Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of bioactive molecules and natural products. Its rigid pyrrolidine backbone with defined stereochemistry makes it valuable for asymmetric synthesis and medicinal chemistry research. Commonly employed to introduce structural complexity and enhance selectivity in drug candidates targeting central nervous system disorders and enzyme inhibitors. Also utilized in the preparation of peptidomimetics due to its ability to mimic proline residues in peptide chains.