Used in the synthesis of peptide-based pharmaceuticals, particularly as an intermediate in the development of protease inhibitors. Its chiral centers and protected functional groups make it valuable in asymmetric synthesis for creating biologically active molecules. Commonly employed in solid-phase peptide synthesis where selective deprotection and coupling are required. The trifluoroacetate salt form enhances solubility and stability during purification and storage. Also utilized in research settings for designing enzyme inhibitors targeting diseases such as hypertension and viral infections like HIV.