New alkynyl-substituted 3-phenylpyrrolidine-2,4-diones and use thereof as herbicides

Abstract

The present invention relates to novel effective alkynyl-substituted N-phenylpyrrolidine-2,4-diones according to the general formula (I) or agrochemically acceptable salts thereof,whereX=C1-C4-alkyl, C1-C4-haloalkyl or C3-C6-cycloalkyl, Y=C1-C4-alkyl or C3-C6-cycloalkyl, R1=hydrogen, C1-C6-alkyl, or C3-C6-cycloalkyl, R2=hydrogen or methyl, R3=C1-C6-alkyl or C1-C6-alkoxy-C2-C6-alkyl, G=hydrogen, a cleavable group L or a cation E.The invention further relates to a herbicidal composition comprising a compound of the general formula (I) and to the use of the compounds according to the invention for controlling weeds and weed grasses in crops of useful plants.

1 . A compound of formula (XI) 
       
         
           
           
               
               
           
         
         or an agrochemically acceptable salt thereof, wherein 
         R 2  is hydrogen or methyl, 
         R 3  is C 1 -C 6 -alkyl or C 1 -C 6 -alkoxy-C 2 -C 6 -alkyl, 
         R 10  is alkyl. 
       
     
     
         2 . The compound of formula (XI) according to  claim 1 , wherein
 R 3  is C 1 -C 6 -alkoxy-C 2 -C 6 -alkyl.   
     
     
         3 . The compound of formula (XI) according to  claim 2 , wherein
 R 10  is methyl or ethyl.   
     
     
         4 . The compound of formula (XI) according to  claim 2 , wherein
 R 2  is hydrogen,   R 3  is methoxyethyl,   R 10  is methyl or ethyl.   
     
     
         5 . The compound of formula (XI) according to  claim 2 , wherein
 R 2  is methyl,   R 3  is methoxyethyl,   R 10  is methyl or ethyl.   
     
     
         6 . A compound of formula (XII) 
       
         
           
           
               
               
           
         
         or an agrochemically acceptable salt thereof, wherein 
         X is C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, or C 3 -C 6 -cycloalkyl, 
         Y is C 1 -C 4 -alkyl or C 3 -C 6 -cycloalkyl, 
         R 1  is hydrogen, C 1 -C 6 -alkyl, or C 3 -C 6 -cycloalkyl. 
       
     
     
         7 . The compound of formula (XII) according to  claim 6 , wherein
 X is methyl, n- or isopropyl, n-, iso, t- or 2-butyl, C 1 -C 4 -haloalkyl or C 3 -C 6 -cycloalkyl,   Y is methyl, ethyl, n- or isopropyl, n-, iso, t- or 2-butyl or C 3 -C 6 -cycloalkyl,   R 1  is hydrogen.   
     
     
         8 . The compound of formula (XII) according to  claim 7 , wherein
 X is methyl, cyclopropyl, or trifluoromethyl,   Y is methyl, ethyl, or cyclopropyl,   R 1  is hydrogen.