Used as a key reagent in organic synthesis, particularly in the preparation of α,β-unsaturated amino acids through Horner-Wadsworth-Emmons olefination reactions. Its phosphonate group enables selective formation of olefins under mild conditions, making it valuable in peptide mimetic and pharmaceutical synthesis. The N-Boc protecting group ensures compatibility with multi-step synthetic sequences by preventing unwanted side reactions at the amino group. Commonly employed in the construction of complex molecules where stereocontrol and functional group tolerance are critical.