H-D-Met-OEt Hydrochloride is primarily used in peptide synthesis as a building block for creating specific peptide sequences. Its structure makes it valuable in the development of bioactive peptides, which are essential in pharmaceutical research for drug discovery and development. It is also utilized in the study of enzyme-substrate interactions, helping researchers understand biochemical pathways and mechanisms. Additionally, this compound finds application in the production of modified peptides with enhanced stability or activity, which are critical in therapeutic and diagnostic applications. Its role in organic synthesis extends to the preparation of chiral compounds, contributing to the field of asymmetric synthesis.