http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2169380-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D249-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D233-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B35-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D521-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-12 |
| filingDate | 1994-08-13^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-10-19^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_137abdcfbc721513def66655d4ea43c4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b3f33c95e184186892ed4f002d9095a |
| publicationDate | 2004-10-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2169380-C |
| titleOfInvention | The preparation of pyrazole and its derivatives |
| abstract | A process is disclosed for preparing pyrazole and its derivatives having formula (I), in which the residues R1, R2, R3 and R4 stand fot hydrogen, halogen, nitro, carboxyl, sulfonyl or C-organic residues, from alpha,beta-unsaturated carbonyl compounds having formula (II) and from hydrazine or hydrazine derivatives having formula (III). The process is characterised in that an alpha,beta-unsaturated carbonyl compound having formula (II) is at first reacted without additional diluting agents with hydrazine or a hydrazine derivative having formula (III), and the thus obtained reaction mixture is reacted in an additional reaction step with a mixture of sulphuric acid and iodine or a iodine-or hydrogen iodide-releasing compound. |
| priorityDate | 1993-08-23^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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