Creating Diversity by Site-Selective Peptide Modification: A Customizable Unit Affords Amino Acids with High Optical Purity

Abstract

The development of peptide libraries by site-selective modification of a few parent peptides would save valuable time and materials in discovery processes, but still is a difficult synthetic challenge. Herein natural hydroxyproline is introduced as a “convertible” unit for the production of a variety of optically pure amino acids, including expensive <i>N</i>-alkyl amino acids, and to achieve the mild, efficient, and site-selective modification of peptides