Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical development. It serves as a sulfinate donor in radical reactions, enabling the formation of carbon-sulfur and carbon-carbon bonds under mild conditions. Its protected azetidine ring makes it valuable for constructing strained heterocyclic systems found in drug candidates. Commonly applied in medicinal chemistry for the preparation of protease inhibitors and kinase modulators. Also utilized in late-stage functionalization due to its stability and selective reactivity in multistep syntheses.