Boc-3,5-Dichloro-L-Phenylalanine is a protected, naturally occurring amino acid derivative in which the phenylalanine scaffold bears two chlorine substituents at the 3- and 5-positions of the aromatic ring. The molecule contains an N-terminal Boc protecting group, a free carboxyl functional group, and an L-phenylalanine stereochemical configuration, while the dichloro-substituted benzyl side chain provides a more electron-withdrawing aromatic environment for controlled chemical behavior during peptide assembly. As an amino acid building block, it is used in peptide synthesis workflows to introduce sterically and electronically modified phenylalanine residues, supporting stepwise coupling strategies that rely on temporary N-protection to manage chemoselectivity and minimize side reactions.
CAT No: CP12504
Boc-3,5-Dichloro-L-Phenylalanine is a Boc-protected L-phenylalanine derivative bearing two chlorine atoms on the aromatic ring (3,5-dichloro substitution), providing a sterically and electronically modified side chain while retaining the protected amino functionality for stepwise peptide assembly. This halogenated, protected amino acid building block is commonly used in research and development settings where aromatic substitution patterns are used to tune peptide properties and downstream synthetic outcomes. Its Boc protection supports standard protected-amino-acid handling for peptide intermediate preparation and controlled coupling workflows.
1. Peptide Synthesis Building Block
Boc-3,5-Dichloro-L-Phenylalanine is used as a protected amino acid building block for custom peptide synthesis, particularly when a halogenated phenylalanine residue is required to introduce a defined aromatic substitution pattern into a peptide sequence. Peptide chemists and custom peptide manufacturing teams rely on Boc-protected amino acids to enable consistent segment coupling and to keep the amino group protected during intermediate handling. The 3,5-dichloro substitution can be leveraged to modulate steric environment and aromatic electronics around the residue, which is often relevant when designing peptides for structure-activity relationship studies, conformational effects, or improved robustness in synthetic series where aromatic identity must be tightly controlled.
2. Medicinal Chemistry Peptidomimetic Intermediates
Boc-3,5-Dichloro-L-Phenylalanine serves as a practical intermediate for medicinal chemistry programs that generate peptidomimetic scaffolds and aromatic amino acid-containing analogs. Medicinal chemistry groups use halogenated amino acid derivatives to systematically vary aromatic substitution while maintaining the stereochemical integrity of the L-phenylalanine backbone, supporting SAR workflows that compare closely related structures. The Boc-protected amine form is particularly convenient for downstream derivatization into amide-linked fragments and peptide-like structures, where the dichloro aromatic ring can provide a distinct physicochemical profile for fragment libraries and lead optimization chemistry.
3. Pharmaceutical Intermediate Development
Boc-3,5-Dichloro-L-Phenylalanine is also used in the preparation of pharmaceutical chemistry intermediates where a protected, halogenated amino acid motif must be introduced as a defined building block. Process and development chemists often choose Boc-protected amino acid derivatives to manage functional group compatibility across multi-step syntheses and to ensure the amino functionality is appropriately masked until it is needed for coupling or further transformation. The presence of the 3,5-dichloro aromatic ring makes this intermediate valuable when a specific substituted phenylalanine unit is required to construct final intermediates for active-ingredient research and specialty chemical manufacturing workflows.
4. Structure-Activity Relationship Studies
Boc-3,5-Dichloro-L-Phenylalanine is frequently selected for SAR and analog generation studies that require precise incorporation of a 3,5-dichloro-substituted aromatic residue. Research groups building peptide libraries or small sets of closely related analogs use this reagent to keep the backbone stereochemistry constant while varying side-chain substitution, enabling clearer interpretation of how aromatic substitution influences measured properties in downstream assays. Because the compound is already protected for peptide-style assembly, it fits smoothly into iterative synthesis cycles used by academic and industrial chemistry teams to generate matched series for comparative characterization.
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