Boc-3,5-Dimethy-D-Phenylalanine is a Boc-protected, non-natural amino acid derivative belonging to the phenylalanine family, bearing a benzyl side chain substituted at the 3- and 5-positions with methyl groups. The molecule contains an N-Boc carbamate that masks the amino functionality and a free carboxylic acid, and the "D" designation indicates the D-stereochemical configuration at the alpha carbon. As a protected amino acid building block, it is used in peptide synthesis workflows to introduce the sterically modified, hydrophobic dimethylphenylalanine residue while maintaining chemoselectivity through temporary amino protection.
CAT No: CP14305
Boc-3,5-Dimethy-D-Phenylalanine is a Boc-protected, D-configured phenylalanine analog bearing a sterically demanding 3,5-dimethyl substitution on the aromatic ring. This non-proteinogenic amino acid building block is commonly selected for peptide and peptidomimetic synthesis where conformational and steric effects from the substituted phenyl side chain are used to tune structure, stability, and sequence-dependent properties. The Boc group provides an N-protected handle for controlled coupling in synthetic workflows, while the D stereochemistry supports the preparation of stereochemically defined peptide segments and analogs.
1. Peptide Building Block Use
Boc-3,5-Dimethy-D-Phenylalanine is used by peptide chemistry groups to assemble stereodefined peptide segments and peptidomimetics that incorporate a D-amino acid residue with a bulky, hydrophobic aromatic side chain. In custom peptide synthesis and medicinal chemistry programs, the 3,5-dimethyl substitution is leveraged to influence local sterics around the residue, helping researchers probe structure-property relationships across analog series. The Boc-protected amine format supports routine fragment coupling strategies used to generate defined sequences for downstream purification and characterization.
2. Peptidomimetic Structure Tuning
Boc-3,5-Dimethy-D-Phenylalanine supports peptidomimetic development where aromatic substitution and D-configuration are used as design elements to modulate backbone and side-chain presentation. Medicinal chemistry teams frequently incorporate such non-natural residues to create analogs for SAR studies, enabling systematic evaluation of how steric bulk and stereochemistry affect overall conformation and chemical behavior in a series of related compounds. As an amino acid derivative designed for controlled incorporation, it is typically used to prepare intermediate peptide-like scaffolds that can be further functionalized or converted into final lead candidates.
3. Pharmaceutical Intermediate Development
Boc-3,5-Dimethy-D-Phenylalanine is also used in pharmaceutical intermediate development to provide a well-defined chiral building block for constructing advanced synthetic intermediates containing a D-phenylalanine motif. Process development and specialty chemical manufacturing teams value the protected amine functionality for downstream transformations that require a stable, isolable intermediate with a predictable stereochemical identity. This makes the material a practical choice when producing non-natural amino acid-containing fragments used in larger synthesis campaigns, including the preparation of protected peptide segments and stereochemically defined coupling partners for subsequent assembly steps.
4. Stereochemical SAR Libraries
Boc-3,5-Dimethy-D-Phenylalanine is frequently employed in the generation of stereochemically controlled SAR libraries where D-amino acid incorporation is used to diversify peptide analogs. Research groups building libraries for screening and characterization rely on Boc-protected amino acid building blocks to maintain consistent coupling performance across analogs while varying side-chain substitution patterns. The 3,5-dimethyl aromatic ring provides a distinct steric signature that can be systematically compared against less substituted phenylalanine analogs, supporting efficient library design for structure-activity and structure-property investigations.
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