Synthesis and Insecticidal Activity of DichloropropeneDerivatives Containing Coumarin Group

Nine dichloropropene derivatives containing coumarin group were synthesized using diethyl malonate,resorcinol and 1,1,3-trichloropropylene as starting materials via substitution,cyclization and condensation.The structures of the compounds were confirmed by IR,1H NMR,MS and element analysis.The preliminary bioassay results showed that the title compounds exhibited good insecticidal activity against Plutella xylostella at the concentration of 400 mg/L,the inhibition rate of the compound 5e was 93%.