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Chemistry of Heterocyclic Compounds

, Volume 28, Issue 3, pp 266–268 | Cite as

Synthesis of 4H-pyrans by O-cyclization of 1,5-diketones

  • A. F. Blinokhvatov
  • O. V. Markovtseva
  • M. N. Nikolaeva
Article

Abstract

Substituted 4H-pyrans were obtained in high preparative yields by the reaction of 1,5-diketones with acetic anhydride and boron trifluoride etherate in diethyl ether. It is assumed that the heterocyclization of 1,5-diketones includes a step involving the formation and transformations of an acyloxy carbonium ion.

Keywords

Acetic Ether Organic Chemistry Boron Anhydride 
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 1992

Authors and Affiliations

  • A. F. Blinokhvatov
    • 1
  • O. V. Markovtseva
    • 1
  • M. N. Nikolaeva
    • 1
  1. 1.Penza Agricultural InstitutePenza

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