Synthesis and conformational analysis of phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]- and 1,2,3-oxathiazino[4,3-a]isoquinolines

Ildikó Schuster, Andreas Koch, Matthias Heydenreich, Erich Kleinpeter, László Lázár, Ferenc Fülöp

Research output: Contribution to journalArticle

3 Citations (Scopus)


Through the ring closures of tetrahydroisoquinoline 1,3-amino alcohols bearing a phenyl group in the side-chain, diastereomers of novel 1- or 2-phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]isoquinoline 4-oxides, and 1,2,3-oxathiazino[4,3-a]isoquinoline 4-oxides and 4,4-dioxides were prepared. NMR analysis and DFT calculations on the prepared tetrahydroisoquinoline-condensed 1,2,3-heterocycles revealed that their conformational equilibria of cis1-trans-cis2 type are influenced by the relative configuration of P-4 in the 1,3,2-oxazaphosphinanes, and by the position of the phenyl group in the 1,2,3-oxathiazines.

Original languageEnglish
Pages (from-to)124-137
Number of pages14
JournalJournal of Molecular Structure
Issue number1-3
Publication statusPublished - Oct 15 2008


  • Conformational analysis
  • Fused-ring systems
  • Molecular modelling
  • Phosphorus heterocycles
  • Sulfur heterocycles

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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