| Predicate |
Object |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K31-445
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D405-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P43-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D405-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-443
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P43-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-445
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D- |
| filingDate |
2002-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_606378a54d36309b39ac14bb47db8ec6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ee4b54803e225882ee741c0ed4c45de |
| publicationDate |
2003-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2003083501-A1 |
| titleOfInvention |
Process for preparing paroxetine HCl which limits formation of pink colored compounds |
| abstract |
The present invention provides a process for preparing paroxetine HCl from paroxetine base which provides paroxetine HCl substantially free of pink-colored compounds or an impurity identified by an HPLC RRT of about 1.5. The processes of the present invention utilize a buffer, a molar ratio of HCl to paroxetine base of less than one, and crystallize/recrystallize in the presence of an effective amount of an anti-oxidants. A preferred way to create a buffer is by using ammonium chloride. A preferred anti-oxidant is ascorbic acid. n The present invention also provides for re-crystalizing paroxetine HCl prepared by the above methods or any other methods in the presence of an effective amount of an anti-oxidant such as ascorbic acid. A preferred solvent system for recrystallization is a mixture of acetone and methanol. n Processes of the present invention can combine these various features. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6777554-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016106727-A1 |
| priorityDate |
2001-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |