GB385627A - The manufacture of ortho-hydroxyindolecarboxylic acids of the benzene and naphthalene series - Google Patents
The manufacture of ortho-hydroxyindolecarboxylic acids of the benzene and naphthalene seriesInfo
- Publication number
- GB385627A GB385627A GB1195731A GB1195731A GB385627A GB 385627 A GB385627 A GB 385627A GB 1195731 A GB1195731 A GB 1195731A GB 1195731 A GB1195731 A GB 1195731A GB 385627 A GB385627 A GB 385627A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acids
- hydroxy
- hydroxyindolecarboxylic
- benzene
- manufacture
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/04—Indoles; Hydrogenated indoles
- C07D209/08—Indoles; Hydrogenated indoles with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Indole Compounds (AREA)
Abstract
o-Hydroxyindolecarboxylic acids of the benzene and naphthalene series are manufactured by the action of carbon dioxide on an alkali metal salt of a hydroxyindole or on a hydroxyindole in the presence of an alkali hydroxide or carbonate. The process is carried out under pressure and heating. The products are intermediates for the manufacture of dyestuffs. The starting materials may be obtained from the sulphonic acids of indoles or naphthindoles by alkali fusion. In an example, 6-hydroxy-2 : 3-diphenylindole is converted into its potassium salt which is treated with carbon dioxide in the presence of potassium carbonate at 220 DEG C. and 60 atmospheres pressure to produce 6 - hydroxy - 2 : 3 - diphenylindole - 5 - carboxylic acid. By similar treatment, 8-hydroxy-2-phenyl- and 8-hydroxy-2 : 3-dimethyl-a -naphthindoles are converted into their respective 7-carboxylic acids. Specifications 354,392 and 385,620 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1195731A GB385627A (en) | 1931-04-22 | 1931-04-22 | The manufacture of ortho-hydroxyindolecarboxylic acids of the benzene and naphthalene series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1195731A GB385627A (en) | 1931-04-22 | 1931-04-22 | The manufacture of ortho-hydroxyindolecarboxylic acids of the benzene and naphthalene series |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB385627A true GB385627A (en) | 1932-12-22 |
Family
ID=9995753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1195731A Expired GB385627A (en) | 1931-04-22 | 1931-04-22 | The manufacture of ortho-hydroxyindolecarboxylic acids of the benzene and naphthalene series |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB385627A (en) |
-
1931
- 1931-04-22 GB GB1195731A patent/GB385627A/en not_active Expired
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