| 摘要 |
The invention provides novel compounds of formula (A) <CHEM> wherein R1 is hydrogen, methyl, ethynyl or cyano; R2 is lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy or halogen; W is oxygen or sulfur; X is hydrogen, chloro or fluoro; Y is halogen; Z is H, lower alkyl, lower haloalkyl, lower alkoxy, lower alkylcarbonyl, lower alkoxycarbonyl, nitro, cyano, halogen, lower alkenyl or lower alkoxyalkyl, their synthesis, the use of such compounds and of pesticidal compositions comprising such compounds for control of pests.
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