Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs) featuring isoxazole moieties. It serves as a protected amine derivative, enabling selective reactions in multi-step organic syntheses. Commonly employed in medicinal chemistry for constructing kinase inhibitors and other bioactive molecules where the isoxazole ring acts as a heterocyclic scaffold. Its tert-butoxycarbonyl (Boc) group allows for easy deprotection under mild acidic conditions, making it valuable in peptide-like coupling strategies and combinatorial chemistry.