Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of biologically active compounds where stereochemistry plays a critical role. Its aryl-substituted ethylamine structure makes it valuable in medicinal chemistry for constructing enzyme inhibitors and receptor modulators. The presence of a difluoromethyl group enhances metabolic stability and lipophilicity, improving drug-like properties in candidate molecules. Commonly employed in asymmetric synthesis and catalysis to introduce chirality into target molecules.