| 摘要 |
Novel esters in the form of their stereoisomers or mixtures thereof of the formula <IMAGE> I X1 is selected from the group consisting of hydrogen, fluorine, chlorine and bromine, X2 is selected from the group consisting of fluorine, chlorine and bromine, X3 is selected from the group consisting of chlorine and bromine, each Z is independently selected from the group consisting of alkyl of 1 to 4 carbon atoms, alkoxy and alkylthio of 1 to 4 carbon atoms, alkylsulfonyl of 1 to 4 carbon atoms, -CF3, 3,4-methylenedioxy, chlorine, fluorine and bromine, n is 0, 1 or 2, Y is selected from the group consisting of oxygen and sulfur and R is selected from the group consisting of hydrogen, -CN and ethynyl, the acid moiety having a structure selected from the group consisting of 1R, cis; 1S, cis; 1R, trans; and 1S, trans and the alcohol moiety having a configuration of (R), (S) or (RS) and the asymetric carbon in the 1-position of the 3-ethyl side chain exists in the form of isomer A and isomer B having insecticidal and acaricidal activity and their preparation.
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