| 摘要 |
An object of the invention is to to provide a method of triazine derivatives conveniently and in a high yield A method of producing a 1,2,4-triazin-3-one derivative represented by the formula: <CHEM> wherein R<1> is an optionally substituted hydrocarbon residual group; X stands for carbonyl group, thiocarbonyl group or an optionally substituted methylene group; and dashed line means that a double bond may optionally be formed, which comprises by subjecting a semicarbazone derivative represented by the formula: <CHEM> wherein R<1> stands for an optionally substituted hydrocarbon residual group; R<2> and R<3> stand for hydrogen, an optionally substituted hydrocarbon residual group or an electron withdrawing group; and R<4> stands for an optionally substituted alkyl group to a ring-closure reaction.
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