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Keywords:

  • aminoanilides;
  • native chemical ligation;
  • peptides;
  • solid-phase synthesis;
  • thioester
Thumbnail image of graphical abstract

Intramolecular activation of C-terminal peptides: Mildly activated N-acylurea peptides are readily formed on the solid support following chain assembly, avoiding over-activation of the C-terminus. The utility of these peptides is demonstrated by the native chemical ligation of unprotected peptides (see scheme; R=amino acid side chain).