Patent US3974202A successfully refreshed from Google Patents.
US3974202A
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Method of preparing arylacetic acid alkyl esters
Assignee: Dynamit Nobel AG
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Filing: 1973-08-10
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Granted: 1976-08-10
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Expires: 1993-08-10
Abstract
Abstract In a process of producing an alkyl ester of a substituted or unsubstituted arylacetic acid wherein a substituted or unsubstituted aromatic halogen methyl compound is reacted with carbon monoxide and an alcohol having an alkoxy group the same as that of said ester, the improvement which comprises carrying out said reaction in a basic reaction medium in the presence as catalyst of:
Inventors
- 👤 Moustafa El-Chahawi
- 👤 Hermann Richtzenhain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:40
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/36; C07C69/00; C07C69/612; C07C69/614
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
In a process of producing an alkyl ester of a substituted or unsubstituted arylacetic acid wherein a correspondingly substituted or unsubstituted benzyl halide is reacted with carbon monoxide and an alcohol having an alkoxy group the same as that of said ester, the improvement which comprises carrying out said reaction in a basic reaction medium at a temperature of about 10°-100°C, and a carbon monoxide pressure of about 0.1-25 atmospheres in the presence as catalyst of which is at least one of Co 2 (CO) 8 and Fe(CO) 5 .
Claim 2
Dependent Claim
90 words
In a process of producing an alkyl ester of a substituted or unsubstituted arylacetic acid wherein a correspondingly substituted or unsubstituted benzyl halide is reacted with carbon monoxide and an alcohol having an alkoxy group the same as that of said ester, the improvement which comprises carrying out said reaction in a basic reaction medium at a temperature of about 10°-100°C, and a carbon monoxide pressure of about 0.1-25 atmospheres in the presence as catalyst of which is at least one of Co 2 (CO) 8 and Fe(CO) 5 .
Claim 3
Dependent Claim
15 words
Process according to claim 1, wherein carbon monoxide is added in admixture with another gas.
Claim 4
Dependent Claim
15 words
Process according to claim 1, the metal carbonyl compound being Co 2 (CO) 8 .
Claim 5
Dependent Claim
13 words
Process according to claim 1, the metal carbonyl compound being Fe(CO) 5 .
Claim 6
Dependent Claim
12 words
Process according to claim 1, wherein the benzyl halide is benzyl chloride.
Claim 7
Dependent Claim
32 words
Process according to claim 1, wherein the benzylhalide is unsubstituted or substituted by chlorine, alkyl of 1-6 carbon atoms or alkoxy of 1 to 6 carbon atoms; or condensed with another ring.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |