Used in the synthesis of pharmaceuticals, particularly as an intermediate in the production of certain chiral drugs. It serves as a building block in asymmetric synthesis due to its functional groups that allow for selective reactions. Commonly applied in the development of alpha-adrenergic blockers and other cardiovascular medications. Also utilized in research for resolving racemic mixtures and studying enzyme-catalyzed reactions. Its chlorinated aromatic structure makes it valuable in modifying drug potency and metabolic stability.