Cbz-2,3-Dimethy-L-Phenylalanine is a Cbz-protected, α-amino acid derivative bearing a phenylalanine-derived side chain substituted at the 2- and 3-positions with methyl groups, classifying it as a modified aromatic amino acid for peptide chemistry. The molecule contains a free carboxyl functional group, an N-terminus protected as a benzyloxycarbonyl (Cbz) carbamate, and stereochemistry indicated by the "L" designation at the α-carbon, while the benzylic carbamate and methyl-substituted aromatic side chain modulate steric and hydrophobic character. In synthesis and structure-activity studies, the Cbz-protected amino acid is used as a building block for preparing peptide analogues via stepwise coupling, where the protected amine supports chemoselective formation of amide bonds and the 2,3-dimethyl substitution enables probing of steric effects in peptide and protein contexts.
CAT No: CP13808
Cbz-2,3-Dimethy-L-Phenylalanine is an N-Cbz protected, L-configured phenylalanine derivative bearing two adjacent methyl substituents at the 2- and 3-positions, creating a sterically defined chiral amino acid framework. The molecule contains a benzyloxycarbonyl (Cbz) carbamate on the amino group and a free carboxylic acid (or acid-form equivalent depending on salt formation), with a benzyl side chain that provides a hydrophobic aromatic handle for peptide and peptidomimetic design. The α,β-disubstituted stereocenters and the bulky side-chain environment influence coupling reactivity, steric approach during peptide bond formation, and downstream stereochemical outcomes in derivatization. The Cbz group supports orthogonal protection strategies compatible with standard peptide synthesis cycles, while the carboxyl functionality enables conversion to activated esters or amide-forming intermediates for synthetic route development.
1. Peptide Synthesis
Cbz-2,3-Dimethy-L-Phenylalanine is applied in peptide building-block preparation where the Cbz-protected amine and carboxyl group support controlled peptide coupling chemistry. The α,β-disubstituted stereocenters adjacent to the carbonyl can be incorporated as a sterically constrained residue to modulate backbone conformation and side-chain packing in short peptides and longer peptide segments. The aromatic phenylalanine side chain and the geminal methyl pattern can be exploited to generate analogs with altered protease recognition profiles in biochemical research workflows, while maintaining compatibility with common N-protection/deprotection sequences. The resulting peptide intermediates can be carried forward into fragment assembly, solid-phase or solution-phase synthesis, and subsequent functionalization steps that require a stable N-Cbz handle.
2. Peptidomimetics Design
Cbz-2,3-Dimethy-L-Phenylalanine is utilized in peptidomimetic construction where the bulky 2,3-dimethyl substitution pattern functions as a conformational and steric element within an amino acid scaffold. The N-Cbz carbamate and carboxylic acid functionality enable conversion into amide-forming derivatives that can be incorporated into non-natural peptide analogs, including backbone-modified or side-chain functionalized series. The stereodefined L-configuration supports consistent stereochemical presentation at the residue level, which can be important for structure-activity relationship studies that probe how local sterics influence binding-site geometry. The aromatic side chain provides a hydrophobic anchor for molecular recognition, supporting downstream synthesis of constrained libraries and fragment-like motifs for medicinal chemistry exploration.
3. Chiral Synthesis Intermediate
Cbz-2,3-Dimethy-L-Phenylalanine is used as a chiral amino acid intermediate in stereoselective synthesis programs that require a protected amine and a carboxyl group positioned for controlled functional-group interconversion. The adjacent methyl substituents at the 2- and 3-positions create a defined steric environment that can direct subsequent transformations such as esterification, activation to coupling reagents, or conversion to amide derivatives for stepwise scaffold elaboration. The Cbz protecting group supports orthogonal chemistry, enabling selective deprotection under hydrogenolysis conditions while leaving other functional groups intact in multi-step sequences. Downstream, the compound can serve as a starting point for preparing chiral derivatives used in synthetic methodology development, stereochemical mapping studies, and the manufacture of amino acid-based intermediates for fine chemical synthesis.
4. Side-Chain Functionalization
Cbz-2,3-Dimethy-L-Phenylalanine is applied in side-chain functionalization and amino acid modification strategies where the phenylalanine-derived aromatic moiety can be leveraged for further chemical elaboration. The protected amino group (Cbz) and carboxyl functionality allow selective derivatization at the residue level, including formation of activated carboxyl derivatives for conjugation to amines or attachment to linkers used in chemical biology probes. The sterically hindered α,β-disubstituted backbone can influence the reactivity profile of intermediates and can be used to tune stability of resulting amide or ester linkages in downstream conjugates. The stereodefined L-configuration helps preserve stereochemical integrity during intermediate preparation, enabling consistent generation of labeled or functionalized amino acid derivatives for analytical and biochemical research workflows.
5. Pharmaceutical Intermediate Preparation
Cbz-2,3-Dimethy-L-Phenylalanine is relevant to pharmaceutical intermediate preparation where protected amino acid derivatives are used to build peptidic or peptidomimetic fragments under process-compatible protection strategies. The Cbz carbamate provides a robust N-protection handle that can be maintained through coupling and activation steps, supporting manufacturing route design that separates N-deprotection from other functional-group transformations. The carboxylic acid functionality enables conversion to activated intermediates suited for amide bond formation with diverse nucleophiles, facilitating scalable synthesis of defined stereochemical building blocks. The sterically constrained 2,3-dimethyl substitution pattern can be incorporated into medicinal chemistry libraries and downstream process sequences that require reproducible stereochemical outcomes and stable, isolable intermediates for specialty chemical production.
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