HERBICIDES Russian patent published in 2020 - IPC C07D401/14 C07D213/73 C07D213/74 C07D413/14 C07D417/14 A01N43/40 A01P13/00 

FIELD: agriculture.

SUBSTANCE: invention relates to herbicidally active pyridino-/pyrimidinopyridine derivatives of formula (I):

or salt thereof, where: X¹ is N or CR¹; R¹ is selected from a group consisting of hydrogen, cyano, fluorine, chlorine, methoxy, difluoromethoxy and trifluoromethyl; R² is selected from a group consisting of C₁-C₆ alkyl, C₁-C₆ haloalkyl, cyano, -C(O)CF₁-C₆alkyl, C₁-C₆alkoxy or phenyl; R³ is selected from a group consisting of hydrogen, C₁-C₆alkyl, C₂-C₆alkenyl, C₂-C₆alkynyl, phenyl, benzyl, -(CH₂)C₃-C₁₀cycloalkyl, -CH(CH₃)phenyl, -CH₂C(O)OC₁-C₆alkyl and -CH(CH₃)C(O)OC₁-C₆alkyl, wherein said benzyl and phenyl are optionally substituted with 1–3 independent R⁸; R⁴ denotes hydrogen, C₁-C₆alkyl or C₂-C₆alkenyl; or R³ and R⁴ together with a nitrogen atom, to which they are bonded, form a pyrrolidinyl, piperidyl, morpholinyl, thiomorpholinyl or piperazinyl ring, optionally substituted with 1–3 R⁸; each R⁸ is independently selected from a group, consisting of halogen, C₁-C₆alkyl, C₁-C₆haloalkyl and C₁-C₆alkoxy; n equals 0 or 1; p equals 0, 1 or 2; and q equals 0, 1 or 2; as well as methods of use thereof.

EFFECT: herbicides are disclosed.

8 cl, 9 tbl, 8 ex