TW337978B - Pesticidal compounds of a naphthalene-1, 4-diones, a preparation of the compounds, and a method of combatting pests using the compounds - Google Patents

Abstract

A method of combatting whitefly, Lepidoptera and/or fungal pests at a locus comprising treating the locus with a compound of general formula (I) or a salt thereof, in which m represents an integer 0 or 1; R1 and R2 and R7 and R8 each independently represent an optionally substituted alkioxy group or R1 with R2 and/or R7 with R8 each respectively together independently represent a group=O, =S or =N-OR9, where R9 represents a hydrogen atom or a C1-4 alkyl group; R3 represents a hydroxyl group, or a group -OL where L is a leaving group, or a group which in vivo is transformed into a group -OL1 where L1 is a leaving group wherein the pKa value of the acid LOII or L1OH in water is from 1 to 7; wherein R4 and R5 independently represent a hydrogen or halogen atom or a C1-7 alkyl or haloakyl group of C2-7 alkenyl or haloalkenyl group, or together with the knterjacent carbon atom represent at a C4-8 cycloakyl or cycloakenyl ring which is optiontally substituted with one or more substituents independently selected from halogen atoms and C1-4 alkyl or haloalkyl or C2-4 alkenyl or haloalkenyl groups; and A represents a straight or branched chain alkyl or alkenyl group, which may be optionally substituted; an acyclic carbon chain of which links the 3 position of the naphthalene ring shown and the moiety -CR4R5 and wherein A does not include a quaternary carbon atom in that chain; and wherein the total number of carbon atoms in the longest carbon chain running from the 3-position of the naphthalene ring shown is no more tha 8 and wherein, where whitefly are to be combatted the number of carbon atoms in this carbon chain is not 1 or 2.