(N-METHYLCARBAMOYL-(2,2-DIMETHYL-(2H,3H)-DIHYDROBENZOFURAN-7-YLOXY)-(N'.N.N-TRIALKYL UREA)-N.N'-SULFIDE DERIVATIVES, PROCESS FOR THEIR PREPARATION, COMPOSITIONS CONTAINING THESE DERIVATIVES AS ACTIVE COMPONENTS AND THEIR USE IN COMBATING INSECTS

摘要

Compounds of the formula I (I) wherein R1 and R2 are each C1-C4-alkyl, R3 is C1-C10-alkyl or C3-C6-cycloalkyl and R4 is 2-isopropoxyphenyl; 2-(1,3-dioxolan-2-yl)-phenyl; 2-methylthiomethylphenyl; 2-ethylthiomethylphenyl; 2-isopropylphenyl; 3,5-dimethyl-4-methylthiophenyl or 2,2-dimethyl-(2H,3H)-dihydrobenzofuran-7-yl having valuable pesticidal in particular insecticidal properties.