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Chemistry of Natural Compounds

, Volume 43, Issue 1, pp 15–18 | Cite as

Modified coumarins. 26. Synthesis of angular dihydrooxazinocoumarins from 3-hydroxy[b,d]pyran-6-one

  • I. V. Nagorichna
  • M. M. Garazd
  • Ya. L. Garazd
  • V. P. Khilya
Article

Abstract

N-Substituted angular pyranodihydrobenzoxazines were prepared by condensation of 3-hydroxy-dibenzo[b,d]pyran-6-one with various primary amines and two equivalents of formaldehyde in the presence of 4-N,N-dimethylaminopyridine as base.

Key words

coumarins dibenzo[b,d]pyran-6-ones Mannich reaction pyranodihydrobenzoxazines 

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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • I. V. Nagorichna
    • 1
  • M. M. Garazd
    • 1
  • Ya. L. Garazd
    • 2
  • V. P. Khilya
    • 2
  1. 1.Institute of Bioorganic and Petroleum ChemistryNational Academy of Sciences, UkraineKievUkraine
  2. 2.Taras Shevchenko Kiev National UniversityKievUkraine

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