FIELD: organic chemistry, chemical technology, herbicides.
SUBSTANCE: invention describes derivatives of pyrazole of the general formula [I]: 
wherein R1 means (C1-C6)-alkyl group; R2 means (C1-C3)-halohenalkyl group; R3 means hydrogen atom,(C1-C3)-alkyl group that can be substituted with one or some substitutes chosen from group substitutes α or formyl group; R4 means hydrogen atom or (C1-C3)-halogenalkyl group (under condition that R4 represents (C1-C3)-halogenalkyl group in case when R3 means hydrogen atom or formyl group, and R4 represents hydrogen atom or (C1-C3)-halogenalkyl group in case when R3 means (C1-C3)-alkyl group that can be substituted with one or some substitutes chosen from group of substitutes α). Also, invention describes methods for synthesis of indicated derivatives of pyrazole that are intermediate compounds used in synthesis of derivatives of isoxazoline showing the excellent herbicide activity and selectivity with respect to cultural plants and weeds.
EFFECT: improved method of synthesis, valuable properties of compounds.
15 cl, 16 tbl, 40 ex
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