Imine-enamine tautomerization of dihydroazolopyrimidines. 4. Synthesis and tautomerization of 5-(2-hydroxyphenyl)-dihydro-1,2,4-triazolo[1,5-<i>a</i>]pyrimidines

Authors

  • C. M. Десенко Kharkov State University, Kharkov 310077
  • В. Д. Орлов Kharkov State University, Kharkov 310077
  • Н. В. Гетманский Kharkov State University, Kharkov 310077
  • C. А. Комыхов Kharkov State University, Kharkov 310077

Abstract

The condensation of 3-amino-1,2,4-triazole with 2′-hydroxychalcones gives 7-aryl-5-(2-hydroxyphenyl)-4,7(6,7)-dihydro-1,2,4-triazolo[1,5-a]pyrimidines. Both tautomeric forms were isolated for a number of these compounds. PMR spectroscopy was used to show that the enamine form is predominant in DMSO in contrast to the case in CHCl3.

How to Cite
Desenko, S. M.; Orlov, V. D.; Getmanskii, N. V.; Komykhov, S. A. Chem. Heterocycl. Compd. 1993, 29, 1160. [Khim. Geterotsikl. Soedin. 1993, 1353.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF00538061

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Published

1993-10-25

Issue

No. 10 (1993)

Section

Original Papers