| abstract |
NEW MATERIAL:An oxa(thia)diazole derivative expressed by formula I [R 1 is (substituted)phenyl or (substituted)lower alkyl; X is O or S; A is formula II, -S(O) k -, etc.; B is formula III, -O-, -S(O) k -, etc.: D is formula IV, -O- or -S(O) k -, etc.; n, m, l are 0 or 1; r 1 , r 2 , r 4 , r 5 , r 7 and r 8 are H, halogen, lower alkyl, etc.; or r 1 and r 2 , r 4 and r 5 or r 7 and r 8 are together oxo, etc., provided that r 4 is capable of forming double bonds together with r 1 and r 7 ; K, K' and K" are 0, 1 or 2; R 2 is -Z-, r 13 , lower alkyl, etc.; r 13 is H, lower alkoxycarbonyl, etc.; Z is O, S etc.]. n USE: Useful as an acaricidal agent, effective to various kinds of spider mites which are parasitic on plants and having low toxicity and high safety to a warm-blooded animal. n PREPARATION: For example, a compound expressed by formula V (-A'- is formula II, etc.) is heated and subjected to ring closure to provide the compound expressed by formula I. n COPYRIGHT: (C)1988,JPO&Japio |