Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of biologically active compounds where stereochemistry plays a critical role. Its sulfone functionality and amine group allow for diverse chemical transformations, making it valuable in medicinal chemistry for constructing heterocyclic systems. Commonly employed in the preparation of enzyme inhibitors and receptor modulators due to its structural similarity to natural amino acids and its ability to enhance metabolic stability. Also utilized in asymmetric synthesis to introduce chirality in drug candidates.