Imidazopyrimidine derivatives with sulfur containing phenyl and pyridyl substituents

1. A compound of formula (I)

wherein

A 1 is CH or N;

X is S, SO or SO 2 ;

R 1 is C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, C 3 -C 6 cycloalkyl or C 3 -C 6 cycloalkylC 1 -C 4 alkyl;

R 2 is halogen, hydroxy, mercapto, C 1 -C 6 haloalkyl, C 1 -C 4 haloalkylsulfanyl, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl or C 1 -C 6 haloalkoxy;

R 3 is hydrogen, C 1 -C 6 alkyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkylC 1 -C 4 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, C 3 -C 6 halocycloalkylC 1 -C 4 alkyl, C 1 -C 4 alkoxyC 1 -C 4 alkyl, C 1 -C 4 alkoximinoC 1 -C 4 alkyl, C 1 -C 4 alkylsulfanylC 1 -C 4 alkyl, C 1 -C 4 alkylsulfinylC 1 -C 4 alkyl, C 1 -C 4 alkylsulfonylC 1 -C 4 alkyl, C 1 -C 6 cyanoalkyl, aminocarbonylC 1 -C 4 alkyl, C 1 -C 4 alkylaminocarbonylC 1 -C 4 alkyl, di(C 1 -C 4 alkyl)aminocarbonylC 1 -C 4 alkyl, hydroxycarbonylC 1 -C 4 alkyl, C 1 -C 4 alkoxycarbonylC 1 -C 4 alkyl, C 1 -C 6 cyanohaloalkyl, aminocarbonylC 1 -C 4 haloalkyl, hydroxycarbonylC 1 -C 4 haloalkyl, C 1 -C 4 alkoxycarbonylC 1 -C 4 haloalkyl, C 1 -C 4 alkoxycarbonimidoyl, C 1 -C 4 alkylsulfonyl, C 1 -C 4 haloalkylsulfonyl;

or R 3 is a four- to six-membered heterocyclic ring system which can be partially saturated or fully saturated, said ring system contains 1 to 2 heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, and said ring system can be mono- or polysubstituted by substituents selected from the group consisting of halogen, cyano, C 1 -C 4 alkoxy, C 1 -C 4 haloalkyl and oxo; wherein the sulfur can be present in the oxidation states of 0, 1 or 2;

R 4 is hydrogen, halogen or C 1 -C 4 alkyl; and

R 5 is hydrogen, halogen or C 1 -C 4 alkyl;

or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide of a compound of formula (I).

2. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 3 is hydrogen, C 1 -C 6 alkyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkylC 1 -C 4 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, C 3 -C 6 halocycloalkylC 1 -C 4 alkyl, C 1 -C 4 alkoxyC 1 -C 4 alkyl, C 1 -C 4 alkoximinoC 1 -C 4 alkyl, C 1 -C 4 alkylsulfanylC 1 -C 4 alkyl, C 1 -C 4 alkylsulfinylC 1 -C 4 alkyl, C 1 -C 4 alkylsulfonylC 1 -C 4 alkyl, C 1 -C 6 cyanoalkyl, aminocarbonylC 1 -C 4 alkyl, C 1 -C 4 alkylaminocarbonylC 1 -C 4 alkyl, di(C 1 -C 4 alkyl)aminocarbonylC 1 -C 4 alkyl, hydroxycarbonylC 1 -C 4 alkyl, C 1 -C 4 alkoxycarbonylC 1 -C 4 alkyl, C 1 -C 6 cyanohaloalkyl, aminocarbonylC 1 -C 4 haloalkyl, hydroxycarbonylC 1 -C 4 haloalkyl, C 1 -C 4 alkoxycarbonylC 1 -C 4 haloalkyl, C 1 -C 4 alkoxycarbonimidoyl, C 1 -C 4 alkylsulfonyl, C 1 -C 4 haloalkylsulfonyl; or R 3 is a four- to six-membered heterocyclic ring system which can be partially saturated or fully saturated, said ring system contains 1 to 2 heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, and said ring system can be mono- or polysubstituted by substituents selected from the group consisting of halogen, cyano, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 1 -C 4 haloalkyl and oxo, wherein the sulfur can be present in the oxidation states of 0, 1 or 2; or

R 3 is oxetanyl which can be mono-substituted by C 1 -C 4 alkyl.

3. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 1 is C 1 -C 4 alkyl or C 3 -C 6 cycloalkyl-C 1 -C 4 alkyl.

4. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 2 is C 1 -C 2 haloalkyl, halomethylsulfanyl, halomethylsulfinyl or halomethylsulphonyl.

5. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 3 is C 1 -C 4 cyanoalkyl, C 1 -C 4 alkylsulfanylC 1 -C 4 alkyl, C 1 -C 4 alkylsulfinylC 1 -C 4 alkyl or C 1 -C 4 alkylsulfonylC 1 -C 4 alkyl; or R 3 is oxetanyl which can be mono-substituted by C 1 -C 4 alkyl.

6. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein X is SO 2 .

7. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 4 and R 5 are both hydrogen.

8. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 or 7 wherein R 1 is ethyl and R 2 is trifluoromethyl, pentafluoroethyl or trifluoromethylsulfanyl.

9. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 3 is C 1 -C 4 cyanoalkyl, C 1 -C 2 alkylsulfanylC 1 -C 2 alkyl, C 1 -C 2 alkylsulfinylC 1 -C 2 alkyl or C 1 -C 2 alkylsulfonylC 1 -C 2 alkyl.

10. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein R 3 is —CH(CH 3 )CN, —C(CH 3 ) 2 CN, methylsulfanylmethyl, methylsulfonylethyl, methylsulfinylmethyl, methylsulfinylethyl, methylsulfonylmethyl or methylsulfonylethyl.

11. A compound according to claim 1 wherein

X is SO 2 ;

R 1 is ethyl;

R 2 is trifluoromethyl, pentafluoroethyl or trifluoromethylsulfanyl; and

R 4 and R 5 are both hydrogen;

or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof.

12. A compound, or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, according to claim 1 wherein A 1 is N.

13. A composition comprising an insecticidally, acaricidally, nematicidally or molluscicidally effective amount of a compound of formula (I), or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, as defined in claim 1 and, optionally, an auxiliary or diluent.

14. 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), or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, as defined in claim 1 .

15. A method for the protection of plant propagation material from the attack by insects, acarines, nematodes or molluscs, which comprises treating the propagation material or the site, where the propagation material is planted, with a composition according to claim 13 .

16. 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), or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof, or a composition as defined in claim 13 .