted heteroaryl boronic acid, an optionally substituted aryl boronic ester, an optionally substituted heteroaryl boronic ester, an optionally substituted aryl trifluoroborate, an optionally substituted heteroaryl trifluoroborate, an optionally substituted aryl borane or an optionally substituted heteroaryl borane.
20. A transition metal compound comprising a ligand according to claim 1 .