Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective functionalization, making it valuable in constructing complex drug molecules. Commonly employed in cross-coupling reactions to introduce aromatic rings bearing sulfone and carboxylic acid functionalities, which are important for enhancing binding affinity and solubility in bioactive molecules. Also utilized in the preparation of protease inhibitors and anti-inflammatory agents due to its ability to modulate molecular interactions in biological systems.