(2S,4R)-4-amino-1-[(tert-butoxy)carbonyl]pyrrolidine-2-carboxylic acid, commonly known as Boc-D-proline, is a vital compound in organic synthesis and peptide chemistry. Its structure features a pyrrolidine ring with a tert-butoxycarbonyl (Boc) protected amino acid moiety, offering versatile reactivity for peptide bond formation and stereochemical control. This compound plays a crucial role in peptide synthesis strategies, enabling the creation of peptide-based therapeutics, peptidomimetics, and biochemical probes. Its chirality and stability make it a preferred building block in pharmaceutical research and drug development endeavors.