(S)-Boc-3-methyl-β-Phe-OH is widely used in peptide synthesis as a building block for creating complex peptide structures. Its Boc (tert-butoxycarbonyl) protecting group ensures selective deprotection during peptide chain assembly, making it valuable in solid-phase peptide synthesis (SPPS). The compound is particularly useful in the development of peptide-based pharmaceuticals, where its chiral center and methyl group contribute to the stability and bioactivity of the final peptide. Additionally, it finds applications in research focused on designing peptide mimics and inhibitors for therapeutic targets, such as enzymes or receptors. Its structural features also make it suitable for studying conformational properties of peptides in drug discovery.