SYNTHESIS OF SUBSTITUTED 6-AMINO-4-ARYL-5-CYANO-2H,4H-PYRANO[2,3-<i>c</i>]PYRAZOLES. CRYSTAL AND MOLECULAR STRUCTURE OF 6-AMINO-5-CYANO-3-METHYL-4-(2',4',6'-TRIETHYLPHENYL)-2H,4H-PYRANO[2,3-<i>c</i>]PYRAZOLE

Authors

  • А. М. Шестопалов N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991
  • А. П. Якубов N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991
  • Д. В. Цыганов N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991
  • Ю. М. Емельянова N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991
  • В. Н. Нестеров Институт элементоорганических соединений им. А. Н. Несмеянова РАН, Москва 117813

Keywords:

Michael adduct, pyrazole, pyran, pyranopyrazole, X-ray crystallographic analysis

Abstract

Substituted 6-aminopyrano[2,3-c]pyrazoles were synthesized by the two-component condensation of arylidenemalononitriles and substituted 5-pyrazolones or three-component condensation of aromatic aldehydes, malononitrile, and substituted 5-pyrazolones. It was established by X-ray crystallographic analysis that pyranopyrazoles exist in the 2H and not the 1H tautomeric form.

How to Cite
Shestopalov, A. M.; Yakubov, A. P.; Tsyganov, D. V.; Emel'yanova,  Yu. M.; Nesterov, V. N. Chem. Heterocycl. Compd. 2002, 38, 1180. [Khim. Geterotsikl. Soedin. 2002, 1345.]

For this article in the English edition, see DOI https://doi.org/10.1023/A:1021773228201

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Published

2002-10-25

Issue

No. 10 (2002)

Section

Original Papers