| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f6e960aa6ad2ba6401030159343ebe68 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C227-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-02 |
| filingDate |
1993-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1994-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a1995bbe20eb703e74842672a05307a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86f141b82f2044a686b17a93e59be7c3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eed1a723dbcc46d3dd209b5c8155eb55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_deb66e38713ace683f7d6a5ad6f0188f |
| publicationDate |
1994-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5371285-A |
| titleOfInvention |
Method of producing keto acids |
| abstract |
In a method of producing a keto acid having the general formula ##STR1## wherein R 1 and R 2 independently represent an alkyl of 1-6 carbons or a cycloalkyl of 4-8 carbons, by reacting an m-aminophenol having the general formula ##STR2## wherein R 1 and R 2 are the same as above, with phthalic anhydride, in an organic solvent, the improvement comprising effecting the reaction in an amount of the organic solvent which is insufficient to dissolve the keto acid produced in the reaction, so that at least a portion of the resultant keto acid crystallizes out of the solvent and allowing the reaction to proceed in a heterogeneous system. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1301962-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106349091-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0858993-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0853079-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5925787-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5917086-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106008240-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7074959-B2 |
| priorityDate |
1991-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |