H-DL-Ala-OMe · HCl

H-DL-Ala-OMe · HCl is a hydrochloride salt of the methyl ester of alanine with an H on the amino terminus, presented as a DL (racemic) mixture that contains both stereochemical configurations at the alanine α-carbon. The structure combines a protected or neutralized amino functionality (as the amino ester hydrochloride salt) with an ester carbonyl that is readily activated for subsequent transformations, while the small aliphatic side chain supports incorporation into peptide-like frameworks without introducing bulky steric effects. The salt form improves handling of the amino ester in synthetic operations and can influence coupling conditions by moderating amine basicity. The compound therefore functions as a chiral-context precursor and reactive amino acid ester intermediate for alanine-derived building blocks, peptide coupling chemistry, and downstream conversion to amide, acid, or protected amino acid derivatives.

1. Protected Amino Acid Synthesis

H-DL-Ala-OMe · HCl is applied in protected amino acid synthesis workflows where alanine ester intermediates are converted into N-protected amino acid building blocks for peptide coupling chemistry. The amino ester hydrochloride provides a controlled amine state for installation of standard N-protecting groups, while the methyl ester can be selectively hydrolyzed or transesterified to enable formation of activated carboxylic acid derivatives. The DL stereochemical mixture is suitable for generating racemic alanine-containing intermediates used in method development, library synthesis, and process scouting where enantiopurity is not required. Downstream, the resulting protected alanine derivatives can be carried into solid-phase or solution-phase peptide assembly and into manufacturing routes that rely on robust, scalable amino acid ester handling.

2. Peptide Coupling Chemistry

H-DL-Ala-OMe · HCl serves as a reactive alanine amino acid ester component for peptide coupling chemistry and amide-bond construction in peptide building block preparation. The ester carbonyl participates in activation and conversion to carboxylate equivalents, enabling formation of peptide-like linkages with amines under standard coupling strategies after appropriate functional group adjustment. The presence of the α-amino group as a hydrochloride salt supports predictable reactivity during derivatization steps that precede coupling, including ester-to-acid conversion and N-protection selection. Racemic incorporation can be leveraged for generating alanine-containing peptide analogs used in structure-activity relationship studies, synthetic method evaluation, and sequence variants where stereochemical uniformity is not a primary constraint.

3. Chiral Building Block Development

H-DL-Ala-OMe · HCl is used as a chiral-context starting material in chiral building block development programs that require alanine-based intermediates for subsequent stereochemical control. The compound's DL nature allows preparation of both stereoisomer-derived derivatives after resolution or stereoselective transformation steps, while the small side chain reduces conformational complexity during downstream derivatization. The methyl ester functionality can be manipulated to install leaving groups or convert to acid forms that are compatible with chiral auxiliary or chiral catalyst strategies in later stages. The resulting stereochemically defined alanine derivatives can then be incorporated into peptidomimetic scaffolds, enzyme substrate analogs, or analytical standards where α-amino acid stereochemistry influences molecular recognition.

4. Amino Acid Derivatization Intermediates

H-DL-Ala-OMe · HCl supports amino acid derivatization intermediates for fine chemical synthesis and downstream functional group transformations. The ester group can be hydrolyzed to the corresponding carboxylic acid, converted to acylating agents, or transesterified to alternative alkyl esters that match specific process constraints. The amino functionality can be further functionalized through N-alkylation, N-protection/deprotection sequencing, or conversion into amide derivatives that serve as precursors for heterocycle formation. Racemic alanine derivatives derived from this salt can be routed into broader amino acid chemistry campaigns, including preparation of peptide fragments, labeled or modified analogs, and intermediate streams feeding larger synthesis programs.

5. Pharmaceutical Intermediate Preparation

H-DL-Ala-OMe · HCl is relevant to pharmaceutical intermediate preparation where alanine-derived fragments are required for building peptide-like motifs or for generating small-molecule scaffolds containing amide linkages. The amino acid ester format enables controlled conversion into carboxylic acid and activated derivatives that can be coupled to amines, supporting intermediate construction in medicinal chemistry and process chemistry. The hydrochloride salt form can improve operational handling during protection and activation steps, which is often important for industrially scalable synthesis of amino acid-based intermediates. Racemic material can be appropriate for early-stage route development, impurity profiling studies, and manufacturing of non-stereospecific intermediate sets that later undergo resolution or stereoselective steps when needed.

6. Analytical Research Standards

H-DL-Ala-OMe · HCl can be employed in analytical research as an alanine ester reference material for method development in amino acid ester and peptide-related assays. The defined functional groups, including the ester carbonyl and amine salt form, provide a consistent chemical signature for chromatographic separation and mass spectrometric characterization of alanine-containing species. The DL stereochemical composition can be useful for calibrating racemate-aware quantitation workflows, monitoring hydrolysis or transesterification progress, and tracking conversion of amino acid ester intermediates during synthesis. Downstream analytical standards prepared from this starting material can support quality-by-design monitoring of peptide coupling feedstocks, impurity identification in amino acid derivative manufacturing, and routine verification of intermediate identity in applied peptide science.

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