Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the preparation of enantiomerically pure compounds. The cyano group allows for further functionalization, such as conversion to carboxylic acids or amines, enabling its use in peptide mimetics and active pharmaceutical ingredients (APIs). The tert-butoxycarbonyl (Boc) protecting group stabilizes the amine during reactions and can be easily removed under mild acidic conditions, making it valuable in multi-step organic synthesis. Commonly employed in asymmetric synthesis and medicinal chemistry for developing drugs with high stereoselectivity.