| abstract |
Substituted 2-phenyl-3(2H)-pyridazinones Iand salts thereof, wheren=0, 1, 2; R1=C1-C4-alkyl, C1-C4-haloalkyl;R2=H, halogen; R3=halogen, CN;R4=H, NO2, CN, CHO, NH-OH, C1-C4-alkyl, C1-C4-halogenalkyl, -OR5, -CH=N-OR6, -CH=C(R7)-CO-OR8, -CO-OR9, C1-C6-alkyl-SO2-NH, di(C1-C6-alkylsulfonyl)amino orR5=C1-C6-alkyl, C3-C6-alkenyl, C3-C6-alkynyl, (C1-C6-alkoxy)carbonyl-C1-C4-alkyl, (C3-C6-alkenyloxy)carbonyl-C1-C4-alkyl, (C3-C6-alkynyloxy)carbonyl-C1-C4-alkyl, C1-C4-alkoxy(C1-C4-alkoxy)carbonyl-C1-C4-alkyl;R6=H, C1-C4-alkyl, hydroxycarbonyl-C1-C4-alkyl, (C1-C4-alkoxy)carbonyl-C1-C4-alkyl;R7=H, halogen, C1-C4-alkyl; R8=H, C1-C6-alkyl;R9=H, C1-C6-alkyl, C3-C6-alkenyl, C3-C6-alkynyl, C1-C4-alkoxy-C1-C4-alkoxy, hydroxycarbonyl-C1-C4-alkyl, (C1-C6-alkoxy)carbonyl-C1-C4-alkyl, (C3-C6-alkenyloxy)carbonyl-C1-C4-alkyl, (C3-C6-alkynyloxy)carbonyl-C1-C4-alkyl, C1-C4-alkoxy-(C1-C4-alkoxy)carbonyl-C1-C4-alkyl;R10=H, C1-C6-alkyl, COOH, (C1-C6-alkoxy)carbonyl;and their use as herbicides and for the desiccation/defoliation of plants are described. |