| abstract |
3-Aryluracils (I) and their salts (with A = hydrogen) where: A = H, CH3, NH2; R1 = H, halogen; R2 = H, halogen, C¿1?-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkylthio, C1-C6-alkylsulfenyl or C1-C6-alkylsulfonyl; R?3¿ = H, halogen, C¿1?-C6-alkyl; X = oxygen or -N(R?7¿)-, with R7 = C1-C6-alkyl, C3-C6-alkenyl, C3-C6-alkynyl, C1-C6-alkylcarbonyl or C1-C6-alkoxy-C1-C6-alkyl; Y?1 and Y2¿ = oxygen or sulfur; Z = oxygen or -N(R?8)-; R5, R6 and R8¿ = H, C¿1?-C6-alkyl, C3-C6-alkenyl, C3-C6-alkynyl or C1-C6-alkoxy-C1-C6-alkyl; or R?6 and R8¿ together are a second chemical bond; R4 = H, C¿1?-C6-alkyl, C3-C8-cycloalkyl, C1-C6-haloalkyl, C3-C6-alkenyl, C3-C6-alkynyl, C1-C6-alkylcarbonyl, C3-C6-alkenyl-carbonyl, C3-C6-alkynylcarbonyl or C1-C6-alkylsulfonyl, where each of the last-mentioned 9 radicals can carry 1-3 substituents: R?9¿ = H, C¿1?-C6-alkyl, C3-C8-cycloalkyl, C3-C6-alkenyl, C3-C6-alkynyl, C1-C6-alkoxy-C1-C6-alkyl, (C1-C6-alkoxy)carbonyl-C1-C6-alkyl, unsubst. or subst. phenyl or phenyl-C1-C6-alkyl; R?10¿ = H, OH, C¿1?-C6-alkyl, C3-C8-cycloalkyl, C1-C6-alkoxy, C3-C6-alkenyloxy, C1-C6-alkoxycarbonyl-C1-C6-alkoxy; R?11 = C¿1-C6alkoxy, C3-C6-alkenyloxy, C1-C6-alkoxycarbonyl-C1-C6alkoxy; R12 = C1-C6-alkyl, C3-C6-alkenyl, C1-C6-alkoxycarbonyl-C1-C6-alkyl. Use: as herbicides; for the desiccation/defoliation of plants. |