Thiadiazines, and insecticidal and acaricidal preparations

摘要

Novel tetrahydro-1,3,5-thiadiazin-4-ones of the following general formula (I) or their salts which are useful as an insecticidal and acaricidal agent. <IMAGE> (I) In the formula, each of R1 and R2 represents a halogen atom or a C1-C4 alkyl group; R3 represents a halogen atom, a C1-C4 alkyl group, a C3-C6 cycloalkyl group, a C1-C4 alkoxy group, an acetyl group, a phenoxy group, a halo-substituted phenoxy group, a benzyl group, a benzyloxy group, a phenylcarbonyl group, a C1-C4 haloalkyloxy group, a C1-C4 haloalkyloxymethyl group, a C2-C4 haloalkenyloxy group, a C1-C4 haloalkylthio group, a C1-C4 haloalkylthiomethyl group, a C2-C4 haloalkenylthio group, a C1-C8 haloalkyl group, a C2-C8 haloalkenyl group, a C1-C8 alkyloxycarbonyl group, a substituted phenoxycarbonyl group, or a substituted pyridyloxy group; m represents 0, 1, 2 or 3; and n represents 0, 1, 2 or 3. These novel thiadiazines are produced by reacting a compound of general formula (II) <IMAGE> (II) wherein R1 and m are as defined above, with a compound of general formula (III) <IMAGE> (III) wherein R2, R3 and n are as defined above.