1-Benzylidene-2-[4-(4-chloro-alpha-cyanobenzyl)-3,5-dichlorophenyl]-4-(2,2-dimethoxyethyl)semicarbazide 、 盐酸 以
乙腈 为溶剂,
反应 1.5h,
以produced in Working Example 2的产率得到2-[4-(4-chloro-α-cyanobenzyl)-3,5-dichlorophenyl]-4 5-dihydro-1,2,4-triazin-3(2H)-one
参考文献:
名称:
1, 2, 4-Triazin-3-one derivatives, production and use thereof
The present invention provides a novel triazine derivative of the formula
wherein ring A is an optionally substituted aromatic group which be;
X is an oxygen or sulfur atom;
R1 and R6 are each a hydrogen atom or an optionally substituted hydrocarbon residue or heterocyclic group which may bound through a heteroatom;
R2 and R3 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen or sulfur atom, or taken together, represent = S;
R4 and R5 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen, nitrogen or sulfur atom;
R1 and R2, and R5 and R6, may each bind together to form a chemical bond; provided that where ring A is a phenyl group having at least a halogen atom in position-2 or 4 and X is an oxygen atom, R4 and R5 do not conjoinedly represent a chemical bond and an antiprotozoan composition containing the same or salt thereof.
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:
wherein R1 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:
wherein R1 stands for an optionally substituted hydrocarbon residual group; R2 and R3 stand for hydrogen, an optionally substituted hydrocarbon residual group or an electron withdrawing group; and R4 stands for an optionally substituted alkyl group to a ring-closure reaction.
1, 2, 4-Triazin-3-one derivatives, production and use thereof
申请人:Takeda Chemical Industries, Ltd.
公开号:US05994355A1
公开(公告)日:1999-11-30
The present invention provides a novel triazine derivative of the formula ##STR1## wherein ring A is an optionally substituted aromatic group; X is an oxygen or sulfur atom; R.sup.1 and R.sup.6 are each a hydrogen atom or an optionally substituted hydrocarbon residue or heterocyclic group which may bound through a hetero-atom; R.sup.2 and R.sup.3 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen or sulfur atom, or taken together, represent .dbd.S; R.sup.4 and R.sup.5 are each independently a hydrogen atom, a halogen-atom, or a group bound through a carbon, oxygen, nitrogen or sulfur atom; R.sup.1 and R.sup.2, and R.sup.5 and R.sup.6 may each bind together to form a chemical bond; provided that where ring A is a phenyl group having at least a halogen atom in position -2 or 4 and X is an oxygen atom, R.sup.4 and R.sup.5 do not conjoin to form a chemical bond, or a salt thereof. The invention also encompasses an antiprotozoan composition comprising the novel triazine derivative or a salt thereof.