US3666783A
Expired / Lapsed
US
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Process for the preparation of unsaturated organosilicon compounds
Assignee: Rhone Poulenc SA
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Filing: 1970-09-09
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Granted: 1972-05-30
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Expires: 1990-09-09
Abstract
Abstract Organosilicon compounds having at least one WHERE R1 is H or alkyl and R2 and R''1 are H or alkyl or together with the carbon atoms to which they are bonded form an aliphatic or aromatic ring of five or six ring carbon atoms are prepared by reacting WITH ZINC AND A COMPOUND CONTAINING AT LEAST ONE Si-Cl bond in the presence of a hexa-alkylphosphotriamide or an Nalkylpyrrolidone.
Inventors
- 👤 Marcel Lefort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:05
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0801; C07F7/0803; C07F7/0825; C07F7/0827
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A process according to claim 1, wherein the organosilicon compound containing the Si-C1 bond has the formula
Claim 2
Dependent Claim
62 words
A process according to claim 2, wherein the organosilicon compound containing the Si-C1 group has the formula C1m (R4)3 m -Si-Y''-Si(R4)3 m C1m wherein R4 is as defined in claim 2, m1 and m2 are each 1, 2 or 3 and one of m1 and m2 can also equal zero and Y'' represents a valency bond or a divalent radical or atom.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the reaction is carried out using zinc powder of particle size close to or less than 0.2 mm.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the reaction is carried out in hexamethylphosphotriamide or N-methylpyrrolidone.
Claim 5
Dependent Claim
23 words
A process according to claim 1, wherein at least 1 mole of hexa-alkylphosphotriamide or N-alkyl-pyrrolidone is used per gram atom of zinc employed.
Claim 6
Dependent Claim
18 words
A process according to claim 1, wherein the compound of formula I is allyl chloride or benzyl chloride.
Claim 7
Dependent Claim
25 words
A process according to claim 7, wherein the compound containing at least one SiC1 bond is chlorotrimethylsilane, dimethylvinylchlorosilane, dimethylphenylchlorosilane, methyldibutoxychlorosilane, dimethyldIchlorosilane, 1,3-dichloro-tetramethyldisiloxane trichloromethylsilane or tetrachlorosilane.
Claim 8
Dependent Claim
61 words
A process for the preparation of an organosilicon compound having at least 1 group of the formula which comprises reacting at 0*-150* C zinc, a compound of formula and an organosilicon compound of the formula (R1 4)4 n SiCln V or Clm (R4)3 m -Si-Y''-Si(R4)(3 m )Clm VII in the presence of a hexa-alkylphosphotriamide of formula or an N-alkylpyrrolidone of formula
Claim 9
Dependent Claim
58 words
A process according to claim 9 wherein the compound of formula I is allyl chloride or benzyl chloride, the compound of formula V is trimethylchlorosilane, tripropylchlorosilane, dimethylvinylchlorosilane, dimethylphenylchlorosilane, methyldiphenylchlorosilane, triphenylchlorosilane, diphenyldichlorosilane, methylvinyldichlorosilane, methyltrichlorosilane, phenyltrichlorosilane, dimethylbutoxychlorosilane or dimethylcyclohexyloxychlorosilane, the compound of formula VII is 1,2-bis(dimethylchlorosilyl)-ethane, p-bis(dimethylchlorosilyl)-benzene, 4, 4''bis(methyldichlorosilyl)-diphenyl-ether or 1,1,3,3-tetramethyl-dichlorodisiloxane, the hexa-alkylphosphotriamide is hexamethylphosphotriamide and the N-alkylpyrrolidone is N-methylpyrrolidone.
References Cited (Backward Citations)
US2403370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |