http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AR-048217-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K31-4406 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K31-4402 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/C07D213-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-82 |
| filingDate | 2005-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ecee64f68a853298771650c567aa45f8 |
| publicationDate | 2006-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | AR-048217-A1 |
| titleOfInvention | PROCESS FOR THE MANUFACTURE OF 2,3-DICLOROPIRIDINE |
| abstract | A method for preparing 2,3-dichloropyridine and the intermediates 3-amino-2-chloropyridine and 3-aminopyridine. Claim 1: A method for preparing 2,3-dichloropyridine of formula (1), characterized in that it comprises the steps of: a) contacting 3-amino-2-chloropyridine of formula (2) or a solution comprising 3-amino -2-chloropyridine of formula (2), with hydrochloric acid to form a 3-amino-2-chloropyridine hydrochloric acid salt; b) contacting the 3-amino-2-chloropyridine hydrochloric acid salt with a nitrite salt to form a corresponding diazonium chloride salt; and c) contacting the corresponding diazonium chloride salt with hydrochloric acid in the presence of a copper catalyst where at least about 50% of the copper is copper in oxidation state II, optionally in the presence of an organic solvent, to form 2.3 -diclopyridine of formula (1). |
| priorityDate | 2004-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.