Boc-3,5-Dimethy-L-Phenylalanine is a Boc-protected, L-phenylalanine-derived amino acid derivative featuring a phenyl ring substituted with methyl groups at the 3 and 5 positions. The molecule contains a free carboxyl group and a Boc-protected amino functionality, with the side chain presenting a hydrophobic aromatic surface that can influence steric and electronic properties during peptide assembly. As a protected amino acid building block for stepwise peptide synthesis, it supports controlled chemoselectivity by masking the amine while providing the carboxyl group for coupling to form peptide bonds.
CAT No: CP14304
Boc-3,5-Dimethy-L-Phenylalanine is an N-Boc-protected, L-configured phenylalanine derivative bearing two methyl substituents at the 3,5-positions of the aromatic ring. This sterically and electronically modified side chain is commonly used to introduce bulky, hydrophobic aromatic features into peptide sequences and peptide-based intermediates, where it can influence conformational preferences and local packing. As a protected amino acid building block, it is designed for controlled incorporation during peptide assembly workflows that rely on Boc-compatible strategies.
1. Boc-Based Peptide Synthesis
Boc-3,5-Dimethy-L-Phenylalanine is used as an amino acid building block for constructing peptides where the 3,5-dimethyl-substituted phenylalanine residue provides a sterically congested aromatic side chain. Peptide synthesis groups and custom peptide manufacturers select this residue when they want to modulate hydrophobic character and aromatic packing without changing the peptide backbone stereochemistry. The N-Boc protection supports its use in Boc-based assembly approaches, enabling reliable handling of the amino functionality during stepwise sequence construction and segment coupling.
2. Peptidomimetic And SAR Building
Boc-3,5-Dimethy-L-Phenylalanine is frequently incorporated into peptidomimetic scaffolds and structure-activity relationship (SAR) series to probe how aromatic substitution patterns affect properties such as conformation, aggregation tendency, and side-chain microenvironment. Medicinal chemistry teams use this building block to systematically vary the steric bulk and substitution on the phenyl ring while keeping the core amino acid identity consistent. The resulting analogs are valuable for downstream biological and biophysical evaluation workflows where the goal is to understand how side-chain architecture contributes to molecular performance.
3. Hydrophobic Core Engineering
Boc-3,5-Dimethy-L-Phenylalanine supports the design of peptide segments intended to form hydrophobic cores or stabilize defined local structures through aromatic interactions. Protein engineering and chemical biology laboratories often use aromatic, substituted phenylalanine residues as sequence elements that can strengthen intramolecular contacts in designed peptides, including receptor-binding mimics and protein-peptide interaction tools. The 3,5-dimethyl substitution pattern provides additional steric shielding around the aromatic face, which can be leveraged to tune how the residue participates in packing within larger peptide constructs.
4. Pharmaceutical Intermediate Development
Boc-3,5-Dimethy-L-Phenylalanine is also used as a protected amino acid intermediate for preparing substituted aromatic building blocks that feed into larger synthesis campaigns. Process development and pharmaceutical intermediate teams select this reagent when they need a defined, stereochemically consistent amino acid motif bearing a bulky 3,5-dimethyl phenyl group for subsequent derivatization steps. Its protected form supports controlled downstream transformations, making it a practical choice for assembling complex peptide-related intermediates used in research and development pipelines.
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