Used as a peptide coupling reagent in organic synthesis, particularly in the preparation of complex peptides and proteins. Its diazomethane-derived structure allows for efficient esterification and amidation reactions under mild conditions. Commonly employed in solid-phase peptide synthesis to introduce the Boc-protected leucine residue with high stereochemical integrity. The compound is also utilized in the synthesis of enzyme inhibitors and bioactive peptides due to its stability and selective reactivity. Handle with care due to potential diazo compound hazards.