| abstract |
Compounds of the formula <IMAGE> wherein R1 is hydrogen, alkyl, cycloalkyl, phenylalkyl, alkoxyalkyl, alkoxyaryl, aryl or an agronomically acceptable cation; R2 and R3 are each independently hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted phenylalkyl, carboxy, alkoxycarbonyl or phenyl group; X is hydrogen, fluoro, bromo, chloro or iodo atom; Y is a hydrogen, fluoro, bromo, chloro, iodo, alkyl, cycloalkyl, carboxy, alkoxycarbonyl, phenylalkyl, alkenyl and alkynyl group, wherein the alkyl, cycloalkyl, phenylalkyl and phenyl group may have up to three optional substituents; and B is hydrogen, carboxy, alkoxycarbonyl, methylene (-CH2R4) or CZZ1Z2 group wherein R4 is an alkyl or alkenyl group and Z, Z1 and Z2 are each independently a hydrogen, fluoro, bromo, chloro or iodo atom, provided that Z, Z1, Z2, X and Y are not all hydrogens. |