Processes for treating substituted pyrazoles

The present invention relates to improvements in processes towards the production 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid, which is a useful intermediate in fungicide production. In particular, the invention relates to a process for treating a compound of formula III wherein R1 is C1...

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Bibliographische Detailangaben
Hauptverfasser:	MUXWORTHY, JAMES PETER, MCDOUGALD, GRAHAM, WILDE, BEVERLEY ANN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMISTRY FISHING FORESTRY HETEROCYCLIC COMPOUNDS HUMAN NECESSITIES HUNTING METALLURGY ORGANIC CHEMISTRY PEST REPELLANTS OR ATTRACTANTS PLANT GROWTH REGULATORS PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF TRAPPING
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Beschreibung
Zusammenfassung:	The present invention relates to improvements in processes towards the production 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid, which is a useful intermediate in fungicide production. In particular, the invention relates to a process for treating a compound of formula III wherein R1 is C1-C6 alkyl and R2 is CF3, CF2H or CFH2, comprising the steps of (a) contacting a compound of formula III with base, and (b) separating the compound of formula III and the base.