DERIVATIVE OF SUBSTITUTED PYRAZOLYL PYRAZOLE AND USE THEREOF AS HERBICIDE Russian patent published in 2019 - IPC C07D471/04 A01N47/18 A01P13/00 

FIELD: chemistry.

SUBSTANCE: invention relates to compounds of formula (I). In general formula (I) R¹ is a chlorine atom, R² is cyano group, R³ and R⁴ can be simultaneously identical or different from each other and represent C₁-C₆alkyl groups, C₃-C₆cycloalkyl groups, C₁-C₆alkoxy groups, halogen atoms, hydrogen atoms or Cy, and R³ and R⁴ can form a four-seven-member cyclic hydrocarbon together with the carbon atom to which they are bonded, Cy is a phenyl group or a five-six-member heterocyclic group containing 1–2 heteroatoms selected from N, O or S, where the phenyl group can be substituted with one or more halogen atoms, C₁-C₄alkyl groups which can be substituted with one or more halogen atoms, and C₁-C₄alkoxy groups which can be substituted with one or more halogen atoms, and a is equal to 4.

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EFFECT: invention is able to effectively combat harmful weeds at the high leaf stage, as well as to an herbicidal composition based thereon, a method of controlling undesirable plants and use thereof for controlling undesirable plants.

6 cl, 5 tbl, 1 ex