Used as a protected intermediate in peptide synthesis, particularly in the preparation of complex bioactive molecules. The t-butyl and benzyloxycarbonyl (Cbz) protecting groups shield the amino and carboxylic acid functionalities, allowing selective reactions at the free hydroxyl site and other positions. Commonly employed in the synthesis of antibiotics, protease inhibitors, and other pharmaceuticals where stereochemical purity is critical. The hydroxyl group can be further modified, enabling chain elongation or cyclization strategies in medicinal chemistry. Stable under a variety of reaction conditions, it facilitates multi-step synthetic routes in both research and industrial settings.