3-Keto- or 3- oxime-ether-substituted benzoylcyclohexanediones

1. A compound of the formula (I) or a salt thereof

where the radicals and indices are as defined below:

X 1 is a divalent unit selected from the group consisting of O, S(O) n , N—H, and N—R 2 ;

X 2 is a straight-chain or branched (C 1 -C 6 )-alkylene, (C 2 -C 6 )-alkenylene or (C 2 -C 6 )-alkynylene chain which is substituted by w radicals selected from the group consisting of halogen, cyano and NO 2 and by v radicals R 2 ;

X 3 is oxygen, sulfur or NOR 3 ;

R 1a , R 1b and R 1c independently of one another are H, mercapto, NO 2 , halogen, cyano, thiocyanato, (C 1 -C 6 )-alkyl-CO—O, (C 1 -C 6 )-alkyl-S(O) n —O, (C 1 -C 6 )-alkyl-S(O) n , (C 1 -C 6 )-haloalkyl-S(O) n , (C 3 -C 7 )-cycloalkyl-S(O) n , di-(C 1 -C 6 )-alkyl-N—SO 2 , (C 1 -C 6 )-alkyl-SO 2 —NH, (C 1 -C 6 )-alkyl-NH—CO, di-(C 1 -C 6 )-alkyl-N—CO, (C 1 -C 6 )-alkyl-SO 2 -(C 1 -C 6 )-alkyl-NH, (C 1 -C 6 )-alkyl-CO—(C 1 -C 6 )-alkyl-NH, (C 1 -C 6 )-alkyl-O—CH 2 , (C 1 -C 6 )-alkyl-S(O) n —CH 2 , (C 1 -C 6 )-alkyl-NH—CH 2 , 1,2,4-triazol-1-yl, 1,2,4-triazol-1-yl-CH 2 , (C 1 -C 6 )-alkyl-(D) p , (C 2 -C 6 )-alkenyl-(D) p , (C 2 -C 6 )-alkynyl-(D) p , (C 3 -C 9 )-cycloalkyl-(D) p , (C 3 -C 9 )-cycloalkenyl-(D) p , (C 1 -C 6 )-alkyl-cycloalkyl-(D) p , or (C 1 -C 6 )-alkyl-cycloalkenyl-(D) p , each of which is substituted by v radicals selected from the group consisting of CN, NO 2 and halogen;

D is oxygen or sulfur;

R 2 , R 3 independently of one another are hydrogen, (C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkenyl, (C 2 -C 6 )-alkynyl, (C 3 -C 9 )-cycloalkyl, (C 3 -C 9 )-cycloalkenyl, (C 1 -C 6 )-alkyl-(C 3 -C 9 )-cycloalkyl, (C 1 -C 6 )-alkyl-(C 3 -C 9 )-cycloalkenyl, (C 2 -C 6 )-alkenyl-(C 3 -C 9 )-cycloalkyl, (C 2 -C 6 )-alkenyl-(C 3 -C 9 )-cycloalkenyl, (C 2 -C 6 )-alkynyl-(C 3 -C 9 )-cycloalkyl, (C 2 -C 6 )-alkynyl-(C 3 -C 9 )-cycloalkenyl or straight-chain or branched [C(R 6 ) 2] z —[OC(R 6 ) 2 ] w -[O—C(R 6 ) 2 ] x -R 6 , each of which is substituted by v radicals selected from the group consisting of CN, NO 2 and halogen,

aryl, (C 1 -C 6 )-alkyl-aryl, (C 2 -C 6 )-alkenyl-aryl, (C 2 -C 6 )-alkynyl-aryl, heterocyclyl or heteroaryl, each of which is substituted by v radicals selected from the group consisting of CN, NO 2 , halogen, (C 1 -C 6 )-alkyl-(D) p and halo-(C 1 -C 6 )-alkyl-(D) p ;

