(S)-2-Amino-2-cyclobutylethanol is a chiral amino alcohol building block featuring a cyclobutyl ring. It is a white to off-white solid with a molecular formula of C6H13NO. This compound is characterized by its primary amino group and a secondary hydroxyl group, both attached to the same chiral carbon center, making it a valuable scaffold for asymmetric synthesis. The primary application of (S)-2-amino-2-cyclobutylethanol is as a key chiral intermediate in pharmaceutical research and development. It serves as a crucial precursor in the synthesis of various active pharmaceutical ingredients (APIs). Notably, it is a core structural component used in the synthesis of novel antiviral agents, including investigational drugs targeting hepatitis C virus (HCV) and other viral infections. Its chiral nature is essential for imparting the desired biological activity and selectivity in the final drug molecule. Beyond its specific pharmaceutical applications, this compound is also utilized as a versatile chiral synthon in organic chemistry. Its structure allows for further functionalization and incorporation into more complex molecular architectures, making it a useful reagent for medicinal chemists exploring new chemical entities.