http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-353578-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-43 |
| filingDate | 1930-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1931-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-353578-A |
| titleOfInvention | The manufacture of arylsulphonic-esters of 2.8-dihydroxynaphthalene-6-sulphonic acid |
| abstract | Arylsulphonic esters of 2 : 8-dihydroxy naphthalene-6-sulphonic acid are obtained by treating 2 : 8 dihydroxynaphthalene-6-sulphonic acid with one molecule of an arylsulphochloride in presence of alkali, to give the 8-ester, further treating with arylsulphochloride to give the di-ester, and partially saponifying to the 2-ester, or by treating 2-amino-8-hydroxynaphthalene-6-sulphonic acid with an arylsulphochloride in presence of alkali, and converting the amino-group into the hydroxy group by customary methods. The 2-acylamino compound may be employed with subsequent saponification of the acylamino group. According to examples:-2 : 8-dihydroxynaphthalene-6-sulphonic acid is treated with benzenesulphochloride to give the 8-ester and the di-ester, the former of which is isolated by fractional crystallization; with p-toluene sulphochloride, to give the di-ester, which is saponified to the 2-ester; the benzenesulphonic-2-ester is obtained in a similar-manner; and 2-acetylamino - 8 - hydroxynaphthalene - 6 - sulphonic acid is treated with benzenesulphochloride to give the 8-ester which is saponified to the 2-amino-8-ester, followed by diazotization and conversion to the 2 - hydroxy - 8 - ester. Specification 335,893, [Class 2 (iii), Dyes &c.], is referred to. |
| priorityDate | 1930-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.