Used as a key chiral intermediate in the synthesis of pharmaceuticals, particularly in the development of biologically active compounds requiring high enantiomeric purity. Its rigid, fused heterocyclic structure makes it valuable in medicinal chemistry for constructing complex molecules, especially in the design of protease inhibitors and central nervous system agents. The compound’s functional groups allow for selective modifications, enabling efficient coupling in multi-step syntheses of active pharmaceutical ingredients (APIs). It is also employed in research settings to explore new routes in asymmetric synthesis and to build libraries of structurally diverse compounds for drug discovery.