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Chemistry of Heterocyclic Compounds

, Volume 6, Issue 7, pp 936–936 | Cite as

2-Benzopyrylium salts containing thiophene substituents in positions 1 and 3

  • G. N. Dorofeenko
  • S. V. Krivun
  • E. I. Sadekova
  • V. I. Beletskaya
Letters to the Editor
  • 32 Downloads

Abstract

2-Benzopyrylium salts containing heterocyclic substituents have not previously been known. In order to obtain 2-benzopyrylium salts containing thiophene substituents in position 3, we have studied the acylation of 3,4-dimethoxybenzyl 2-thienyl ketone (I), which was obtained with a yield of 36% by the acylation of thiophene (at 75° C) with homoveratric acid in the presence of polyphosphoric acid (PPA). Compound I forms yellow crystals with mp 74–75° C (from benzene), bp 220° C (6mm). Found %: C 63.40; H 5.38; S 13.55. C11H13O3S. Calculated %: C 64.12; H 5.34; S13.21.

Keywords

Benzene Organic Chemistry Ketone Thiophene Yellow Crystal 
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.

Literature cited

  1. 1.
    G. N. Dorofeenko, A. D. Semenov, V. I. Dulenko, and S. V. Krivun, ZhOrKh, 2, 1492 (1966).Google Scholar

Copyright information

© Plenum Publishing Corporation 1973

Authors and Affiliations

  • G. N. Dorofeenko
    • 1
  • S. V. Krivun
    • 1
  • E. I. Sadekova
    • 1
  • V. I. Beletskaya
    • 1
  1. 1.Rostov-on-Don State UniversityUSSR

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