Herbicidal compounds

1. A compound of formula (I),

or a salt or N-oxide thereof, wherein,

A 2 is CR 10a R 10b or NR 11 ;

A 3 is C(O) or S(O) 2 ;

A 4 is CR 1 , N(R 13 ) n , O or S;

A 5 is CR 2 , N(R 14 ) n , O or S;

n is an integer of 0 or 1;

R 1 is independently hydrogen, halogen, nitro, cyano, or independently selected from the group consisting of: C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 1 -C 6 alkoxy C 1 -C 6 alkylthio, C 1 -C 6 alkylsulfinyl, C 1 -C 6 alkylsulfonyl, C 3 -C 6 cycloalkyl, C 1 -C 6 alkoxy-C 1 -C 6 alkyl-, C 1 -C 6 alkoxy-C 1 -C 6 alkoxy-, di-C 1 -C 6 alkoxy-C 1 -C 6 alkyl, and C 1 -C 6 alkylthio-C 1 -C 6 alkyl, each of which is optionally substituted by 1-3 halogen atoms;

R 2 is hydrogen, halogen, methyl or C 1 haloalkyl;

R 10a and R 10b are each independently hydrogen, halogen, cyano, C 1 -C 8 alkyl, C 1 -C 8 alkoxy-C 1 -C 4 alkyl-, C 1 -C 8 haloalkyl, C 2 -C 8 alkenyl, C 2 -C 8 haloalkenyl, C 2 -C 8 alkynyl, C 2 -C 8 haloalkynyl, C 3 -C 10 cycloalkyl, C 3 -C 10 cycloalkyl-C 1 -C 4 alkyl-, heterocyclyl, heterocyclyl-C 1 -C 4 alkyl-, or C 1 -C 8 alkoxycarbonyl-; or R 10a and R 10b together with the carbon atom they are attached to join to form a 3- to 10-membered carbocyclic ring or a 4- to 1 0-membered heterocyclic ring;

R 11 is hydrogen, C 1 -C 10 alkyl, C 1 -C 4 haloalkyl, C 2 -C 10 alkenyl, C 2 -C 4 haloalkenyl, C 2 -C 10 alkynyl, C 2 -C 4 haloalkynyl, C 3 -C 10 cycloalkyl, C 3 -C 10 cycloalkyl-C 1 -C 6 alkyl-, C 1 -C 10 alkoxy-C 1 -C 6 alkyl-, C 1 -C 10 cyanoalkyl-, C 1 -C 10 alkoxycarbonyl-C 1 -C 6 alkyl-, N—C 1 -C 3 alkyl-aminocarbonyl-C 1 -C 6 alkyl-, N,N-di-(C 1 -C 3 alkyl)-aminocarbonyl-C 1 -C 6 alkyl-, aryl-C 1 -C 6 alkyl- or aryl-C 1 -C 6 alkyl- wherein the aryl moiety is substituted by one to three R 12 , or heterocyclyl-C 1 -C 6 alkyl- or heterocyclyl-C 1 -C 6 alkyl- wherein the heterocyclyl moiety is substituted by one to three R 12 ;

each R 12 is independently halogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, C 1 -C 4 alkoxy or C 1 -C 4 haloalkoxy;

R 13 is hydrogen, C 1 -C 3 alkyl, or C 1 -C 3 haloalkyl;

R 14 is hydrogen, methyl or C 1 haloalkyl;

G is hydrogen, or C(O)R 3 ;

R 3 is selected from the group consisting of C 1 -C 6 alkyl, C 1 -C 6 alkenyl, C 1 -C 6 alkynyl, C 1 -C 6 alkoxy, C 1 -C 6 alkyl-S—, —NR 4 R 5 and phenyl optionally substituted by one or more R 6 ;

R 4 and R 5 are independently selected from the group consisting of C 1 -C 6 alkyl and C 1 -C 6 alkoxy, or R 4 and R 5 together can form a morpholinyl ring;

R 6 is selected from the group consisting of halogen, cyano, nitro, C 1 -C 3 alkyl, C 1 -C 3 haloalkyl, C 1 -C 3 alkoxy and C 1 -C 3 haloalkoxy; and T is a 5- or 6-membered monocyclic heteroaryl ring system containing 1, 2, or 3 heteroatoms independently selected from nitrogen, oxygen and sulphur, said 5-membered ring system being substituted by one or more radicals selected from X, Y, and R 7 , and said 6-membered ring system being substituted by one or more radicals selected from X 1 , X 2 , X 3 , X 4 and R 7 , and wherein the oxy-alkyl-D moiety and the bi-cyclic moiety are linked via ring T such that they are situated ortho with respect to each other;

or T is a substituted phenyl ring of formula (Tp)

each X, X 3 , X 23 and each Y are independently hydrogen, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, or halogen;

X 1 is oxo, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, or halogen;

X 2 , and X 4 are independently hydrogen, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, oxo, or halogen;

