Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of protease inhibitors and other biologically active molecules. The Boc-protected azetidine ring provides structural stability and selective reactivity, making it valuable in peptide-like drug design. The carboxymethoxy side chain allows for further functionalization, enabling conjugation to other molecular fragments in medicinal chemistry. Commonly employed in solid-phase and solution-phase synthesis due to its compatibility with various coupling reagents and protecting group strategies.