OXA(THIA)DIAZOLE DERIVATIVE, ITS PRODUCTION AND MITICIDE

摘要

NEW MATERIAL:The compound of formula I [R1 is halogen, lower alkyl, lower alkoxy, amino, etc.; X is O or S; A is group of formula II (r<3> and r<4> are H, halogen, lower alkyl, etc.), -O-, formula III (k is 0-2) or formula IV (r<5> is H or lower alkyl); B, D=A; n, m and l are 0 or 1; when A is group of formula II, m is 1 and A=B or B=Dnot equal to O or S; R2 is group of formula V (r<15> is H, lower alkyl, etc.; Z is O, S, phenyl, etc.), etc.]. EXAMPLE:3-(2,6-Dichlorophenyl)-5-(4-isopropoxybenzyl)-1,2,4-oxadiazole. USE:A miticide. It exhibits excellent ovicidal, larvicidal and nymphicidal activities against ovum, larva and nymph of plant-parasitic spider mites such as Tetranychus desertorum and has low toxicity and high safety to warm-blooded animals. PREPARATION:A compound of formula I wherein A is A' can be produced by heating and cyclizing a compound of formula IV (A' is group of formula II).