O-Benzyl-L-serine is widely used in the synthesis of peptides and proteins, serving as a protected form of serine. Its benzyl group acts as a protective moiety, preventing unwanted reactions during peptide bond formation. This compound is particularly valuable in solid-phase peptide synthesis (SPPS), where selective deprotection is required to build complex peptide structures. It is also employed in the development of pharmaceutical compounds, especially in the creation of serine-based drugs or enzyme inhibitors. Additionally, O-Benzyl-L-serine is utilized in biochemical research to study enzyme mechanisms and protein interactions, owing to its ability to mimic natural serine in controlled environments. Its stability and reactivity make it a key intermediate in organic and medicinal chemistry applications.