H-Ala-betaNA · HBr is a protected amino acid derivative in which alanine is attached to a beta-naphthylamine (betaNA) moiety, forming a substituted alanine building block rather than a free amino acid. The molecule bears an amino functionality and a carboxyl-derived alanine framework, while the "· HBr" indicates association with hydrobromide to form a salt that can improve handling and define ionic character. It is employed as a chemically defined substrate or coupling component in peptide-related synthesis and analytical or labeling workflows where a beta-naphthylamine-containing alanine derivative provides a spectroscopic or conjugation handle.
H-Ala-betaNA · HBr is a hydrobromide salt form of an alanine-derived amino acid derivative, where the alanine α-amino and α-carboxyl functionalities are present as a protected/activated residue suitable for peptide and intermediate chemistry, and the βNA substituent introduces an additional nitrogen-containing motif that can influence polarity, solubility, and coupling behavior. The salt counterion (HBr) stabilizes the basic nitrogen sites and can affect handling, crystallinity, and subsequent deprotection or neutralization steps in synthetic sequences. The stereogenic center associated with alanine provides defined chiral information for stereoselective incorporation into peptide-like constructs. The combination of an amino acid backbone with a β-substituted nitrogen functionality makes the compound compatible with protected amino acid synthesis logic and downstream derivatization into N- and side-chain modified intermediates.
1. Peptide Coupling Chemistry
H-Ala-betaNA · HBr is applied in peptide synthesis workflows where a chiral alanine-derived building block is required for amide bond formation. The amino acid backbone and β-substituted nitrogen functionality can be leveraged to control chemoselective coupling, while the hydrobromide salt form supports reproducible handling prior to activation. Salt stabilization of basic sites can be used to manage reactivity during standard peptide coupling cycles and subsequent purification of protected amino acid derivatives. The resulting coupled products can serve as intermediates for generating short peptides, peptide fragments, or peptide-like scaffolds used in biochemical research and synthetic methodology development.
2. Unnatural Amino Acid Incorporation
H-Ala-betaNA · HBr functions as a chiral amino acid analog for constructing peptide analogs that incorporate altered side-chain electronics and hydrogen-bonding patterns. The βNA substituent introduces an additional nitrogen-containing feature that can participate in intermolecular recognition and can alter conformational preferences relative to native alanine residues. The defined stereochemistry at the alanine center enables stereochemically consistent incorporation into peptide chains for structure-activity relationship studies and molecular design. Downstream derivatization of the incorporated residue can support generation of conformationally tuned peptidomimetics and unnatural amino acid-containing libraries.
3. Chemical Biology Probes
H-Ala-betaNA · HBr can be used in chemical biology research to prepare amino acid-based probes and labeled peptide fragments that rely on controlled functional group presentation. The presence of an amino acid backbone supports conjugation strategies through peptide coupling to targeting motifs, while the βNA nitrogen-containing motif can enable further functional transformations such as N-alkylation, N-acylation, or conversion to heteroatom-linked handles depending on protection state. Hydrobromide salt formation helps solubilize or stabilize nitrogen-containing functionalities during intermediate preparation prior to conjugation to biomolecule-reactive scaffolds. The resulting probe constructs can be used to study biomolecular interactions, binding-site preferences, and residue-level contributions in peptide recognition contexts.
4. Pharmaceutical Intermediate Preparation
H-Ala-betaNA · HBr is suitable for process chemistry and fine chemical synthesis routes that require chiral amino acid intermediates for medicinal chemistry programs. The alanine-derived stereocenter and amino acid functional groups enable integration into larger synthetic sequences, including stepwise assembly of peptide-like fragments and subsequent conversion into amide-containing intermediates. The hydrobromide salt form can be leveraged to manage salt formation and isolate intermediates in a reproducible solid form prior to downstream activation or protection-group adjustments. The compound can therefore serve as a chiral starting material for manufacturing-oriented synthesis of amino acid derivatives and peptidomimetic building blocks used in industrial chemical production.
5. Analytical Research Standards
H-Ala-betaNA · HBr is applicable to analytical research as a reference material for method development targeting amino acid derivatives, peptide fragments, or nitrogen-containing chiral intermediates. The defined alanine stereochemistry and the βNA functional motif provide characteristic chromatographic and spectroscopic signatures that can support identification and quantitation in complex mixtures. Hydrobromide salt identity can improve reproducibility of sample preparation and can influence ionization behavior in LC-MS workflows used for peptide synthesis monitoring. The compound can be employed as an analytical standard or calibration component for verifying protected amino acid synthesis steps, residue incorporation, and impurity profiling in amino acid derivative manufacturing.
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