BOC-PYR-OET is widely used in peptide synthesis as a protecting group for amino acids. It helps to prevent unwanted reactions during the formation of peptide bonds, ensuring the desired sequence is achieved. The compound is particularly valuable in solid-phase peptide synthesis, where it offers stability under reaction conditions and can be selectively removed when needed. Additionally, it is utilized in the development of pharmaceuticals and bioactive peptides, contributing to the creation of complex molecules with high precision. Its application extends to research in biochemistry and medicinal chemistry, where it aids in the study of peptide structures and functions.