DERIVATIVES OF PYRAZOLE AND HERBICIDES CONTAINING THEREOF Russian patent published in 2000 - IPC

FIELD: organic chemistry, herbicides. SUBSTANCE: invention describes the novel derivatives of pyrazole of the general formula (I) where R¹ is C₁-C₆-alkyl; R², X¹, X² mean independently C₁-C₄-alkyl; R³ is hydrogen atom or C₁-C₄-alkyl; m = 0 or 1; R⁴ is C₁-C₄-alkyl or the group of the formula where Y is halogen atom, C₁-C₄-alkoxy-group or C₁-C₄-alkyl; n = 0-3; R⁵ is A-group, -S(O)₂-, -C-, -CH₂-C- or (-C-) where R⁵ or R⁶ is hydrogen atom and P = 1-4 and compounds of the general formula (XI) where R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, X³, A², B, n and P have values given in p. 11 of the invention claim. These compounds are used as herbicides. Derivatives of pyrazole of the general formula (I) show selectivity with respect to rice-paddy and maize and in low doses abolish the broad spectrum of weeds in flooded and dry valley fields. Derivatives of pyrazole of the general formula (I) have no phytotoxic effect of rice-paddy plants and in low doses they abolish the broad spectrum of weeds in dry valley and flooded rice fields being especially barnyard-millet and long goutweed. EFFECT: improved method of synthesis, high effectiveness against weeds. 21 cl, 32 tbl, 5 dwg, 65 ex