Used in peptide synthesis as a protected amino acid derivative, facilitating the incorporation of phenylalanine with a methyl group at the para position into peptide chains. The Boc (tert-butoxycarbonyl) group serves as a temporary protecting group for the amine functionality, ensuring selective reactions during peptide assembly. It is particularly valuable in solid-phase peptide synthesis (SPPS) and in the preparation of complex peptides for pharmaceutical research, enabling precise control over peptide structure and function. Its application extends to the development of bioactive peptides, enzyme inhibitors, and drug candidates.