Bz-DL-Arg-betaNA · HCl

Bz-DL-Arg-betaNA · HCl is a benzyl-protected arginine derivative presented as the hydrochloride salt, combining an N-benzoyl (Bz) protected guanidinium-containing amino acid framework with a β-amino acid motif bearing a β-nitroaniline (betaNA) substituent. The arginine side chain exists in a strongly basic, salt-forming guanidinium state under acidic conditions, while the N-acyl protection modulates amide formation and peptide coupling compatibility. The presence of a defined chiral amino acid backbone in the DL (racemic) form introduces stereochemical diversity that can be resolved or carried through as a mixture depending on the synthetic objective. The βNA functionality provides an aniline-bearing chromophore/handle that can participate in downstream derivatization and analytical readouts, making the compound a practical intermediate for amino acid modification and peptide/peptidomimetic construction.

1. Peptide Synthesis

Bz-DL-Arg-betaNA · HCl supports peptide building workflows where an N-acyl protected arginine unit is required for controlled amide bond formation. The N-benzoyl group helps regulate reactivity at the α-amino position during coupling, while the guanidinium side chain, present as a hydrochloride-associated functionality, can be managed through salt behavior and subsequent side-chain protection/deprotection strategies when assembling longer sequences. The β-amino acid character and βNA substituent enable incorporation into peptide analogs that include noncanonical linkers and chromophore-bearing motifs for structure-function studies. Downstream, the resulting protected amino acid derivative can be converted into peptide fragments used in synthetic methodology development and sequence-specific scaffold generation.

2. Chemical Biology Probes

Bz-DL-Arg-betaNA · HCl is suitable for chemical biology research that leverages arginine-like cationic recognition and an aniline-containing βNA handle for probe construction. The guanidinium functionality can participate in electrostatic and hydrogen-bonding interactions typical of arginine-rich binding motifs, while the βNA moiety can serve as a spectroscopic reporter or a functional handle for further conjugation chemistry. The N-benzoyl protection provides a stable platform for introducing the residue into larger biomolecule-binding constructs without uncontrolled side reactions at the α-amino site. Racemic (DL) stereochemistry may be applied when probe libraries or comparative studies require mixed stereochemical inputs prior to resolution or stereodefined elaboration.

3. Peptidomimetics And SAR Studies

Bz-DL-Arg-betaNA · HCl can be employed in peptidomimetic design and structure-activity relationship studies where a cationic arginine-like side chain and a β-substituted aromatic fragment are combined in one chiral amino acid intermediate. The N-benzoyl group and the amino acid backbone enable systematic variation of coupling partners to generate analog series with altered spacing, electronics, and local polarity around the βNA chromophore. The β-amino acid architecture supports the construction of constrained or extended peptide-mimic scaffolds that can be used to interrogate how side-chain charge presentation and aromatic substitution affect molecular recognition. The DL stereochemical form can be used for rapid analog generation, with stereochemical refinement applied in later stages when stereodependence is assessed.

4. Analytical Standards Development

Bz-DL-Arg-betaNA · HCl is applicable to analytical research where amino acid derivative standards and method development require a defined protected arginine motif with a built-in UV-active βNA chromophore. The βNA aniline-containing functionality can facilitate detection by UV/Vis methods, while the N-benzoyl protection and salt form help maintain reproducible chromatographic behavior during derivatization or monitoring steps. The guanidinium-bearing side chain supports consistent ionization characteristics under acidic conditions, aiding method transfer for LC-based workflows that track amino acid derivatives and peptide fragments. Racemic composition can be advantageous for calibration and for establishing analytical response factors when stereospecific resolution is not required.

5. Process Chemistry Intermediate

Bz-DL-Arg-betaNA · HCl serves as a chiral amino acid intermediate for process chemistry and fine chemical synthesis routes that require a protected arginine derivative with a functional β-aniline handle. The N-benzoyl protection provides a practical handle for controlling chemoselectivity during downstream transformations, while the hydrochloride salt form can improve handling and reproducibility of the guanidinium-containing intermediate in manufacturing-oriented operations. The βNA substituent can be carried through as a stable tag for monitoring and for later conversion to additional functional groups, supporting multi-step synthesis planning. DL stereochemistry can be leveraged in cost- and throughput-oriented intermediate preparation, with resolution or stereoselective downstream steps introduced when stereodefined products are required.

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