http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002530381-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 |
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-2002530381-A |
titleOfInvention | Method for producing 1-substituted 5- or 3-hydroxypyrazoles |
abstract | (57) The present invention relates to a compound of the formula I or II wherein R 1 is C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 3 -C 6 cycloalkyl. or a C 1 -C 4 alkoxy, these groups halogen, C 1 -C 4 alkoxy, phenoxy, C 1 -C 6 alkoxycarbonyl, a C 1 -C 6 alkylthiocarbonyl or 3 to 14 ring atoms, Which may be substituted with a ring system having 1-substituted 5- and / or 3-hydroxypyrazole. The method comprises the steps of reacting a 3-alkoxyacrylic acid alkyl ester of the formula III wherein R 2 and R 3 are independently C 1 -C 6 alkyl or C 3 -C 6 cycloalkyl, Wherein R 1 has the meaning given above) with hydrazine at a pH of 6 to 11 to produce 5-hydroxypyrazoles of the formula I, or b) at pH 11 to 14 to react with a hydrazine of the formula II Producing hydroxypyrazole. |
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: 134.