Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the preparation of β-hydroxy-α-amino acid derivatives which are key structural motifs in various bioactive molecules. This serine derivative features a protected amine (Cbz) and carboxylic acid (tert-butyl ester), with a free hydroxyl group on the β-position, enabling selective reactions in peptide chemistry and asymmetric synthesis. Frequently utilized in the development of protease inhibitors and other enzyme-targeted drugs. Its (S) stereochemistry enables control over the configuration of final products, making it valuable in medicinal chemistry for creating enantiomerically pure compounds.