FIELD: chemistry.
SUBSTANCE: present invention relates to a method of producing 3-dihalomethyl-pyrazole-4-carboxylic acid of formula (I) 
by reacting α-fluoroamines of formula (III) 
in the presence of Lewis acids with acrylic acid derivatives of formula (II) 
to obtain vinamidinium salts of formula (IV) 
and subsequent reaction thereof with hydrazines, and vinamidinium salts themselves of formula (V) 
and intermediate compounds of formula (VI) 
In the structural formulae given below, radicals and symbols have values given in the claim.
EFFECT: simpler and cheaper method of producing 3-dihalomethyl-pyrazole-4-carboxylic acid.
11 cl, 8 ex
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