Pesticidally active mesoionic heterocyclic compounds

A compound of formula I,

• wherein
• W is S or O;
• V is S or O;
• R1a and R1b are, independently, hydrogen, halogen, amino, hydroxyl, C1-C6alkyl, C1-C6 haloalkyl, C1-C6haloalkoxy, C1-C6 alkoxy, or cyano;
• R2 is hydrogen, halogen, hydroxyl, amino, cyano, C1-C6 alkyl, mono- or poly-substituted C1-C6 alkyl wherein the substituent is independently selected from the group consisting of halogen, hydroxyl, amino, cyano, nitro, C1-C6 haloalkoxy, C1-C6 alkoxy, triazole, pyrazole, imidazole and tetrazole, wherein said triazole, pyrazole, imidazole and tetrazole can be mono- or polysubstituted by substituents independently selected from the group consisting of halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl and cyano;
• R3 is hydrogen or C1-C6 alkyl;
• R4 is hydrogen or a 5 or 6 membered heteroaromatic ring Y, optionally independently substituted with a substituent from the group selected from U, wherein Y is a ring selected from Y1 to Y29
• n is 0, 1, 2 or 3;
• Z is hydrogen, cyano, nitro, hydroxyl, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy or C1-C4 haloalkoxy;
• U is independently selected from the group consisting of halogen, cyano, nitro, hydroxyl, amino, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy, C1-C4 haloalkoxy, C1-C4 haloalkoxy-C1-C4 alkyl, C1-C4 alkoxy-C1-C4 alkyl, C1-C4 alkylsulfanyl, C1-C4 alkylsulfinyl, C1-C4 alkylsulfonyl, C1-C4haloalkylsulfanyl, C1-C4haloalkylsulfinyl, C1-C4haloalkylsulfonyl, and cyclopropyl;
• R5 is C1-C6 alkyl, C3-C6 cycloalkyl, C1-C6 haloalkyl, or C1-C6 alkoxy;
• or
• R5 is phenyl, the ring system of either can be mono- or polysubstituted by substituents independently selected from halogen, C1-C4 alkyl, C1-C4haloalkyl, C1-C4 alkoxy and C1-C4 haloalkoxy;
• and
• R6 is a 5 to 12 membered aromatic ring, which can be monocyclic or polycyclic, which ring system can be mono- or polysubstituted by substituents independently selected from the group U2;
• or
• R6 is a 3 to 12 membered heteroaromatic ring or saturated or partially saturated heterocyclic ring, each of which ring system can be monocyclic or polycyclic, which ring system can contain 1 to 4 hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, with the proviso that each ring system cannot contain more than 2 oxygen atoms or more than 2 sulfur atoms, wherein the nitrogen heteroatom can be substituted by Z and said 3 to 12-membered ring system can be mono- or polysubstituted by substituents independently selected from the group U2;
• or
• R6 is hydrogen, amino, halogen, cyano, C1-C6 haloalkoxy, C1-C6 alkoxy, C1-C4 alkylsulfanyl, C1-C4 alkylsulfinyl, C1-C4 alkylsulfonyl, C1-C4haloalkylsulfanyl, C1-C4haloalkylsulfinyl, C1-C4haloalkylsulfonyl, C2-C6 alkenyl, C2-C6 haloalkenyl, C2-C6 alkynyl, C2-C6 haloalkynyl, benzyl optionally mono- or poly-substituted by a halogen (in case of polysubstitution, can be the same of different) or —C(O)R7. or
• R6 is C1-C6 alkyl, which is optionally mono- or polysubstituted by substituents independently selected from the group U3, or
• R6 is C3-C6 cycloalkyl, which is optionally mono- or polysubstituted by substituents independently selected from the group U;
