Chemistry of Heterocyclic Compounds

, Volume 54, Issue 10, pp 946–950 | Cite as

Synthesis of spirocyclic 3Н-pyrrol-4-amines from 2H-azirines and 1-sulfonyl-1,2,3-triazoles

  • Adel R. Khaidarov
  • Nikolai V. Rostovskii
  • Galina L. Starova
  • Alexander F. Khlebnikov
  • Mikhail S. NovikovEmail author

The first derivatives of 3H-pyrrol-4-amines spiro-fused with fluorene or anthrone were synthesized in a Rh2(OAc)4-catalyzed reaction of 1-sulfonyl-1,2,3-triazoles with 2H-azirines. The reaction proceeds through 1,4-diazahexa-1,3,5-triene intermediates, which under the conditions employed cyclize to stable at room temperature 1,2-dihydropyrazines. At elevated temperatures, 1,2-dihydropyrazines are in ring-chain equilibrium with 1,4-diazahexa-1,3,5-trienes, which undergo irreversible 5-exo-trig cyclization, leading to spirocyclic derivatives of 3H-pyrrol-4-amine.


2Н-azirines diazo compounds pyrazines pyrroles spiro compounds 1,2,3-triazoles catalysis 


This work was supported by the Russian Foundation for Basic Research (projects No. 16-03-00596, 16-33-60130) and Saint Petersburg State University project (No. 12.40.1427.2017).

The analysis of the synthesized compounds was performed using the resource centers of Saint Petersburg State University ''Magnetic Resonance Research Center'', ''Center for X-ray Diffraction Studies'', ''Chemistry Educational Center'', and ''Chemical analysis and Materials Research Center''.

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Adel R. Khaidarov
    • 1
  • Nikolai V. Rostovskii
    • 1
  • Galina L. Starova
    • 1
  • Alexander F. Khlebnikov
    • 1
  • Mikhail S. Novikov
    • 1
    Email author
  1. 1.Institute of ChemistrySaint Petersburg State UniversitySaint PetersburgRussia

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