Used primarily as an intermediate in peptide synthesis, especially in the preparation of fluorinated peptides for pharmaceutical and biochemical research. Its trifluoroacetyl group enhances stability and influences conformational behavior of the resulting peptides, making it valuable in studies of peptide structure and activity. The chloride functionality allows for efficient coupling with amino groups under mild conditions, facilitating the construction of complex peptide sequences. It is also employed in the development of bioactive molecules where fluorine substitution is used to modulate metabolic stability, lipophilicity, and binding affinity.