Used primarily in peptide synthesis, it serves as a building block for creating peptides with specific structural and functional properties. The Fmoc group provides protection for the amino group during synthesis, ensuring controlled and precise peptide chain elongation. Its application is crucial in the development of peptide-based drugs, where the introduction of modified tyrosine residues can enhance stability, bioavailability, or receptor binding affinity. Additionally, it is utilized in research to study peptide interactions and modifications, contributing to advancements in biochemistry and pharmaceutical sciences.