SUBSTITUTED PYRAZOLYL PYRAZOLE DERIVATIVE AND USE THEREOF AS HERBICIDE Russian patent published in 2018 - IPC C07D471/04 C07D487/04 A01N43/56 A01P13/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a pyrazolyl pyrazole derivative of formula (I), where R¹ represents a halogen atom, R² represents a cyano group, a nitro group or a halogen atom, R³ represents a hydrogen atom, a trifluoroacetyl group or a pentafluoropropionyl group, R⁴-R⁹ may be the same or different and represent hydrogen atoms, halogen atoms, C₁-C₆alkyl groups that may be substituted with one or more halogen atoms, depending on the case, C₃-C₆cycloalkyl groups which may be substituted with one or more halogen atoms depending on the case, or C₂-C₆alkenyl groups, which may be substituted with one or more halogen atoms, depending on the case, a is 3–5, and b is 0–2.

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EFFECT: claimed compound can effectively control major weeds having higher leaf ages which become a practical problem.

7 cl, 4 tbl, 7 ex