http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CS-235197-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a5216512c820a8524d117de905d60eed http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2678584c4f8e2d70ca75a7e13f16cee3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 |
| filingDate | 1984-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e89b166024b660fc6ffe8311522033d9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_08651df46b1e0056cda6e3b1320a85c7 |
| publicationDate | 1985-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CS-235197-B1 |
| titleOfInvention | Process for preparing 4,9-dihydro-3,9-dimethyl-4-oxo-1H-pyrazolo (3,4-b) quinolines |
| abstract | The present invention relates to a new method of preparationn4,9-dihydro-3,9-dimethyl-4-oxo-1H-pyrazolo-n[3,4-b] quinolines, characterized in thatnalkylates 4,9-dihydro-3-methyl- disodium saltn-4-oxo-1H-pyrazolo [3,4-b] quinolines in dimethylformamidenwith methyl iodide at 0 ° Cnto 30 ° C, preferably at 20 ° C, barrelnthe reaction mixture is crystallized from methanol,nethanol or n-propanol, preferably ethanol,nand a mixture of 4,9-dihydro-1,3,9-trimethyl-4-oxo-1H-pyrazolo [3,4-b] quinolinesnand 4,9-n-dihydro-2,3,9-trimethyl-4-pxo-2H-pyrazolo · -n[3,4-b] quinolines are heated with the hydrochloridenpyridine at 200 to 240 ° C, preferablynat 220 ° C. |
| priorityDate | 1983-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.