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Chemistry of Heterocyclic Compounds

, Volume 16, Issue 6, pp 640–644 | Cite as

Tautomerism of azine derivatives. 4. Keto-enol tautomerism of β-keto esters of the azine series

  • S. A. Stekhova
  • O. A. Zagulyaeva
  • V. V. Lapachev
  • V. P. Mamaeva
Article
  • 35 Downloads

Abstract

The structures of pyrazinoyl-, 3-pyridazinoyl-, 4-pyrimidoyl-, and 2-, 3-, and 4-pyridoylacetic esters were studied by means of IR, NMR, and1H and13C NMR spectroscopy and quantum-chemical calculations (Pariser-Parr-Pople and CNDO/2). The effect of solvents (including strongly and weakly basic solvents) on the position of the tautomeric equilibria of these β-keto esters was studied. The o+ constants for the keto and enol fragments were estimated by means of quantum-chemical calculations and13C NMR spectroscopy.

Keywords

Spectroscopy Ester Organic Chemistry Enol Azine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • S. A. Stekhova
    • 1
  • O. A. Zagulyaeva
    • 1
  • V. V. Lapachev
    • 1
  • V. P. Mamaeva
    • 1
  1. 1.Novosibirsk Institute of Organic Chemistry, Siberian BranchAcademy of Sciences of the USSRNovosibirsk

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