| abstract |
The disclosure relates to phenyl diketone derivatives of formula I in which the substituents have the following meanings: L, M - hydrogen, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkinyl, C1-C4 alkoxy (these groups being optionally substituted by one to five halogen atoms or C1-C4 alkoxy), halogen, cyano, nitro, a -(A)m-S(O)nR1 group or a -(A)¿m-CO-R?2 group; Y - a group consisting of C=O, C=N-R?3, CR7-NR5R6, CR7-OR8, CR10R11, CR7-OR8¿, hydrogen- or C¿1?-C4-alkyl-substituted 1,3-dioxanyl or 1,3-dioxolanyl, a heteroatom selected from the group comprising oxygen, sulphur and nitrogen; X consists of a chain (-CR?12R13¿-), (-CR?12R13-CR21R22¿-), (-CR?12=CR13-), (CR12R13-CR12=CR13¿-), or NR23; the bond between X and Y can be saturated or unsaturated; A - O, NR14; m is 0 or 1; n is 0, 1 or 2; R15 is cyclopropyl, 1-methylcyclopropyl; 1-méthylthiocyclopropyl or tert. butyl; when Y = C=O, X is different from NR?23. R1 to R14 and R16 to R23¿ have the meanings indicated in claim 1. Also disclosed are processes for producing these phenyl diketone derivatives, agents containing them and the use of the derivatives or agents containing them for weed control. |