Patent US3077496A successfully refreshed from Google Patents.
US3077496A
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Process for the preparation of chrysanthemumic acid
Assignee: Rhone Poulenc SA
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Filing: 1961-06-14
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Granted: 1963-02-12
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Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Julia Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:21
CPC Classifications
C; C07; C07D; C07D315/00; C07C; C07C51/00; C07C51/347; C07C51/353; C07C69/00; C07C69/74; C07C69/743; C07C69/747
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
PROCESS FOR THE PREPARATION OF (DI) TRANS CHRYSANTHEMUMIC ACID WHICH COMPRISES TREATING 4-METHYL-3-ISOBUTENYL-V-VALEROLACTONE WITH A HYDROGEN HALIDE IN A MEDIUM SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL THEREBY TO OPEN THE LACTONE RING, CYCLISING THE RESULTING ALKYL 5 - METHYL-3-(1-HALOGENOISOPROPYL)HEX-4ENOATE INTO A (DI) TRANS ALKYL CHRYSANTHEMUMATE BY TREATMENT WITH A REAGENT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL T-BUTYLATES AND T-AMYLATES, ALKALI METAL AMIDES AND ALKALI METAL HYDRIDES, AND CONVERTING THE ESTER GROUP OF THE CHRYSANTHEMUMATE INTO A CARBOXYLIC ACID GROUP BY SAPONIFICATION.
Claim 2
Dependent Claim
86 words
PROCESS FOR THE PREPARATION OF (DI) TRANS CHRYSANTHEMUMIC ACID WHICH COMPRISES TREATING 4-METHYL-3-ISOBUTENYL-V-VALEROLACTONE WITH A HYDROGEN HALIDE IN A MEDIUM SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL THEREBY TO OPEN THE LACTONE RING, CYCLISING THE RESULTING ALKYL 5 - METHYL-3-(1-HALOGENOISOPROPYL)HEX-4ENOATE INTO A (DI) TRANS ALKYL CHRYSANTHEMUMATE BY TREATMENT WITH A REAGENT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL T-BUTYLATES AND T-AMYLATES, ALKALI METAL AMIDES AND ALKALI METAL HYDRIDES, AND CONVERTING THE ESTER GROUP OF THE CHRYSANTHEMUMATE INTO A CARBOXYLIC ACID GROUP BY SAPONIFICATION.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |