D-3-Methylaspartic acid is a D-configured, non-proteinogenic amino acid derivative of the aspartic acid scaffold in which a methyl substituent is present at the 3-position of the side chain. The molecule contains both an amino group and a carboxylic acid group on the α-carbon framework and bears a side-chain carboxylate functionality characteristic of aspartate analogues, with the additional methyl group altering side-chain sterics and hydrogen-bonding patterns. As a chemically defined amino acid analogue, it is used in amino acid and peptide-structure studies, structure-activity investigations, and analytical method development where a substituted aspartate residue is required for controlled incorporation or comparative labeling.
CAT No: CP08003
D-3-Methylaspartic acid is a D-configured aspartic acid derivative in which the side chain bears a methyl substituent at the 3-position, creating a stereochemically defined, chiral amino acid framework. The molecule contains a primary amino group and a carboxylic acid functionality on the α-carbon, along with a second carboxylic acid on the aspartate side chain, enabling strong ionic interactions and predictable acid-base behavior across peptide-coupling conditions. The additional methyl substituent modulates steric profile and conformational preferences relative to unsubstituted aspartate, which can influence reactivity in derivatization and the geometry of amide bond formation. As a chiral amino acid building block and research intermediate, D-3-Methylaspartic acid can be converted into protected amino acid forms, activated derivatives, and downstream analogs for peptide construction and structure-based synthetic studies.
1. Peptide Synthesis
D-3-Methylaspartic acid supports peptide building workflows where aspartate-like side-chain carboxyl functionality enables orthogonal coupling strategies. The α-amino and two carboxyl groups can be managed through protection-group selection, such as N-protection for controlled amide formation and side-chain carboxyl protection to prevent competing intramolecular reactions during stepwise peptide assembly. The D-stereochemistry at the chiral center provides stereochemical control for generating defined peptide stereoisomers and for evaluating how side-chain methyl substitution affects backbone/side-chain packing. Peptide-grade derivatives prepared from D-3-Methylaspartic acid can be used to construct aspartate analog peptides, including constrained or sterically tuned sequences used in biochemical research and peptidomimetic design.
2. Amino Acid Derivatization
D-3-Methylaspartic acid is suitable for amino acid derivatization routes that target either the α-amino group or the side-chain carboxyl group for selective functional transformation. Methyl-substituted aspartate geometry can be leveraged to tune reactivity in esterification, amidation, and carboxyl activation chemistry, enabling synthesis of amino acid esters, mixed anhydrides, or amide-linked intermediates for downstream scaffold elaboration. Protecting-group strategies can incorporate orthogonal protection of the two carboxyl groups to allow sequential modification, including conversion to activated intermediates for fragment coupling or to stable derivatives for analytical reference materials. Resulting D-3-methylaspartate derivatives can serve as biochemical research intermediates and as chiral building blocks for fine chemical synthesis where stereodefined amino acid functionality is required.
3. Chemical Biology Probes
D-3-Methylaspartic acid can be applied in chemical biology contexts requiring stereochemically defined amino acid analogs that participate in biochemical recognition processes. The presence of two carboxylate groups and a D-configured chiral center enables incorporation into peptide-like structures or conjugates that can engage binding sites through charge complementarity and hydrogen-bonding networks. Side-chain methyl substitution provides a steric and conformational perturbation relative to canonical aspartate, which can be used to probe substrate tolerance, binding pocket geometry, or structure-activity relationship trends in enzyme and receptor systems. Downstream conjugation-ready derivatives derived from D-3-Methylaspartic acid can be used to generate labeled or immobilizable analogs for biochemical investigation and molecular recognition studies.
4. Enzyme Substrate Studies
D-3-Methylaspartic acid is suitable for enzyme substrate and inhibitor-design research where aspartate-like functionality and defined stereochemistry influence recognition and catalytic turnover. The dual carboxyl groups can mimic key binding interactions typical of acidic amino acid substrates, while the 3-methyl substituent can modulate steric access to active-site residues and alter local conformational preferences. Derivatization into peptide-mimicking formats, such as carboxyl-activated analogs or protected amino acid intermediates for incorporation into longer constructs, can support systematic studies of how substitution patterns affect enzyme-substrate compatibility. Stereochemically controlled D-3-Methylaspartic acid derivatives can therefore function as research intermediates for SAR-driven mechanistic evaluation and for generating analog series used in biochemical assay development.
5. Pharmaceutical Intermediate Preparation
D-3-Methylaspartic acid functions as a chiral amino acid intermediate for pharmaceutical manufacturing supply chains that require stereodefined building blocks for peptide-like active ingredients or process intermediates. The amino acid's protected forms can be designed to withstand peptide coupling conditions and subsequent deprotection steps, enabling incorporation into larger frameworks while preserving the D-configuration. Carboxyl-group reactivity supports conversion into activated intermediates for amide bond formation, which can be integrated into synthetic routes for peptidomimetics, protease-modulating scaffolds, or other amino acid-derived structures. Industrially, D-3-Methylaspartic acid-derived intermediates can be employed as controlled stereochemical inputs for fine chemical synthesis and specialty chemical production where consistent chiral identity is required.
6. Analytical Research Standards
D-3-Methylaspartic acid can be utilized to prepare analytical standards and calibration materials for amino acid profiling, stereochemical method development, and impurity characterization. The defined D-configuration and methyl-substituted side chain provide distinguishable chromatographic and derivatization behavior compared with non-methylated aspartate analogs, supporting method discrimination in chiral or derivatization-based workflows. Conversion into protected derivatives or isotopically labeled analogs can further enable LC-MS or GC-based detection strategies that separate closely related amino acid species. D-3-Methylaspartic acid-based reference materials thereby support robust analytical research and quality-focused characterization of amino acid derivative streams in chemical manufacturing contexts.
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