R 4 is OR 7 , (C 1 -C 4 )-alkylthio, halo-(C 1 -C 4 )-alkylthio, (C 2 -C 4 )-alkenylthio, halo-(C 2 -C 4 )-alkenylthio, (C 2 -C 4 )-alkynylthio, halo-(C 2 -C 4 )-alkynylthio, (C 1 -C 4 )-alkyl-SO, halo-(C 1 -C 4 )-alkyl-SO, (C 2 -C 4 )-alkenyl-SO, halo-(C 2 -C 4 )-alkenyl-SO, (C 2 -C 4 )-alkynyl-SO, halo-(C 2 -C 4 )-alkynyl-SO, (C 1 -C 4 )-alkyl-SO 2 , halo-(C 1 -C 4 )-alkyl-SO 2 , (C 2 -C 4 )-alkenyl-SO 2 , halo-(C 2 -C 4 )-alkenyl-SO 2 , (C 2 -C 4 )-alkynyl-SO 2 , halo-(C 2 -C 4 )-alkynyl-SO 2 , halogen, CN, cyanato, thiocyanato or phenylthio;

R 5 is hydrogen,

tetrahydropyran-3-yl, tetrahydropyran-4-yl, tetrahydrothiopyran-3-yl, (C 1 -C 4 )-alkyl, (C 1 -C 8 )-cycloalkyl, (C 1 -C 4 )-alkoxy, (C 1 -C 4 )-alkoxy-(C 1 -C 4 )-alkyl, (C 1 -C 4 )-alkoxy-CO, (C 1 -C 4 )-alkylthio or phenyl, each of which is substituted by v radicals selected from the group consisting of halogen, (C 1 -C 4 -alkylthio and (C 1 -C 4 )-alkoxy, or two radicals R 5 attached to a common carbon atom form a chain selected from the group consisting of OCH 2 CH 2 O, OCH 2 CH 2 CH 2 O, SCH 2 CH 2 S and SCH 2 CH 2 CH 2 S, which is substituted by w methylene groups, or

two radicals R 5 attached to directly adjacent carbon atoms form, together with the carbon atoms carrying them, a 3- to 6-membered ring substituted by w radicals selected from the group consisting of halogen, (C 1 -C 4 )-alkyl, (C 1 -C 4 )-alkylthio and (C 1 -C 4 )-alkoxy;

R 6 is H, halogen, CN, NO 2 , (C 1 -C 4 )-alkyl or halo-(C 1 -C 4 -alkyl;

R 7 is H, (C 1 -C 4 )-alkyl, halo-(C 1 -C 4 )-alkyl, (C 1 -C 4 )-alkoxy-(C 1 -C 4 )-alkyl, CHO, (C 1 -C 4 )-alkyl-CO, (C 1 -C 4 )-alkoxy-CO, (C 1 -C 4 )-alkyl-NH—CO, di-(C 1 -C 4 )-alkyl-N—CO, (C 1 -C 4 )-alkyl-SO 2 , halo-(C 1 -C 4 )-alkyl-SO 2 , is benzoyl or phenyl-SO 2 , each of which is substituted by v radicals selected from the group consisting of (C 1 -C 4 -alkyl, halo-(C 1 -C 4 )-alkyl, (C 1 -C 4 )-alkoxy, halo-(C 1 -C 4 )-alkoxy, halogen, CN and NO 2 ;

Y is a divalent unit selected from the group consisting of 0, S, N—H, (C 1 -C 6 )-alkyl-N, CHR 5 and C(R 5 ) 2 ;

Z is a direct bond or a divalent unit selected from the group consisting of O, S, SO, SO 2 , N—H, (C 1 -C 6 )-alkyl-N, CHR 6 and C(R 6 ) 2 ;

m and n are each independently of one another 0, 1 or 2;

p is independently of the other p 0 or 1;

v is 0, 1, 2 or 3;

w and x are each independently of one another 0, 1, 2, 3 or 4;

z is 1, 2, 3 or 4,

where w and x are not simultaneously zero.

