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US5254707A
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Preparation of cyclopentadiene derivatives
Assignee: Albemarle Corp
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Filing: 1992-12-07
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Granted: 1993-10-19
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Expires: 2012-12-07
Abstract
Abstract The process for preparing a compound of the formula: Cp'YNHR wherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C 1 to C 20 hydrocarbyl or substituted hydrocarbyl group, the process comprising reacting a ligand of the formula Cp'YX, wherein Cp' and Y are as defined above and X is halogen, with a substantially equimolar amount of a primary amine of the formula NH 2 R, wherein R is as defined above, in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35° C., so as to form said compound.
Inventors
- 👤 Jamie R. Strickler
- 👤 John M. Power
- 👤 Meng-Sheng Ao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:31
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/08; C07F17/00; C07C2601/00; C07C2601/06; C07C2601/10; C07C2601/18; C07C2601/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A process for preparing a compound of the formula: Cp'YNHR wherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C 1 to C 20 hydrocarbyl or substituted hydrocarbyl group; said process comprising reacting a ligand of the formula: Cp'YX wherein Cp' and Y are as defined above and X is halogen; with from about 0.9 to 1.1 mol per mole of said ligand of a primary amine of the formula: NH.sub.2 wherein R is as defined above; in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35° C. so as to form said compound.
Claim 2
Dependent Claim
123 words
A process for preparing a compound of the formula: Cp'YNHR wherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C 1 to C 20 hydrocarbyl or substituted hydrocarbyl group; said process comprising reacting a ligand of the formula: Cp'YX wherein Cp' and Y are as defined above and X is halogen; with from about 0.9 to 1.1 mol per mole of said ligand of a primary amine of the formula: NH.sub.2 wherein R is as defined above; in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35° C. so as to form said compound.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein said HX scavenger is a tertiary amine which is present in an amount of from about 1.1 to 25 moles per mole of ligand.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein R is a C 5 to C 20 hydrocarbyl or substituted hydrocarbyl group.
Claim 5
Dependent Claim
16 words
The process of claim 2 wherein R is a C 10 to C 20 hydrocarbyl group.
Claim 6
Dependent Claim
15 words
The process of claim 2 wherein said temperature is from about 40° to 100° C.
Claim 7
Dependent Claim
14 words
The process of claim 2 wherein said temperature om about 50° to 70° C.
Claim 8
Dependent Claim
9 words
The process of claim 1 wherein X is chloride.
Claim 9
Dependent Claim
9 words
The process of claim 2 wherein X is chloride.
Claim 10
Dependent Claim
29 words
The process of claim 2 wherein said solvent is present in an amount of from about 50 to 90 weight percent based on the total weight of reaction mixture.
Claim 11
Dependent Claim
32 words
The process of claim 2 wherein R is a C 10 to C 20 hydrocarbyl or substituted hydrocarbyl group, said temperature is from about 4° to 100° C., and X is chloride.
Claim 12
Dependent Claim
15 words
The process of claim 10 wherein said temperature if from about 50° to 70° C.
Claim 13
Dependent Claim
33 words
The process of claim 2 wherein CpYX is C 5 Me 4 H)SiMe 2 Cl, NH 2 R is cyclododecylamine, and said product is C 5 MeH)SiMe 2 (NHC 12 H 23 ).
Claim 14
Dependent Claim
10 words
The process of claim 12 wherein said scavenger is triethylamine.
References Cited (Backward Citations)
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