Carbonyloxy-cyanomethyl compounds as antiparasitic agents

A compound of formula (I)

• wherein
• Ar1 and Ar2, independently of one another, signify unsubstituted phenyl or phenyl which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C2–C6-alkenyl, halo-C2–C6-alkenyl, C2–C6-alkinyl, C3–C6-cycloalkyl, C2–C6-alkenyloxy, halo-C2–C6-alkenyloxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfonyloxy, halo-C1–C6-alkylsulfonyloxy, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl, halo-C1–C6-alkylsulfonyl, C2-C6-alkenylthio, halo-C2–C6-alkenylthio, C2–C6-alkenylsulfinyl, halo-C2–C6-alkenylsulfinyl, C2–C6-alkenylsulfonyl, halo-C2–C6-alkenylsulfonyl, C1–C6-alkylamino, di-C1–C6-alkylamino, C1–C6-alkylsulfonylamino, halo-C1–C6-alkylsulfonylamino, C1–C6-alkylcarbonyl, halo-C1–C6-alkylcarbonyl, C1–C6-alkoxycarbonyl, C1–C6-alkylaminocarbonyl, di-C1–C6-alkylaminocarbonyl;
• unsubstituted phenylamino or phenylamino which is substituted once or many times;
• unsubstituted phenylcarbonyl or phenylcarbonyl which is substituted once or many times;
• unsubstituted phenyl or phenyl which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl and halo-C1–C6-alkylsulfonyl;
• unsubstituted phenoxy or phenoxy which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl and halo-C1–C6-alkylsulfonyl;
• unsubstituted phenylacetylenyl or phenylacetylenyl which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl and halo-C1–C6-alkylsulfonyl;
• and unsubstituted pyridyloxy or pyridyloxy which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl and halo-C1–C6-alkylsulfonyl;
• halo-C2–C6-alkenylsulfinyl, C1–C6-alkylsulfonyl and halo-C1–C6-alkylsulfonyl,
• R4, R5, R6, R7 and R8 are either, independently of one another, hydrogen, halogen, unsubstituted C1–C6-alkyl or C1–C6-alkyl which is substituted once or many times, unsubstituted C2–C6-alkenyl or C2–C6-alkenyl which is substituted once or many times, unsubstituted C2–C6-alkinyl or C2–C6-alkinyl which is substituted once or many times, whereby the substituents may each be independent of one another and are selected from the group consisting of halogen, C1–C6-alkoxy and halo-C1–C6-alkoxy;
• C3–C6-cycloalkyl, whereby the substituents may be independent of one another and are selected from the group consisting of halogen and C1–C6-alkyl;
• unsubstituted phenyl or phenyl which is substituted once or many times, whereby the substituents may be independent of one another and are selected from the group consisting of halogen, nitro, cyano, C1–C6-alkyl, halo-C1–C6-alkyl, C1–C6-alkoxy, halo-C1–C6-alkoxy, C1–C6-alkylthio, halo-C1–C6-alkylthio, C1–C6-alkylsulfinyl, halo-C1–C6-alkylsulfinyl, C1–C6-alkylsulfonyl, halo-C1–C6-alkylsulfonyl, C1–C6-alkylamino or di-C1–C6-alkylamino;
• or R4 and R5 together signify C2–C6-alkylene;
• W signifies O, S, S(O2) or N(R9);
• R9 signifies hydrogen or C1–C6-alkyl;
• X signifies O, S or N(R10);
• R10 signifies hydrogen, C1–C6-alkyl, halo-C1–C6-alkyl, allyl or C1–C6-alkoxymethyl;
• a signifies 1, 2, 3 or 4;
• and
• b signifies 0, 1, 2, 3 or 4, whereby said compound is in free form or salt form.