Used primarily as an intermediate in peptide synthesis, particularly in the preparation of complex organic molecules and pharmaceuticals. Its aldehyde functional group allows for selective reactions such as reductive amination or aldol condensation, enabling the stepwise construction of peptide chains. The Boc (tert-butoxycarbonyl) group provides temporary protection of the amine functionality, while the benzyl (Bzl) group protects the phenolic hydroxyl, ensuring side-chain stability during synthesis. This compound is especially valuable in solid-phase peptide synthesis and in the development of enzyme inhibitors or bioactive peptides where precise stereochemical control is required.