BENZAMIDE SEMICARBAZONE DERIVATIVES AND THEIR USE AS PESTICIDES

摘要

A semicarbazone derivative of formula (I), wherein W is an oxygen atom or a sulfur atom; each of X, Y and Z which are independent of one another, is a halogen atom, a hydroxyl group, a cyano group, a nitro group, SCN, a trimethylsilyl group, R<9>, OR<9>, S(O)pR<9>, OS(O)2R<9>, OC(O)R<9>, C(O)R<9>, CO2R<9>, C(O)N(R<9>)R<10>, SO2N(R<9>)R<10>, NHC(O)R<9>, N(R<9>)R<10>, or -CH=CH-CH=CH-, -OCH2O-, -OCH2CH2O-, -OCF2O-, -OCF2CF2O- or -OCF2CF2- bridging the adjacent carbon atoms; R<1> is a hydrogen atom, R<5>, a C1-6alkyl group which may be substituted by R<5>, or a phenyl group which may be substituted by (R<5>)q; each of R<2>, R<3> and R<4> which are independent of one another, is a hydrogen atom, a C1-6alkyl group, a C2-6alkenyl group, a C2-6alkynyl group, a C1-6haloalkyl group, a C2-6alkoxyalkyl group, a C2-6alkylcarbonyl group, a C2-6alkoxycarbonyl group, a C2-6haloalkylcarbonyl group, a C1-6alkylthio group, a C1-6haloalkylthio group, R<6>OC(O)N(R<7>)S-, R<7>(R<8>)NS-, or a benzyl group which may be substituted by (R<5>)q; R<5> is a halogen atom, a hydroxyl group, a cyano group, a nitro group, a C1-6alkyl group, a C1-6haloalkyl group, a C1-6alkoxy group, a C1-6haloalkoxy group, a C1-6alkylthio group, a C1-6haloalkylthio group, a C1-6alkylsulfonyl group, a C1-6haloalkylsulfonyl group, a C2-6alkoxycarbonyl group, an amino group, or a di C1-6alkylamino group; k is an integer of from 0 to 2, provided that when k is 2, the plurality of R<1> may be the same or different; l is an integer of from 0 to 5, provided that when l is from 2 to 5, the plurality of X may be the same or different; m is an integer of from 0 to 5, provided that when m is from 2 to 5, the plurality of Y may be the same or different; n is an integer of from 1 to 5, provided that when n is from 2 to 5, the plurality of Z may be the same or different. Semicarbazone derivatives of formula (I) exhibit excellent insecticidal activities at a low dose and they are very useful compounds substantially free from adverse effects against mammals, fishes and beneficial insects.