Stereochemistry of some spiropyrazolines and spiroisoxazolines

Gábor Tóth, Barbara Balázs, Albert Lévai, Lubor Fišera, Eva Jedlovská

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The stereochemistry and conformational behaviour of spiropyrazoline and spiroisoxazoline derivatives (2-5) obtained by regio- and stereoselective cycloaddition of 1 (2-arylidene-1-tetralone, 3-arylidene-1-thiochromanone, chromanone and -flavanone) to C-2-(5-nitrofuryl)-N-methylnitrile imine, C-2- (5-nitrofuryl)-N-phenylnitrile imine, C-(4-nitrophenyl)-N-methylnitrile imine and 4-nitrobenzonitrile oxide were investigated by one- and two-dimensional 1H, 13C and 15N NMR spectroscopy. The sites of the conformational equilibria were also evaluated.

Original languageEnglish
Pages (from-to)29-36
Number of pages8
JournalJournal of Molecular Structure
Issue number1-3
Publication statusPublished - Sep 14 1999



  • C and N NMR spectroscopy
  • Conformation
  • H
  • Stereochemistry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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