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


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.


Acetic Ether Organic Chemistry Boron Anhydride 
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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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