Used in organic synthesis, particularly in the preparation of peptidomimetics and pharmaceutical intermediates. Its main application lies in protecting the amine group during peptide coupling reactions, allowing selective functionalization at other reactive sites. Commonly employed in the synthesis of protease inhibitors and other bioactive molecules where stereochemical control is important. Also utilized in asymmetric synthesis and chiral pool strategies due to the inherent chirality of the proline backbone. Suitable as a building block in combinatorial chemistry and drug discovery research.