Boc-Phg-OH is widely used in peptide synthesis as a protecting group for amino acids. It helps in preventing unwanted side reactions during the formation of peptide bonds. This compound is particularly useful in solid-phase peptide synthesis, where it ensures the selective deprotection and coupling of amino acids, leading to the efficient production of complex peptides. Additionally, Boc-Phg-OH is employed in the preparation of peptidomimetics and other bioactive molecules, where precise control over the chemical structure is crucial. Its stability under various reaction conditions makes it a valuable tool in organic and medicinal chemistry research.