http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20050041251-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ad09028b761c40ad03333afdea62320 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-22 |
| filingDate | 2003-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0e57b66ff51395b3ce29c0efe169d7d1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_63eb3b34f536a2c277b5ba63ebf559c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e1ddbb50fcbf3d571bf72fbc126dbb5d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b0480ea35664bc05ece554e2ac7a8759 |
| publicationDate | 2005-05-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20050041251-A |
| titleOfInvention | Processes for the preparation of cephalosporin derivatives |
| abstract | In the present invention, the compound of formula 4 is reacted with acetaldehyde in the presence of a base (first base) in a mixed solvent containing water, isopropanol, and methylene chloride in a ratio (volume ratio) of 1: 3 to 6:11 to 14, respectively. Stereoselectively preparing a compound of Formula 3; And reacting the compound of formula 2 in anhydride form with the compound of formula 3 in the presence of a base (second base):n n n <Formula 1>n n n n n n n n <Formula 2>n n n n n n n n <Formula 3>n n n n n n n n <Formula 4>n n n n n n n n Wherein R 1 is hydrogen or an amino protecting group, R 2 is a hydrogen or carboxyl protecting group, and R 3 is a hydrogen or amino protecting group. |
| priorityDate | 2003-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 71.