http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-442730-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C323-00 |
| filingDate | 1934-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1936-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-442730-A |
| titleOfInvention | Improvements in or relating to the manufacture of dyestuff intermediates |
| abstract | Arylmercaptans are obtained by condensing benzene or its alkyl-, halogen- or alkyl-halogen-derivatives with sulphur dioxide and aluminium chloride, and reducing, without isolating, the aluminium complex compound obtained, with an acid reducing agent. The products, in which the SH group takes up a position pto the halogen atom, are converted into thioglycollic acids by means of the usual condensation with chloracetic acid. According to examples 1 : 4-dimethyl-2-chlorobenzene reacts with SO2 and aluminium chloride to give the sulphinic acid addition product, which is reduced with zinc and hydrochloric acid to give 1 : 4-dimethyl-2-chlorbenzene - 5 - mercaptan, which may be isolated or converted with sodium chloracetate into 1 : 4-dimethyl-2-chlorobenzene-5-thioglycollic acid; 1 - methyl - 3 - chlorobenzene is similarly converted into the 6-sulphinic addition product, the 6-mercaptan and finally 1-methyl-3-chloro-6-thioglycollic acid. |
| priorityDate | 1933-08-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.