Spiroindolinepiperidine derivatives

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
• SO2;
• R1 is hydrogen,
• C1-6 alkyl,
• C1-6 haloalkyl,
• C1-6 alkoxy(C1-6)alkyl,
• heteroaryl(C1-6)alkyl (wherein the heteroaryl group is optionally substituted by halogen, cyano, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy, C1-6 haloalkoxy),
• phenyl(C1-6)alkyl (wherein the phenyl group is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN),
• phenyl (which is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN),
• heteroaryl (which is optionally substituted by halogen, nitro, cyano, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy, C1-6 haloalkoxy),
• C1-6 alkoxy,
• C1-6 haloalkoxy,
• C2-6 alkenyl,
• C3-6 cycloalkyl,
• heterocyclyl (which is optionally substituted by halogen, cyano, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy or C1-6 haloalkoxy), or
• NR13R14 where
• R13 and R14 are independently hydrogen,
• C2-6 alkyl,
• C2-6 haloalkyl,
• phenyl (which is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, or CN) or
• heteroaryl (which is optionally substituted by halogen, cyano, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy, or C1-6 haloalkoxy);
• R2 and R3 are independently hydrogen or C1-4 alkyl;
• each R4 is independently halogen,
• cyano,
• C1-8 alkyl,
• C1-8 haloalkyl,
• C1-6 alkoxy(C1-6)alkyl,
• C2-6 alkynyl,
• C1-6 alkoxycarbonyl,
• C3-7 cycloalkyl,
• C1-3 alkyl (C3-7) cycloalkyl,
• phenyl (which is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, or CN),
• heterocyclyl (which is optionally substituted by halogen,
• nitro, cyano, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy or C1-6 haloalkoxy),
• C1-8 alkoxy, or
• C1-6 haloalkoxy,
• n is 0, 1, 2, 3 or 4;
• R8 is C1-6 alkyl,
• C1-6 haloalkyl,
• phenyl(C1-4)alkyl (wherein the phenyl group is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN, NO2, phenyl, heteroaryl, amino or dialkylamino),
• heteroaryl(C1-6)alkyl (wherein the heteroaryl group is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN, NO2, phenyl, heteroaryl, amino or dialkylamino),
• C2-6 alkenyl,
• phenyl(C2-6)alkenyl (wherein the phenyl group is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN, NO2, phenyl, heteroaryl, amino or dialkylamino),
• C2-6 alkynyl,
• phenyl(C2-6)alkynyl (wherein the phenyl group is optionally substituted by halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN, NO2, phenyl, heteroaryl, amino or dialkylamino);
• or
• —C(R51)(R52)—[CR53═CR54]z-R55 where
• z is 1 or 2,
• R51 and R52 are each independently H, or C1-2 alkyl,
• R53 and R54 are each independently H, halogen, or C1-4 alkyl and
• R55 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, C1-6 alkyl, C1-6 haloalkyl, C1-6 alkoxy(C1-6)alkyl, C1-6 alkoxy, C1-6 haloalkoxy, C3-7 cycloalkyl, nitro, or cyano);
• R9 and R10 are independently hydrogen, or C1-2 alkyl;
• and salts or N-oxides thereof.