Used in peptide synthesis to introduce fluorinated aromatic side chains, enhancing the stability and bioavailability of peptides. Its Boc protecting group allows selective deprotection during solid-phase peptide synthesis, enabling precise control over the sequence. Commonly applied in the development of peptide-based drugs, particularly in targeting specific protein interactions or improving metabolic resistance. The difluorophenyl group can influence the peptide's binding affinity and selectivity, making it valuable in designing therapeutic agents for diseases like cancer or infections. Also utilized in research to study the effects of fluorination on peptide structure and function.