X 21 is C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, or halogen;

X 22 , and X 24 are independently hydrogen, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, or halogen;

R 7 is hydrogen, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy;

A denotes the point of attachment to the oxy-alkyl-D moiety and B denotes the point of attachment to the bi-cyclic moiety; and

D is a substituted or unsubstituted monocyclic heteroaryl ring containing 1, 2, or 3 heteroatoms independently selected from oxygen, nitrogen and sulphur, and wherein when D is substituted it is substituted on at least one ring carbon atom with R 8 and/or on a ring nitrogen atom with R 9 ;

or D is the group (Dp)

each R 8 is independently oxygen, hydroxyl, halogen, cyano, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 haloalkoxy, C 1 -C 3 haloalkoxy-C 1 -C 3 alkyl-, C 1 -C 6 alkoxy, C 1 -C 3 alkoxy-C 1 -C 3 alkyl, C 1 -C 3 alkoxy-C 1 -C 3 alkoxy-C 1 -C 3 alkyl-, C 3 -C 6 cycloalkyl, C 2 -C 6 alkenyl, C 2 -C 6 haloalkenyl, C 2 -C 6 alkynyl, C 1 -C 6 hydroxyalkyl-, C 1 -C 6 alkylcarbonyl-, C 1 -C 6 alkyl-S(O) m —, amino, C 1 -C 6 alkylamino, C 1 -C 6 dialkylamino, —C(C 1 -C 3 alkyl)=N—O—C 1 -C 3 alkyl and C 2 -C 6 haloalkynyl;

m is an integer of 0, 1, or 2;

each R 9 is independently, C 1 -C 4 alkyl, C 3 -C 6 alkoxy, C 1 -C 2 alkoxy-C 1 -C 2 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 haloalkyl, C 2 -C 4 haloalkenyl, C 2 -C 4 alkynyl or C 2 -C 4 haloalkynyl;

p denotes the point of attachment of (Dp) to the rest of the molecule; and

Z 1 , Z 2 , Z 3 , Z 4 , and Z 5 are each independently selected from hydrogen, C 1 -C 3 alkyl, C 1 -C 3 alkoxy, C 1 -C 3 haloalkyl, C 1 -C 3 haloalkoxy, or halogen;

provided that when A 4 is S, A 2 is NR 11 , and A 3 is C(O), then T is not (Tp) when D is (Dp).

2. The compound according to claim 1 , wherein G is hydrogen, or C(O)R 3 wherein R 3 is C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 2 -C 3 alkenyl, C 2 -C 3 alkynyl or —C 1 -C 3 alkoxy.

3. The compound according to claim 1 , wherein D is a substituted or unsubstituted furyl, thienyl, pyrrolyl, pyrazolyl, imidazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl, 1,2,5-oxadiazolyl, 1,2,3-thiadiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,5-thiadiazolyl, pyridyl, pyridonyl, pyrimidinyl, pyridazinyl, pyrazinyl, 1,2,3-triazinyl, 1,2,4-triazinyl, or 1,3,5-triazinyl ring, wherein when D is substituted it is substituted on at least one ring carbon atom with R 8 and/or on a ring nitrogen atom with R 9 .

4. The compound according to claim 1 , wherein D is (Dp).

5. The compound according to claim 1 , wherein T is selected from the group consisting of (Tp) and (T1) to (T62):

wherein in X, X 1 , X 2 , X 3 , X 4 , Y, R 7 , A and B are as defined in claim 1 .

6. The compound according to claim 1 wherein T is (Tp) or an optionally substituted pyrazolyl ring selected from the group consisting of:

wherein,

X, Y, R 7 , A and B are as defined in claim 1 .

7. The compound of claim 1 , wherein T is selected from (T1), (T4), and (T5), and X is hydrogen or halogen.

8. The compound according to claim 6 , wherein T is selected from (T4) and (T5) and X is halogen.

9. The compound according to claim 6 , wherein T is selected from (T1), (T2), and (T3) and Y is hydrogen, C 1 -C 3 alkyl, C 1 -C 3 haloalkyl, or halogen.

10. The compound according to claim 6 , wherein T is selected from (T2), (T3), (T4), and (T5) wherein R 7 is C 1 -C 3 alkyl, or C 1 -C 3 haloalkyl.

11. The compound according to claim 1 , wherein T is (Tp) and X 21 is halogen, C 1 -C 3 alkyl, or C 1 -C 3 haloalkyl.

12. The compound according to claim 1 wherein T is (Tp) and X 24 is halogen, C 1 -C 3 alkyl, or C 1 -C 3 haloalkyl.

13. A herbicidal composition comprising a herbicidal compound according to claim 1 and an agriculturally acceptable formulation adjuvant.

14. A herbicidal composition according to claim 13 , further comprising at least one additional pesticide.

15. A method of controlling unwanted plant growth, comprising applying a compound of formula (I) as defined in claim 1 to the unwanted plants or to the locus thereof.