(2S,5S)-5-Hydroxypiperidine-2-carboxylic acid is a chiral, non-proteinogenic amino acid derivative featuring a piperidine ring substituted with a carboxylic acid group and a hydroxyl group. It is a valuable chiral building block and intermediate in organic synthesis, particularly in the pharmaceutical industry. This compound serves as a key intermediate in the synthesis of various biologically active molecules and active pharmaceutical ingredients (APIs). Its structural motif, combining a constrained cyclic amine with functional handles for further derivatization, makes it useful for constructing complex heterocyclic scaffolds found in drug candidates. It is specifically cited as an intermediate in the synthesis of certain pharmaceutical compounds. As a chiral synthon, it is utilized in medicinal chemistry research for the development of new therapeutic agents. Its applications are primarily centered around its role as a specialized intermediate rather than as a bulk commodity or a widely used generic reagent.