GB355597A - Manufacture of carboxylic acid derivatives of the anthraquinone series - Google Patents
Manufacture of carboxylic acid derivatives of the anthraquinone seriesInfo
- Publication number
- GB355597A GB355597A GB34073/30A GB3407330A GB355597A GB 355597 A GB355597 A GB 355597A GB 34073/30 A GB34073/30 A GB 34073/30A GB 3407330 A GB3407330 A GB 3407330A GB 355597 A GB355597 A GB 355597A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- carboxylic acid
- thiazolanthrone
- thiophenanthrone
- pyrazolanthrone
- 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
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/54—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings condensed with carbocyclic rings or ring systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Abstract
Carboxylic acids are obtained by oxidizing, in the presence of an alkaline agent, the alkyl group in an anthraquinone derivative containing an alkyl group in 2-position and a heterocyclic ring system in 1 : 9-position. The oxidation is advantageously effected by means of an aromatic nitro-compound in the presence of an oxide or hydroxide of an alkaline-earth metal, a process which may also be employed in the case of the starting materials used in the parent Specification. A catalyst, such as a copper compound, may also be present. In examples (1) pyrazolanthrone-2-carboxylic acid is obtained by oxidizing 2 - methyl - 1 : 9 - pyrazolanthrone with nitrobenzene and barium hydroxide, (2) thiazolanthrone-2-carboxylic acid is similarly obtained from 2 - methyl - 1 : 9 - thiazolanthrone, copper sulphate being employed as a catalyst, (3) by treating 2-methyl-1 : 9-thiazolanthrone with nitrobenzene and calcium hydroxide, 2 : 21-thiazolanthronylethylene is first obtained; on further oxidation in the presence of barium hydroxide the thiazolanthrone-2-carboxylic acid is obtained, and (4) 2-methyl-1 : 9-thiophenanthrone carboxylic acid is heated with nitrobenzene and soda-lime; carbon dioxide is split off and thiophenanthrone-2-carboxylic acid is obtained. 2-Methyl-N-methyl-pyrazolanthrone and 2-methyl-1 : 9-thiophenanthrone are also specified as parent materials.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE355597X | 1929-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB355597A true GB355597A (en) | 1931-08-27 |
Family
ID=6290041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34073/30A Expired GB355597A (en) | 1929-11-12 | 1930-11-12 | Manufacture of carboxylic acid derivatives of the anthraquinone series |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB355597A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7354947B2 (en) | 2001-02-15 | 2008-04-08 | Signal Pharmaceuticals, Llc | Isothiazoloanthrones, isoxazoloanthrones, isoindolanthrones and derivatives thereof a JNK inhibitors and compositions and methods related thereto |
-
1930
- 1930-11-12 GB GB34073/30A patent/GB355597A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7354947B2 (en) | 2001-02-15 | 2008-04-08 | Signal Pharmaceuticals, Llc | Isothiazoloanthrones, isoxazoloanthrones, isoindolanthrones and derivatives thereof a JNK inhibitors and compositions and methods related thereto |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB355597A (en) | Manufacture of carboxylic acid derivatives of the anthraquinone series | |
GB541782A (en) | Improvements in the manufacture of brominated aromatic carboxylic acids | |
GB1022201A (en) | A process for preparing 2,6-dichlorobenzonitrile | |
US1830838A (en) | Anthraquinone-1-carboxylic acid | |
GB186057A (en) | Manufacture of products for dyeing or printing textile fibres and other materials | |
GB365198A (en) | Process for the manufacture of barium hydroxide | |
GB156540A (en) | Manufacture of anthraquinone and its derivatives | |
GB277670A (en) | Manufacture of benzanthrone-carboxylic acids | |
GB342379A (en) | Manufacture of cyclic ketones of the acenaphthene series | |
GB928126A (en) | Process for the production of lead hydroxide oxide 5 pb0.2ho | |
GB944513A (en) | New water-insoluble dyestuffs of the phthaloylacridone series | |
GB331697A (en) | Improved process for the manufacture and production of blue vat dyestuffs | |
GB642459A (en) | Improvements in or relating to organic oxidation reactions | |
GB423446A (en) | Dyestuff intermediates of the anthraquinone series and their production | |
GB1035180A (en) | Process for the preparation of ninhydrin | |
GB764325A (en) | Compounds of the cyclopentanopolyhydrophenanthrene series and processes for preparing the same | |
GB278112A (en) | Improvements in and relating to the manufacture of dyestuffs and intermediates | |
GB691520A (en) | o-hydroxyaryl dihalotriazines | |
GB981545A (en) | Production of improved condensation products from naphthalene sulphonic acids and aldehydes | |
GB368673A (en) | Process for the manufacture of an iron compound of phaeophorbide b | |
GB774920A (en) | Improvements in the production of pure benzene carboxylic acids | |
GB266404A (en) | Improvements in vat dyestuffs | |
GB314812A (en) | ||
GB439509A (en) | Process for the manufacture of 1.4-dihalogen-anthraquinone-2-carboxylic acids | |
GB621639A (en) | Improvements in or relating to the refining of tar acids |