Used as a key intermediate in the synthesis of sitagliptin, a pharmaceutical agent for the treatment of type 2 diabetes. It plays a critical role in forming the core structure of the drug, enabling efficient inhibition of the DPP-4 enzyme, which helps regulate blood glucose levels. Its structure supports high selectivity and potency in the final active pharmaceutical ingredient. Commonly employed in late-stage coupling reactions during manufacturing due to its stability and reactivity profile.