N-acylsulfonamides, novel mixtures of herbicides and antidotes, and their use

The method for protecting crop plants against phytotoxic side effects of pesticides, wherein compounds of the formula (I) or salts thereof are used as safening agents,

• and where, in formula (I),
• R1 is hydrogen, a hydrocarbon radical, a hydrocarbonoxy radical, a hydrocarbonthio radical or a heterocyclyl radical, each of the last-mentioned 4 radicals being unsubstituted or substituted by one or more identical or different radicals selected from the group consisting of halogen, cyano, nitro, amino, hydroxyl, carboxyl, formyl, carboxamide, sulfonamide and radicals of the formula —Za—Ra,
• R2 is hydrogen or (C1-C4)-alkyl, or
• R1 and R2 together with the group of the formula —CO—N— are the radical of a 3- to 8-membered saturated or unsaturated ring and
• R3, in the event that n=1, or the R3 radicals independently of one another, in the event that n is greater than 1, is, or are, in each case halogen, cyano, nitro, amino, hydroxyl, carboxyl, formyl, CONH2, SO2NH2 or a radical of the formula —Zb—Rb,
• R4 is hydrogen or (C1-C4)-alkyl,
• R5, in the event that m=1, or the R5 radicals independently of one another, in the event that m is greater than 1, is, or are, in each case halogen, cyano, nitro, amino, hydroxyl, carboxyl, CHO, CONH2, SO2NH2 or a radical of the formula —Zc—Rc,
• Ra is a hydrocarbon radical or a heterocyclyl radical, each of the two last-mentioned radicals being unsubstituted or substituted by one or more identical or different radicals selected from the group consisting of halogen, cyano, nitro, amino, hydroxyl, mono- and di-[(C1-C4)-alkyl]amino, or is an alkyl radical in which more than one non-adjacent CH2 group is in each case replaced by an oxygen atom,
• Rb, Rc independently of one another are a hydrocarbon radical or a heterocyclyl radical, each of the two last-mentioned radicals being unsubstituted or substituted by one or more identical or different radicals selected from the group consisting of halogen, cyano, nitro, amino, hydroxyl, phosphoryl, halo-(C1-C4)-alkoxy, mono- and di-[(C1-C4)-alkyl]amino, or are an alkyl radical in which more than one non-adjacent CH2 group is in each case replaced by an oxygen atom,
• Za is a divalent group of the formua —O—, —S—, —CO—, —CS—, —CO—O—, —CO—S—, —O—CO—, —S—CO—, —SO—, —SO2—, —NR*—, —CO—NR*—, —NR*—CO—, —SO2—NR*— or —NR*—SO2—, the bond shown on the right of the divalent group in question being the bond to the radical Ra and the R* radicals in the last-mentioned 5 radicals independently of one another being in each case H, (C1-C4)-alkyl or halo-(C1-C4)-alkyl,
• Zb,Zc independently of one another are a direct bond or divalent group of the formula —O—, —S—, —CO—, —CS—, —CO—O—, —CO—S—, —O—CO—, —S—CO—, —SO—, —SO2—, —NR*—, —SO2—NR*—, —NR*—SO2—, —CO—NR*— or —NR*—CO—, the bonds given on the right of the divalent group in question being the bond to the radical Rb or Rc, and the R* radicals in the last-mentioned 5 radicals independently of one another in each case being H, (C1-C4)-alkyl or halo-(C1-C4)-alkyl,
• n is an integer from 0 to 4, and
• m is an integer from 0 to 5.