http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002530380-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D231-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D231-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 1999-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2002-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2002530380-A |
| titleOfInvention | Method for producing 1-substituted-5-hydroxypyrazole |
| abstract | (57) Abstract: The present invention provides a compound of the formula I wherein R 1 is C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 3 -C 6 -cyclo. Alkyl or C 1 -C 4 -alkoxy, wherein these groups are halogen, C 1 -C 4 -alkoxy, phenoxy, C 1 -C 6 -alkoxycarbonyl, C 1 -C 6 -alkylthiocarbonyl or 3 Which may be substituted by a ring system having up to 14 ring atoms]. This method comprises the steps of: a) an alkyl vinyl ether of the formula III wherein R 2 is C 1 -C 6 -alkyl or C 3 -C 6 -cycloalkyl, and phosgene IVa, “diphosgene” IVb or Reacting with “triphosgene” VIc to obtain an acid chloride of formula V; b) removing the corresponding chloride of formula VI by removing hydrogen chloride from the acid chloride. C) reacting the acid chloride with a hydrazine of formula VII wherein R 1 is as defined above to form a 5-hydroxypyrazole of formula I Comprising obtaining. |
| 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: 132.