| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3b9f373878f16dc291ff597162e9b344 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-1804
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D205-09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D513-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D499-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D417-12 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-897
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-87
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-861
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D417-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D205-09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D499-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D513-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-18 |
| filingDate |
1983-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
1984-06-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
IE-832877-L |
| titleOfInvention |
(5r) penems |
| abstract |
A new process is described for the preparation of (5R)-penem derivatives of the general formula I: <IMAGE> I wherein R1 represents a hydrogen atom or an organic group; R2 represents a hydrogen atom or a carboxy protecting group and Y represents a hydrogen or halogen atom or an organic group. A 2-thiacephem derivative of the general formula II: <IMAGE> II wherein R1, R2 and Y have the meanings/given above is oxidized by means of organic peracids to the corresponding sulphone of the general formula III: <IMAGE> III which is subsequently submitted to a desulphurative ring contraction by extrusion of SO2 to give exclusively the desired (5R)-penem derivatives of the general formula I.n[US4585874A] |
| priorityDate |
1982-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |