FIELD: chemistry.
SUBSTANCE: invention relates to a method for regioselective synthesis of 1-alkyl-3-halogenalkylpyrazole-4-carboxylic acid derivatives by reacting 2-acylated or 2-iminoalkylated acrylic acid derivative with N-alkylhydrazone, followed by cyclisation of the obtained intermediate compound. The invention also relates to an intermediate compound.
EFFECT: high regioselectivity of the method.
3 cl, 5 ex
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