191614-02-5Relevant articles and documents
METHOD FOR PREPARING 5-FLUORO-1H-PYRAZOLE-4-CARBONYL FLUORIDES
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Page/Page column 5, (2016/11/17)
- 13 - ABSTRACT The present invention relates to a novel method for preparing 5-fluoro-1H-pyrazole-4-carbonyl fluorides by halogen exchange reaction of 5-chloro-1H-pyrazole-4-carbonyl chlorides with alkali metal fluorides, using non-polar solvents. 5
Process for the preparation of 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilides
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, (2008/06/13)
A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula STR1 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 formula in 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.