Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. The tert-butoxycarbonyl (Boc)-protected hydrazine and carboxylic acid functional groups allow for versatile coupling reactions after selective deprotection under mild acidic conditions, making it valuable in medicinal chemistry for constructing heterocyclic systems. Commonly employed in solid-phase peptide synthesis and as a building block in the preparation of nicotinoyl-based derivatives with potential antiviral or anticancer activity.