Used in peptide synthesis as a protected amino acid derivative, enabling selective incorporation of a pyrazole-functionalized alanine residue into peptide chains. The Boc group provides temporary N-terminal protection, allowing stepwise assembly under mild conditions. The pyrazolyl side chain can act as a coordinating ligand in metalloprotein mimics or serve as a hydrogen-bonding moiety in bioactive peptide design. Commonly applied in medicinal chemistry for developing enzyme inhibitors or receptor ligands where heterocyclic functionality modulates biological activity. Also useful in solid-phase synthesis due to its stability and clean deprotection profile.