Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where protection of amine functional groups is required. Its structure allows it to act as a protecting group reagent in multi-step organic syntheses, especially in the production of drugs involving nitrogen-containing compounds. The tert-butyloxycarbonyl (Boc) type moiety provides stability under various reaction conditions and can be selectively removed under mild acidic conditions, making it valuable in peptide and heterocycle chemistry. Also utilized in the preparation of specialty polymers and functionalized materials where controlled reactivity is essential.