- Preparation method of diaryl-substituted chlorotriazine OLED intermediate
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The invention provides a preparation method of a diaryl-substituted chlorotriazine OLED intermediate, and the method comprises the following steps: S1, carrying out heating reaction on an aryl nitrile compound and urea in an organic solvent under the action of strong alkali, and carrying out intermolecular ring closing to form a diaryl hydroxyl triazine compound; S2, enabling the diaryl hydroxyl triazine compound obtained in the step S1 to be subjected to a reaction under the action of phosphorus oxychloride, and obtaining the diaryl chlorinated triazine compound. According to the method, the final product can be obtained only through two-step reaction, raw materials are cheap, and expensive catalysts are not needed. The method has the characteristics of low cost, few steps, high yield, few three wastes, easiness in operation, environment friendliness, suitability for industrialization and the like.
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Paragraph 0037-0039
(2021/08/11)
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- Scalable Synthetic Strategy for Unsymmetrical Trisubstituted s-Triazines
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A scalable synthetic strategy to produce a large variety of unsymmetrical trisubstituted 1,3,5-triazines was developed. This protocol applied in situ formed acyl isocyanate from amide to react with amidine, introducing two substituents to the 1,3,5-triazinone ring with a low production cost and a simple workup procedure. The scalability of this method was demonstrated by translating a small-scale procedure to a multi-kilogram-scale synthesis. Chlorination and a further coupling reaction with various nucleophiles could provide unsymmetrical trisubstituted 1,3,5-triazines bearing diverse functional groups.
- Liang, Helong,Li, Ganzhong,Zhang, Lei,Wang, Gefei,Song, Mingyu,Li, Heng,Yuan, Bingxin
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p. 5821 - 5825
(2021/08/01)
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- Method for synthesizing 1, 3, 5-triazine derivative
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The invention relates to a method for synthesizing a 1, 3, 5-triazine derivative, which is used for synthesizing a 1, 3, 5-triazinone compound and a 2, 4, 6-trisubstituted-1, 3, 5-triazine compound containing three different substituent groups. Synthesis of the 1, 3, 5-triazinone compound comprises the following steps: taking amide, oxalyl chloride and amidine as reaction substrates, and heating for reaction; the synthesis method of the 2, 4, 6-trisubstituted-1, 3, 5-triazine compound containing three different substituent groups comprises the following synthesis steps: by taking amide, oxalyl chloride and amidine as reaction substrates, heating and reacting to obtain a 1, 3, 5-triazinone compound; reacting the 1, 3, 5-triazinone compound, phosphorus oxychloride and triethylamine in acetonitrile to generate a 2-chloro-4, 6-disubstituted 1, 3, 5-triazine compound; and coupling the 2-chloro-4, 6-disubstituted 1, 3, 5-triazine compound with various nucleophilic reagents, so that the 2, 4, 6-trisubstituted-1, 3, 5-triazine compound containing three different substituent groups is prepared. The method is wide in application range and relatively high in reaction yield, provides a new way for synthesis of the 1, 3, 5-triazine derivative, and has a relatively strong industrial application prospect.
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Paragraph 0109-0112
(2021/07/28)
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- A PROCESS FOR THE PREPARATION OF UV ABSORBERS
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The presently claimed invention relates to a novel, highly efficient and general process for the preparation of UV absorbers.
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Page/Page column 72-73
(2020/07/25)
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- Triazine compound
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PROBLEM TO BE SOLVED: To provide a novel triazine compound useful as an agent for arylmethylating a nucleophilic compound. SOLUTION: This invention relates to a compound represented by formula (I) [where each symbol is as defined in the specification], an
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Paragraph 0209-0211
(2016/12/01)
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- Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazines
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There is disclosed a process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazines, which comprises reacting the compound of formula STR1 wherein R is hydrogen, C1 -C4 alkyl or halogen, with urea, using a base selected from the class of the alkali metal hydrides, alkaline earth metal hydrides, or alkali metal amides, alkaline earth metal amides, or of the alkali metal C1 -C4 alcoholates in the presence of a polar solvent, to give the final products in a one step process in which the molar ratio of urea to base is 1:2 to 1:3 and the molar ratio of compound of formula (1) to urea is 2:1 to 5:1. 2-Hydroxy-4,6-diaryl-1,3,5-triazines are prepared in very good yield by the inventive process. The compounds are used as intermediates for the synthesis of UV absorbers.
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- Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazine
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There is disclosed a process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazines by reacting an aromatic nitrile with an alkali metal amide and an alkyl haloformate, using an equimolar amount of each, which process is carried out as a one-pot synthesis. The triazine derivatives obtained by the process of this invention are used as intermediates for the synthesis of UV absorbers.
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- Thermal Behaviour of 3-Phenyl-1,2,4-oxadiazol-5-ylhydrazines
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Depending on the substitution on the hydrazine moiety, thermolysis of 3-phenyl-1,2,4-oxadiazol-5-ylhydrazines (1)-(5) gives variable amounts of 1-amino-Δ2-1,2,4-triazolin-5-ones (13) or (17), Δ2- or Δ3-1,2,4-triazolin-5-ones (12), (18), or (19), and the s-triazine (20).A possible mechanism accounting for the products and the effects is discussed.A diradical intermediate and a hydrogen transfer from the reaction medium are suggested on the basis of the effect of benzoyl peroxide on the reaction and on the behaviour of the hydrazines (1)-(4) towards catalytic hydrogenation.
- Adembri, Giorgio,Camparini, Alfredo,Ponticelli, Fabio,Tedeschi, Piero
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p. 1703 - 1706
(2007/10/02)
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- 1,2,2,2-TETRACHLORO-1-ARYLETHYL ISOCYANATES
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The reaction of alkyl N-(1,2,2,2-tetrachloro-1-arylethyl)carbamates with phosphorus pentachloride or the photochemical chlorination of 2,2,2-trichloro-1-arylethyl isocyanates leads to 1,2,2,2-tetrachloro-1-arylethyl isocyanates.The latter were used for th
- Bal'on, Ya. G.,Smirnov, V. A.
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p. 648 - 653
(2007/10/02)
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