http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0556683-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-61 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-61 |
| filingDate | 1993-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1996-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eeb8d686d9b3aab8175da1e5aa67b411 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1c376d9aefb14d0e95c8c871d95205c |
| publicationDate | 1996-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0556683-B1 |
| titleOfInvention | Process for the preparation of 2-chloro-5-methylpyridine |
| abstract | A novel process is provided for the preparation of 2-chloro-5-methylpyridine of the formula (I) <IMAGE> from 3-methylpyridine-1-oxide, of the formula (II), <IMAGE> and phosgene (COCl2), which is characterised in that, in a first step, the 3-methylpyridine-1-oxide is reacted with trimethylamine and then with phosgene, if appropriate in the presence of a diluent, at temperatures between -30 DEG C and +50 DEG C, and the novel intermediate trimethyl(5-methylpyridin-2-yl)ammonium chloride of the formula (III) <IMAGE> which is formed in this process is isolated as a crude intermediate or, if desired, further purified, and, in a second step, this intermediate of the formula (III) is reacted with phosgene at temperatures between 50 DEG C and 150 DEG C. 2-Chloro-5-methylpyridine (I) is known as an intermediate for pharmaceuticals and insecticides. |
| priorityDate | 1992-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.