HERBICIDES

摘要

Herbicidal haloacetic acid derivatives of formula (I) and salts thereof, where: A is -N= or -CH=; X is halo; R?1 and R2¿, which may be the same or different, each represent alkyl, alkoxy, haloalkyl, haloalkoxy, halo, alkylamino or dialkylamino; R3 is -CN, -COOR?5, -CONR6R7¿, -CSNH¿2?, -CHO, -CH=Z, -CH(OAlkyl)2, -CH2OH, -CH2OR?9¿, or a substituted or unsubstituted 5- or 6-membered heterocyclic group linked via a ring carbon atom which is between two ring heteroatoms; R4 is H, or a substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aryl or aralkyl group; R5 is H, -N=CR6aR6b, or a substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl or aralkyl group; R6 is H, or a substituted or unsubstituted alkyl, alkenyl, akynyl, cycloalkyl, aryl, aralkyl or heteroaryl group; R7 is a group as defined for R6 or is -SO¿2R?8, -OH, -CN, -OR10, -NH2, or -NHR?10; or R6 and R7¿ together form a ring; R?8 is -NR6aR6b¿ or a sunstituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl, aryl or heteroaryl group; R9 is a substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl or acyl group; R10 is a group as defined for R9, or is a substituted or unsubstituted aryl or heteroaryl group; Z is =N-NR6R12 or =NOR6; R12 is a group as defined for R6, or is a substituted or unsubstituted acyl group; and R?6a and R6b¿, which may be the same or different, are each a group as defined for R6; with the proviso that, when R4 is ortho-substituted phenyl or naphthyl, any ortho-substituent thereon is halogen, -NO¿2?, -OH, -OR?10¿, -SH, -SR?8, -SOR8, -SO¿2R8, -NH2, -NR6R10, aryl or heteroaryl.