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A convenient synthesis of tetrahydro-1Н-thieno-[3,2-с]pyrazole 4,4-dioxides

  • Irina E. EfremovaEmail author
  • Anna V. Serebryannikova
  • Lidiya V. Lapshina
  • Vladislav V. Gurzhiy
  • Arkadii E. Ryabin
Article
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The reaction of oxidation of 3-aryl-6a-methyl-6-nitrohexahydrothieno[2,3-d]pyrazole 4,4-dioxides by bromine was used to synthesize their derivatives 3-aryl-6a-methyl-6-nitro-3a,5,6,6a-tetrahydro-1H-thieno[3,2-c]pyrazole 4,4-dioxides, the structure of which was established by IR, 1H, 13C, 1H–13C HMQC, 1H–13C HMBC spectroscopy and X-ray structural analysis.

Keywords

pyrazolidines pyrazolines sulfolanes thieno[2,3-d]pyrazole 4,4-dioxides oxidation 

Supplementary material

10593_2019_2556_MOESM1_ESM.pdf (2.1 mb)
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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Irina E. Efremova
    • 1
    Email author
  • Anna V. Serebryannikova
    • 2
  • Lidiya V. Lapshina
    • 3
  • Vladislav V. Gurzhiy
    • 4
  • Arkadii E. Ryabin
    • 1
  1. 1.Herzen State Pedagogical University of RussiaSaint PetersburgRussia
  2. 2.Institute of ChemistrySaint Petersburg State UniversitySaint PetersburgRussia
  3. 3.S. M. Kirov Military Medical AcademySaint PetersburgRussia
  4. 4.Saint Petersburg State UniversitySaint PetersburgRussia

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