Chemistry of Heterocyclic Compounds

, Volume 11, Issue 4, pp 431–436 | Cite as

Condensed heteroaromatic systems including a thiophene ring. XXXIII. Catalytic liquid-phase oxidation of 3-methyl-substituted thieno[2,3-b]thiophenes and thieno[3,2-b]thiophenes

  • V. P. Litvinov
  • T. V. Shchedrinskaya
  • P. A. Konstantinov
  • Ya. L. Gol'dfarb
Article

Abstract

It is shown that the catalytic liquid-phase oxidation of 3-methylthieno[2,3-b]-thiophene and 3-methylthieno[3,2-b]thiophene in acetic acid in the presence of cobalt acetate and sodium bromide at 90–110° gives thieno[2,3-b]thiophene-3-carboxylic acid and thieno[3,2-b]-3-formylthiophene, respectively.

Keywords

Oxidation Sodium Acetate Acetic Acid Cobalt 

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Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • V. P. Litvinov
    • 1
    • 2
  • T. V. Shchedrinskaya
    • 1
    • 2
  • P. A. Konstantinov
    • 1
    • 2
  • Ya. L. Gol'dfarb
    • 1
    • 2
  1. 1.N. D. Zelinskii Institute of Organic ChemistryAcademy of Sciences of the USSRMoscow
  2. 2.Moscow Physicotechnical InstituteUSSR

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