Russian Journal of General Chemistry

, Volume 89, Issue 10, pp 2151–2153 | Cite as

Intramolecular 6-endo-dig-Cyclization of Ethyl 5-Aminomethyl-4-(1,2,3-thiadiazol-4-yl)furan-2-carboxylate

  • Yu. O. Remizov
  • L. M. PevznerEmail author
  • M. L. Petrov
Letters to the Editor


The reaction of 5-aminomethyl-4-(1,2,3-thiadiazol-4-yl)furan-2-carboxylic acid ethyl ester with bases has given ethyl 5-sulfanylidene-4,5,6,7-tetrahydrofuro[2,3-c]pyridine-2-carboxylate as a result of intramolecular 6-endo-dig-cyclization of thioketene generated in situ with an internal CH2NH2 nucleophile. The obtained ester has been alkylated with iodomethane at the sulfur atom to form ethyl 5-methylsulfanyl-4,7-dihydrofuro[2,3-c] pyridine-2-carboxylate. The Hantzsch reaction with ω-bromoacetophenone has resulted in the formation of 7-ethoxycarbonyl-3-phenylfuro[3,2-d[1,3]thiazolo[3,2-a]pyridin-4-ium bromide.


1,2,3-thiadiazoles 4-(furan-3-yl)-1,2,3-thiadiazoles furo[2,3-c]pyridines 1,3-thiazolium salts 1,3-thiazolo[3,2-a]pyridines 


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This study was carried out in the scope of the basic part of state project of Ministry of Education and Science of Russian Federation (project no. 4.5554.2017/8.9) using the equipment of the Engineering Center of St. Petersburg State Institute of Technology (Technical University).

Conflict of Interest

No conflict of interest was declared by the authors.


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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • Yu. O. Remizov
    • 1
  • L. M. Pevzner
    • 1
    Email author
  • M. L. Petrov
    • 1
  1. 1.St. Petersburg State Institute of TechnologyTechnical UniversitySt. PetersburgRussia

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