http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5639878-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2df2e1189fa8605916aa5ef7b6df8f95 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D205-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-1892 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D205-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B53-00 |
| filingDate | 1995-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37a94f5ab44a9c027ddb1e4a5c5351b9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d55f70d834d35d07fe73e38e3cdbe423 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_06f2a240d2b60b7408689da7840685d3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4d245a237b6388d6b194cc1c31923c4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3c06a4e7f16279e257c36d8ef155c06 |
| publicationDate | 1997-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5639878-A |
| titleOfInvention | Acyloxylation process for preparing 4-acyloxy-2-azetidinone derivatives |
| abstract | The present invention relates to a novel and improved process for preparing 4-acyloxy-2-azetidinone derivatives having the following formula (I) which are useful as an intermediate for synthesis of penem or carbapenem compounds: ##STR1## in which R 1 represents a hydroxy-protecting group; and R 3 represents an acyl group, which comprises reacting an azetidinone derivative having the following formula (II): ##STR2## wherein R 1 is defined as above and R 2 represents an alkyl group or an aryl group, with a N-haloacylimide in the presence of an organic carboxylic acid or a salt of an organic carboxylic acid. n The present invention uses the organic compound, N-haloacylimide, as the reactant rather than the heavy metal reactant used in the prior art, and thus provides an economical advantage and does not cause any problem related to safety and waste disposal after the reaction. |
| priorityDate | 1994-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 197.