http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NZ-511645-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-20 |
| filingDate | 1999-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_95c3e3b2e9c50e17a11df387f17cd6c5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c5de1deac8201c4757e6fb663a16030 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6edb93a2acf9ee6a9d817b681bee4807 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70339a89a5475ebf0616ef99c22e9753 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3caf0a60a29e193e238b7fd274477311 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3e5751d045289699b2d1a8283734b64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53cc5a261c4d9098beb12c107c960623 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd1de02a754662299398b92abbef303c |
| publicationDate | 2003-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | NZ-511645-A |
| titleOfInvention | Method for producing 1-substituted 5- or 3-hydroxypyrazoles |
| abstract | A process for preparing a 1-substituted 5- and/or 3-hydroxypyrazole of the formulae I and II, respectively in which R1 is C1 -C6 -alkyl, C2 -C6 -alkenyl, C2 -C6 -alkynyl, C3 -C6 -cycloalkyl or C1 -C4 -alkoxy. These groups may be substituted by halogen, C1 -C4 -alkoxy, phenoxy, C1 -C6 -alkoxycarbonyl, C1 -C6 -alkylthiocarbonyl or by a cyclic ring system having 3-14 ring atoms. An alkyl vinyl of formula V, reacts with phosgene VIa, "diphosgene" VIb or "triphosgene" VIc, producing an acyl chloride of the formula VII. The alkyl vinyl R2 is C1 -C6 -alkyl or C3 -C6 -cycloalkyl. The acyl chloride is converted by the elimination of hydrogen chloride into 3-alkoxyacryloyl chloride of the formula VIII. Esterifying the 3-alkoxyacryloyl chloride with an alcohol of formula IX, in which R3 is C1 -C6 -alkyl or C3 -C6 -cycloalkyl. This results in the alkyl 3-alkoxyacrylate of the formula III, Reacting the alkyl 3-alkoxyacrylate with a hydrazine of the formula IV, where R1 is defined above a)at a pH of 6-11 to give 5-hydroxypyrazoles of the formula I or b) b) at a pH of 11-14 to give 3-hydroxypyrazoles of the formula II. A 1-substituted 5- and/or 3-hydroxypyrazole of the formulae I and II produced from the above stated process. |
| priorityDate | 1998-11-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 143.