Neue 3-(4-Cyanophenyl)uracile

摘要

The invention concerns 3-(4-cyanophenyl)uracils of formula (I), wherein A = H, CH3, NH2; Y = -O-, -S-; R<1> = H, halogen; R<2> = H, halogen, C1-C6-alkyl, C1-C6-alkyl halide, C1-C6-alkylthio, C1-C6-alkylsulphenyl, C1-C6-alkylsulphonyl; R<3> = H, halogen, C1-C6-alkyl; R<4> = H, C1-C6-alkyl halide, C1-C6-alkyl, C3-C8-cycloalkyl, C3-C6-alkenyl, C3-C6-alkinyl, (C1-C6-alkyl)carbonyl, (C3-C6-alkenyl)carbonyl, (C3-C6-alkinyl)carbonyl or alkylsulphonyl, each of the last-mentioned eight groups being able to carry one to three substituents: halogen, nitro, cyano, hydroxy, C3-C8-cycloalkyl, C1-C6-alkoxy, C3-C8-cycloalkoxy, C3-C6-alkenyloxy, C3-C6-alkinyloxy, C1-C6-alkoxy-C1-C6-alkoxy, C1-C6-alkylthio, C1-C6-alkylsulphenyl, C1-C6-alkylsulphonyl, C1-C6-alkylidene aminoxy, optionally substituted phenyl, phenoxy or phenylsulphonyl, an optionally substituted 3 to 7-member heterocyclyl or heterocyclyloxy group with one to three heteroatoms, -CO-XR<5>, -OCO-XR<5> or -N(R<5>)R<6>, wherein X = chemical bond, oxygen, sulphur or -N(R<6>)-; R<5> = H, C1-C6-alkyl, C3-C8-cycloalkyl, C3-C6-alkenyl, C3-C6-alkinyl, C1-C6-alkoxy-C1-C6-alkyl, (C1-C6-alkoxy)carbonyl-C1-C6-alkyl, optionally substituted phenyl or phenyl-C1-C6-alkyl; or X and R<5> together equal a 3 to 7-member heterocyclic ring which is bonded via nitrogen, has one to three heteroatoms and can optionally carry one to three substituents; R<6> = H, OH, C1-C6-alkyl, C3-C8-cycloalkyl or C1-C6-alkoxy, and the salts of I when A = hydrogen. The products are used as herbicides, for desiccating and defoliating plants.