US3980708A
Expired / Lapsed
US
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Process for preparing alpha-substituted acetaldehydes
Assignee: International Flavors and Fragrances Inc
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Filing: 1975-07-08
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Granted: 1976-09-14
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Expires: 1995-07-08
Abstract
Abstract Process described is for the preparation of 2,2,6-trimethyl-1-cyclohexen-1-ylacetaldehyde having the structure: ##SPC1## (hereinafter referred to as beta-cyclohomocitral) which comprises the step of oxidizing beta-ionone with hydrogen peroxide in the presence of inorganic base to form beta-cyclo-homocitral, directly.
Inventors
- 👤 Alan Owen Pittet
- 👤 Erich Manfred Klaiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0084; A; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/30; A24B15/34; C11B; C11B9/00; C11B9/0026; C11B9/0034
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A process for preparing 2,2,6-trimethyl-1-cyclohexen-1-ylacetaldehyde consisting essentially of the step of intimately admixing hydrogen peroxide, an inorganic base and beta-ionone, said hydrogen peroxide being in the form of from 10 up to 50% aqueous hydrogen peroxide; said inorganic base being selected from the group consisting of alkali metal hydroxides and alkali metal carbonates; and the mole ratio of hydrogen peroxide:beta ionone being from about 1.1:1 up to about 3:1.
Claim 2
Dependent Claim
69 words
A process for preparing 2,2,6-trimethyl-1-cyclohexen-1-ylacetaldehyde consisting essentially of the step of intimately admixing hydrogen peroxide, an inorganic base and beta-ionone, said hydrogen peroxide being in the form of from 10 up to 50% aqueous hydrogen peroxide; said inorganic base being selected from the group consisting of alkali metal hydroxides and alkali metal carbonates; and the mole ratio of hydrogen peroxide:beta ionone being from about 1.1:1 up to about 3:1.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the hydrogen peroxide is in the form of 30% aqueous hydrogen peroxide.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the inorganic base is aqueous sodium hydroxide.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the reaction is carried out in the presence of methyl alcohol.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |