Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its trifluoromethyl group enhances metabolic stability and membrane permeability, making it valuable in drug design. The Boc-protected amine allows for selective deprotection and coupling in peptide-like structures, enabling controlled assembly of complex molecules. Commonly employed in medicinal chemistry for structure-activity relationship studies due to its steric and electronic properties.