• wherein
• U2 is halogen, nitro, cyano, amino, hydroxyl, —SCN, —CO2H, C1-C6 alkyl, C3-C6 cycloalkyl, C3-C6 halocycloalkyl, C3-C6 cycloalkyl-C1-C4 alkyl, C3-C6 halocycloalkyl-C1-C4 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C4 alkoxy-C1-C4 alkyl, C1-C4 alkoxy-C1-C4 alkoxy, cyano-C1-C4 alkyl, cyano-C1-C4 haloalkyl, C2-C6 alkenyl, C2-C6 haloalkenyl, C2-C6 alkynyl, C2-C6 haloalkynyl, C1-C6 haloalkoxy, C1-C4 haloalkoxy-C1-C4 alkyl, C1-C6 alkylsulfanyl, C1-C6 alkylsulfinyl, C1-C6 alkylsulfonyl, C1-C6 haloalkylsulfanyl, C1-C6 haloalkylsulfinyl, C1-C6 haloalkylsulfonyl, C1-C6 alkylcarbonyl, C1-C6 alkoxycarbonyl, C1-C6 haloalkylcarbonyl, C1-C6 haloalkoxycarbonyl, (C1-C6 alkyl)NH, (C1-C6 alkyl)2N, (C3-C6 cycloalkyl)NH, (C3-C6 cycloalkyl)2N, C1-C6 alkylcarbonylamino, C3-C6 cycloalkylcarbonylamino, C3-C6 haloalkylcarbonylamino, C3-C6 halocycloalkylcarbonylamino, C1-C6 alkylaminocarbonyl, C3-C6 cycloalkylaminocarbonyl, C1-C6 haloalkylaminocarbonyl, C3-C6 halocycloalkylaminocarbonyl, C3-C6 cycloalkylcarbonyl, C3-C6 halocycloalkylcarbonyl, —SF5 or —C(O)NH2;
• U3 is halogen, nitro, cyano, amino, hydroxyl, C1-C6 alkyl, C3-C6 cycloalkyl, C3-C6 halocycloalkyl, C3-C6 cycloalkyl-C1-C4 alkyl, C3-C6 halocycloalkyl-C1-C4 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C4 alkoxy-C1-C4 alkyl, C1-C4 alkoxy-C1-C4 alkoxy, cyano-C1-C4 alkyl, cyano-C1-C4 haloalkyl, C2-C6 alkenyl, C2-C6 haloalkenyl, C2-C6 alkynyl, C2-C6 haloalkynyl, C1-C6 haloalkoxy, C1-C4 haloalkoxy-C1-C4 alkyl, C1-C6 alkylsulfanyl, C1-C6 alkylsulfinyl, C1-C6 alkylsulfonyl, C1-C6 haloalkylsulfanyl, C1-C6 haloalkylsulfinyl, C1-C6 haloalkylsulfonyl, C1-C6 alkylcarbonyl, C1-C6 alkoxycarbonyl, C1-C6 haloalkylcarbonyl or C1-C6 haloalkoxycarbonyl;
• or
• U3 is a 5 to 6 membered aromatic ring, heteroaromatic ring, or saturated or partially saturated carbocyclic or heterocyclic ring (wherein the heteroatomatic and heterocyclic rings can contain 1 to 4 hetero atoms selected from the group consisting of nitrogen substituted or not, oxygen and sulfur, with the proviso that each ring system cannot contain more than 2 oxygen atoms or more than 2 sulfur atoms), wherein the said 5 to 6-membered ring system can be mono- or polysubstituted by substituents independently selected from the group U;
• and
• R7 is hydrogen, amino, halogen, cyano, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, C1-C4 haloalkoxy C1-C4 alkyl, C1-C6 alkoxy-C1-C6 alkyl, C2-C6 alkenyl, C2-C6 haloalkenyl, C2-C6 alkynyl or C2-C6 haloalkynyl;
• or
• R7 is a 5 to 6 membered aromatic ring, heteroaromatic ring, or saturated or partially saturated carbocyclic or heterocyclic (wherein the heteroatomatic and heterocyclic rings can can contain 1 to 4 hetero atoms selected from the group consisting of nitrogen substituted or not, oxygen and sulfur, with the proviso that each ring system cannot contain more than 2 oxygen atoms and more than 2 sulfur atoms), wherein the said 5 to 6-membered ring system can be mono- or polysubstituted by substituents independently selected from the group U;
• or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide thereof