US6440889B1
Expired / Lapsed
US
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Amine elimination process for making single-site catalysts
Assignee: Equistar Chemicals LP
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Filing: 2001-08-15
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Granted: 2002-08-27
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Expires: 2021-08-15
Abstract
Abstract An amine-elimination process for making single-site catalysts is disclosed. First, an indenoindole or its synthetic equivalent reacts with a tetrakis(dialkylamino) Group 4 metal compound to give a tris(dialkyl-amino) compound. This versatile intermediate can be halogenated, alkylated, or reacted directly with cyclopentadienyl precursors to provide valuable indenoindolyl-Group 4 metal complexes. The process selectively provides mono-indenoindolyl complexes. In addition, it enables the economical preparation of desirable Cp- or Cp-like derivatives and allows the use of an inexpensive Group 4 transition metal source.
Inventors
- 👤 Barbara M. Tsuie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
C; C07; C07F; C07F17/00; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/94; C08; C08F; C08F10/00; B01J2531/00; B01J2531/40; B01J2531/48; C08F2420/00; C08F2420/05; C08F2420/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
46 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with an excess of a halogenating agent to produce an indenoindolyl Group 4 metal trihalide.
Claim 2
Dependent Claim
46 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with an excess of a halogenating agent to produce an indenoindolyl Group 4 metal trihalide.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein the indenoindolyl Group 4 metal trihalide is further reacted with about one equivalent of a cyclopentadienyl anion to produce a cyclopentadienyl(indenoindolyl) Group 4 metal dihalide.
Claim 4
Dependent Claim
46 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent, with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with an excess of an alkylating agent to produce an indenoindolyl Group 4 metal trialkyl.
Claim 5
Dependent Claim
46 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent, with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with an excess of an alkylating agent to produce an indenoindolyl Group 4 metal trialkyl.
Claim 6
Dependent Claim
49 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent, with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with about one equivalent of a cyclopentadiene compound to produce a cyclopentadienyl (indenoindolyl) Group 4 metal bis(dialkylamino) compound.
Claim 7
Dependent Claim
49 words
A process which comprises: (a) reacting an indenoindole or its synthetic equivalent, with about one equivalent of a tetrakis(dialkylamino) Group 4 metal compound; and (b) reacting the product from step (a) with about one equivalent of a cyclopentadiene compound to produce a cyclopentadienyl (indenoindolyl) Group 4 metal bis(dialkylamino) compound.
Claim 8
Dependent Claim
30 words
The process of claim 4 wherein the product from step (b) is further reacted with an excess of a halogenating agent to produce a cyclopentadienyl (indenoindolyl) Group 4 metal dihalide.
Claim 9
Dependent Claim
30 words
The process of claim 4 wherein the product from step (b) is further reacted with an excess of an alkylating agent to produce a cyclopentadienyl (indenoindolyl) Group 4 metal dialkyl.
References Cited (Backward Citations)
US6232260B1
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2005-08-26 | 2006-02-25 | 2006-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-08-26 | 2010-02-25 | 2010-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-08-26 | 2014-02-25 | 2014-08-27 | $7700.00 | Window Closed / Lapsed |