| 摘要 |
The invention relates to piperazine compounds of the following defined general formula (I) and to their use as herbicides. The invention also relates to crop protection agents and to a method for combating undesired plant growth. In formula (I), the variables are defined as follows: Ris selected from halogen, cyano, nitro, Z-C(=O)-R, phenyl and a 5-or 6-membered heterocyclic group that has 1, 2, 3 or 4 heteroatoms, selected from O, N and S as ring atoms, wherein phenyl and the heterocyclic group are unsubstituted or have 1, 2, 3 or 4 substituents R; Z stands for a covalent bond or a CHgroup; Rrepresents hydrogen, C-Calkyl, C-Ccycloalkyl, C-Calkenyl, C-Ccycloalkenyl, C-Calkynyl and similar; Rrepresents hydrogen, halogen, nitro, cyano, C-Calkyl, C-Chaloalkyl, C-Calkenyl, C-Calkoxy, C-Chaloalkoxy, benzyl or a group S(O) nR, wherein Rstands for C-Calkyl or C-Chaloalkyl and n stands for 0, 1 or 2; Rrepresents hydrogen or halogen; Rrepresents C-Calkyl, C-Calkenyl or C-Calkynyl; Rrepresents hydrogen, C-Calkyl, C-Calkenyl, C-Calkynyl or a group (=O)R, wherein Rstands for hydrogen, C-Calkyl, C-Chaloalkyl, C-Calkoxy or C-Chaloalkoxy; Rstands for C-Calkyl, C-Chydroxy alkyl or C-Chaloalkyl; R, Rstand, independently of one another, for hydrogen, OH, C-Calkoxy, C-Chaloalkyoxy, C-Calkyl or C-Chaloalkyl; R, Rare selected, independently of one another, from hydrogen, halogen, CN, NO2, C-Calkyl, C-Chaloalkyl, C-Calkenyl, C-Calkoxy and C-Chaloalkoxy.
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