Triazolopyridazines, methods for their preparation, their use as herbicides and intermediates.

摘要

Herbicides of formula (I) <IMAGE> in which X denotes a halogen, a group R<1>, alkoxy or a hydrogen atom; Y and Z independently denote hydrogen, a halogen, an R<1>, -OR<1>, -SR<1>, -NR<2>R<3> or cyano group; Ar denotes an optionally substituted phenyl group or a penta- or hexagonal heterocyclic ring containing one or more heteroatoms chosen from O, S and N, which is optionally substituted, R<1> is a straight-chain or branched alkyl group; R<2> and R<3> independently denote a hydrogen atom or a straight-chain or branched alkyl group; R<4> denotes an optionally substituted phenyl group; R<5> denotes a penta- or hexagonal heterocyclic ring containing one or more heteroatoms O, S or N; m has the value of zero, 1 or 2; and their agriculturally acceptable salts. The invention also relates to the herbicidal compositions containing the product of formula (I). Application: methods of combating weeds by means of the compounds of formula (I) or of compositions containing them.