AGENT FOR PROTECTION OF CULTURED PLANTS FROM PHYTOTOXIC ADVERSE EFFECT OF HERBICIDES, N- ACYLSULFONAMIDES Russian patent published in 2002 - IPC

FIELD: organic chemistry, agriculture, herbicides. SUBSTANCE: invention describes an agent used for protection of cultured plants from phytotoxic adverse effect of herbicides from the group of sulfonylureas, imazetapir, phenoxyprop- ethyl, 2,6-bis-[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoic acid sodium salt comprising compound of the formula (I) where R¹ means hydrogen atom, unsubstituted C₁-C₁₂-alkyl or that substituted with one or more similar or different radicals taken among the group: halogen atom, hydroxy-group, unsubstituted phenyl or phenyl substituted with halogen atom, radical of the group Z^a- R^a; C₂- C₈-alkenyl; C₃- C₈-cycloalkyl; C₁- C₈-alkoxy-group; C₁- C₈-alkylthio-group; phenyl substituted with one or more similar or different radicals taken among the group: C₁- C₄- alkoxy-group, halogen atom; furanyl, thienyl; R²- means hydrogen atom; R¹ and R² in common with the group CO-N- form 5- membered saturated heterocyclic ring; R³ means halogen atom, radical of the formula -Z^b- R^b; R⁴- means hydrogen atom; R⁵- means halogen atom, nitro-, hydroxy-group, radical of the formula -Z^c- R^c; R^a means C₁- C₈-alkyl, unsubstituted phenyl or phenyl substituted with halogen atom; R^b, R^c mean independently each of other unsubstituted C₁- C₈-alkyl or that substituted with halogen atom; Z^a means groups: -O-, -CO-O-, -NH; Z^b,Z^c mean independently each of other groups: -O-, -S-, -CO-O-, -NH- being a bond indicated from the right is a bond with a residue R^a,R^b or R^c; n = 0, 1, 2; m = 0, 1, 2, 3, or alkaline metals salts. Invention describes also novel N-acylsulfonamides of the general formula (I) and their alkaline metals salts used in the agent. N- acylsulfonamides decrease and eliminate adverse phytotoxic effects of herbicides on cultured plants significantly. EFFECT: valuable protective effects of agents. 7 cl, 2 tbl