Used as a chiral building block in organic synthesis, particularly in the preparation of pharmaceuticals and biologically active compounds. Its ester functionality enhances solubility and reactivity in peptide coupling reactions, making it valuable in the development of peptidomimetics and drug intermediates. Commonly employed in asymmetric synthesis due to the stability of the proline ring and its ability to induce stereoselectivity. Also utilized in the synthesis of catalysts for organocatalytic reactions, such as aldol or Mannich reactions, where stereocontrol is critical.