Used primarily as a protecting agent for primary and secondary amines in organic synthesis. It selectively blocks amine functionality, allowing reactions to proceed at other reactive sites without interference. The tert-butyl carbamate (Boc) group it introduces is stable under a variety of reaction conditions and can be removed later under mild acidic conditions, making it ideal for multi-step synthesis, especially in pharmaceutical and peptide chemistry. Its high reactivity toward amines enables efficient protection even at low temperatures, minimizing side reactions. Commonly employed in the preparation of amino acids, heterocycles, and complex drug intermediates.