Used as a key intermediate in the synthesis of amino acids and peptides, particularly in the preparation of protected amino acid derivatives. Its Boc-protected amine group allows for controlled stepwise peptide chain elongation, making it valuable in solid-phase peptide synthesis. The ester groups can be selectively hydrolyzed or reduced, enabling further functionalization. Commonly employed in medicinal chemistry for building complex nitrogen-containing molecules, including drug candidates and bioactive compounds. Also utilized in the preparation of unnatural amino acids and peptidomimetics due to its versatile reactivity.