Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring high enantiomeric purity. Its vinyl group allows for further functionalization through reactions like hydroboration or epoxidation, enabling the introduction of diverse substituents. The tert-butyl carbamate (Boc) protecting group stabilizes the nitrogen during multi-step syntheses and can be easily removed under mild acidic conditions. Commonly employed in the preparation of bioactive molecules, including neurologically active compounds and protease inhibitors.