SYNTHESIS AND TAUTOMERISM OF 5,7-DIARYL-3-CYANO- AND 5,7-DIARYL-3-ETHOXYCARBONYL-4,7(6,7)-DIHYDROPYRAZOLO[1,5-<i>a</i>]PYRIMIDINES

Authors

  • В. В. Липсон V. Danilevsky Institute of Endocrine Pathology Problems, Academy of Medical Sciences of Ukraine, Kharkiv 61002
  • С. М. Десенко STC Institute of Single Crystals, Kharkiv 61001
  • В. В. Бородина V. Danilevsky Institute of Endocrine Pathology Problems, Academy of Medical Sciences of Ukraine, Kharkiv 61002
  • М. Г. Широбокова V. Danilevsky Institute of Endocrine Pathology Problems, Academy of Medical Sciences of Ukraine, Kharkiv 61002

DOI:

https://doi.org/10.1007/7315

Keywords:

dihydropyrazolo[1, 5-a]pyrimidine system, synthesis, imino–enamine tautomerism

Abstract

The cyclocondensation of 3-amino-4-cyanopyrazole and 3-amino-4-ethoxycarbonylpyrazole with 1,3-diaryl-2,3-propen-1-ones gives the corresponding 3-substituted 5,7-diaryl-4,7(6,7)-dihydro-pyrazolo[1,5-a]pyrimidines. Their tautomeric composition in solution has been investigated by 1H NMR.

How to Cite
Lipson, V. V.; Desenko, S. M.; Borodina, V. V.; Shirobokova, M. G.  Chem. Heterocycl. Compd. 2007, 43, 1544. [Khim. Geterotsikl. Soedin. 2007, 1824.]

For this article in the English edition see DOI 10.1007/s10593-007-0239-y

 

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Published

2023-01-16

Issue

No. 12 (2007)

Section

Original Papers