Used primarily as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. Its activated ester structure makes it suitable for peptide coupling and acylation reactions, where it facilitates the formation of amide bonds under mild conditions. Commonly employed in the preparation of beta-keto acid derivatives and heterocyclic compounds. Also finds use in the synthesis of biologically active molecules, including enzyme inhibitors and prodrugs, due to its ability to release butyric acid derivatives upon hydrolysis. Stable and efficient in solid-phase synthesis, it is valued in medicinal chemistry for constructing complex molecular architectures.