| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_887e4f96c5048e400a7a67f1b78eb1ec |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-83
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P25-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-88 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P25-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-88
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-87
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D- |
| filingDate |
2000-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85d559c452c49df7e8b3c3e503c0aa58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2bf4f48b9c6d32a6f3febee823076f05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a125249188ddabb4af6e2982358ce8fc |
| publicationDate |
2001-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1118614-A3 |
| titleOfInvention |
Process for the preparation of 5-carboxyphthalide |
| abstract |
There is described a process for the preparation of 5-carboxy phthalide, which comprises adding terephthalic acid to fuming sulfuric acid containing at least 20% by weight of SO3, then adding formaldehyde to the mixture, heating the mixture at a temperature of 120-145 DEG C and isolating 5-carboxyphthalide from the reaction mixture. |
| priorityDate |
2000-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |