5418-07-5Relevant articles and documents
METHOD FOR PRODUCING 2-AMINO-1,3,5-TRIAZINE COMPOUND
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Paragraph 0076-0082, (2020/10/21)
PROBLEM TO BE SOLVED: To provide a method for producing 2-amino-4,6-di-substituted 1,3,5-triazine simply and under a mild condition. SOLUTION: Guanidine or a salt thereof is added to a mixture including a nitrile compound and a base and reacted therewith to produce 2-amino-4,6-di-substituted 1,3,5-triazine. Alternatively, a mixture (or a mixed liquid) including guanidine or a salt thereof and a solvent may be added to a mixture (or a mixed liquid) including a nitrile compound, a base and a solvent and reacted therewith. The base may be an alkali metal hydride, for example, sodium hydride. After completing the reaction, a step of depositing a deposit by adding a poor solvent to the reaction mixture and a step of separating the deposited deposit may be included. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
A PROCESS FOR THE PREPARATION OF UV ABSORBERS
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Page/Page column 73, (2020/07/25)
The presently claimed invention relates to a novel, highly efficient and general process for the preparation of UV absorbers.
Organic optoelectronic material and application thereof
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Paragraph 0057-0060; 0077-0080; 0082-0085, (2019/10/23)
The invention belongs to the scientific and technical field of optoelectronic material application, and particularly relates to an organic photoelectric material and application thereof. The organic photoelectric material comprises phenanthroimidazole and
SYNTHESIS OF NITROGEN HETEROCYCLES FROM 1-METHYLTHIO-2-PHENYL-2-AZABUTA-1,3-DIENE-4,4-DICARBONITRILES
Lorente, Antonio,Gamez, Pedro,Mar Contreras, Maria del
, p. 113 - 124 (2007/10/02)
The reactions of title compounds with different nucleophiles afforded a simple method for a synthesis of pyrimidines, 1,2,4-triazoles, 1,2,4-oxadiazoles and 1,3,5-triazines.
A potassium amide induced ring transformation of 1,2,4-triazines into 1,2,4-triazoles and 1,3,5-triazines
Rykowski,Van Der Plas
, p. 71 - 73 (2007/10/02)
5-Phenyl- and 3,5-diphenyl-1,2,4-triazine, when treated with potassium amide in liquid ammonia, are converted into a mixture of phenyl derivatives of 1,2,4-triazole and amino-1,3,5-triazines. The ring contraction of the 1,2,4-triazine ring into the 1,2,4-triazole ring has been explained by an initial addition of the amide ion to C-6, ring opening by fission of the N1-C6 bond and ring closure (ANRORC-mechanism). The transformation of the 1,2,4-triazine ring into the 1,3,5-triazine ring has been studied by means of 15N-labeled potassium amide. It was found that the nitrogen of the amide ion becomes one of the ring nitrogen atoms in the 1,3,5-triazine ring and that the exocyclic amino group is imlabeled. Based on these 15N-labeling studies, it is proposed that this ring transformation starts with an initial addition of the amide ion to C-5, ring opening between C-5 and C-6, a dehydrogenative rearrangement of the open-chain intermediate 1-amino-2,4,5-triazahexatriene into 1-amino-4-cyano-2,4-diaza-1,3-butadiene, and ring closure.
On the Amination of Azaheterocycles. A New Procedure for the Introduction of an Amino Group
Hara, Hiroshi,Plas, Henk C. van der
, p. 1285 - 1287 (2007/10/02)
A new method of amination of diazines and triazines, using potassium amide, liquid ammonia and potassium permanganate, has been described.
Ring Transformations and Amination in Reactions of 3-Halogeno-5-phenyl-1,2,4-triazines with Potassium Amide in Liquid Ammonia
Rykowski, A.,Plas, H. C. van der
, p. 881 - 885 (2007/10/02)
The reactions of 3-X-5-phenyl-1,2,4-triazines (X = fluoro, chloro, bromo, iodo) toward potassium amide/liquid ammonia were studied.Whereas the 3-fluoro compound gives only the 3-amino derivative, the 3-chloro, 3-bromo, and 3-iodo compounds yield a complex mixture containing, besides 3-amino-5-phenyl-1,2,4-triazine and 5-phenyl-1,2,4-triazine, ring transformation products, i.e., 3,5-diphenyl-1,2,4-triazine, 2,4-diphenyl-1,3,5-triazine, 6-amino-2,4-diphenyl-1,3,5-triazine, and 3-X-5-phenyl-1,2,4-triazole.Evidence is found that in the ring transformation of 3-X-5-phenyl-1,2,4-triazines into 2,4-diphenyl-1,3,5-triazines, benzamidine must be an intermediate.The mechanisms of the amination and ring transformation are extensively discussed.