Microbiocidal oxadiazole derivatives

A compound of formula (I):

• wherein
• n is 1 or 2;
• A1 represents N or CR1, wherein R1 is hydrogen, halogen, methyl, ethyl, trifluoromethyl, methoxy, ethoxy or difluoromethoxy;
• A2 represents N or CR2, wherein R2 is hydrogen, halogen, methyl, ethyl, trifluoromethyl, methoxy, ethoxy or difluoromethoxy;
• A3 represents N or CR3, wherein R3 is hydrogen or halogen;
• A4 represents N or CR4, wherein R4 is hydrogen or halogen;
• and
• wherein no more than two of A1 to A4 are N;
• R5 and R6 are independently selected from hydrogen, C1-4alkyl, halogen, cyano, trifluoromethyl and difluoromethyl;
• R7 is hydrogen;
• R8 represents —C(O)R9, wherein R9 is hydrogen, C1-6alkyl, C2-6alkenyl, C2-6alkynyl, cyanoC1-6alkyl, C1-6haloalkyl, C2-6haloalkenyl, hydroxyC1-6alkyl, hydroxyC1-6haloalkyl, C1-4alkoxyC1-6alkyl, C1-4haloalkoxyC1-6alkyl, C1-4alkoxyC1-4alkoxyC1-6alkyl, C2-6alkynyloxyC1-6alkyl, aminoC1-6alkyl, N—C1-4alkylaminoC1-6alkyl, N,N-diC1-4alkylaminoC1-6alkyl, C1-6alkylcarbonylC1-6alkyl, C1-6alkylcarbonylC2-6alkenyl, C1-6alkoxycarbonylC1-6alkyl, C1-6alkylcarbonyloxyC1-6alkyl, N—C1-4alkylcarbonylaminoC1-6alkyl, N—C1-4alkylaminocarbonylC1-6alkyl, N,N-diC1-4alkylaminocarbonylC1-6alkyl, C1-6alkylsulfanylC1-6alkyl, C1-6alkylsulfonylC1-6alkyl or C1-6alkylsulfonylaminoC1-6alkyl;
• or
• R8 represents —C(O)OR10, wherein R10 is hydrogen, C1-8alkyl, C3-6alkenyl, C3-6alkynyl, cyanoC1-6alkyl, C1-6haloalkyl, C3-6haloalkenyl, hydroxyC1-6alkyl, C1-4alkoxyC1-6alkyl, C1-4haloalkoxyC1-6alkyl, C1-4alkoxyC1-4alkoxyC1-6alkyl, C2-6alkynyloxyC1-6alkyl, aminoC1-6alkyl, N—C1-4alkylaminoC1-6alkyl, N,N-diC1-4alkylaminoC1-6alkyl, C1-6alkylcarbonylC1-6alkyl, C1-6alkylcarbonylC2-6alkenyl, C1-6alkoxycarbonylC1-6alkyl, C1-6alkylcarbonyloxyC1-6alkyl, N—C1-4alkylaminocarbonylC1-6alkyl, N,N-diC1-4alkylaminocarbonylC1-6alkyl, C1-4alkylsulfanylC1-6alkyl, C1-6alkylsulfonylC1-6alkyl or C1-6alkylsulfonylaminoC1-6alkyl;
• or
• R8 represents —C(O)NR11R12, wherein R11 is hydrogen, cyano, C1-7alkyl, C2-6alkenyl, C2-6alkynyl, cyanoC1-8alkyl, C1-6haloalkyl, C2-6haloalkenyl, hydroxyC1-6alkyl, C1-4alkoxyC1-6alkyl, C1-4haloalkoxyC1-6alkyl, C1-4alkoxyC1-4alkoxyC1-6alkyl, C2-6alkynyloxyC1-6alkyl, aminoC1-6alkyl, N—C1-4alkylaminoC1-6alkyl, N,N-diC1-4alkylaminoC1-6alkyl, C1-6alkylcarbonylC1-6alkyl, C1-6alkylcarbonylC2-6alkenyl, C1-6alkoxycarbonylC1-6alkyl, C1-6alkylcarbonyloxyC1-6alkyl, N—C1-4alkylaminocarbonylC1-6alkyl, N,N-diC1-4alkylaminocarbonylC1-6alkyl, C1-4alkylsulfanylC1-6alkyl, C1-6alkylsulfonylC1-6alkyl or C1-6alkylsulfonylaminoC1-6alkyl;
• R12 is hydrogen, C1-4alkyl, C1-4alkoxy, C1-4alkoxyC1-6alkyl, C3-6alkenoxy or C3-6alkynoxy;
• or
• R11 and R12 together with the nitrogen atom they share form a 4-, 5- or 6-membered cycle optionally containing a heteroatom moiety comprising O, S or NR13;
• R13 is hydrogen, methyl, methoxy, formyl or acyl;
• or
• a salt or an N-oxide thereof;
• with the proviso that the compound of Formula (I) is not:
• tert-butyl-N-[[4-[5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl]phenyl]methyl]carbamate.