| 摘要 |
<p>Herbicidal acetic acid derivatives of formula (I) where: R is a group -CO2R1, -CH2OH, -CONHSO2Ra or -CONHSO¿2NR?aRb, where R1 is hydrogen or a salt- or ester-forming group, Ra is alkyl or aryl, and Rb is hydrogen, alkyl or aryl; R?2 and R3¿, which may be the same or different, are each halogen, alkyl, alkoxy, alkylthio, alkylamino or dialkylamino; A is a substituted or unsubstituted aryl, heterocyclyl or benzoheterocyclyl group, or a substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl group; X is oxygen or sulfur; Y is -CH= or -N=; and Z is oxygen or sulfur; and salts thereof, herbicidal compositions containing them, processes for their preparation, and methods of using them.</p> |
