US4777278A
Expired / Lapsed
US
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Synthesis of alkyl cycloalkyl dialkoxysilanes
Assignee: Akzo America Inc
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Filing: 1987-10-08
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Granted: 1988-10-11
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Expires: 2007-10-08
Abstract
Abstract Alkyl cycloalkyl dialkoxysilanes (e.g., methyl cyclohexyl dimethoxysilane) can be prepared by reaction of an alkyl trialkoxysilane (e.g., methyl trimethoxysilane) with a Grignard reagent containing the cycloalkyl moiety derived in the final end-product (e.g., a reagent formed by reacting cyclohexyl chloride and magnesium metal). The reaction is run in the absence of ether solvent, the Grignard reagent is preferably formed in situ by the reaction of magnesium metal and cyclohexyl halide, and agitation is used to promote the reaction. Advantageously, a catalyst, such as iodine, is used to promote the reaction.
Inventors
- 👤 Elliot I. Band
- 👤 Suzanne T. Eberhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:33
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1876
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
A method of forming an alkyl cycloalkyl dialkoxysilane by reacting, with agitation, an alkyl trialkoxysilane with a Grignard reagent which contains a cycloalkyl group which is to be substituted for one of the alkoxy groups of the alkyl trialkoxysilane in the absence of an ether solvent.
Claim 2
Independent Claim
46 words
A method of forming an alkyl cycloalkyl dialkoxysilane by reacting, with agitation, an alkyl trialkoxysilane with a Grignard reagent which contains a cycloalkyl group which is to be substituted for one of the alkoxy groups of the alkyl trialkoxysilane in the absence of an ether solvent.
Claim 3
Dependent Claim
22 words
A method as claimed in claim 1 wherein the cycloalkyl group is cyclohexyl and the alkoxy and alkyl groups are lower alkyl.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 2 wherein the alkoxy and alkyl groups are methoxy and methyl, respectively.
Claim 5
Dependent Claim
14 words
A method as claimed in claim 3 wherein the reaction is catalyzed by iodine.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 4 wherein the reaction is conducted in a hydrocarbon solvent.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1 wherein the Grignard reagent is formed in situ by reaction of a cycloalkylhalide and magnesium.
Claim 8
Dependent Claim
22 words
A method as claimed in claim 3 wherein the Grignard reagent is formed in situ by reaction of a cycloalkylhalide and magnesium.
Claim 9
Dependent Claim
22 words
A method as claimed in claim 4 wherein the Grignard reagent is formed in situ by reaction of a cycloalkylhalide and magnesium.
Claim 10
Dependent Claim
16 words
A method as claimed in claim 1 which is conducted in the substantial absence of solvent.
Claim 11
Dependent Claim
16 words
A method as claimed in claim 2 which is conducted in the substantial absence of solvent.
Claim 12
Dependent Claim
16 words
A method as claimed in claim 7 which is conducted in the substantial absence of solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |