http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-934428-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C243-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C243-38 |
| filingDate | 1961-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1963-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-934428-A |
| abstract | The invention comprises b -acyl hydrazinonaphthalenes and the method of producing them by reacting a hydroxynaphthalene or an amino-naphthalene with a monoacyl hydrazine in a diluent and in the presence of a salt of sulphurous acid, preferably sodium hydrogen sulphite, preferably at a temperature between 90 and 120 DEG C. The monoacyl hydrazines may be those of aliphatic, aromatic, cycloaliphatic, araliphatic or heterocyclic acids and may be substituted by halogen atoms, sulphonic acid amide groups, nitrile groups, alkoxy groups, or free or substituted hydroxyl or amino groups. Specified compounds are 2-(b -benzoyl-hydrazino)-naphthalene, 2-(b -41-methoxybenzoyl-hydrazino)-naphthalene, 2-(b -benzoyl-hydrazino)-8-hydroxy-naphthalene-6-sulphonic acid, 2-(b -benzoyl-hydrazino)- 5-hydroxy-naphthalene-7-sulphonic acid, 1-(b -benzoyl-hydrazino)-5-hydroxy-naphthalene-7-sulphonic acid, 2-(b -41- methanesulphonylamino-benzoyl)- hydrazino) -naphthalene, 2-(b -salicoyl-hydrazino)-naphthalene. Specified hydroxy or amino naphthalenes are 2-hydroxy-naphthalene-3-carboxylic acid; 2,7-dihydroxy-naphthalene; 2,3-dihydroxy-naphthalene; 1,5-dihydroxy-naphthalene; 2-hydroxy-7-amino-naphthalene; 2,7-diamino-naphthalene; 2,3-diamino-naphthalene; 2,8-dihydroxy-naphthalene-6-sulphonic acid; 2,5-dihydroxy-naphthalene-7-sulphonic acid; 1,5-dihydroxy-naphthalene-7-sulphonic acid; 2-amino-5-hydroxy-naphthalene-7-sulphonic acid; 2-amino-8-hydroxy-naphthalene-6-sulphonic acid and 1-amino-5-hydroxy-naphthalene-7-sulphonic acid. Specified hydrazines are benzoic acid hydrazide; 4-chlorobenzoic acid hydrazide, 4-methoxybenzoic acid hydrazide, salicylic acid hydrazide, 4-hydroxybenzoic acid hydrazide, 2-aminobenzoic acid hydrazine, 3-aminobenzoic acid hydrazide, 4-aminobenzoic acid hydrazide, benzoic acid hydrazide-3-sulphonic acid amide, 2-hydroxyl-naphthalene-3-carboxylic acid hydrazide, 1-amino-anthraquinone-2-carboxylic acid hydrazide, furan-2-carboxylic acid hydrazide, pyridine-4-carboxylic acid hydrazide, pyridine-3-carboxylic acid hydrazide, terephthalic acid-bis-hydrazide, acetic acid hydrazide, propionic acid hydrazide, stearic acid hydrazide, cyanoacetic acid hydrazide, b -methoxy-propionic acid hydrazide, diethylamino-acetic acid hydrazide, 2,4-dichlorophenoxy acetic acid hydrazide, phenylacetic acid hydrazide, hexahydrobenzoic acid hydrazide, carbonic acid ethyl ester hydrazide, semicarbazide, carbohydrazide, thiosemicarbazide, oxalic acid-bis-hydrazide, benzoic acid-a -methyl hydrazide and benzoic acid-b -methyl hydrazide. In an example 2-hydroxy-naphthalene-3-carboxylic acid is refluxed with aqueous sodium hydrogen sulphite solution and benzoic acid hydrazide, until the evolution of carbon dioxide is completed when 20% hydrochloric acid is added dropwise until the solution constantly has an acid reaction. The precipitated reaction product is suction filtered, washed with water and dried to give 2-(b -benzoyl-hydrazino)-naphthalene. By using anisic acid hydrazide instead of benzoic acid hydrazide 2-(b -41-methoxy benzoyl hydrazino)-naphthalene is obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0790233-A3 |
| priorityDate | 1960-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 108.