Boc-3,4-Dimethy-D-Phenylalanine is a protected, non-natural amino acid derivative featuring a benzyl side chain substituted with two methyl groups at the 3 and 4 positions and bearing a Boc-protected amino functionality. The molecule contains a free carboxylic acid and a stereochemically defined D-configuration as indicated by the product name, with the Boc group serving as an amino protecting group to control chemoselectivity during stepwise coupling chemistry. It is used as a building block in peptide synthesis and structure-activity studies where incorporation of a sterically modified, methyl-substituted phenylalanine analogue is required for conformational or side-chain property variation.
CAT No: CP14205
Boc-3,4-Dimethy-D-Phenylalanine is a Boc-protected, stereochemically defined phenylalanine derivative bearing 3,4-dimethyl substitution on the aromatic ring, providing a sterically and electronically tuned side chain for peptide and peptidomimetic design. The N-Boc protection makes it a practical building block for controlled incorporation into protected peptide intermediates, while the modified aromatic ring supports SAR studies where hydrophobic bulk and ring substitution patterns are key variables. Researchers commonly select this chiral amino acid derivative to introduce a non-natural aromatic environment at a specific position during custom peptide synthesis and medicinal chemistry lead optimization.
1. Peptidomimetic Building Blocks
Boc-3,4-Dimethy-D-Phenylalanine is used by medicinal chemistry and peptide chemistry groups to construct peptidomimetic scaffolds that probe how aromatic substitution and increased hydrophobic character influence structure and function. The 3,4-dimethyl phenyl side chain provides a defined steric profile that can be leveraged in structure-activity relationship (SAR) workflows, particularly when comparing analogs that differ only by aromatic ring substitution. Its Boc-protected amine supports downstream assembly into protected peptide segments, enabling consistent positional incorporation during custom peptide synthesis and analog libraries.
2. Protected Amino Acid Intermediates
Boc-3,4-Dimethy-D-Phenylalanine serves as a protected amino acid intermediate for solution-phase or automated peptide-manufacturing workflows that rely on stable N-protection during segment coupling and purification. The presence of the Boc group supports handling as a discrete, weighable building block for preparing defined peptide fragments where the modified D-phenylalanine residue must remain intact until final deprotection steps. This format is especially useful for developers producing gram-scale peptide intermediates for subsequent derivatization, SAR panel synthesis, or scale-up of advanced analogs in pharmaceutical intermediate development.
3. Stereodefined SAR Analogues
Boc-3,4-Dimethy-D-Phenylalanine is frequently selected for stereodefined analog generation in chemical biology and medicinal chemistry programs that require systematic variation of stereochemistry and aromatic substitution patterns. By maintaining a defined D-configuration and a substituted aromatic ring, the building block enables researchers to attribute observed changes in peptide properties to specific stereochemical and side-chain modifications rather than to mixture effects. In practice, it supports the rapid preparation of position-specific variants used to map sequence-level structure-property relationships in peptide-based leads and peptidomimetic candidates.
4. Custom Peptide Library Synthesis
Boc-3,4-Dimethy-D-Phenylalanine is applied in the synthesis of customized peptide libraries where aromatic ring substitution is used as a controllable design element. Peptide discovery teams and CROs use such protected amino acid derivatives to build series of analogs that differ at one or more residues, allowing efficient exploration of how 3,4-dimethyl substitution affects physicochemical behavior and conformational preferences within a peptide context. The Boc-protected form supports integration into protected intermediate workflows, helping ensure that the modified residue is introduced reliably at the intended sequence position during library production.
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