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Dehydrogenation of piperazine to pyrazine on oxide surfaces under chromatographic conditions

Chemistry of Heterocyclic Compounds volume 10, pages 1241–1245 (1974)Cite this article

Abstract

The conversion of piperazine under pulse-chromatographic conditions on catalysts — anhydrides of polyvalent acids and metal oxides of variable valence (P2O5, Cr2O3, MoO3, WO3, CuO, CoO, NiO, MoO3 + P2O5 andWO3 + B2O3 + CoO) —applied on Chromsorb W was investigated. The principal reaction direction in all cases is dehydrogenation of piperazine to pyrazine (90–94% yields). The most selective catalyst is CuO. The dehydrogenation is accompanied by slight hydrogenolysis to give ethylamine, diethylamine, methylpyrazine, and N-ethylpiperazine. The conversion of piperazine to P2O5 is characterized by the lowest activation energy on metal oxides.

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Authors and Affiliations

  1. Institute of Organic Synthesis, Academy of Sciences of the Latvian SSR, Riga

    S. P. Yurel', A. A. Anderson & M. V. Shimanskaya

Authors
  1. S. P. Yurel'
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  2. A. A. Anderson
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  3. M. V. Shimanskaya
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Additional information

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1414–1419, October, 1974.

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Yurel', S.P., Anderson, A.A. & Shimanskaya, M.V. Dehydrogenation of piperazine to pyrazine on oxide surfaces under chromatographic conditions. Chem Heterocycl Compd 10, 1241–1245 (1974). https://doi.org/10.1007/BF00470173

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  • DOI: https://doi.org/10.1007/BF00470173

Keywords

  • Activation Energy
  • Metal Oxide
  • Anhydride
  • P2O5
  • Dehydrogenation