THIADIAZINES, PROCESS FOR PRODUCTION THEREOF, AND INSECTICIDE

摘要

Novel tetrahydro-1,3,5-thiadiazin-4-ones represented by general formula (I) (I) wherein each of R1 and R2 represents a hydrogen or halogen atom or a lower alkyl group, R3 represents a halogen atom, or a lower alkyl, lower cycloalkyl, lower alkoxy, acetyl, phenoxy, halo-substituted phenoxy, benzyl, benzyloxy, phenylcarbonyl or trifluoromethyl group, m represents 1, 2 or 3, and n represents 1 or 2; or their salts. The novel compounds of formula (I) or their salts are useful as an active ingredient of an insecticide. These thiadiazines are produced by reacting a compound of general formula (II) wherein R1 and m are as defined above, with a compound represented by general formula (III) (III) wherein R2, R3 and n are as defined above.