SUBSTITUTED DERIVATIVES OF PYRAZINE AND HERBICIDE AGENT BASED ON THEREOF Russian patent published in 2000 - IPC

FIELD: organic chemistry, herbicides. SUBSTANCE: invention describes the novel substituted derivatives of pyrazine of the general formula (I) where X means oxygen, sulfur atom, sulfoxide- or sulfo-group; n = 0, 1 or 2; R¹ means hydrogen atom, C₁-C₁₂-haloidalkyl, nitro-group or halogen atom; R² means hydrogen or halogen atom; R³ means hydrogen atom; Z means the group (a) or (b) where R⁴ means hydrogen atom; R⁵ means C₁-C₁₂-alkyl, C₁-C₁₂-haloidalkyl, C₃-C₆-cycloalkyl, phenyl group being phenyl group can be once or repeatedly substituted with halogen atom or C₁-C₄-haloidalkyl; R⁶ means hydrogen atom or C₁-C₄-alkyl; Y means oxygen or sulfur atom under condition that if X means O and Z means the group (C) then Z is not bound with pyrazine ring at position 6 as in salts usually used in agriculture. EFFECT: high herbicide activity of compounds, broadened spectrum of possible uses. 5 cl, 19 tbl, 6 ex