Patent US3923898A successfully refreshed from Google Patents.
US3923898A
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Process for the oxidation of alkyl-substittuted 2-cyclohexen-1-ones
Assignee: Firmenich SA
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Filing: 1973-11-08
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Granted: 1975-12-02
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Expires: 1993-11-08
Abstract
Abstract Process for the preparation of diketone derivatives useful as perfuming and taste-modifying agents as well as intermediates for the preparation of compounds having utility in the pharmaceutical industry.
Inventors
- 👤 Karl-Heinrich Schulte-Elte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:16
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/28; A; A23; A23L; A23L27/00; A23L27/20; A23L27/203; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/30; A24B15/34; C07C45/61; C07C45/62; C07C49/00; C07C49/385; C07C49/403; C07C49/587; C07C49/603; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/32; C11; C11B; C11B9/00; C11B9/0026; C11B9/0034
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
A PROCESS FOR THE PREPARATION OF A DIKETONE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
12 words
A PROCESS FOR THE PREPARATION OF A DIKETONE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
31 words
The process according to claim 1 wherein the oxidizing agent is selected from sodium chromate or potassium dichromate used in from about three to about 6 equivalents per equivalent of ketone.
Claim 4
Dependent Claim
48 words
The process according to claim 1 wherein the ketone compound and the oxidizing agent are contacted at a temperature comprised at between about 20* and 30*C and the mixture contains one part by weight of acetic acid for about 1 to 2 parts by weight of acetic anhydride.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |