SUBSTITUTED TETRAFLOURO BENZYL ESTERS OF CYCLOPROPONE CARBOXYLIC ACID AND INSECTICIDAL USE THEREOF

摘要

The invention provides novel, insecticidally active compounds of formula (I) : wherein X represents a group of formula : where either (i) R<1> and R<2> represent hydrogen, methyl, halo or haloalkyl, or (ii) R<1> represents hydrogen and R<2> represents either a group of formula R<3>(R<4>)C=CH- or a group of formula R<3>(R<4>)(R<5>)C-CH(R<5>)-, wherein R<3> and R<4> represent hydrogen, methyl, halo or haloalkyl and R<5> represent chloro or bromo; and Y represents -C IDENTICAL CR<1><0> or -NH-N=C(R<1><1>)R<1><2> where R<1><0>, R<1><1> and R<1><2> are selected from hydrogen, alkyl and haloalkyl, or Y represents -CH2Z where Z is selected from halo, CN, N3, CH2CN, -OCOR<6>, -SCOR<7>, -OCO2R<7>, -OR<8>, -SR<8>, -N(R<1><5>)R<8>, -OSO2R<9> and -ON=C(R<1><3>)R<1><4>, where R<6> represents H, alkyl or haloalkyl, R<7> and R<9> represent alkyl or haloalkyl, R<8> represents propargyl optionally substituted with one or more methyl groups, and R<1><3>, R<1><4> and R<1><5> represent alkyl. The invention also provides insecticidal compositions comprising the compounds of formula (I) and methods of controlling insect pests therewith, and processes and intermediates for their preparation.