Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS), to introduce N-alpha-methyl-4-chloro-D-phenylalanine residues into peptide chains. The Fmoc (fluorenylmethyloxycarbonyl) group serves as a protecting group for the amino group, ensuring selective deprotection during synthesis. This compound is valuable in creating modified peptides with enhanced stability, altered biological activity, or specific binding properties. It is commonly employed in research to study peptide structure-function relationships, develop peptide-based drugs, or engineer peptides with tailored properties for therapeutic or diagnostic applications. Its chloro and methyl modifications can influence peptide conformation and interactions with biological targets.