Used as a key intermediate in organic synthesis, particularly in the preparation of biologically active compounds and pharmaceuticals. Its structure allows for selective functionalization, making it valuable in constructing complex molecules such as natural products and drug candidates. Commonly employed in ring-opening and cycloaddition reactions to build lactone or cyclic carbonate frameworks found in various therapeutic agents. Also utilized in the development of prodrugs and biodegradable polymers due to its hydrolytically labile nature.