H-Ala-NHMe · HCl

H-Ala-NHMe · HCl is an alanine-based amino acid derivative presented as the hydrochloride salt, featuring a primary amino group on the alpha carbon (as an N-terminus) and a methylamide functionality (NHMe) at the carboxyl-derived position. The molecule bears the stereogenic center characteristic of alanine, with the H-configuration on the alpha carbon and a salt-associated proton that modulates amine basicity and handling. The amide carbonyl and the N-methyl amide reduce direct carboxyl reactivity while enabling controlled peptide-like coupling chemistry through the available amino functionality. The hydrochloride form supports aqueous compatibility for downstream transformations and can serve as a chiral, protected-by-functionality intermediate for constructing alanine-containing motifs in peptide and peptidomimetic synthesis.

1. Peptide Coupling Building Block

H-Ala-NHMe · HCl is applied in peptide synthesis workflows where an alanine-derived, carboxamide-terminated building block is required. The N-terminal amino group can participate in standard peptide coupling strategies, while the methylamide at the former carboxyl position functions as a stable C-terminal mimic that avoids uncontrolled side reactions typical of free acids. Salt formation with HCl can improve reproducibility of handling and can influence coupling conditions by moderating amine protonation states. The resulting alanine-containing fragments can be assembled into short peptides, peptide analogs, or protected-sequence intermediates for subsequent deprotection and purification steps.

2. Chemical Biology Labeling

H-Ala-NHMe · HCl is suitable for chemical biology research that requires incorporation of an alanine residue into reactive or recognition-bearing scaffolds. The primary amino group enables attachment to activated electrophiles used for bioconjugation, including acylating agents and coupling handles designed for amide formation. The methylamide carbonyl provides a defined hydrogen-bonding pattern and conformational constraint relative to free carboxylates, which can be advantageous when tuning molecular recognition in biomolecule-binding assays. Downstream derivatives can be used to generate labeled peptides, probe libraries, or assay standards that reflect alanine's stereochemical identity.

3. Chiral Amino Acid Intermediate

H-Ala-NHMe · HCl functions as a chiral alanine intermediate for stereochemically defined synthesis of amino acid derivatives and peptidomimetic backbones. The preserved alpha stereocenter supports consistent stereochemical outcomes when the N-terminal amino group is converted into peptide bonds or when the compound is transformed into further functional derivatives. The absence of a free carboxyl group shifts reactivity toward amide chemistry, enabling controlled elaboration of the N-terminus without requiring carboxyl protection strategies. The hydrochloride salt form can be leveraged to manage solubility and protonation during intermediate preparation for fine chemical synthesis and research-scale library generation.

4. Process Chemistry Intermediate

H-Ala-NHMe · HCl is applicable to process chemistry intermediate preparation where stable, isolable amino acid derivatives are needed for scalable synthesis. The methylamide functionality provides a robust handle for downstream transformations that do not rely on free acid activation, reducing variability associated with acid handling and salt formation equilibria. The hydrochloride salt can support reproducible feedstock preparation and can be integrated into manufacturing routes that require consistent amine availability for coupling steps. The compound can be employed as a controlled stereochemical input in the production of alanine-containing intermediates used for peptide manufacturing and specialty chemical production.

5. Analytical Reference Material

H-Ala-NHMe · HCl can serve as an analytical reference for method development and identity verification in amino acid derivative and peptide-related analyses. The combination of an alanine-derived stereocenter, a methylamide carbonyl, and an N-terminal amino group yields a characteristic fragmentation and chromatographic behavior distinct from free alanine or simple amides. Hydrochloride salt formation can improve reproducibility in sample preparation for LC-MS or electrophoretic workflows that are sensitive to protonation state. The compound can be utilized to calibrate quantitation, support impurity profiling, and validate analytical selectivity for alanine-containing building blocks and C-terminal methylamide motifs.

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