Widely used in organic synthesis, especially in the pharmaceutical industry, for introducing the Boc-protected piperazine moiety into complex molecules. It serves as a key reagent in peptide coupling and heterocycle functionalization due to its reactive carbonyl chloride group. The presence of the Boc (tert-butoxycarbonyl) protecting group allows for selective deprotection under mild acidic conditions, making it ideal for multi-step syntheses where controlled reactivity is required. Commonly employed in the preparation of kinase inhibitors, antiviral agents, and other bioactive compounds that incorporate piperazine scaffolds. Its stability and selectivity enhance efficiency in solid-phase and solution-phase synthesis.