2. A compound as claimed in claim 1 , in which R 2 , R 3 are independently of one another hydrogen,

(C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkenyl, (C 2 -C 6 )-alkynyl, (C 3 -C 9 )-cycloalkyl, (C 3 -C 9 )-cycloalkenyl, (C 1 -C 6 )-alkyl-(C 3 -C 9 )-cycloalkyl, (C 1 -C 6 )-alkyl-(C 3 -C 9 )-cycloalkenyl, (C 2 -C 6 )-alkenyl-(C 3 -C 9 )-cycloalkyl, (C 2 -C 6 )-alkenyl-(C 3 -C 9 )-cycloalkenyl, (C 2 -C 6 )-alkynyl-(C 3 -C 9 )-cycloalkyl, (C 2 -C 6 )-alkynyl-(C 3 -C 9 )-cycloalkenyl or straight-chain or branched [C(R 6 ) 2 ] z —[OC(R 6 ) 2 ] w —[O—C(R 6 ) 2 ] x —R 6 , each of which is substituted by v radicals selected from the group consisting of CN, NO 2 and halogen,

aryl, (C 1 -C 6 )-alkyl-aryl, (C 2 -C 6 )-alkenyl-aryl or (C 2 -C 6 )-alkynyl-aryl, each of which is substituted by v radicals selected from the group consisting of CN, NO 2 , halogen, (C 1 -C 6 )-alkyl-(D) p and halo-(C 1 -C 6 )-alkyl-(D) p ;

X 3 is oxygen or NOR 3 , and

R 1c is hydrogen.

3. The compound as claimed in claim 1 , in which

X 1 is oxygen or S(O) n ;

R 1a , R 1b are independently of one another F, Cl, Br, NO 2 , CF 3 , CH 3 , CH 3 S, CH 3 O, CH 3 SO 2 , EtSO 2 , CF 3 CH 2 SO 2 or cyclopropyl-SO 2 , and

R 2 , R 3 are independently of one another hydrogen, (C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkenyl, (C 2 -C 6 )-alkynyl, (C 3 -C 9 )-cycloalkyl, (C 1 -C 6 )-alkyl-(C 3 -C 9 )-cycloalkyl, straight-chain or branched [C(R 6 ) 2 ] z —[OC(R 6 ) 2 ] w —[O—C(R 6 ) 2 ] x —R 6 , each of which is substituted by v radicals selected from the group consisting of CN, NO 2 and halogen, aryl or (C 1 -C 6 )-alkyl-aryl, each of which is substituted by v radicals selected from the group consisting of CN, NO 2 , halogen, (C 1 -C 6 )-alkyl-(D) p and halo-(C 1 -C 6 )-alkyl-(D) p .

4. The compound as claimed in claim 1 , in which

X 1 is oxygen and

R 4 is OR 7 , (C 1 -C 4 )-alkylthio, (C 2 -C 4 )-alkenylthio, (C 1 -C 4 )-alkyl-SO 2 , halogen, CN, cyanato, thiocyanato or phenylthio.

5. The compound as claimed in claim 1 , in which R 5 is hydrogen or (C 1 -C 4 )-alkylthio.

6. The compound as claimed in claim 1 , in which

R 4 is OR 7 ;

D is oxygen;

Y, Z are each CH 2 ;

v, w and x are each independently of one another 0, 1 or 2;

z is 1 or 2.

7. The compound as claimed in claim 1 which is not present as a salt.

8. A herbicidal composition which comprises a herbicidally effective amount of at least one compound of the formula (I) as claimed in claim 1 .

9. The herbicidal composition as claimed in claim 8 in a mixture with formulation auxiliaries.

10. A method for controlling unwanted plants which comprises applying an effective amount of at least one compound of the formula (I) as claimed in claim 1 to the plants or to the location of the unwanted plants.

11. The method as claimed in claim 10 , wherein the unwanted plants are located in crops of useful plants and the at least one compound of the formula (I) is applied to both the unwanted plants are transgenic useful plants.

12. The method as claimed in claim 11 , wherein the useful plants are transgenic useful plants.

13. A method for controlling unwanted plants which comprises applying an effective amount of a herbicidal composition as claimed in claim 8 to the plants or to the location of the unwanted plants.

14. A method for controlling unwanted plants which comprises applying an effective amount of a herbicidal composition as claimed in claim 9 to the plants or to the location of the unwanted plants.

15. The method as claimed in claim 13 , wherein the unwanted plants are located in crops of useful plants and the herbicidal composition is applied to both the unwanted plants and the useful plants.

16. A method as claimed in claim 15 , wherein the useful plants are transgenic useful plants.