This chemical, H-Hyp(tBu)-OH, is primarily used in peptide synthesis as a protected building block for hydroxyproline residues. The tert-butyl group protects the hydroxyl function of hydroxyproline, helping to prevent unwanted side reactions during the synthesis process and ensuring the correct sequence and structure of the peptide. This protection provides stability under various reaction conditions, making it a valuable tool in the production of complex peptides and proteins, particularly those mimicking collagen structures, for research and pharmaceutical applications.