US3946078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloaliphatic unsaturated ketones as odour- and taste-modifying agents
Assignee: Firmenich SA
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Filing: 1974-04-29
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Granted: 1976-03-23
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Expires: 1994-04-29
Abstract
Abstract Process for the preparation of unsaturated cycloaliphatic ketones useful as perfuming and odour-modifying agents in the manufacture of perfumes and perfumed products, and as flavouring and taste-modifying agents in the aromatization of foodstuffs in general and imitation flavours for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products. Compositions of matter relating to some of said unsaturated cycloaliphatic ketones which are new, and perfume- and flavouring compositions containing same.
Inventors
- 👤 Valentin Rautenstrauch
- 👤 Ferdinand Naf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:13
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0026; C11B9/0034; A; A23; A23L; A23L27/00; A23L27/20; A23L27/203; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/14; C07C403/16; C07C45/00; C07C45/27; C07D; C07D307/00; C07D307/94; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
Process for the preparation of compounds of the formula ##SPC14## containing an isolated double bond in position 1 or two conjugated double bonds in position 1 and 3, the double bonds being represented by the dotted lines, and wherein the substituents R 1 and R 2 may be the same or different and each represents a hydrogen atom or a lower alkyl radical containing from 1 to 6 carbon atoms, which comprises treating a diol having the formula ##SPC15## comprising a saturated or mono-unsaturated six membered ring, the double bond being indicated by the dotted line and wherein R 1 and R 2 have the meaning indicated above, with phosphoric acid, sulphuric acid, trifluoroacetic acid, p-toluene sulphonic acid, acid diatomaceous earths or an acidic cation exchange resin.
Claim 2
Dependent Claim
127 words
Process for the preparation of compounds of the formula ##SPC14## containing an isolated double bond in position 1 or two conjugated double bonds in position 1 and 3, the double bonds being represented by the dotted lines, and wherein the substituents R 1 and R 2 may be the same or different and each represents a hydrogen atom or a lower alkyl radical containing from 1 to 6 carbon atoms, which comprises treating a diol having the formula ##SPC15## comprising a saturated or mono-unsaturated six membered ring, the double bond being indicated by the dotted line and wherein R 1 and R 2 have the meaning indicated above, with phosphoric acid, sulphuric acid, trifluoroacetic acid, p-toluene sulphonic acid, acid diatomaceous earths or an acidic cation exchange resin.
Claim 3
Dependent Claim
15 words
Process according to claim 1 in which the diol is treated with diluted sulphuric acid.
Claim 4
Dependent Claim
28 words
Process according to claim 1 wherein the reaction between the diol and the acid is carried out in the presence of a salt of copper nickel or mercury.
Claim 5
Dependent Claim
20 words
Process according to claim 1 where the reaction is carried out at a temperature of between about 40° and 90°C.
References Cited (Backward Citations)
DE2022216A1
Cited
US3822315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |