HERBICIDAL COMPOSITIONS AND METHODS OF COMBATING UNCRAFT

摘要

Herbicidal compounds of the formula: IMAGE II wherein A represents R1R2N- (wherein R1 represents C1-8 alkyl or C2-8 alkenyl or alkynyl unsubstituted or substituted by CN, OH, C1-6 alkoxy, carboxy, C2-9 alkoxycarbonyl, aminocarbonyl optionally substituted by C1-8 alkyl or C2-8 alkenyl, C1-8 alkoxyaminocarbonyl, C1-8 alkanesulphonamidocarbonyl, -C(=O)Het, where Het represents a nitrogen-containing heterocyclic group, or one or more halogen atoms or R1 represents C3-6 cycloalkyl optionally substituted by C1-4 alkyl and R2 represents H or R1, or R1 represents C1-4 alkylthio and R2 represents H, or A represents Rp(Rq)-C=N- (wherein Rp represents C1-4 alkoxy or amino substituted by one or two C1-4 alkyl groups and Rq represents H or C1-4 alkyl) or A represents 2-oxo-azetidin-1-yl, 2-oxo-pyrrolidin-1-yl or 2-oxo-piperidin-1-yl optionally substituted by C1-6 alkyl or A represents open-chain alkenylcarbonylamino and B represents phenyl substituted in the 2- position by F, Cl, Br, NO2, Me or Et and in the 4- position by F, Cl, Br, C1-4 (optionally substituted by halogen) or C2-4 alkenyl and alkynyl and optionally substituted in the 3-, 5- and 6- positions by F, Cl, Br, NO2, Me or Et, or B represents 2,3-dichlorophenyl, and salts thereof.