| abstract |
The invention relates to 1-amino-3-benzyluracils and to their salts, which are used as herbicides for the desiccation and defoliation of plants. The compounds have the formula wherein R 1 is halogen, R 2 and R 3 are H, CN, SCH, halogen, C 1 -C 4 haloalkyl, C 1 -C 4 haloalkoxy or C 1 -C 4 haloalkylthio, R 4 is the same as R 3 and may include C 1 -C 4 alkyl, C1 -C4 alkoxy, C1 -C4 alkyl-NHCO-, R5 is H, CN, NO2, OH, halogen, optionally substituted NH2, optionally substituted C1 -C6 haloalkoxy, C1 -C6 haloalkylthio, C1 -C4 alkoxy , C 1 -C 6 alkylthio, C 3 -C 8 cycloalkoxy, C 3 -C 8 cycloalkylthio, C 3 -C 6 alkenyloxy, C 3 -C 6 alkenylthio, C 3 -C 6 alkynyloxy, C 3 -C 6 alkynylthio, C 1 -C 6 -alkyl-COO-, C 1 -C 6 -alkyl -COS-, C 3 -C 6 -alkenyl-COO-, C 3 -C 6 -alkenyl-COS, C 3 -C 6 -alkynyl-COO-, C 3 -C 6 -alkynyl-COS-, C 1 -C 6- (C 1 -C 6 -alkyl) SO 2 -O- or C 1 -C 6 -alkyl-SO 2, R 6 is H, OH, SH, halogen, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkylthio, C 1 -C 6 -alkylthio- (C 1 -C 6 -alkyl) carbonyl, (C1-C6-alkyl) iminooxy-CO2-; optionally substituted C 1 -C 6 alkoxy, C 1 -C 6 alkylthio, C 3 -C 8 cycloalkoxy, C 3 -C 8 cycloalkylthio, C 2 -C 6 alkenyloxy, C 2 -C 6 alkenylthio, C 2 -C 6 alkynyloxy, C 2 -C 6 alkynylthio, C 1 -C 6 -alkyl- C2 -C6 -alkenyl-COO-, C2 -C6 -alkenyl-COS-, C2 -C6 -alkynyl-COO-, C2 -C6 -alkynyl-COO-, C6-alkynyl-COS-, C1-C6-SO2-O-, or C1-C6-alkyl-SO2; -CY-R11 {Y = -O-, -S-, optionally substituted -NH-}, -C (R11) (Z1R12) (Z2R13) {Z1 and Z2 = -O-, -C (R11) = C (R14) -CO-R15, -CH (R11) -CH (R14) R14) -CH2-CO-R15, -C (R11) = C (R14) -C (R16) = C (R17) |