US4026948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione
Assignee: Firmenich SA
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Filing: 1976-08-24
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Granted: 1977-05-31
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Expires: 1996-08-24
Abstract
Abstract Process for the preparation of a diketone derivative useful as perfuming and taste-modifying agent as well as intermediate for the preparation of compounds having utility in the pharmaceutical and dye-stuff industry.
Inventors
- 👤 Joseph J. Becker
- 👤 Karl-Heinrich Schulte-Elte
- 👤 Hugo Strickler
- 👤 Gunther Ohloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:01
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B; B01; B01J; B01J4/00; B01J4/001; C07C45/61; C07C45/67
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1-4-dione which comprises oxidizing, in the liquid phase, 3,3,5-trimethyl-cyclohex-4-en-1-one by means of oxygen or an oxygen containing gas mixture, in the presence of a metal catalyst essentially consisting of a member selected from the group consisting of acetate of manganese II , manganese III of a cobalt III , or an acetylacetonate of cobalt II , of chromium III , of vanadium III , of nickel II or of copper II .
Claim 2
Dependent Claim
77 words
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1-4-dione which comprises oxidizing, in the liquid phase, 3,3,5-trimethyl-cyclohex-4-en-1-one by means of oxygen or an oxygen containing gas mixture, in the presence of a metal catalyst essentially consisting of a member selected from the group consisting of acetate of manganese II , manganese III of a cobalt III , or an acetylacetonate of cobalt II , of chromium III , of vanadium III , of nickel II or of copper II .
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein the oxidation is effected at a temperature of from about 25° to 75° C.
Claim 4
Dependent Claim
13 words
A process according to claim 2 wherein the temperature is about 50° C.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |