1-[(tert-Butyloxycarbonyl)amino]propane-2,3-diol is a reagent used in the synthesis of analogs of Vestipitant, potent and orally NK1 antagonists. Also, it is the used in the synthesis of N-Boc-2-aminoacetaldehyde (B600600), which is used in the synthesis of carbohydrates as well as studies relating to inhibitors of cathepsin K.