Boc-2,6-Dichloro-L-Phenylalanine is a Boc-protected L-phenylalanine derivative bearing two chlorine substituents at the 2- and 6-positions of the aromatic ring, classifying it as a halogenated, non-natural amino acid building block for peptide chemistry. The molecule contains an N-terminal tert-butoxycarbonyl (Boc) protecting group and a free carboxylic acid, with the α-amino functionality protected to control chemoselectivity during stepwise coupling while the dichloro-substituted phenyl side chain provides increased hydrophobicity and altered electronic character relative to unsubstituted phenylalanine. It is used as a protected amino acid precursor in solid-phase or solution-phase peptide synthesis and in structure-activity or structure-property studies where aryl halogenation is used to tune binding interactions, conformational preferences, or analytical behavior.
CAT No: CP12304
Boc-2,6-Dichloro-L-Phenylalanine is a Boc-protected amino acid building block bearing a 2,6-dichloro-substituted phenyl side chain, providing increased steric bulk and halogen electronic effects relative to unsubstituted phenylalanine. The N-terminal Boc group makes it a common choice for protected-amino-acid handling and peptide assembly workflows, while the dichloro aromatic ring offers a chemically robust handle for downstream medicinal chemistry and structure-property studies. This reagent is typically selected when a peptide or peptidomimetic scaffold requires a more hydrophobic, conformationally influential aromatic residue.
1. Peptide Synthesis Building Block
Boc-2,6-Dichloro-L-Phenylalanine is used by peptide chemists to incorporate a sterically demanding, halogenated aromatic residue into short peptides, peptide fragments, and larger peptide constructs. The Boc protection supports routine protected-amino-acid coupling strategies used in custom peptide synthesis, enabling consistent handling during stepwise assembly. Researchers commonly choose the 2,6-dichloro phenyl side chain to modulate local hydrophobicity and steric environment, which can be important for controlling folding propensity, receptor/target interface shape in binding studies, or protease susceptibility trends observed across analog series.
2. Medicinal Chemistry Analog Development
Boc-2,6-Dichloro-L-Phenylalanine is frequently employed in medicinal chemistry programs that generate peptidomimetics and peptide-like analogs for structure-activity relationship (SAR) exploration. The dichloro substitution pattern is valued as a practical way to tune aromatic electronics and lipophilicity while maintaining a phenylalanine-derived backbone geometry. Medicinal chemists and CRO teams use this building block to prepare analog libraries where the halogenated aromatic residue is varied or held constant, supporting systematic evaluation of how steric and electronic changes propagate through a peptide or constrained peptidomimetic scaffold.
3. Pharmaceutical Intermediate Synthesis
Boc-2,6-Dichloro-L-Phenylalanine serves as a protected amino acid intermediate for downstream synthesis of halogenated aromatic amino acid derivatives used in pharmaceutical intermediate development. The Boc group provides a stable, isolable functional handle for further derivatization steps that convert the amino acid into activated derivatives, coupling-ready forms, or specialized intermediates required for scale-up chemistry. Process and development chemists often select this specific dichloro substitution pattern when the target intermediate must retain the 2,6-dichloro aromatic motif to meet defined physicochemical properties in later-stage synthesis.
4. Structure-Property Studies
Boc-2,6-Dichloro-L-Phenylalanine is also used in research settings focused on structure-property relationships for halogenated amino acid residues within peptide-like materials and bioactive analogs. The 2,6-dichloro phenyl side chain provides a controlled way to introduce steric shielding around the aromatic ring, which can influence aggregation behavior, intermolecular packing, and overall scaffold hydrophobic character in assembled systems. Materials and chemical biology teams incorporate this residue into defined sequences or fragments to compare against non-halogenated counterparts, supporting interpretation of how aromatic substitution patterns affect the performance characteristics of the resulting constructs.
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