SYNTHESIS AND TAUTOMERISM OF 2-(3,5-DIARYL-1H-PYRAZOL-4-YL)-1-METHYL-1H-BENZIMIDAZOLES

Authors

  • И. Б. Дзвинчук Institute of Organic Chemistry, National Academy of Sciences, Kiev 02094
  • М. О. Лозинский Institute of Organic Chemistry, National Academy of Sciences, Kiev 02094

DOI:

https://doi.org/10.1007/6198

Keywords:

aroylhydrazines, benzimidazoles, pyrazoles, tautomerism

Abstract

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.

How to Cite
Dzvinchuk, I. B.; Lozinskii, M. O.  Chem. Heterocycl. Compd. 2011, 46, 1454. [Khim. Geterotsikl. Soedin. 2010, 1800.]

For this article in the English edition see DOI 10.1007/s10593-011-0691-6

 

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Published

2021-03-19

Issue

No. 12 (2010)

Section

Original Papers