Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring stereochemical control. Its protected amine and piperazine scaffold make it valuable in constructing complex molecules, especially in the production of central nervous system agents, antiviral drugs, and kinase inhibitors. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to modulate solubility, bioavailability, and target binding.