Process for producing a fluorinated acyl acid derivatives, production method of preparation and the fluorine-containing pyrazole carboxylic acid derivative of the fluorine-containing pyrazole carboxylic acid ester derivative

And a base, in a mixture containing a fluorine-containing alkyl carboxylic acid derivative and an acrylic acid ester derivative, by adding a halogenating agent, the following general formula (3) [Formula 1] (Wherein, Rf represents a fluorine-containing alkyl group, R1 and R2 are a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an arylalkyl group, or an acyl group the nitrogen atom to which or and R1 and R2 are attached,, represents an atomic group necessary to form a 5- or 6-membered ring containing, R3 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an arylalkyl group, R4 is an alkyl group, a cycloalkyl group, an aryl group, or an arylalkyl group.) to produce a fluorinated acyl acid derivative represented by the.