Alkanesulfonate derivatives and their use as insecticides, acaricides or nematicides.

摘要

Compounds of the formula: R<1> - S(O)x @@Ar@@ O - SO2 - R<2> (I) wherein Ar is a pyridine, pyridazine, pyrimidine, pyrazine, isoquinoline or thiazole ring which, apart from the groups R<1> - S(O)x and -O- SO2 - R<2>, is unsubstituted or substituted by from l to 3 substituents selected from halogen, C1 to C4-alkyl which is unsubstituted or substituted by halogen, C1 to C4-alkoxy, CF3 and nitro; R<1> is C1 to C8-alkyl; C1 to C7-alkyl which is substituted by from l to 3 F, Cl or Br or by C1 to C4-alkoxy or C1 to C4- alkylthio; C3 to C7-cycloalkyl which is unsubstituted or substituted by from l to 4 F, Cl or methyl; C3 to C6-cycloalkylmethyl which is unsubstituted or substituted by from l to 4 F, Cl, Br or methyl; allyl; propargyl; phenyl or benzyl; R<2> is C1 to C4-alkyl which is unsubstituted or substituted by from l to 3 F or Cl; x is 0, l or 2; with the proviso that, when Ar is a pyridine ring which is substituted by R<1>-S(O)x and -O-SO2R<2> at the 2- and 6-positions and R<1> is C1 to C7-alkyl, the pyridine ring is further substituted as above but not by from l to 3 halogen atoms; are useful for killing insect pests, acaridae and nematodes.