Synthesis and tautomerism of 2-(3,5-diaryl-1H-pyrazol-4-yl)-1-methyl-1H-benzimidazoles

被引：0
|
作者：
I. B. Dzvinchuk
M. O. Lozinskii
机构：
[1] National Academy of Sciences,Institute of Organic Chemistry
来源：
Chemistry of Heterocyclic Compounds | 2011年 / 46卷
关键词：
aroylhydrazines; benzimidazoles; pyrazoles; tautomerism;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The cyclocondensation of 1-methyl-2-phenacyl-1H-benzimidazole with aroylhydrazines yields 2-(3,5-diaryl-1H-pyrazol-4-yl)-1-methyl-1H-benzimidazoles. The 1H NMR spectra indicate that these products display tautomerism. The more stable tautomers have structures containing electron-donor aryl substituents at C-5 and electron-withdrawing aryl substituents at C-3 of the pyrazole ring.
引用
收藏
相关论文
共 50 条
  • [1] SYNTHESIS AND TAUTOMERISM OF 2-(3,5-DIARYL-1H-PYRAZOL-4-YL)-1-METHYL-1H-BENZIMIDAZOLES
    Dzvinchuk, I. B.
    Lozinskii, M. O.
    CHEMISTRY OF HETEROCYCLIC COMPOUNDS, 2011, 46 (12) : 1454 - 1458
  • [2] SYNTHESIS AND ISOMERISM OF 2-(3,5-DIARYL-1H-PYRAZOL-4-YL)-1H-BENZIMIDAZOLES
    Dzvinchuk, I. B.
    Turov, A. V.
    Lozinskii, M. O.
    CHEMISTRY OF HETEROCYCLIC COMPOUNDS, 2009, 45 (11) : 1325 - 1330
  • [3] Synthesis and isomerism of 2-(3,5-diaryl-1H-pyrazol-4-yl)-1H-benzimidazoles
    I. B. Dzvinchuk
    A. V. Turov
    M. O. Lozinskii
    Chemistry of Heterocyclic Compounds, 2009, 45 : 1325 - 1330
  • [4] Synthesis and tautomerism of 2-[3(5)-aryl(methyl)pyrazol-4-yl]-1H-benzimidazoles
    Dzvinchuk, I. B.
    Lozinskii, M. O.
    KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII, 2006, (09): : 1370 - 1377
  • [5] Straightforward Synthesis of 2-(1H-Pyrazol-4-yl)-1H-benzimidazoles
    A. A. Shatrova
    Russian Journal of Organic Chemistry, 2022, 58 : 805 - 809
  • [6] Straightforward Synthesis of 2-(1H-Pyrazol-4-yl)-1H-benzimidazoles
    Shatrova, A. A.
    RUSSIAN JOURNAL OF ORGANIC CHEMISTRY, 2022, 58 (06) : 805 - 809
  • [7] Recyclization of 2-(3,6-diaryl-2,5-dihydropyridazin-4-yl)-1H-benzimidazoles to 2-[(3,5-diarylpyrazol-4-yl)methyl]-1H-benzimidazoles
    I. B. Dzvinchuk
    A. N. Chernega
    M. O. Lozinskii
    A. A. Tolmachev
    Chemistry of Heterocyclic Compounds, 2008, 44 : 682 - 689
  • [8] RECYCLIZATION OF 2-(3,6-DIARYL-2,5-DIHYDROPYRIDAZIN-4-YL)-1H-BENZIMIDAZOLES TO 2-[(3,5-DIARYLPYRAZOL-4-YL)METHYL]-1H-BENZIMIDAZOLES
    Dzvinchuk, I. B.
    Chernega, A. N.
    Lozinskii, M. O.
    Tolmachev, A. A.
    CHEMISTRY OF HETEROCYCLIC COMPOUNDS, 2008, 44 (06) : 682 - 689
  • [9] Synthesis and tautomerism of 2-[3(5)-aryl(methyl)pyrazol-4-yl]-1- benzimidazoles
    Dzvinchuk I.B.
    Lozinskii M.O.
    Chemistry of Heterocyclic Compounds, 2006, 42 (9) : 1190 - 1196
  • [10] Cyclocondensation of 2-phenacyl-1H-benzimidazole with acylhydrazines: Synthesis and tautomerism of 2-(pyrazol-4-yl)-1h-benzimidazoles
    Dzvinchuk I.B.
    Vypirailenko A.V.
    Pirozhenko V.V.
    Lozinsky M.O.
    Chemistry of Heterocyclic Compounds, 1999, 35 (11) : 1319 - 1324
12345