This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected form of lysine, where the Fmoc group protects the amino group and the Teoc group protects the side chain. This dual protection allows for selective deprotection during peptide chain assembly, enabling precise control over the synthesis process. It is especially valuable in constructing complex peptides and proteins, where maintaining the integrity of specific functional groups is critical. Its application is common in pharmaceutical research, biotechnology, and the development of therapeutic peptides.