NOVEL SUBSTITUTED PYRIDAZINONES

摘要

The invention relates to substituted pyridazinones of formula (I) and the salts thereof, whereby R<1>-R<3> represent H, NO2, OH, halogen, C1-C6 alkoxyl, C1-C6 haloalkoxyl, SH, C1-C6 alkylthio, C1-C6 haloalkylthio, NH2, C1-C6 alkylamino, Di(C1-C6 alkyl)amino, CN, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkyl sulfinyl, C1-C6 haloalkyl sulfinyl, C1-C6 alkyl sulfonyl, C1-C6 haloalkyl sulfonyl; R<4>, R<5> represent H or, together with the carbon atom on which they are bonded, CO; R<6> represents H, NO2, halogen; R<7> represents H, NO2, halogen, COOH, C1-C6 alkoxyl, C1-C6 alkoxyl-CO, C1-C6 alkoxyl-CO-(C1-C6 alkoxyl)-CO; R<8> represents H, NO2, optionally substituted OH; R<20> represents H, halogen for R<8> = H or NO2; halogen for R<8> = optionally substituted OH; and R<21> represents H, halogen. The novel substituted pyridazinones can be used as herbicides for the desiccation/defoliation of plants.