Used as a versatile reagent in organic synthesis, particularly in the preparation of nitrogen-containing heterocycles. It serves as a protecting group for amines and other nucleophiles due to its stability under various reaction conditions and ease of removal when needed. Commonly employed in the synthesis of pharmaceuticals and agrochemicals where selective functional group manipulation is required. Its tosyl group enhances solubility in organic solvents and facilitates crystallization of intermediates. Also utilized in the formation of pyrazole derivatives, which are important scaffolds in medicinal chemistry due to their biological activity.