SUBSTITUTED 2-PHENYL-3(2H)-PYRIDAZINONES

摘要

The invention concerns substituted 2-phenyl-3(2H)-pyridazinones of formula(I), and their salts. In said formula, n = 0, 1, 2; R1 = alkyl C1-C4, alkyl halide C1-C4; R2 = H, halogen; R3 = halogen, CN; R4 = H, NO2, CN, CHO, NH-OH, alkyl C1-C4, alkyl halide C1-C4, -OR5, -CH=N-OR6, -CH=C(R7)-CO-OR8, -CO-OR9, alkyl C1-C6 -SO2-NH, di(alkylsulphonyl C1-C6)amino or (a); R5 = alkyl C1-C6, alkenyl C3-C6, alkinyl C3-C6, (alkoxy C1-C6)carbonyl-alkyl C1-C4, (alkenyloxy C3-C6)carbonyl-alkyl C1-C4, (alkinyloxy C3-C6)carbonyl-alkyl C1-C4, alkoxy C1C4-(alkoxy C1-C4) carbonyl-alkyl C1-C4; R6 = H, alkyl C1-C4, hydroxycarbonylalkyl C1-C4, (alkoxy C1-C4) carbonyl-alkyl C1-C4; R7 = H, halogen, alkyl C1C4; R8 = H, alkyl C1-C6; R9 = H, alkyl C1-C6, alkenyl C3-C6, alkinyl C3-C6, alkoxy-C1-C4-alkoxy C1-C4, hydroxycarbonyl-alkyl C1-C4, (alkoxy C1-C6)carbonyl-alkyl C1-C4, (alkenyloxy C3-C6)carbonyl-alkyl C1-C4, (alkinyloxy C3C6)carbonyl-alkyl C1-C4, alkoxy C1-C4-(alkoxy C1-C4)carbonyl-alkyl C1-C4; R10 = H, alkyl C1-C6, COOH, (alkoxy C1-C6)carbonyl. Said compounds are used as herbicides for desiccation/defoliation of plants.