US4482729A
Expired / Lapsed
US
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Fluoroalkyl silyl ketene acetals and a process for preparing the same
Assignee: Daikin Industries Ltd
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Filing: 1984-03-04
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Granted: 1984-11-13
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Expires: 2004-03-04
Abstract
Abstract A fluoroalkyl silyl ketene acetal of the formula <IMAGE> wherein Rf is a fluoroalkyl group, and R and R' are the same or different and each is an alkyl group, which is prepared by reacting or fluorinated carboxylic acid of the formula RfCH2COOR' wherein Rf and R' are respectively the same as defined above with a silylating agent represented by a formula R3SiOTf wherein Tf represents a trifluoromethane sulfonyl group and R is the same as defined above.
Inventors
- 👤 Nobuo Ishikawa
- 👤 Takeshi Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:12
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A Fluoroalkyl silyl ketene acetal represented by a general formula ##STR23## wherein R f represents a fluoroalkyl group, and R and R' are the same or different and each represents an alkyl group.
Claim 2
Dependent Claim
33 words
A Fluoroalkyl silyl ketene acetal represented by a general formula ##STR23## wherein R f represents a fluoroalkyl group, and R and R' are the same or different and each represents an alkyl group.
Claim 3
Dependent Claim
21 words
An Acetal as claimed in claim 1 wherein said R f is a fluoroalkyl group of 1 to 10 carbon atoms.
Claim 4
Dependent Claim
28 words
An Acetal as claimed in claim 1 wherein R and R' are the same or different and each represents an alkyl group of 1 to 10 carbon atoms.
Claim 5
Dependent Claim
88 words
A process for preparing a fluoroalkyl silyl ketene acetal represented by a general formula ##STR24## wherein R f represents a fluoroalkyl group, and R and R' are the same or different and each represents an alkyl group, comprising reacting a fluorinated carboxylic acid ester represented by a formula R.sub.f CH.sub.2 COOR' wherein R f and R' are respectively the same as defined above with a silylating agent represented by a formula R.sub.3 SiOTf wherein Tf represents a trifluoromethane sulfonyl group and R is the same as defined above.
Claim 6
Dependent Claim
88 words
A process for preparing a fluoroalkyl silyl ketene acetal represented by a general formula ##STR24## wherein R f represents a fluoroalkyl group, and R and R' are the same or different and each represents an alkyl group, comprising reacting a fluorinated carboxylic acid ester represented by a formula R.sub.f CH.sub.2 COOR' wherein R f and R' are respectively the same as defined above with a silylating agent represented by a formula R.sub.3 SiOTf wherein Tf represents a trifluoromethane sulfonyl group and R is the same as defined above.
Claim 7
Dependent Claim
32 words
A process as claimed in claim 4 wherein R f is a fluoroalkyl group of 1 to 10 carbon atoms and R' is an alkyl group of 1 to 10 carbon atoms.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 4 wherein R is an alkyl group of 1 to 10 carbon atoms.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |