Boc-4-Amino-D-phenylalanine is widely used in peptide synthesis as a protected amino acid derivative. Its Boc (tert-butyloxycarbonyl) group serves as a protective shield for the amino group during the synthesis process, preventing unwanted side reactions. This compound is particularly valuable in the production of complex peptides and proteins, where precise control over the sequence and structure is essential. Additionally, it is employed in the development of pharmaceuticals, especially in the creation of peptide-based drugs, where its chiral nature ensures the correct stereochemistry of the final product. Researchers also utilize it in biochemical studies to investigate peptide interactions and functions.