Process for the preparation of pyrazoles

Process for the preparation of pyrazoles

There is provided a process for the production of pyrazole compounds of general formula (II): wherein R represents H or R ; which process comprises the reaction of a compound of general formula (III), wherein R and R independently represent C1-C6 alkyl, R is as defined herein before, with an acylati...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HARRIS, LAURENCE JAMES, LEVETT, PHILIP CHARLES
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:There is provided a process for the production of pyrazole compounds of general formula (II): wherein R represents H or R ; which process comprises the reaction of a compound of general formula (III), wherein R and R independently represent C1-C6 alkyl, R is as defined herein before, with an acylating agent in the presence of a base, followed by in situ reaction with a hydrazine compound, wherein said process is optionally carried out in the presence of an activating agent.