New class of pyrethroids and their use as insecticides

摘要

Novel compounds having insecticidal and acaricidal activity which is retained over long periods of time under outdoor conditions have the general formula: IMAGE in which: A represents CF3-C IDENTICAL C-, IMAGE in which X represents a hydrogen, fluorine, chlorine or bromine atom, and Y represents a chlorine or bromine atom, and R represents IMAGE the group IMAGE is bound to the 2 or 3 position, IMAGE in which R1 represents a hydrogen atom, -CN or -C IDENTICAL CH, R2 represents a 3-phenoxy, 3- benzyl, 4-allyl or 4-propargyl group, R3 represents a hydrogen atom or an alkyl group and is bound to the 2 or 3 position, R4 represents a benzyl, benzoyl, phenoxy, allyl or propargyl group and is bound to the 4 or 5 position, Z represents an oxygen or sulphur atom, R5 and R6 each independently represent an alkyl group having 1 to 3 carbon atoms or R5 and R6 together with the atoms to which they are bonded represent an aromatic, heteroaromatic or aliphatic, saturated or unsaturated orthocondensed ring, R7 and R8 independently represent a hydrogen or halogen atom or CH3, and R9 represents a phenyl, vinyl substituted vinyl or phenoxy group. Novel intermediates of formula I wherein R is hydrogen or C1-C4 alkyl are also described.