| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03627f82d4edc6567f9627df6efdde5d |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D491-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N43-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-048
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-80 |
| filingDate |
1993-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a018f0f051856324f225e82506dbffb4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d5725efe66beb0b6cac6d07dccf127fc |
| publicationDate |
1993-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2089136-A1 |
| titleOfInvention |
Process of conversion of pyridine 2,3-dicarboxylic acid esters to cyclic anhydrides |
| abstract |
ABSTRACT OF THE DISCLOSURE In one embodiment this invention provides a process for converting a pyridine-2,3-dicarboxylic acid diester to the corresponding cyclic anhydride directly, without any recovery and purification of the pyridine-2,3-dicarboxylic acid intermediate. An important aspect of the invention process is the utility of pure pyridine-2,3-dicarboxylic acid diester starting matter. A procedure for providing pure diester starting material is demonstrated. |
| priorityDate |
1992-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |