GB747942A - Phenyl dihydroxybenzoic acids - Google Patents
Phenyl dihydroxybenzoic acidsInfo
- Publication number
- GB747942A GB747942A GB17453/54A GB1745354A GB747942A GB 747942 A GB747942 A GB 747942A GB 17453/54 A GB17453/54 A GB 17453/54A GB 1745354 A GB1745354 A GB 1745354A GB 747942 A GB747942 A GB 747942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenyl
- acid
- dihydroxybenzoic
- hydroxyl
- hydroxybenzoic 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
- C07C65/00—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C65/01—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups
- C07C65/105—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups polycyclic
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises phenyl substituted dihydroxybenzoic acids in which one hydroxyl is ortho to the carboxyl group and the other hydroxyl is meta to the carboxyl group and is para to the first hydroxyl when the phenyl group is meta to the first hydroxyl, i.e. 3-phenyl-2:5-dihydroxybenzoic acid, 4-phenyl-2:5-dihydroxybenzoic acid 5 - phenyl - 2:3 - dihydroxybenzoic acid and 6-phenyl-2:5-dihydroxybenzoic acid. The compounds are made by hydrolysing the corresponding halogenated phenyl-2-hydroxybenzoic acid, suitably by heating at 50 DEG to 180 DEG C. at atmospheric or superatmospheric pressure, in an aqueous solution of alkali metal hydroxide such as sodium hydroxide. In examples the above phenyl-dihydroxy-benzoic acids are made by hydrolysis of (1) 5-bromo-3-phenyl-2-hydroxybenzoic acid; (2) 5-bromo-4-phenyl-2-hydroxybenzoic acid; (3) 3-bromo-5-phenyl-2-hydroxybenzoic acid; and (4) 5-chloro-6-phenyl-2-hydroxybenzoic acid. Halogenated phenyl - 2 - hydroxybenzoic acids used as starting materials in the above process are made by halogenating a phenyl-2-hydroxybenzoic acid in glacial acetic acid, suitably by reaction with bromine, chlorine or iodine chloride at an elevated temperature.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US747942XA | 1953-07-09 | 1953-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB747942A true GB747942A (en) | 1956-04-18 |
Family
ID=22121732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17453/54A Expired GB747942A (en) | 1953-07-09 | 1954-06-14 | Phenyl dihydroxybenzoic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB747942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099686A (en) * | 1959-03-06 | 1963-07-30 | Sinclair Research Inc | Decarboxylation of aromatic acids |
-
1954
- 1954-06-14 GB GB17453/54A patent/GB747942A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3099686A (en) * | 1959-03-06 | 1963-07-30 | Sinclair Research Inc | Decarboxylation of aromatic acids |
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