Synthesis 2022; 54(11): 2635-2646
DOI: 10.1055/a-1742-2736
paper

δ-Keto Aminoacrylonitriles and δ-Keto Aminoenones from 1-Pyrrolines, Cyanoacetylenes, and Acetylenic Ketones

Authors

  • Ludmila A. Oparina

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation
  • Anastasiya G. Mal’kina

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation
  • Nikita A. Kolyvanov

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation
  • Igor A. Ushakov

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation
  • Ivan V. Saliy

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation
  • Konstantin A. Apartsin

    b   Biomedical Research and Technology Department of the Irkutsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 134 Lermontov Str., 664033 Irkutsk, Russian Federation
  • Boris A. Trofimov

    a   A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russian Federation

This work was carried out with the financial support from the Ministry of Science and Higher Education of the Russian Federation (No. AAAA-A16-116112510005-7).


Graphical Abstract

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Abstract

The ring-opening/functionalization of 1-pyrrolines by cyano­acetylenes or acetylenic ketones (20–80 °C, MeCN, H2O) affords δ-keto aminoacrylonitriles and δ-keto aminoenones, mostly as the Z-isomers, in up to 85% yields. The synthesis involves C(2)–N bond cleavage in the intermediate hemiaminal resulting from the intermediate 1,3(4)-dipolar 1-pyrroline/acetylene complexes and water.

Supporting Information



Publikationsverlauf

Eingereicht: 09. Dezember 2021

Angenommen nach Revision: 17. Januar 2022

Accepted Manuscript online:
17. Januar 2022

Artikel online veröffentlicht:
07. März 2022

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