Primarily used in the pharmaceutical industry as a Boc-protected intermediate (Boc-4-hydroxyphenylglycine) in the synthesis of semi-synthetic cephalosporin antibiotics such as cefadroxil and cefprozil. It serves as a key building block for the D-4-hydroxyphenylglycine side chain in these beta-lactam APIs. Additionally, it is utilized in research settings for peptide synthesis, enzyme inhibition studies, and receptor binding mechanisms, contributing to the advancement of therapeutic agents. Its protected structure enables selective modifications, improving synthetic efficiency, drug efficacy, and bioavailability.