N-Benzyloxycarbonyl-D-norleucine is primarily used in peptide synthesis as a protected amino acid derivative. Its role is to safeguard the amino group during the formation of peptide bonds, ensuring selective reactions and preventing unwanted side reactions. This compound is particularly valuable in the synthesis of complex peptides and proteins, where precise control over the sequence and structure is essential. Additionally, it finds applications in biochemical research for studying enzyme mechanisms and protein interactions, as well as in the development of pharmaceuticals, where it aids in the creation of peptide-based drugs. Its stability and compatibility with various synthetic methods make it a versatile tool in organic and medicinal chemistry.