Used as an intermediate in organic synthesis, particularly in pharmaceutical development. It serves as a protected amine building block for constructing complex molecules, especially in the preparation of bioactive compounds and drug candidates. The tert-butyl carbamate (Boc) group provides stability during reactions and can be selectively removed under mild acidic conditions, allowing for controlled amine deprotection in multi-step syntheses. Its cyclopropyl and aryl substituents make it valuable for modifying molecular rigidity and lipophilicity, which are important in optimizing drug potency and metabolic stability.