1,5-diphenylpyrazolyl-3-oxyalkyl acids and 1-phenyl-5-thienylpyrazolyl-3-oxyalkyl acids and the use thereof for control of unwanted plant growth

A compound comprising a 1,5-Diphenylpyrazolyl-3-oxyalkyl acid and/or a 1-phenyl-5-thienylpyrazolyl-3-oxyalkyl acid of formula (I), and/or an agrochemically acceptable salt thereof,

• where
• A is selected from the group consisting of A1-A3,
• R1 is selected from the group consisting of
• OR1a and
• NR9R10;
• where
• R1a is selected from the group consisting of
• hydrogen;
• methyl, ethyl which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C3-C6)-cycloalkyl, (C1-C4)-trialkylsilyl, (C1-C6)-alkoxy, cyano and nitro;
• (C2-C6)-alkenyl, (C2-C6)-haloalkenyl;
• (C2-C6)-alkynyl,
• (C3-C6)-cycloalkyl which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C1-C6)-alkyl, (C3-C6)-cycloalkyl;
• (C1-C4)-alkyl-SO—(C1-C4)-alkyl, (C1-C4)-alkyl-SO2—(C1-C4)-alkyl;
• heterocyclyl, heteroaryl and aryl which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C1-C6)-alkyl, (C1-C6)-haloalkyl;
• heterocyclyl-(C1-C4)-alkyl, heteroaryl-(C1-C4)-alkyl and aryl-(C1-C4)-alkyl, where the heterocyclyl, heteroaryl and aryl is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C1-C6)-alkyl, (C1-C6)-haloalkyl;
• R9 is selected from the group consisting of hydrogen, (C1-C12)-alkyl;
• R10 is selected from the group consisting of
• hydrogen;
• aryl, heteroaryl, heterocyclyl, which is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C1-C6)-alkyl, (C1-C6)-haloalkyl;
• (C3-C7)-cycloalkyl-(C1-C4)-alkyl, heterocyclyl-(C1-C4)-alkyl, heteroaryl-(C1-C4)-alkyl, aryl-(C1-C4)-alkyl, aryl-(C1-C4)-alkoxy;
• where the cycloalkyl, heterocyclyl, heteroaryl and aryl is unsubstituted or substituted by one or more substituents selected from the group consisting of halogen, (C1-C6)-alkyl, (C1-C6)-haloalkyl;
• (C1-C12)-alkyl;
• (C3-C8)-cycloalkyl, (C2-C12)-alkenyl, (C5-C8)-cycloalkenyl, (C2-C12)-alkynyl;
• where the abovementioned alkyl, cycloalkenyl, alkenyl, cycloalkenyl and alkynyl radicals are unsubstituted or each independently substituted by m radicals selected from the group consisting of cyano, nitro, OR5, S(O)nR5, SO2NR6R7, C(O)OR8, CONR6R8, COR6, NR6R8, NR6COR8, NR6CONR8R8, NR6CO2R8, NR6SO2R8, NR6SO2NR6R8, C(R6)═NOR8;
• (C1-C12)-haloalkyl;
• S(O)nR5, cyano, nitro, OR5, SO2NR6R7, C02R8, COR8, NR6R8, NR6COR8, NR6CO2R8, NR6SO2R8;
• or
• R9 and R10 together with the nitrogen atom to which they are attached form a saturated, partially or fully unsaturated five-, six- or seven-membered ring which is optionally mono- to hexasubstituted by radicals from the group consisting of halogen, (C1-C6)-alkyl, halo-(C1-C6)-alkyl, OR5, S(O)nR5, CO2R8, CONR6R8, COR6 and C(R6)═NOR8 and which, in addition to this nitrogen atom, contains r carbon atoms, o oxygen atoms, p sulfur atoms and q elements from the group consisting of NR7, CO and NCOR7 as ring atoms;
• R5 is (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C1-C6)-haloalkyl or aryl;
• R6 is hydrogen or R5;
• R7 is hydrogen, (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C3-C4)-alkenyl or (C3-C4)-alkynyl;
• R8 is hydrogen, (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C3-C4)-alkenyl or (C3-C4)-alkynyl;
• R2a is selected from the group consisting of
• hydrogen;
• methyl;
• R2b is hydrogen;
• R3 is selected from the group consisting of
• halogen, cyano, isocyano, NO2;
• (C1-C6)-alkyl, (C3-C6)-cycloalkyl, (C1-C6)-haloalkyl, (C1-C6)-alkylcarbonyl, (C1-C6)-haloalkylcarbonyl, (C1-C4)-alkyloxycarbonyl;
• (C2-C3)-alkenyl, (C2-C3)-haloalkenyl;
• (C2-C3)-alkynyl, (C2-C3)-haloalkynyl;
• (C1-C2)-alkyl-S(O)n and (C1-C2)-haloalkyl-S(O)n;
• CHO;
• NH2;
• R4 is phenyl, where the phenyl radical is unsubstituted or mono- or polysubstituted by a radical selected from the group consisting of
• halogen, cyano, isocyano, nitro;
• (C1-C6)-alkyl, (C1-C6)-haloalkyl, (C1-C3)-haloalkoxy;
• (C2-C3)-alkenyl, (C2-C3)-haloalkenyl, (C1-C6)-alkoxy;
• (C2-C3)-alkynyl, (C2-C3)-haloalkynyl, (C1-C4)-alkyl-S(O)n;
• CHO, (C1-C4)-alkyloxycarbonyl and NH2;
• R12 is selected from the group consisting of
• halogen, cyano, isocyano, NO2;
• (C1-C6)-alkyl, (C1-C6)-haloalkyl, (C1-C6)-alkylcarbonyl, (C1-C6)-haloalkylcarbonyl, (C1-C4)-alkyloxycarbonyl, (C1-C6)-alkoxy, (C1-C3)-haloalkoxy, (C1-C4)-alkyl-S(O)n;
• (C2-C3)-alkenyl, (C2-C3)-haloalkenyl;
• (C2-C3)-alkynyl, (C2-C3)-haloalkynyl;
• NH2;
• and where the indices are as follows:
• m is 0, 1 or 2;
• n is 0, 1 or 2;
• o is 0, 1 or 2;
• p is 0 or 1;
• q is 0 or 1;
• r is 3, 4, 5 or 6;
• and
• s is 0, 1, 2, 3, 4 or 5, excluding the following compounds:
• [(4-chloro-1,5-diphenyl-1H-pyrazol-3-yl)oxy]acetic acid, {[4-chloro-5-(4-methylphenyl)-1-phenyl-1H-pyrazol-3-yl]oxy}acetic acid, {[4-chloro-5-(3-chlorophenyl)-1-phenyl-1H-pyrazol-3-yl]oxy}acetic acid, ethyl [(4-chloro-1,5-diphenyl-1H-pyrazol-3-yl)oxy]acetate, ethyl {[4-chloro-5-(4-methylphenyl)-1-phenyl-1H-pyrazol-3-yl]oxy}acetate, ethyl {[4-chloro-5-(3-chlorophenyl)-1-phenyl-1H-pyrazol-3-yl]oxy}acetate, 2-(4-chloro-1,5-diphenyl-pyrazol-3-yl)oxypropanoic acid, 2-(4-bromo-1,5-diphenylpyrazol-3-yl)oxypropanoic acid.