Front Cover: Katritzky Salts for the Synthesis of Unnatural Amino Acids and Late‐Stage Functionalization of Peptides (Eur. J. Org. Chem. 12/2023)

The Front Cover shows chalkboard drawings of recent advances in the use of Katritzky salts as intermediates for the synthesis of unnatural amino acids, late-stage functionalization of peptides, and macrocyclization. Thanks to the progress made in deaminative strategies using Katritzky salts, a variety of radical alkylation methods have been developed in the peptide chemistry field. Peptide drug development will greatly benefit from the novel methodologies to expand the chemical space explored around peptides and biomolecules. Cover design realized by Yousif. More information can be found in the Review by A. M. Yousif et al.