'2 - phenyl - 3 (2h) - substituted pyridazinone, process for its preparation and use, herbicidal compositions, for desiccation and / or defoliation of plants, and, processes for the preparation of herbicidally active compositions, for the preparation of compositions that have a desiccant and / or defoliating action, to control unwanted vegetation, and for the desiccation and / or defoliation of plants. '

摘要

"2-FENIL-3 (2H) -PIRIDAZINONE SUBSTITUADA, PROCESS FOR ITS PREPARATION AND USE, HERBICIDE COMPOSITIONS, FOR DESICCATION AND / OR DEPLOYMENT OF PLANTS, AND PROCESSES FOR THE PREPARATION OF HOSPITAL COMPOSITIONS COMPOSITIONS THAT HAVE DESICCANT AND / OR DEFOLIATING ACTION, TO CONTROL UNWANTED VEGETATION, AND FOR THE DESICCATION AND / OR DEPLOYMENT OF PLANTS ". This invention relates to substituted 2-phenyl-3 (2H) -pyridazinones of formula (I), and their salts. In said formula, n = 0, 1.2; R¹ = C ~ 1 ~ -C ~ 4 ~ alkyl, C ~ 1 ~ -C ~ 4 ~ alkyl halide; R² = H, halogen; R³ = halogen, CN; R ^ 4 ^ = H, NO2, CN, CHO, NH-OH, C ~ 1 ~ -C ~ 4 ~ alkyl, C ~ 1 ~ -C ~ 4 ~ alkyl halide, -OR ^ 5 ^ = -CH = N-OR ^ 6 ^, -CH = C (R ^ 7 ^) - CO-OR ^ 8 ^, -CO-OR ^ 9 ^, C ~ 1 ~ -C ~ 6 ~ -SO ~ 2 ~ -NH alkyl , di (C ~ 1 -C ~ 6 ~ alkylsulfonyl) amino or (a); R ^ 5 ^ = C ~ 1 ~ -C ~ 6 ~ alkyl, C ~ 3 ~ -C ~ 6 ~ alkenyl, C ~ 3 ~ -C ~ 6 ~ alkynyl (C ~ 1 ~ -C ~ 6 ~ alkoxy) carbonyl-C ~ 1 ~ -C ~ 4 ~ alkyl (C ~ 3 ~ -C ~ 6 ~ alkenyloxy) C ~ 1 ~ -C ~ 4 ~ carbonyl-alkyl (C ~ 3 ~ -C ~ 6 ~ alkynyloxy) carbonyl-C ~ 1 ~ -C ~ 4 ~ alkyl, C ~ 1 ~ -C ~ 4 ~ alkoxy (C ~ 1 ~ -C ~ 4 ~ alkoxy) C ~ 1 ~ -C ~ 4 ~ alkoxy; R ^ 6 ^ = H, C ~ 1 ~ -C ~ 4 ~ alkyl, hydroxycarbonyl-C ~ 1 ~ -C ~ 4 ~ alkyl, (C ~ 1 ~ -C ~ 4 ~ alkoxy) carbon ~ C ~ 1 ~ alkyl -C ~ 4 ~; R ^ 7 ^ = H, halogen, C ~ 1 ~ -C ~ 4 ~ alkyl; R 8 8 = H, C ~ 1 ~ -C ~ 6 ~ alkyl; R ^ 9 ^ = H, C ~ 1 ~ -C ~ 6 ~ alkyl, C ~ 3 ~ -C ~ 6 ~ alkenyl, C ~ 3 ~ -C ~ 6 ~ alkynyl, C ~ 1 ~ -C ~ 4 ~ alkoxy -C ~ 1 ~ -C ~ 4 ~ alkoxy, hydroxycarbonyl-C ~ 1 ~ -C ~ 4 ~ alkyl, (C ~ 1 ~ -C ~ 6 ~ alkoxy) C ~ 1 ~ -C ~ 4 ~ alkoxy, (C ~ 3 ~ -C ~ 6 ~ alkenyloxy) C ~ 1 ~ -C ~ 4 ~ carbonyl-alkyl (C ~ 3 ~ -C ~ 6 ~ alkynyloxy) C ~ 1 ~ -C ~ 4 ~ alkylyl, alkoxy C ~ 1 ~ -C ~ 4 ~ (C ~ 1 ~ -C ~ 4 ~ alkoxy) C ~ 1 ~ -C ~ 4 ~ alkoxy; R 10 10 = H, C ~ 1 ~ -C ~ 6 ~ alkyl, COOH, (C ~ 1 ~ -C ~ 6 ~ alkoxy) carbonyl. Such compounds are used as herbicides for the desiccation / defoliation of plants.