Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of central nervous system agents. Its reactivity allows for efficient acylation of amines and alcohols, making it valuable in constructing complex heterocyclic structures. Commonly employed in medicinal chemistry for modifying bioactive molecules to enhance potency or alter pharmacokinetic properties. Also utilized in the preparation of enzyme inhibitors and receptor ligands due to its ability to form stable amide bonds under mild conditions.