New catalyst structure for olefin polymerization
A compound, cyclopentadienyl technology, applied in the field of novel catalyst structures for olefin polymerization, capable of solving unrevealed or pointed out problems
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Embodiment 1
[0058] Using the method described in WO 99 / 12981, the ligand intermediate A shown in the following formula was synthesized:
[0059]
[0060] Intermediate A
[0061] To a solution of 2,6-diacetylpyridine (1.5 g, 9.2 mmol) in absolute ethanol (50 ml) was added 2,6-diisopropylaniline (3.46 ml, 18.4 mmol) dropwise. A few drops of glacial acetic acid were added and the solution was refluxed for 48 hours. The solution was concentrated to half volume and cooled to 78°C to form Intermediate A (80%) as pale yellow crystals. Intermediate C 33 h 43 N 3 The values were calculated as follows: C 82.3%; H 8.9%; N 8.7%. Observations for the resulting intermediate were: C 81.9%; H 8.5%; N 8.7%. Fast atom bombardment mass spectrometry (FABMS) results: M+ (481). NMR analysis results are: 1 H NMR (CDCl 3 ): 8.6B7.9[m, 3H, C 5 h 3 N], 7.2B6.9[m, 6H, C 6 (CHMe 2 )H 3 ], 2.73 [sept, 4H, CHMe 2 ], 2.26 [s, 6H, C 5 h 3 N(CMeNAr) 2 ] and 1.16 [m,24H,CHM...
Embodiment 2
[0063] Weigh 250 mg, 1.09 equivalents of Intermediate A and 95 mg FeCl 2 4H 2 O into a 10ml Schlenk flask with a stir bar. The flask was placed in a Schlenk manifold, backfilled three times with argon, and 10 ml of tetrahydrofuran (THF) was added while stirring. After 2 hours, THF was removed under vacuum. The dark blue solid formed (formula below) was washed twice with ether and dried in vacuo.
[0064]
Embodiment 3
[0066] The examples show that ligands with C2 / A type symmetry are formed. The same synthesis was carried out as in Example 1, however, 2,6-diisopropylaniline was replaced by indene.
[0067] To a solution of 2,6-diacetylpyridine (9.2 mmol) in absolute ethanol (50 ml) was added 1-aminoindene (18.4 mmol). A few drops of glacial acetic acid were added and the solution was refluxed for 48 hours. The solution was concentrated to half volume, cooled to room temperature and filtered to obtain the intermediate represented by the following formula
[0068]
[0069] have C 2 / Intermediate B of class A symmetry
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