US4157350A
Expired / Lapsed
US
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Process for preparing 1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-1,3-butanedione and intermediates
Assignee: International Flavors and Fragrances Inc
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Filing: 1978-03-17
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Granted: 1979-06-05
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Expires: 1998-03-17
Abstract
Abstract Described is a process for preparing an equilibrium mixture containing 1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-1,3-butanedione and its enol, which equilibrium mixture contains compounds having the structures: ##STR1## which process involves first reacting a methyl magnesium halide with 1-acetyl-2,6,6-trimethyl-1,3-cyclohexadiene to form a first organometallic compound; reacting the first organometallic compound with an acetyl halide to form a second organometallic compound, a novel intermediate; and then reacting said second organometallic compound with a hydrolyzing agent such as aqueous acid to form said equilibrium mixture.
Inventors
- 👤 Richard A. Wilson
- 👤 Braja D. Mookherjee
- 👤 William I. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0084; A; A24; A24B; A24B15/00; A24B15/18; A24B15/28; A24B15/30; A24B15/34; C07; C07C; C07C45/00; C07C45/42; C07C49/00; C07C49/527; C07C49/543; C07C49/573; C07F; C07F3/00; C07F3/003; C07F3/02; C11B; C11B9/00; C11B9/0026; C11B9/0034; C11D3/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
An organometallic compound having the structure: ##STR48## wherein X is selected from the group consisting of chloro, bromo and iodo.
Claim 2
Dependent Claim
20 words
An organometallic compound having the structure: ##STR48## wherein X is selected from the group consisting of chloro, bromo and iodo.
Claim 3
Dependent Claim
10 words
The organometallic compound of claim 1 wherein X is chloro.
References Cited (Backward Citations)
US4076853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |