Used as a key intermediate in organic synthesis, particularly in the preparation of nitrogen-containing heterocyclic compounds. Its isocyano group participates in multicomponent reactions, such as Ugi and Passerini reactions, enabling the efficient construction of complex molecules. The tosyl group stabilizes adjacent carbanions, making it useful in alkylation and cyclization reactions. Commonly employed in medicinal chemistry for developing peptidomimetics and bioactive molecule scaffolds.