Boc-O-tert-butyl-L-serine is widely used in peptide synthesis as a protected form of L-serine. The tert-butyl group protects the hydroxyl side chain, while the Boc (tert-butyloxycarbonyl) group safeguards the amino group, preventing unwanted reactions during peptide assembly. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where selective deprotection allows for the stepwise construction of peptides. It is also employed in the synthesis of complex organic molecules and pharmaceuticals, where precise control over reactivity is essential. Additionally, it serves as a building block for creating serine-containing peptides and proteins, which are crucial in biochemical research and drug development.