US4181666A
Expired / Lapsed
US
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Process for making furanones
Assignee: Givaudan Roure Corp
•
Filing: 1978-07-26
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Granted: 1980-01-01
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Expires: 1998-07-26
Abstract
Abstract This deals with a process for making furanones having the formula: ##STR1## wherein R represents a hydrogen atom or the methyl or ethyl group.
Inventors
- 👤 Ulrich Huber
- 👤 Hans J. Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:04
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; A; A23; A23L; A23L27/00; A23L27/20; A23L27/205; A23L27/2052; C07D307/34; C07D307/56; C07D307/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A process for the manufacture of compounds of the general formula: ##STR8## wherein R represents a hydrogen atom or the methyl or ethyl group, which process comprises subjecting a compound of the general formula: ##STR9## wherein R has the significance given earlier in this claim, to the cyanohydrin cleavage, by thermal treatment, at temperatures of about 50° C. to about 400° C., or by treatment with a base, at temperatures of about 50° C. to about 200° C., in the gas phase or in the liquid phase.
Claim 2
Dependent Claim
50 words
A process according to claim 1, wherein a compound of the formula II is prepared by oxidizing a compound of the general formuls: ##STR10## wherein R has the significance given in claim 1, in a polar solvent, at a pH of about 3-11, between about -10° C. and 60° C.
Claim 3
Dependent Claim
15 words
A process according to claim 2, wherein a caroate is used as the oxidizing agent.
Claim 4
Dependent Claim
10 words
A process according to claim 1, wherein R is methyl.
Claim 5
Dependent Claim
10 words
A process according to claim 2, wherein R is methyl.
Claim 6
Dependent Claim
10 words
A process according to claim 3, wherein R is methyl.
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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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |