L-Homophenylalanine tert-Butyl Ester is primarily utilized in the synthesis of peptides and pharmaceutical intermediates. Its tert-butyl ester group serves as a protective group for carboxylic acids, enabling selective reactions in complex organic syntheses. This compound is particularly valuable in the production of bioactive peptides and drug candidates, where precise control over molecular structure is crucial. It is also employed in the development of enzyme inhibitors and other therapeutic agents, contributing to advancements in medicinal chemistry and drug discovery.