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Keywords:

  • N-acyliminium;
  • erythrina alkaloids;
  • Pictet-Spengler reaction;
  • singlet oxygen;
  • sustainable chemistry
Thumbnail image of graphical abstract

All-in-one: A new and general one-pot reaction sequence initiated by singlet oxygen that transforms simple furan substrates into complex nitrogen-bearing aromatic polycycles having all the structural features of a number of important natural products (for example, the erythrina alkaloids; see scheme, RB=rose Bengal) is reported. The reaction sequence itself uses mild conditions and has wide functional group tolerance.