CONDENSATION OF SULFUR CONTAINING PYRIDINE SYSTEMS. 2. SYNTHESIS AND METHYLATION OF TRIETHYLAMMONIUM 1-CYANO-4,5-DIOXO-3,4,5,6-TETRAHYDRO[1]BENZOPYRANO[3,4-<i>c</i>]PYRIDINE-2-THIOLATE

Authors

  • В. В. Доценко V. Dal East-Ukrainian National University, Lugansk 91034
  • С. Г. Кривоколыско V. Dal East-Ukrainian National University, Lugansk 91034
  • В. П. Литвинов N. D. Zelinsky Organic Chemistry Institute, Russian Academy of Sciences, Moscow 117913

DOI:

https://doi.org/10.1007/8303

Keywords:

[1]benzopyrano[3, 4-c]pyridinethiolate, cyanothioacetamide, 3-carbethoxycoumarin, methylation

Abstract

Treatment of 3-carbethoxycoumarin  with  cyanothioacetamide in refluxing i-PrOH in the presence of excess Et3N  gave  the previously unknown triethylammonium 1-cyano-4,5-dioxo-3,4,5,6-tetrahydro[1]benzopyrano[3,4-c]pyridine-2-thiolate. Its methylation has been studied and  occurs regioselectively to give the corresponding S-methylation product.

How to Cite
Dotsenko, V. V.; Krivokolysko, S. G.; Litvinov, V. P.  Chem. Heterocycl. Compd. 2005, 41, 635. [Khim. Geterotsikl. Soedin. 2005, 737.]

For this article in the English edition, see DOI 10.1007/s10593-005-0195-3


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Published

2023-11-14

Issue

No. 5 (2005)

Section

Original Papers