- Experimental and theoretical study on the regioselective synthesis and reaction of some bis- and poly(3-mercapto-1,2,4-triazin-5(4H)-one) derivatives
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The synthetic utility of 3-thioxo-1,2,4-triazin-5-ones 1 and 4-amino-3-mercapto-1,2,4-triazin-5(4H)-ones 2 as building blocks for novel bis- and poly(1,2,4-triazines) via alkylation with the corresponding bis- and poly(halo) compounds was investigated. Prediction of the site of alkylation has been confirmed using spectroscopic data. Theoretical calculation using hybrid density functional method wb97xd and 6-311++g(d,p) as basis set was implemented to investigate the reaction products energetics parameters. The atomic charges were calculated and discussed in details using three different methods. The transition state search were implemented to estimate the Gibbs free activation energy barrier of the reaction to emphasis the experimental results.
- Diab, Hadeer M.,Hassan, Walid M.I.,Abdelhamid, Ismail A.,Elwahy, Ahmed H.M.
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p. 244 - 261
(2019/07/31)
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- Synthesis and biological evaluation of 3,6-diaryl-7H-thiazolo[3,2-b] [1,2,4]triazin-7-one derivatives as acetylcholinesterase inhibitors
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Acetylcholinesterase (AChE) inhibitors played an important role in developing a cure for Alzheimer' s disease. In order to study on the influence of modifications at different groups and side chains on the AChE inhibitory ability and the active sites of 7
- Jin, Zhe,Yang, Liu,Liu, Si-Jie,Wang, Jian,Li, Shuo,Lin, Huang-Quan,Wan, David Chi Cheong,Hu, Chun
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p. 1641 - 1649
(2011/08/06)
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- Two regioisomers of condensed thio-heterocyclic triazine synthesized from 6-phenyl-3-thioxo-2,3,4,5-tetra-hydro-1,2,4-triazin-5-one
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In the crystal structure of 6-phenyl-3-thioxo-2,3,4,5-tetra-hydro-1,2,4- triazin-5-one, C9H7N3OS, (I), the 1,2,4-triazine moieties are connected by face-to-face contacts through two kinds of double hydrogen bonds (N - H...
- Hori, Akiko,Ishida, Yasuhide,Kikuchi, Takahiro,Miyamoto, Kumiko,Sakaguchi, Hiroshi
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experimental part
p. o593-o597
(2010/06/13)
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- TRIAZINE DERIVATIVES, THEIR PREPARATION AND THERAPEUTIC APPLICATION THEREOF
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The invention relates to triazine derivatives of general formula (I): Wherein R1, R2 and R3 are as defined herein. The invention also relates to a method for preparing these triazine derivatives and to the therapeutic application thereof.
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Page/Page column 5
(2008/06/13)
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- Reactions of 4-nitroso-1,2,4-triazine with derivatives of hydrazine
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The action of hydrazine on 4-nitroso-6-phenyl-1,2,4-triazine-3(2H)-thione-5-one results in the cleavage of the nitroso group. The action of phenylhydrazine results in the reduction of the double bond in the triazine ring together with the cleavage of the
- Mironovich
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p. 1224 - 1226
(2007/10/03)
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- Chemotherapeutic agents: Part XXVI - Synthesis and evaluation of π-deficient symmetrical and unsymmetrical triazines as antimalarials
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1,2,4-Triazine derivatives (3-6) have been prepared by the electrophilic substitution on 2.Symmetrical triazines 8 and 11 have been obtained by nucleophilic reaction of dicyandiamide with nitriles 7 and 9.
- Ram, Vishnu J.,Nath, Mahendra
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p. 423 - 426
(2007/10/03)
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- PALLADIUM-CATALYZED CYCLIZATION REACTIONS. UNICQUE SYNTHESIS OF CONDENSED THIAZOLES
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The facile synthesis of 3-methylene-2,3-dihydro-5H-thiazolopyrimidin-5-ones (9) has been performed by the catalytic action of a Pd(II) salt on 4-propargylthiopyrimidin-2(1H)-ones (6).Similar Pd(II)-catalyzed cyclization of 3-propargylthio-1,2,4-triazin-5(2H)-ones (10) gives 6-methylene-6,7-dihydro-4H-thiazolotriazin-4-ones (11) as a main product. 3-methylene-2,3-dihydro-7H-thiazolotriazin-7-ones (12), the regioisomers of 11, are provided by a base-catalyzed cyclization of 10.
- Mizutani, Masato,Sanemitsu, Yuzuru,Tamaru, Yoshinao,Yoshida, Zen-Ichi
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p. 305 - 314
(2007/10/02)
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- PALLADIUM-CATALYZED CYCLIZATION REACTIONS OF 3-PROPARGYLTHIO-1,2,4-TRIAZIN-5(2H)-ONES TO THIAZOLO-1,2,4-TRIAZINONES
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Selective transformation of 3-propargylthio-1,2,4-triazin-5(2H)-ones (1) to 6-methylene-6,7-dihydro-4H-thiazolo- triazin-4-ones (2) and 3-methylene-2,3-dihydro-7H-thiazolotriazin-7-ones (3) is performed under the conditions of Pd(II) salt or sodium hydroxide catalysis, respectively.
- Mizutani, Masato,Sanemitsu, Yuzuru,Tamaru, Yoshinao,Yoshida, Zen-ichi
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p. 1237 - 1240
(2007/10/02)
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- Syntheses of Thiazolo- and Thiazinotriazinones
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The syntheses of the thiazolo- and thiazinotriazinones 3 - 6 are described.Preparations of compounds 3 and 5 were achieved regiospecifically by using the compounds 12 and 13.
- Arndt, Friedrich,Franke, Wilfried,Klose, Walter,Lorenz, Joerg,Schwarz, Katica
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p. 1302 - 1307
(2007/10/02)
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