H-Asp-4MbetaNA

H-Asp-4MbetaNA is an N-acetylated, side-chain-modified aspartic acid derivative in which the aspartate side chain is functionalized with a 4-methyl-β-naphthylamine (4MβNA) group, yielding a chiral amino acid framework bearing an N-terminal acylated amine and a carboxylic acid functionality. The molecule retains the canonical Asp stereochemical center at the α-carbon while presenting a conjugatable aromatic amine handle at the side chain, enabling controlled reactivity through amide formation, salt formation, and nucleophilic substitution chemistry. The combination of an N-protected amino terminus with a free carboxylic acid supports peptide coupling workflows in which the side-chain aromatic amine can be selectively preserved or transformed depending on the protection and activation strategy. The aromatic amine and carboxylic acid together make the compound suitable for downstream derivatization into labeled building blocks, affinity probes, and peptidomimetic scaffolds that preserve amino acid recognition elements.

1. Peptide Synthesis

H-Asp-4MbetaNA is applied in peptide building block preparation where the N-acetylated amino group and the Asp-derived carboxylic acid enable standard peptide coupling chemistry while maintaining the α-amino acid stereocenter. The side-chain 4MβNA aromatic amine can participate in orthogonal protection schemes, allowing selective side-chain modification or preservation during chain assembly. The presence of an N-terminal acyl group supports compatibility with iterative coupling strategies that require defined terminal functionality for C-terminal extension. The resulting Asp-containing peptide analogs can be used as structural probes, sequence variants, or intermediate substrates for further functionalization, supporting amino acid chemistry workflows from protected amino acid synthesis to peptidomimetic construction.

2. Chemical Biology Labeling

H-Asp-4MbetaNA is used for chemical biology research requiring aromatic amine-bearing amino acid derivatives that can serve as labeling or affinity elements. The 4MβNA moiety provides a nucleophilic aniline functionality that can be converted into conjugation-ready derivatives through amide formation, sulfonamide/urea-type linkages, or electrophile-driven coupling under appropriate conditions. The retained Asp carboxyl group supports incorporation into peptide-like motifs that can influence binding orientation and recognition in biochemical assays. The N-acetylated backbone further provides a defined terminal chemistry that can be matched to downstream conjugation and analytical detection strategies, enabling preparation of labeled amino acid intermediates for molecular recognition studies.

3. Side-Chain Functionalization

H-Asp-4MbetaNA is suitable for side-chain functionalization campaigns in synthetic organic chemistry and applied amino acid derivatization, leveraging the aromatic amine for selective transformation. The compound's chiral Asp scaffold provides a stereochemically defined platform, while the carboxylic acid can be activated for coupling to scaffolds that require an amino acid-derived handle. The 4MβNA group can be tailored into diverse derivatives such as amide-linked tags, heteroatom-containing conjugates, or incorporation points for building larger peptidomimetic frameworks. Downstream synthetic utility includes producing functionalized Asp intermediates that can be carried into fragment elaboration, SAR-focused analog libraries, or process-friendly intermediate streams for specialty chemical production.

4. Analytical Research Standards

H-Asp-4MbetaNA is applicable to analytical research where amino acid derivatives with defined aromatic tags support method development for chromatography and mass spectrometry. The combination of the Asp carboxylic acid and the 4MβNA aromatic amine provides strong chemical identity signals that can assist in tracking derivatization efficiency, monitoring peptide coupling outcomes, or calibrating detection workflows. N-acetylation at the amino terminus stabilizes terminal chemistry and can reduce ambiguity from free amine reactivity during sample handling. The compound can therefore serve as a reference intermediate for analytical standard preparation, impurity mapping, and characterization of peptide-building block transformations in biochemical research and industrial quality-oriented studies.

5. Pharmaceutical Intermediate Preparation

H-Asp-4MbetaNA is relevant to pharmaceutical intermediate preparation and fine chemical synthesis where chiral amino acid derivatives bearing orthogonal reactive sites are required for controlled assembly of peptide-like structures. The N-acetylated amine and Asp carboxylic acid provide a defined coupling pair for generating amide-linked intermediates, while the side-chain aromatic amine can be managed through protection or conversion to enable selective downstream elaboration. The stereochemical integrity at the α-carbon supports the construction of stereodefined analogs used in medicinal chemistry optimization and peptidomimetic design workflows. The compound's functional group pattern supports scalable intermediate generation for specialty chemical production, including preparation of labeled or functionalized amino acid motifs used in process chemistry intermediate chains.

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