| 摘要 |
A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula <IMAGE> in which Ar represents optionally substituted phenyl, which process comprises a) reacting in a first stage, 1,3-dimethyl-5-chloro-pyrazole-4-carbonyl chloride with a fluoride, if appropriate in the presence of a diluent, and b) reacting in a second stage, the 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride obtained in this reaction with an aniline of the formulaH2N-Arin which Ar has the abovementioned meaning, if appropriate in the presence of an acid acceptor and if appropriate in the presence of a diluent. 1,3-Dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride as a new compound.
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