http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H05339220-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f6e960aa6ad2ba6401030159343ebe68 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-52 |
| filingDate | 1992-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eed1a723dbcc46d3dd209b5c8155eb55 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_942eb39bf2b3dd3657c762945155da8b |
| publicationDate | 1993-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H05339220-A |
| titleOfInvention | Method for purifying keto acid |
| abstract | (57) [Abstract] [Purpose] A keto acid derivative obtained by the reaction of N, N-dialkyl-m-aminophenol and phthalic anhydride, which contains a coloring substance such as a by-produced rhodamine compound. Another object of the present invention is to provide a method for purifying a keto acid derivative by industrially advantageously removing such a coloring substance from the keto acid derivative without using an alkali or the like. [Structure] General formula (I) obtained by the reaction of N, N-dialkyl-m-aminophenol and phthalic anhydride (In the formula, R 1 and R 2 each independently represent an alkyl group having 1 to 6 carbon atoms.) In the method for purifying a keto acid derivative, the keto acid derivative is used as a hydrogenation catalyst in a reaction solvent. Hydrogenate in the presence of the keto acid derivative from the resulting reaction solution. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106117239-A |
| priorityDate | 1992-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.