Used in peptide synthesis as a building block, particularly for introducing modified phenylalanine residues into peptide chains. It is valuable in medicinal chemistry for designing and synthesizing peptides with enhanced biological activity or stability. The fluorine substitution can influence the peptide's interaction with biological targets, making it useful in drug discovery and development. Additionally, it is employed in research to study enzyme-substrate interactions and receptor binding due to its unique structural properties. Its protective Boc group allows for selective deprotection during multi-step synthetic processes.