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Keywords:

  • amides;
  • azides;
  • carboxylic acids;
  • homogeneous catalysis;
  • Staudinger ligation
Thumbnail image of graphical abstract

Redox catalysis: Aryl amides, imides, lactams, and dipeptides are obtained through a direct Staudinger ligation mediated by phosphine-based redox catalysis (see scheme). Mechanistic studies indicate the involvement of a phosphonium carboxylate intermediate that leads to a 1,3-acyl migration and thus results in C[BOND]N bond formation.