http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0233150-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D401-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N43-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D401-04 |
| filingDate | 1987-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1992-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1992-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0233150-B1 |
| titleOfInvention | Process for the preparation of 2-(imidazolin-2-yl)-pyridine and like quinoline-3-carboxylic acids |
| abstract | There is disclosed a process for the preparation of 2-(imidazolin-2-yl)-3-pyridine and -3-quinolinecarboxylic acids of formula <IMAGE> wherein R1 is hydrogen or C1-C4alkyl, R2 is hydrogen, halogen, C1-C4alkyl, C1-C4hydroxyalkyl, C1-C4alkoxy, phenyl or phenyl-C1-C4alkyl, or phenyl or phenyl-C1-C4-alkyl, each substituted by one C1-C4alkyl, C1-C4alkoxy or halogen, R3 is hydrogen, C1-C4alkyl, phenyl, phenyl-C1-C4-alkyl, or phenyl or phenyl-C1-C4-alkyl, each substituted by one C1-C4alkyl, C1-C4alkoxy or halogen, R2 and R3 together are 1,3-butadienylene which can be substituted by halogen, C1-C4alkyl, C1-C4alkoxy, C1-C4 haloalkyl, C1-C4alkylsulfonyl, nitro, cyano, phenyl, phenoxy, or phenyl or phenoxy, each substituted by one C1-C4alkyl, C1-C4alkoxy or halogen, and R4 and R5 are each independently of the other C1-C4alkyl. In this process, the 2-(imidazolin-2-yl)-3-pyridine- and -3-quinolinecarboxylic acids of the above formula are obtained by reacting a 2,3-pyridine- or 2,3-quinolinedidicarboxylic acid ester of formula <IMAGE> wherein R1, and R2 and R3 are as defined above and R6 is C1-C8alkyl, phenyl or C1-C4phenylalkyl with a 2-aminoalkanecarboxamide of formula <IMAGE> wherein R4 and R5 are as defined above, in an inert solvent and in the presence of a strong base, direct to a salt of a 2-(imidazolin-2-yl)-3-pyridine- or -3-quinolinecarboxylic acid of the above formula, from which the free 2-(imidazolin-2-yl)-3-pyridine- or -3-quinolinecarboxylic acids of the above formula are obtained by converting said salt into an aqueous solution and adding an acid. The 2-(imidazolin-2-yl)-3-pyridine- and -3-quinolinecarboxylic acids of the above formula have herbicidal properties and can be used for controlling undesired plant growth. |
| priorityDate | 1986-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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