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US3931327A
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Process for the preparation of a diketone derivative
Assignee: Firmenich SA
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Filing: 1974-12-03
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Granted: 1976-01-06
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Expires: 1994-12-03
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
- 👤 Hugo Strickler
- 👤 Joseph J. Becker
- 👤 Gunther Ohloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/587; C07C49/757; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/78; C07C45/81; C07C45/82
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
35 words
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione, which comprises oxidizing, in the gas phase, 3,3,5-trimethyl-cyclohex-5-en-1-one in the presence of vanadium oxide or a mixture of vanadium oxides deposited on an inert solid support by means of
Claim 2
Dependent Claim
35 words
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione, which comprises oxidizing, in the gas phase, 3,3,5-trimethyl-cyclohex-5-en-1-one in the presence of vanadium oxide or a mixture of vanadium oxides deposited on an inert solid support by means of
Claim 3
Dependent Claim
24 words
Process according to claim 1, wherein the oxidation is performed by means of an oxygen containing gas mixture comprising of from about 20 to
Claim 4
Dependent Claim
11 words
Process according to claim 2, wherein the oxygen containing gas mixture
Claim 5
Dependent Claim
22 words
Process according to claim 1, wherein the oxidation is effected at barometric pressure and at a temperature of from about 180° to
Claim 6
Dependent Claim
12 words
Process according to claim 4, wherein the oxidation is effected at a
Claim 7
Dependent Claim
12 words
Process according to claim 1, wherein the inert solid support is porous
Claim 8
Dependent Claim
55 words
Process according to claim 1, wherein the oxidation is performed in the presence of vanadium oxide, or a mixture of vanadium oxides, deposited at a concentration of from about 5 to 25 percent by weight of V 2 O 5 on porous silica containing of from about 0.1 to 3 percent by weight of an
Claim 9
Dependent Claim
37 words
Process according to claim 7, wherein the concentration of vanadium oxide, or mixture of vanadium oxides, is of about 15 percent by weight of V 2 O 5 deposited on porous silica containing about 1 percent by
Claim 10
Dependent Claim
29 words
Process according to claim 1, wherein the vanadium oxide catalyst is preliminarily activated by heating under a stream of air at a temperature of from about 200° to 400°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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |