Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry. It serves as a protected form of pyrrolidine, allowing selective reactions at other functional sites in complex molecule construction. Commonly employed in the synthesis of bioactive compounds, including drugs and natural products, where controlled amine reactivity is required. Its Cbz-protected amine group is easily removed under mild conditions, making it ideal for multi-step syntheses. Also utilized in the development of protease inhibitors and other therapeutic agents involving nitrogen-containing heterocycles.