http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-436805-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_896230771cb30971aee86850de995c94 |
| filingDate | 1934-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1935-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-436805-A |
| titleOfInvention | Manufacture of naphthylamine derivatives |
| abstract | 1-Hydroxyalkylamino-5-naphthols and (or) 1 : 5-di(hydroxyalkylamino)naphthalenes are prepared by treating 1 : 5-dihydroxynaphthalene with a primary hydroxyalkyl amine sulphite in an aqueous medium or with a primary hydroxyalkyl amine in the presence of an aqueous solution of a bisulphite. When a 1-hydroxyalkylamino-5-naphthol is the product desired, the corresponding 1 : 5-di(hydroxyalkylamino)naphthalene may be added to the reaction mixture, to restrain its formation in the reaction. The reaction may be effected under reflux or at 110--115 DEG C. under pressure. In the examples, (1) 1 : 5-dihydroxynaphthalene, ethanolamine, and aqueous sodium bisulphite are heated together and the product is diluted, made strongly alkaline, boiled and cooled, whereupon 1 : 5-di(hydroxyethylamino)-naphthalene separates; the filtrate is acidified to precipitate unchanged 1 : 5-dihydroxynaphthalene, and the filtrate from this is made feebly alkaline to precipitate 1-hydroxyethylamino-5-naphthol; ethanolamine sulphite may be used in place of ethanolamine and sodium bisulphite; (2) 1 : 5-dihydroxynaphthalene, ethanolamine, and aqueous sodium bisulphite are heated together with the addition of 1 : 5-di-(hydroxyethylamino)naphthalene, and the product is worked up as in example 1. Specification 410,843 is referred to. |
| priorityDate | 1934-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.