(S)-3-Hydroxypyrrolidin-2-one is a chiral heterocyclic compound featuring a pyrrolidinone core with a hydroxyl group at the 3-position. It is a versatile building block in organic synthesis, particularly valued for its stereochemistry and functional groups. This compound serves as a crucial intermediate in the pharmaceutical industry. It is notably used in the synthesis of various active pharmaceutical ingredients (APIs), including antiviral drugs and other therapeutics that require a chiral pyrrolidine scaffold. Its structure makes it a valuable precursor for constructing complex molecules with biological activity. Beyond its primary use as a pharmaceutical intermediate, (S)-3-Hydroxypyrrolidin-2-one is also employed as a chiral synthon in asymmetric synthesis and medicinal chemistry research. It is commercially available from chemical suppliers specializing in fine chemicals and chiral building blocks.