http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1334412-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e9445e5e3626f36e932c6451a928250 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-81 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-803 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D471-04 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-79 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D491-048 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-81 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-803 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D211-90 |
| filingDate | 1985-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1995-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3e106326ba45cae7e245bb1fe04e3768 |
| publicationDate | 1995-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1334412-C |
| titleOfInvention | Process for producing pyridine-2,3-dicarboxylic acid derivatives via novel 1-amino-1,2,3,4- tetrahydropyridine-2,3-dicarboxylic acid derivatives and 1,4-dihydropyridine-2,3-dicarboxylic acid derivatives |
| abstract | A process for producing pyridine-2,3-dicarboxylic acid derivatives of the formula (I) is described. The process is based on the cleavage of HNR10R11 from 1-amino-1,2,3,4-tetrahydropyridine-2,3-dicarboxylic acid derivatives of the formula II (II) to give 1,4-dihydropyridine-2,3-dicarboxylic acid derivatives of the formula III (III); and subsequent oxidation of these compounds to obtain pyridine-2,3-dicarboxylic acid derivatives of the formula I. According to one variant of the process, the 1,4-dihydropyridine-2,3-dicarboxylic acid derivatives of the formula III are obtained directly, without isolation of the intermediately formed l-amino-l,2,3,4-tetrahydro-pyridine-2,3-dicarboxylic acid derivatives of the formula II, by reaction of .alpha.,.beta.-unsaturated hydrazones of the formula IV (IV) with ethene-1,2-dicarboxylic acid derivatives of the formula V (V); and subsequently oxidised to pyridine-2,3-dicarboxylic acid derivatives of the formula I. In the above formulae, R1, R2, R3, R4, R5, R10 and R11 have the meanings defined in claim 1. The pyridine-2,3-dicarboxylic acid derivatives of the formula I are intermediates for producing herbicidal active substances. |
| priorityDate | 1984-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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