Patent US3574985A successfully refreshed from Google Patents.
Patent US4265831A successfully refreshed from Google Patents.
US4265831A
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US
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Process for the preparation of hydroxyalkylperfluoroalkane sulphonamides
Assignee: Bayer AG
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Filing: 1979-07-02
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Granted: 1981-05-05
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Expires: 1999-07-02
Abstract
Abstract A process for the preparation of a hydroxyalkylperfluoroalkane sulphonamide of the formula ##STR1## wherein R F is a perfluoroalkyl group having from 1 to 20 carbon atoms; R and R' each independently is hydrogen or an alkyl, hydroxyalkyl, haloalkyl, cycloalkyl, aralkyl, alkenyl or aryl radical; and m and n each independently is an integer from 1 to about 30, comprising reacting a perfluoroalkylsulphonamide of the formula ##STR2## with an epoxide of the formula ##STR3## in the presence of a basic catalyst.
Inventors
- 👤 Karl-Heinz Mitschke
- 👤 Klaus Geisler
- 👤 Hans Niederprum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:40
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/01; C07C311/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A process for the preparation of a hydroxy-alkylperfluoroalkane sulphonamide of the formula ##STR8## wherein R F is a perfluoroalkyl group having from 1 to 20 carbon atoms; R and R' each independently is hydrogen or an alkyl, hydroxyalkyl, haloalkyl, cycloalkyl, aralkyl, alkenyl or aryl radical; and m and n each independently is an integer from 1 to about 30, comprising reacting a perfluoroalkylsulphonamide of the formula ##STR9## with an epoxide of the formula ##STR10## in the presence of a basic catalyst and in the absence of a solvent.
Claim 2
Dependent Claim
88 words
A process for the preparation of a hydroxy-alkylperfluoroalkane sulphonamide of the formula ##STR8## wherein R F is a perfluoroalkyl group having from 1 to 20 carbon atoms; R and R' each independently is hydrogen or an alkyl, hydroxyalkyl, haloalkyl, cycloalkyl, aralkyl, alkenyl or aryl radical; and m and n each independently is an integer from 1 to about 30, comprising reacting a perfluoroalkylsulphonamide of the formula ##STR9## with an epoxide of the formula ##STR10## in the presence of a basic catalyst and in the absence of a solvent.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the catalyst is potassium hydroxide and/or sodium hydroxide.
Claim 4
Dependent Claim
20 words
A process according to claim 1, including the step of washing the reaction product with water, thereby to remove impurities.
Claim 5
Dependent Claim
56 words
A process according to claim 1, wherein the basic catalyst is a member selected from the group consisting of alkali or alkaline earth metal oxides, hydroxides and hydrides, alkali metal carbonates and phosphates, metal alkyls, metal aryls, secondary metal amides, metal alcoholates, metal carboxylates, alkali metal saits of the perfluoroalkylsulphonamide, and a basic ion exchange resin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |