(R)-8-Chlorochroman-4-amine is a chiral amine derivative featuring a chroman (benzodihydropyran) scaffold substituted with a chlorine atom at the 8-position. This compound is a key chiral building block in pharmaceutical research and development. Its primary application is as a crucial intermediate in the synthesis of active pharmaceutical ingredients (APIs). Specifically, it serves as a core chiral synthon for the preparation of potent and selective orexin receptor antagonists. These antagonists are being investigated for the treatment of central nervous system disorders, particularly insomnia. The (R)-enantiomer is essential for conferring the desired biological activity and selectivity in the final drug molecule. As a chiral, functionalized heterocyclic amine, it represents a valuable and specific intermediate rather than a general-purpose synthetic reagent. Its synthesis and availability are of significant interest to medicinal chemists working in CNS drug discovery programs.