Used as an intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research. It serves as a building block for modifying piperazine derivatives, which are common in drug development due to their favorable pharmacokinetic properties. The chlorosulfonyl group allows for further functionalization, enabling the creation of sulfonamide linkages found in various therapeutic agents. Commonly employed in the preparation of kinase inhibitors and receptor antagonists. Also utilized in agrochemical synthesis for developing novel active ingredients. Its tert-butyl carbamate (Boc) protection makes it suitable for multi-step syntheses where selective deprotection is required.