Used as a chiral intermediate in the synthesis of biologically active compounds, particularly in the development of pharmaceuticals. Its piperazine backbone with a nitrile group enables structural diversity for drug design, especially in central nervous system agents and kinase inhibitors. The tert-butoxycarbonyl (Boc) protection allows for selective functionalization, while the (R)-configuration supports stereoselective synthesis, making it valuable in asymmetric synthesis routes for active pharmaceutical ingredients (APIs).