Used as an intermediate in the synthesis of hydrazine-based pharmaceuticals and bioactive molecules. Its tert-butoxycarbonyl (Boc) protected hydrazine group allows for selective reactions in peptide coupling and heterocycle formation. Commonly employed in the development of protease inhibitors and kinase inhibitors due to its ability to stabilize molecular conformation. Also utilized in solid-phase organic synthesis and as a building block in medicinal chemistry for creating libraries of compounds in drug discovery. The carboxylic acid functionality enables conjugation to amines or alcohols, making it valuable in linker design for prodrugs and targeted therapies.