Thiadiazines, process for production thereof, and insecticide.

摘要

Novel tetrahydro-1,3,5-thiadiazin-4-ones represented by general formula (I) <CHEM> wherein each of R<1> and R<2> represents a halogen atom or a lower alkyl group having 1 to 4 carbon atoms, R<3> represents a halogen atom, or a lower alkyl having 1 to 4 carbon atoms, lower cycloalkyl having 3 to 6 carbon atoms, lower alkoxy having 1 to 6 carbon atoms, acetyl, phenoxy, halo-substituted phenoxy, benzyl, benzyloxy, phenylcarbonyl or trifluoromethyl group, m represents 0, 1, 2 or 3, and n represents 0, 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) <CHEM> wherein R<1> and m are as defined above, with a compound represented by general formula (III) <CHEM> wherein R<2>, R<3> and n are as defined above. d