Used as a protected amine intermediate in the synthesis of pharmaceutical compounds, particularly in the development of bioactive molecules where the cyclobutylamine moiety is required. The tert-butoxycarbonyl (Boc) group provides stability during multi-step reactions and can be easily removed under mild acidic conditions to reveal the primary amine for further derivatization. Commonly employed in medicinal chemistry for constructing peptidomimetics and kinase inhibitors. Its rigid cyclobutane ring contributes to conformational constraint, enhancing selectivity and metabolic stability in drug candidates.