| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fcd96347d65d8457bb9391f4f8ee3d2a |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P31-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D501-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-546
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-545
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P31-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D501-00 |
| filingDate |
1994-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_345dceb8c546dae00e82318fc93d2969
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_94a39a7df7bf872ae91be944dfa9b9e6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a44f723289c5a85896f16e5a7075cba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3e4f20ae85fdea14bbff1264cbaba18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_83761b97b334d1fc0b25f25b6e452170 |
| publicationDate |
1997-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
SE-505050-C2 |
| titleOfInvention |
Process for making cephem derivatives |
| abstract |
A process for preparing B-lactam derivatives of the formula (I): (I) wherein R1 represents hydrogen or a metal salt; and R2 represents hydrogen, acetoxy methyl, (2,5-dihydro-2-methyl-6-hydroxy-5-oxo-as-triazin-3-yl)thiomethyl or (1-methyl-1-H-tetrazol-5-yl)thiomethyl is disclosed. This process comprises the steps of (a) reacting triphenylphosphine and hexachloroethane or carbon tetrachloride with 2-(2-aminothiazol-4-yl)-2-syn-methoxyimino acetic acid in an organic solvent to give the corresponding acyloxyphosphonium chloride derivative of the formula: (b) acylating a previously silylated derivative of 7-ACA with this acyloxyphosphonium chloride derivative without its isolation. |
| priorityDate |
1991-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |