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Russian Chemical Bulletin

, Volume 60, Issue 10, pp 2027–2029 | Cite as

Synthesis of quinolizin-2-one and pyrido[1,2-a]azepin-2-one derivatives from difluoroboron complexes of aroylacetones and O-methyllactims

  • I. V. Kravtsov
  • S. V. Baranin
  • P. A. Belyakov
  • V. A. Dorokhov
Full Articles

Abstract

O-Methyllactims react at the methyl group of difluoroboron complexes of aroylacetones with the formation of condensation products, novel difluoroboron chelates of 1-aryl-4-(piperi-din-2-ylidene)butane-1,3-diones and 1-aryl-4-(azepan-2-ylidene)butane-1,3-diones, which upon the action of concentrated HCl in ethanol are transformed into the corresponding quino-lizin-2-one and pyrido[1,2-a]azepin-2-one derivatives.

Key words

O-methyllactims difluoroboron chelates of aroylacetones condensation 1-aryl-4-(piperidin-2-ylidene)butane-1,3-diones 1-aryl-4-(azepan-2-ylidene)butane-1,3-diones quinolizin-2-ones pyrido[1,2-a]azepin-2-ones 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • I. V. Kravtsov
    • 1
  • S. V. Baranin
    • 1
  • P. A. Belyakov
    • 1
  • V. A. Dorokhov
    • 1
  1. 1.N. D. Zelinsky Institute of Organic ChemistryRussian Academy of SciencesMoscowRussian Federation

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