Used in peptide synthesis as a protected intermediate, particularly in the preparation of collagen-like peptides and other biologically active molecules containing hydroxyproline. The Boc group provides temporary protection of the amino function, while the ethyl ester masks the carboxylic acid, allowing selective coupling reactions. Its stability under various reaction conditions makes it valuable in multi-step syntheses of complex peptides. Commonly employed in pharmaceutical research for developing protease inhibitors and tissue engineering scaffolds.