Boc-2,3-Dimethy-L-Phenylalanine is a Boc-protected, L-phenylalanine-derived amino acid derivative featuring a phenyl side chain substituted at the 2- and 3-positions with methyl groups. The molecule contains a carbamate-protected amino group (Boc) and a free carboxylic acid, and the α-amino stereochemistry is specified as L while the additional stereocenters created by the 2,3-dimethyl substitution are not further defined in the name. As a protected amino acid building block, it is used in peptide synthesis to introduce a sterically modified, hydrophobic phenylalanine analogue for structure-activity studies and for the preparation of more complex amino acid and peptide derivatives under chemoselective coupling conditions.
CAT No: CP13804
Boc-2,3-Dimethy-L-Phenylalanine is a Boc-protected, sterically substituted phenylalanine derivative featuring two methyl substituents at the 2,3-positions of the amino acid backbone. This non-proteinogenic amino acid building block is used primarily to introduce conformational and steric effects into peptide frameworks while maintaining a protected amine for controlled coupling. Its Boc group supports routine peptide synthesis workflows, making it a practical intermediate for preparing modified peptide segments and structure-property studies.
1. Sterically Tuned Peptide Synthesis
Boc-2,3-Dimethy-L-Phenylalanine is used by peptide chemistry groups to incorporate a highly substituted phenylalanine motif into custom peptides, where backbone methylation is leveraged to modulate local conformation and steric presentation around the side chain. The Boc-protected amine enables straightforward integration into peptide assembly strategies used in research-grade peptide synthesis, allowing chemists to prepare analog series for structure-activity relationship work, protease/peptidase substrate paneling, and conformational control studies. Because the 2,3-dimethyl substitution pattern is directly embedded in the amino acid backbone, it is particularly valued when researchers want effects beyond simple side-chain variation, such as altered turn propensity, restricted backbone flexibility, or modified presentation of the aromatic group.
2. Peptide Library Building Blocks
Boc-2,3-Dimethy-L-Phenylalanine supports medicinal chemistry and chemical biology teams building focused peptide libraries that probe how backbone substitution impacts binding-site recognition, aggregation propensity, and overall peptide behavior. In library workflows, the protected amino acid is selected as a defined, reproducible building block to keep sequence and stereochemical identity consistent across many analogs, which is essential for downstream comparative studies by LC-MS, HPLC purification, and bioassay-compatible characterization. The sterically demanding 2,3-dimethyl backbone also makes this reagent useful for generating "backbone-modified" peptide variants that help distinguish steric versus electronic contributions in SAR campaigns.
3. Pharmaceutical Intermediate Development
Boc-2,3-Dimethy-L-Phenylalanine is frequently handled as a specialized amino acid intermediate for the preparation of advanced peptidomimetic fragments used in drug discovery chemistry. Development teams use this type of Boc-protected, backbone-substituted amino acid to access defined peptide-like scaffolds that can be further elaborated into larger intermediates for final candidate synthesis, including segment coupling to generate longer sequences or incorporation into constrained motifs. The protected amine and the stable, isolable building-block format are practical advantages for managing multistep synthesis planning and ensuring that the substituted phenylalanine unit is introduced with high structural fidelity.
4. Structure-Property Analog Studies
Boc-2,3-Dimethy-L-Phenylalanine is applied in academic and industrial research programs that investigate how backbone methyl substitution influences peptide physicochemical properties and conformational preferences. Researchers employ this building block to generate analogs that differ specifically at the backbone substitution level while keeping other structural elements constant, enabling clearer interpretation of trends in purification behavior, chromatographic retention, and spectroscopic or computational conformational analyses. This targeted use is especially relevant when the goal is to map how steric bulk near the alpha carbon affects peptide folding tendencies and the local environment around the phenyl side chain.
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