http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2376857-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P29-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D333-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-381 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P29-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D333-38 |
| filingDate | 1977-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2376857-A1 |
| titleOfInvention | PROCESS FOR PREPARATION OF 3-HALOGENOSULFONYL-THIOFENE-CARBOXYLIC ACIDS AND DERIVATIVES |
| abstract | To prepare 3-halosulfonyl-thiofenecarboxylic acids and derivatives of formula I, a 3-ketothiofan-carboxylic acid or derivative of formula II is reacted, in a first operating stage, with a sulfonic acid or derivative of formula III, this which gives a 3-sulfato-dihydrothiofen-carboxylic acid or derivative corresponding to one of the formulas IVa and IVb, which is reacted in a second operating stage with an alkali polysulfide, the reaction giving an acid polysulfide 3,3 '-bis- (dihydrothiofen-carboxylic acid) or derivative corresponding to one of the formulas Va and Vb, which is reacted in a third operating stage with a chloride or bromide of sulfuric acid or with chlorine, the reaction giving polysulfides of 3,3'-bis- (thiofenecarboxylic acids) or derivatives corresponding to one of the formulas VIa and VIb, which are reacted in a fourth stage of operation with a halogen and water. The thiofen derivatives thus prepared are used in the preparation of medicaments, sweeteners and phyto-sanitary products. |
| priorityDate | 1977-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.