(1S,2R)-2-(3,4-difluorophenyl)cyclopropan-1-amine is a chiral cyclopropylamine derivative featuring a 3,4-difluorophenyl substituent. Its structure combines a strained cyclopropane ring with a primary amine and a difluorinated aromatic moiety, offering both conformational rigidity and electronic modulation. This compound is primarily utilized as a key small-molecule fragment and chiral building block in medicinal chemistry, particularly for the synthesis of kinase inhibitors and central nervous system (CNS) active agents. The (1S,2R) stereochemistry is critical for target binding affinity and selectivity in drug discovery programs. It is commonly employed in the development of novel therapeutic candidates targeting oncology and neurological disorders, where the difluorophenyl group enhances metabolic stability and lipophilicity.