Acaricidal and insecticidal substituted pyrimidines and a process for the preparation thereof

A compound of Formula I

• wherein
• R1 is hydrogen, (C1-6)alkylthio, halo(C1-6)alkylthio (C1-6)alkylsulphinyl, halo(C1-6)alkylsulphinyl, (C1-6)alkylsulphonyl, halo(C1-6)alkylsulphonyl or NR12R13;
• R12 and R13 are each independently hydrogen,(C1-6)alkyl, or halo(C1-6)alkyl;
• R2, R3, R4, R5, R6, R7, R8, R9 and R11 are each independently selected from hydrogen, halogen, cyano, nitro, (C1-6)alkyl, halo(C1-6)alkyl, (C1-6)alkoxy, halo(C1-6)alkoxy, (C1-6)alkoxy(C1-6)alkyl, halo(C1-6)alkoxy(C1-6)alkyl, (C1-6)alkylthio, halo(C1-6)alkylthio, (C1-6)alkyl sulphinyl, halo(C1-6)alkylsulphinyl, (C1-6)alkylsulphonyl, halo(C1-6)alkylsulphonyl, amino, (C1-6)alkylamino, di(C1-6)alkylamino, halo(C1-6)alkylamino,(C1-6)alkylhaloalkyl(C1-6amino, dihalo(C1-6)alkylamino, (C1-6)alkyloxy-carbonyl, halo(C1-6)alkyloxycarbonyl, (C2-6)alkenyl, halo(C2-6)alkenyl, (C2-6)alkynyl, halo(C2-6)alkynyl;
• R10 is halogen, halo(C1-6)alkyl, halo(C2-6)alkenyl or halo(C2-6)alkynyl;
• and X1 and X2 are independently selected from the group consisting of NR14, NR15, O, CH2, CR18R19, CO, C═NOR20;
• wherein R14 is (C1-6)alkyl;
• R15 is H, (C1-6)alkyl or CH(OR16)(OR17);
• R16 and R17 are each independently (C1-6)alkyl;
• R18 and R19 each independently selected from H, (C1-6)alkyl, (C2-6)alkenyl and (C2-6)alkynyl which are all optionally substituted by one or more halogens which are the same or different, or R18 and R19 may together form a carbocyclic ring which is optionally substituted by one or more halogens which are the same or different;
• R20 is (C1-6)alkyl;
• with the proviso that X1 cannot be the same as X2, and with the proviso that the compound of formula 1 is not 4-[m-(trifluoromethyl)benzyl]-]6-(α,α,α-trifluoro-N-methyl-m-toluidino)pyrimidine.