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Keywords:

  • cyclopropanes;
  • domino reactions;
  • donor–acceptor systems;
  • pyrroles;
  • ring enlargement
Thumbnail image of graphical abstract

Multiple displacement of oxygen: Electron-rich oligopyrroles and pyrrolo[3,2-e]indoles are generated by a domino process induced by donor–acceptor-substituted cyclopropanes. Up to seven molecules of water are eliminated, thus allowing the introduction of nitrogen and aromaticity.