| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ddadb999be4f451dfc44d8e359d8f6a |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-343
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-757
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-40 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-757
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-31
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-343 |
| filingDate |
1996-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_758a13c36735d1e031e027e85321cfe9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ceed977155b6a1b9aa14ae46bf2d609d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e1f97dc6908aca54d78efc454f069f9 |
| publicationDate |
2001-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0764630-B1 |
| titleOfInvention |
Process for the preparation of dialkyl succinylsuccinates |
| abstract |
Dialkyl succinylsuccinates are prepared in a pure form and in high yield by reacting an alkali metal alcoholate with an excess of dialkyl succinate under anhydrous conditions followed by isolation of the di(alkali metal) salt of the dialkyl succinylsuccinate and then neutralization of the salt with acid. The resulting dialkyl succinylsuccinate is isolated or used without isolation as an intermediate in the production of quinacridone pigments. The disclosed process provides for high yields and reduced organic waste compared with known processes. |
| priorityDate |
1995-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |