H-DL-Ala-betaNA · HCl

H-DL-Ala-betaNA · HCl is a hydrochloride salt of a DL-alanine derivative bearing a beta-naphthylamine (betaNA) functional group, providing a chiral amino acid framework paired with an anilide-like aromatic amine handle for downstream coupling and derivatization. The molecule contains an amino acid α-center with alanine stereochemistry presented as a racemic mixture, alongside a carboxyl functionality that is typically managed under amino acid salt conditions and can be converted into protected or activated forms for peptide chemistry. The betaNA aromatic amine contributes strong conjugation and nucleophilicity, enabling selective transformations such as acylation, sulfonylation, or formation of aromatic amide/urea linkages. The HCl salt form improves handling of the amine functionality and supports synthetic workflows that require controlled protonation states during coupling, purification, and intermediate preparation.

1. Peptide Synthesis

H-DL-Ala-betaNA · HCl is applied in peptide synthesis workflows where an alanine-based building block is required alongside an aromatic amine functionality for orthogonal derivatization. The α-amino acid motif supports standard peptide coupling after conversion to an appropriate activated carboxyl derivative, while the betaNA moiety can be protected or transformed to prevent side reactions during N- and C-terminal bond formation. Racemic (DL) stereochemistry can be used for generating peptide libraries, developing non-stereospecific analogs, or probing backbone tolerance in structure-activity relationship studies. Downstream, the aromatic amine can be carried through as a functional handle for later conjugation or converted into amide or urea linkages to produce stable peptide analogs.

2. Chemical Biology Probes

H-DL-Ala-betaNA · HCl is suitable for chemical biology research requiring an amino acid-derived scaffold with an aromatic amine tag for probe construction. The betaNA aromatic amine can participate in selective conjugation chemistry, including acylation to form fluorescent or affinity-bearing amide derivatives, or coupling to electrophilic handles used for labeling. The alanine backbone supports incorporation into peptide-like motifs that can mimic recognition elements while maintaining a defined handle for downstream detection or immobilization. The hydrochloride salt form can facilitate reproducible handling of the amine during probe assembly, enabling preparation of biomolecule-interacting reagents and analytical standards.

3. Amino Acid Derivatization

H-DL-Ala-betaNA · HCl serves as a chiral amino acid intermediate for amino acid derivatization strategies that leverage both the carboxyl/amine functionality and the betaNA nucleophile. The α-amino acid functionality can be converted into N-protected or activated derivatives to support stepwise synthesis, while the betaNA group enables targeted functional group transformations that introduce aromatic amide, sulfonamide, or urea motifs. DL stereochemistry can be intentionally retained when the objective is to generate racemic reference materials, screening sets, or mechanistic probes where stereochemical discrimination is not required. Resulting derivatives can be used as intermediates for peptidomimetic construction, reagent synthesis for coupling studies, and downstream scaffold diversification in fine chemical synthesis.

4. Bioconjugation Chemistry

H-DL-Ala-betaNA · HCl is utilized in bioconjugation chemistry as an amino acid-based linker precursor that contains a reactive aromatic amine for attachment to biomolecule surfaces. The betaNA moiety can be converted into activated coupling forms or acylated to produce stable conjugation-ready intermediates that react with complementary nucleophiles on proteins, peptides, or polymer supports. The alanine-derived backbone can function as a spacing element that influences local conformation and presentation of the conjugation handle, supporting design of labeled biomolecules and immobilized reagents. The salt form supports reproducible intermediate handling during conjugation assembly, enabling preparation of conjugates used in biochemical research and analytical workflows.

5. Pharmaceutical Intermediate Preparation

H-DL-Ala-betaNA · HCl can be employed in pharmaceutical intermediate preparation where an amino acid-derived fragment with an aromatic amine handle is required for synthetic route design. The α-amino acid core enables conversion to protected amino acid derivatives and activated carboxyl intermediates compatible with peptide coupling or amide-forming steps in medicinal chemistry synthesis. The betaNA functionality supports incorporation into heteroatom-rich motifs through controlled acylation or urea formation, enabling access to structure-activity relationship analogs and fragment-like intermediates. Racemic stereochemistry provides a practical entry point for generating compound sets prior to stereochemical optimization or for routes that tolerate DL composition during early-stage library synthesis.

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