Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of central nervous system agents. Its enantiomeric purity makes it valuable in asymmetric synthesis for creating active pharmaceutical ingredients with high stereoselectivity. Commonly employed in the preparation of antihistamines, antidepressants, and other bioactive molecules where the (S)-enantiomer exhibits desired biological activity. Also utilized in research for developing novel receptor ligands and in the manufacture of fine chemicals requiring chiral amines.