摘要:
Described are herbicidal compositions which comprise as the active ingredient (a) at least one of the compounds of the general formula: wherein R is a hydrogen atom or a methyl group and (b) at least one of the compounds of the general formula wherein X is a chlorine atom or a methyl group and A is -CH₂-, or -(CH₂)₃-, and their salts and esters, and an inert carrier or diluent, which exerts a synergystically enhanced herbicidal activity.
摘要:
Herbicidal compounds are of the formula: where R¹ = C1-3 alkyl, C1-6 alkoxy which may contain an unsaturated bond, C1-2 alkylthio, C1-3 alkylcarboxy or C1-3 alkylsulfonyloxy, all of which may be halo-substituted, C1-2 alkoxy-C1-2 alkoxy, C1-3 alkoxycarbonyl, hydroxycarbonyl, -CN, aminomethyl or o-or p-CH₂OH; R² = C1-2 alkyl, C1-2 alkoxy or C1-2 alkythio all of which may be halo-substituted, or a halogen atom; and one of R¹ and R² can be hydrogen; R³ = C1-2 alkyl. Five syntheses are described, (A) from precursor where R³ is -CH₃ by reaction with R³O Metal in an inert solvent at 20-100°C for 0.5-5 hrs; (B) from R¹ is -OH by reaction with a C2-C6 (halo) olefin, in an inert solvent at 30-150°C for 1-100 hrs; (C) from R¹ is C1-3 (halo) alkylsulfonyloxy at the o- or m-position, with or without an inert solvent in presence of a base at 0-50°C for 0.5-5 hrs; (D) from R¹ is C1-C6 (unsaturated) alkoxy at o- or m-position, by reaction with an alkyl, alkenyl or alkynyl halide, in an inert solvent in presence of a base at 20-150°C for 0.5-5 hrs. (E) from R¹= C1-3 acyl by reaction with a diacyl ether, with or without an inert solvent and in presence of an acid catalyst at 0-100°C for 0.5-30 hrs. The compounds are formulated with solid or liquid carriers or diluents into herbicidal compositions and are useful for control of weeds.
摘要:
A herbicidal composition which comprises as the active ingredients (a) at lease one of compounds of the general formula: wherein R is a hydrogen atom or a methyl group and (b) at least one of 1-(2-chlorophenylsulfonyl)-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea or methyl 2-[3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonylaminosulfonyl]benzoate, and an inert carrier or diluent, which exerts a synergistically enhanced herbicidal potency.
摘要:
A herbicidal composition which comprises as the active ingredients (a) at lease one of compounds of the general formula: wherein R is a hydrogen atom or a methyl group and (b) at least one of 1-(2-chlorophenylsulfonyl)-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea or methyl 2-[3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonylaminosulfonyl]benzoate, and an inert carrier or diluent, which exerts a synergistically enhanced herbicidal potency.