Specifically substituted 3-(2-alkoxy-6-alkyl-4-propinylphenyl)-3-pyrrolin-2-ones and their use as herbicides

3-Phenylpyrrolin-2-one of formula (I) or an agrochemically acceptable salt thereof,

• wherein
• X represents C1-C6-alkoxy or C1-C6-haloalkoxy,
• Y represents C1-C6-alkyl, C1-C6-haloalkyl or C3-C6-cycloalkyl,
• R1 represents C3-C6-alkoxy, C1-C4-alkoxy-C1-C4-alkyl, C3-C6-cycloalkyl, C1-C6-haloalkyl, C2-C6-alkenyloxy or C2-C6-haloalkenyloxy,
• R2 represents hydrogen, C1-C6-alkyl, C1-C4-alkoxy-C2-C4-alkyl, C1-C6-haloalkyl, C3-C6-cycloalkyl, C2-C6-alkenyl, C2-C6-alkynyl, C1-C6-alkoxy or C1-C6-haloalkoxy,
• G represents hydrogen, a leaving group L or a cation E, where
• L represents one of the radicals below
• in which
• R3 represents C1-C4-alkyl or C1-C3-alkoxy-C1-C4-alkyl,
• R4 represents C1-C4-alkyl,
• R5 represents C1-C4-alkyl, unsubstituted phenyl or phenyl which is mono- or polysubstituted by halogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4-alkoxy, C1-C4-haloalkoxy, nitro or cyano,
• R6, R6′ independently of one another represents methoxy or ethoxy,
• R7, R8 each independently of one another represents methyl, ethyl, phenyl or together form a saturated 5-, 6- or 7-membered ring, wherein a ring carbon atom may optionally be replaced by an oxygen or sulfur atom,
• E represents an alkali metal ion, an ion equivalent of an alkaline earth metal, an ion equivalent of aluminium, an ion equivalent of a transition metal, a magnesium halogen cation, or an ammonium ion in which optionally one, two, three or all four hydrogen atoms are replaced by identical or different radicals from the groups C1-C10-alkyl or C3-C7-cycloalkyl which may each independently of one another be mono- or polysubstituted by fluorine, chlorine, bromine, cyano, hydroxy or interrupted by one or more oxygen or sulfur atoms, represents a cyclic secondary or tertiary aliphatic or heteroaliphatic ammonium ion, for example morpholinium, thiomorpholinium, piperidinium, pyrrolidinium, or in each case protonated 1,4-diazabicyclo[1.1.2]octane (DABCO) or 1,5-diazabicyclo[4.3.0]undec-7-ene (DBU), represents a heteroaromatic ammonium cation, for example in each case protonated pyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 2,4-dimethylpyridine, 2,5-dimethylpyridine, 2,6-dimethylpyridine, 5-ethyl-2-methylpyridine, collidine, pyrrole, imidazole, quinoline, quinoxaline, 1,2-dimethylimidazole, 1,3-dimethylimidazolium methylsulfate or furthermore also represents a trimethylsulfonium ion.