Fmoc-D-allo-Thr-OH is primarily used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amino group during the synthesis process. This allows for the sequential addition of amino acids to build peptides with high precision. The D-allo-Thr configuration provides specific stereochemical properties, making it valuable in the synthesis of peptides with unique structural or functional characteristics. It is often employed in research and development of therapeutic peptides, where precise control over peptide sequence and conformation is critical. Additionally, it finds use in the study of peptide folding, interactions, and bioactivity, contributing to advancements in drug discovery and biochemistry.