N-heteroaryl-substituted pyridine derivatives and their use as herbicides

摘要

Compounds of formula 1whereinR1 is hydrogen, fluorine, chlorine, bromine or methyl;R2 is C1-C4alkyl, C1-C4halogenalkyl, halogen, hydroxy, C1-C4alkoxy, C1-C4halogenalkoxy, nitro, amino or cyano;R3, R15 to R39 and X6 to X19 are as defined in claim 1, and the agrochemically acceptable salts and stereoisomers of these compounds of formula I are suitable for use as herbicides.