Used in peptide synthesis and pharmaceutical research as a protected intermediate, particularly in the development of collagen-like peptides and drugs targeting connective tissue disorders. The BOC (tert-butoxycarbonyl) group stabilizes the amine during synthesis, while the cis-4-hydroxyproline moiety contributes to structural rigidity and biological activity in peptide chains. Commonly employed in the preparation of protease inhibitors, wound healing agents, and treatments for fibrotic diseases due to its role in modulating protein-protein interactions and enhancing metabolic stability. Also utilized in the synthesis of small molecule drugs where stereochemical control and hydroxyl group functionality are critical.