(S)-2-(Boc-amino)-4-methyl-4-pentenoic acid is primarily used in the synthesis of peptides and small molecules in pharmaceutical research. It serves as a key intermediate in the preparation of compounds with potential therapeutic applications. The Boc (tert-butoxycarbonyl) protecting group ensures selective reactions during synthesis, particularly in the formation of peptide bonds. Its structure, featuring a pentenoic acid moiety, allows for further functionalization, making it valuable in the development of drugs targeting specific biological pathways. Additionally, it is utilized in organic chemistry for constructing complex molecules in asymmetric synthesis, contributing to the production of enantiomerically pure substances.