Used primarily as a key intermediate in the synthesis of pharmaceuticals, especially in the production of β-lactam antibiotics. Its rigid tricyclic structure and functional groups make it valuable for constructing complex molecular frameworks in medicinal chemistry. It is also employed in the development of enzyme inhibitors and bioactive compounds due to its ability to mimic peptide bonds and interact with biological targets. Additionally, it serves as a building block in asymmetric synthesis, enabling the creation of chiral molecules with high stereoselectivity.