Spiroindolinepiperidine derivatives

1. A method of combating and controlling insects, acarines, nematodes or molluscs which comprises applying to a pest, to a locus of a pest, or to a plant susceptible to attack by a pest an insecticidally, acaricidally, nematicidally or molluscicidally effective amount of a compound of formula (I):

wherein

Y is a single bond,

C═O or

SO 2 ;

R 1 is hydrogen,

C 1-6 alkyl,

C 1-6 haloalkyl,

C 1-6 alkoxy(C 1-6 )alkyl,

heteroaryl(C 1-6 )alkyl (wherein the heteroaryl group is optionally substituted by halogen, cyano, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy, C 1-6 haloalkoxy),

phenyl(C 1-6 )alkyl (wherein the phenyl group is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN),

phenyl (which is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN),

heteroaryl (which is optionally substituted by halogen, nitro, cyano, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy, C 1-6 haloalkoxy),

C 1-6 alkoxy,

C 1-6 haloalkoxy,

C 2-6 alkenyl,

C 3-6 cycloalkyl,

heterocyclyl (which is optionally substituted by halogen, cyano, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy or C 1-6 haloalkoxy), or

NR 13 R 14 where

R 13 and R 14 are independently hydrogen,

C 2-6 alkyl,

C 2-6 haloalkyl,

phenyl (which is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, or CN) or

heteroaryl (which is optionally substituted by halogen, cyano, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy, or C 1-6 haloalkoxy);

R 2 and R 3 are independently hydrogen or C 1-4 alkyl;

each R 4 is independently halogen,

cyano,

C 1-8 alkyl,

C 1-8 haloalkyl,

C 1-6 alkoxy(C 1-6 )alkyl,

C 2-6 alkynyl,

C 1-6 alkoxycarbonyl,

C 3-7 cycloalkyl,

C 1-3 alkyl (C 3-7 ) cycloalkyl,

phenyl (which is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, or CN),

heterocyclyl (which is optionally substituted by halogen,

nitro, cyano, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy or C 1-6 haloalkoxy),

C 1-8 alkoxy, or

C 1-6 haloalkoxy,

n is 0, 1, 2, 3 or 4;

R 8 is C 1-6 alkyl,

C 1-6 haloalkyl,

phenyl(C 1-4 )alkyl (wherein the phenyl group is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, NO 2 , phenyl, heteroaryl, amino or dialkylamino),

heteroaryl(C 1-6 )alkyl (wherein the heteroaryl group is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, NO 2 , phenyl, heteroaryl, amino or dialkylamino),

C 2-6 alkenyl,

phenyl(C 2-6 )alkenyl (wherein the phenyl group is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, NO 2 , phenyl, heteroaryl, amino or dialkylamino),

C 2-6 alkynyl,

phenyl(C 2-6 )alkynyl (wherein the phenyl group is optionally substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, NO 2 , phenyl, heteroaryl, amino or dialkylamino); or

—C(R 51 )(R 52 )—[CR 53 ═CR 54 ]z-R 55 where

z is 1 or 2,

R 51 and R 52 are each independently H, or C 1-2 alkyl,

R 53 and R 54 are each independently H, halogen, or C 1-4 alkyl and

R 55 is phenyl (wherein the phenyl group is optionally substituted by one or more substituents independently selected from halogen) or

heteroaryl (wherein the heteroaryl group is optionally substituted by one or more substituents independently selected from halogen, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxy(C 1-6 )alkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, C 3-7 cycloalkyl, nitro, or cyano);

R 9 and R 10 are independently hydrogen, or C 1-2 alkyl;

and salts or N-oxides thereof.

2. The method according to claim 1 wherein

Y is C═O.

3. The method according to claim 1 wherein

R 1 is pyridyl (which is optionally substituted by halo, C 1-3 alkyl or C 1-3 haloalkyl) or C 1-6 alkoxy.

4. The method according to claim 1 wherein

R 2 and R 3 are both hydrogen.

5. The method according to claim 1 wherein each R 4 is independently fluoro, chloro, bromo, C 1-4 alkyl or C 1-4 haloalkyl; n is 1 or 2.

6. The method according to claim 1 wherein

R 8 is —C(R 51 )(R 52 )—[CR 53 ═CR 54 ]z-R 55 where z is 1 or 2, R 51 and R 52 are each independently H, or C 1-2 alkyl, R 53 and R 54 are each independently H, halogen, or C 1-4 alkyl and R 55 is phenyl substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, or NO 2 , or heteroaryl substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, or NO 2 .

7. The method according to claim 1 wherein

R 9 and R 10 are both hydrogen.

8. The method according to claim 1 wherein

Y is C═O;

R 1 is pyridyl (which is optionally substituted by halogen, C 1-3 alkyl or C 1-3 haloalkyl) or C 1-6 alkoxy;

R 2 and R 3 are independently hydrogen or

methyl;

each R 4 is independently fluoro, chloro, bromo, C 1-4 alkyl or C 1-4 haloalkyl; n is 1 or 2;

R 8 is —C(R 51 )(R 52 )—[CR 53 ═CR 54 ]z-R 55 where z is 1 or 2, R 51 and R 52 are each independently H, or C 1-2 alkyl, R 53 and R 54 are each independently H, halogen, or C 1-4 alkyl and R 55 is phenyl substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, or NO 2 , or heteroaryl substituted by halogen, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl, C 1-4 haloalkoxy, CN, or NO 2 ; and

R 9 and R 10 are both hydrogen.