Boc-2,3-Dichloro-L-Phenylalanine is a protected, halogenated phenylalanine derivative in which the amino group is masked as a Boc carbamate and the side chain is a substituted phenyl ring bearing two chlorine atoms at the 2- and 3-positions. The molecule retains the amino acid backbone with a carboxylic acid functional group and an L-stereochemical configuration as indicated by the name, while the 2,3-dichloro substitution increases halogenated aromatic character and modulates side-chain polarity and steric profile. In synthesis, this protected amino acid is employed as a building block for stepwise peptide assembly and for preparing halogenated peptide analogues used in structure-activity studies and chemical biology workflows that require defined aromatic substitution patterns.
CAT No: CP12004
Boc-2,3-Dichloro-L-Phenylalanine is a Boc-protected amino acid building block bearing a 2,3-dichloro-substituted phenylalanine side chain, providing increased steric and electronic modulation compared with the parent phenylalanine. The Boc group supports its use as a protected amino acid in peptide and peptidomimetic assembly workflows, while the vicinal dichloro substitution offers a chemically distinctive handle for downstream derivatization and SAR-focused medicinal chemistry programs. Researchers select this stereodefined, protected scaffold when they need a halogenated aromatic residue to tune conformational preferences, hydrophobic character, and physicochemical properties in synthetic peptide analogs.
1. Peptidomimetic Building Blocks
Boc-2,3-Dichloro-L-Phenylalanine is used by peptide and peptidomimetic chemists to incorporate a halogenated phenylalanine residue into custom peptide sequences and SAR libraries. The Boc-protected amino functionality makes it compatible with standard protected-amino-acid coupling strategies used in solution-phase peptide synthesis and in assembling modified peptide segments for medicinal chemistry screening. The 2,3-dichloro substitution is particularly valued when developers aim to systematically vary aromatic electronics and steric bulk while maintaining the overall amino acid topology, enabling structure-activity relationship studies around halogenated aromatic motifs.
2. Medicinal Chemistry SAR Intermediates
Boc-2,3-Dichloro-L-Phenylalanine serves as a practical intermediate for constructing drug-discovery scaffolds that rely on halogenated aromatic amino acid elements. Medicinal chemistry groups employ this building block to prepare analog series where the dichloro substitution is used to probe effects of increased lipophilicity, altered hydrogen-bonding patterns at the aromatic ring, and changes in metabolic stability trends associated with halogenated motifs. Because the compound is already protected at the amino terminus, it is commonly handled as a ready-to-couple component for generating defined intermediates toward peptide-like inhibitors, constrained peptidomimetics, and other aromatic residue-containing bioactive candidates.
3. Protected Amino Acid Segment Synthesis
Boc-2,3-Dichloro-L-Phenylalanine is routinely selected for preparing defined protected amino acid segments used in stepwise peptide assembly, including the synthesis of longer, modified sequences where careful control of functional group compatibility is required. Peptide synthesis teams use the Boc-protected format to manage reactivity during coupling steps and to support consistent incorporation of the dichloro aromatic residue at a specific position within a target sequence. The stereodefined L-configuration and the stable, pre-functionalized side chain enable reproducible construction of halogenated peptide analogs for downstream purification, characterization, and comparative biological or physicochemical profiling workflows.
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