Used in peptide synthesis as a building block, particularly for introducing proline derivatives into peptide chains. It serves as a protected intermediate, allowing selective reactions in complex organic syntheses. Commonly applied in pharmaceutical research for developing peptide-based drugs and bioactive compounds. Its Boc-protected amine group ensures stability during reactions, enabling precise control in multi-step synthetic processes. Also utilized in the study of peptide conformations and secondary structures due to proline's unique ring structure.