Used as a key chiral intermediate in the synthesis of pharmaceutical agents, particularly in the development of protease inhibitors and antiviral drugs. Its rigid thiochroman dioxide scaffold with a defined stereochemistry enhances binding selectivity in drug-receptor interactions. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to mimic peptide motifs while offering improved metabolic stability. Also utilized in asymmetric synthesis to introduce chirality in complex molecules.