2-Bromo-1-(1H-pyrazol-4-yl)ethanone: versatile precursors for novel mono-, bis- and poly{6-(1H-pyrazol-4-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines}
作者:Mostafa E. Salem、Ahmed F. Darweesh、Ahmad M. Farag、Ahmed H.M. Elwahy
DOI:10.1016/j.tet.2015.12.024
日期:2016.2
A simple synthesis of novel mono-, bis- and poly6-(1H-pyrazol-4-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines} is reported. The formation of the target compounds was achieved by the reaction of 2-bromo-1-(5-methyl-1-phenyl-1H-pyrazol-4-yl)ethanone with the appropriate aminotriazolethiol or by the reaction of 6-pyrazolyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine-3-thiol with the appropriate di- and
新型单,双和聚6-(1 H-吡唑-4-基)-[1,2,4]三唑[3,4- b ] [1,3,4]噻二嗪的简单合成被报道。通过2-溴-1-(5-甲基-1-苯基-1 H-吡唑-4-基)乙酮与适当的氨基三唑硫醇的反应或6-吡唑基-的反应实现目标化合物的形成。7 H- [1,2,4]三唑并[3,4- b ] [1,3,4]噻二嗪-3-硫醇与适当的二-和聚(溴)化合物。通过光谱和元素分析确定了新合成化合物的结构。
Synthesis of novel scaffolds based on thiazole or triazolothiadiazine linked to benzofuran or benzo[<i>d</i>]thiazole moieties as new hybrid molecules
作者:Mostafa E. Salem、Ahmed F. Darweesh、Ahmed H. M. Elwahy
DOI:10.1080/00397911.2019.1694689
日期:2020.1.17
Abstract A synthesis of novel hybrid molecules containing thiazole or bis(thiazoles) each bearing benzofuran and/or benzo[d]thiazolemoieties by the reaction of the appropriate thioamide derivatives with the corresponding bis-bromoacetyl derivatives is reported. Mono- and bis(triazolothiadiazine) derivatives based on benzofuran or benzo[d]thiazolemoieties were also synthesized in good yields by the
prepared in 70-76% yield by the condensation reaction of 1,2-, 1,3-, and 1,4-bis(4-amino-5-mercapto-4H-1,2,4-triazol-3-yl)alkanes with bisaldehydes in acetic acid under reflux. Reaction of two of these azacrown macrocycles with iodomethane and benzyl chloride furnished exclusively the target lariat macrocycles in good yields. azacrown macrocycles - 1,2,4-triazole - thiols - bistriazoles - lariat crown
通过1,2-,1,3-和1,4-双(4-氨基-5-巯基-4 H -1,2,4-三唑的缩合反应,制备Azacrown大环化合物,收率为70-76%-3-基)烷烃与双醛在乙酸中回流。这些两个氮杂皇冠大环与碘甲烷和苄基氯的反应以高收率完全提供了目标套索大环。 氮杂皇冠大环-1,2,4-三唑-硫醇-双三唑-套索冠醚
Synthesis and comparison of bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)butane using DFT study
作者:S. Subashchandrabose、Akhil. R. Krishnan、H. Saleem、S. Kavitha、V. Thanikachalam、G. Manikandan
DOI:10.1016/j.molstruc.2010.12.048
日期:2011.6
Abstract In this work, we report a combinedexperimental and theoreticalstudies on molecular structure, vibrational spectra and NBO analysis of bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)butane (BAMTB). The FT-Raman and FT-IR spectra of BAMTB were recorded in the solid phase. The molecular geometry, harmonic vibrational frequencies and bonding features of BAMTB in the ground state have been calculated
The facile preparation of bis(4-amino-5-mercapto-1,2,4-triazol-3-yl)alkanes 1a–d and bis(5-mercapto-4H-1,2,4-triazol-3-yl)alkanes 2a–d in one-step is described.