HERBICIDALLY ACTIVE CYCLIC DIONE COMPOUNDS, OR DERIVATIVES THEREOF, SUBSTITUTED BY A PHENYL WHICH HAS AN ALKYNYL-CONTAINING SUBSTITUENT

摘要

The present invention relates to a compound of formula (I), wherein: X is methyl or chlorine; R1 is methyl or chlorine; R2 is hydrogen, methyl, ethyl, n-propyl, cyclopropyl, vinyl, ethynyl, fluorine, chlorine, bromine, C1-C3alkoxy, C1-C2-fluoroalkoxy, C1-C2alkoxy-C1-C3alkoxy- or C1fluoroalkoxy-C1-C3alkoxy-; and Y is O, S, S(O), S(O)2, N(C1-C2alkyl), N(C1-C2alkoxy), C(O), CR8R9 or —CR10R11CR12R13—; and G, R3, R4, R5 and R6 are as defined herein; wherein the compound of formula (I) is optionally present as an agrochemically acceptable salt thereof. These compounds are suitable for use as herbicides. The invention therefore also relates to a method of controlling weeds, especially grassy monocotyledonous weeds, in crops of useful plants, comprising applying a compound of formula (I), or a herbicidal composition comprising such a compound, to the plants or to the locus thereof.