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 chloro functional groups allow for selective reactions, making it valuable in multi-step organic synthesis. Commonly employed in the preparation of protease inhibitors, central nervous system agents, and other bioactive molecules where the (R)-enantiomer is essential for desired biological activity. The Boc group ensures stability during reactions and can be easily removed under mild acidic conditions, enabling further functionalization.