GB697468A - Improvements relating to the production of aroxy aliphatic carboxylic acids - Google Patents
Improvements relating to the production of aroxy aliphatic carboxylic acidsInfo
- Publication number
- GB697468A GB697468A GB25377/50A GB2537750A GB697468A GB 697468 A GB697468 A GB 697468A GB 25377/50 A GB25377/50 A GB 25377/50A GB 2537750 A GB2537750 A GB 2537750A GB 697468 A GB697468 A GB 697468A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reaction
- solution
- chloro
- general formula
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
- C07C59/64—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings
- C07C59/66—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings
- C07C59/68—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings the oxygen atom of the ether group being bound to a non-condensed six-membered aromatic ring
- C07C59/70—Ethers of hydroxy-acetic acid, e.g. substitutes on the ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In a method of producing aroxyaliphatic carboxylic acids of the general formula Rn1Xn2C6H5-(n1+n2)OR1COOH, wherein R is an alkyl or aryl group or hydrogen, R1 is an alkylene residue, X is chlorine or hydrogen and n1 and n2 are integers, the sum of which is not more than 4, a phenolic compound of the general formula Rn1Xn2C6H5-(n1+n2)OH is reacted with a chloraliphiphatic carboxylic acid of the general formula ClR1COOH in an alkaline solution at a pH value which is maintained (preferably constant) within the range of 10.0 to 12.0 throughout the reaction by the addition of caustic soda solution and/or sodium carbonate solution throughout the course of the reaction, the initial concentration of the phenolic compound being at least 0.5 mols. per litre of reaction solution and the reaction being carried out at a temperature of at least 75 DEG C. Preferably the pH is kept constant during the reaction. In examples (1) 2 : 4-dichloro-phenoxy-acetic acid is prepared by adding monochloracetic acid to a solution of 2 : 4-dichloro-phenol and caustic soda at 98 DEG C., whilst keeping the pH constant at 10.5; (2) 4-chloro-2-methyl-phenoxyacetic acid is prepared similarly by reacting 4-chloro-2-methyl phenol and mono-chloro-acetic acid keeping the pH at a value of 10.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE697468X | 1949-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB697468A true GB697468A (en) | 1953-09-23 |
Family
ID=20315373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25377/50A Expired GB697468A (en) | 1949-12-19 | 1950-10-18 | Improvements relating to the production of aroxy aliphatic carboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB697468A (en) |
-
1950
- 1950-10-18 GB GB25377/50A patent/GB697468A/en not_active Expired
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