Used primarily as an intermediate in organic synthesis, especially in the development of pharmaceutical compounds. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide or sulfonate ester linkages. Commonly employed in the preparation of kinase inhibitors and other biologically active molecules. The pyridine moiety enhances binding affinity in drug candidates, particularly in medicinal chemistry targeting inflammatory and oncological pathways. Stable enough for use in solid-phase synthesis and compatible with various protection strategies in multi-step reactions.