Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs). The aldehyde group at the 3-position of the phenyl ring enables further chemical modifications such as reductive amination or condensation reactions, while the nitro group at the 4-position can be reduced to an amine for additional functionalization. Its piperazine core is commonly found in bioactive molecules, making it valuable in medicinal chemistry for constructing drug candidates targeting central nervous system disorders, antimicrobial agents, or kinase inhibitors. The tert-butoxycarbonyl (Boc) protecting group ensures selective reactivity of the piperazine nitrogen during multi-step syntheses, enhancing yield and purity in complex molecule assembly.