Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in the preparation of biologically active molecules due to its ability to form stable heterocyclic structures. Its sulfone and carboxylic acid functional groups allow for versatile chemical modifications, making it valuable in medicinal chemistry for optimizing drug potency and selectivity. Also employed in the design of agrochemicals and functional materials where electron-withdrawing groups enhance molecular stability and reactivity.