http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6248888-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_10e4b1416c6e66e0ade5429212414964 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P13-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P9-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D405-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P13-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-497 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P9-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D405-12 |
| filingDate | 1997-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2001-06-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4bb8a4a0e540a32d28f8f8c002b3c48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_650372383efbd99dd1e2b168b9aad84d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_38a28c9abe98a46ae3c827e08db0736c |
| publicationDate | 2001-06-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6248888-B1 |
| titleOfInvention | Process for the preparation of terazosin hydrochloride dihydrate |
| abstract | A process for the preparation of 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride dihydrate, and the product produced thereby, comprising reacting by heating 2-chloro-4-amino-6,7-dimethoxyquinazoline and 1-(2-tetrahydrofuroyl)piperazine in a polar organic reaction solution, wherein the polar organic reaction solution comprises a polar organic solvent and a minimum amount of water effective to produce 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride dihydrate. The heat is added, preferably at reflux for a period of time, after which the reaction solution is allowed to cool to room temperature and the crystalline product 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-tetrahydrofuroyl)piperazine hydrochloride dihydrate is filtered and dried. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007161791-A1 |
| priorityDate | 1997-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 92.