D-Alanine amide hydrochloride

D-Alanine amide hydrochloride is the amide hydrochloride salt of the D-enantiomer of alanine, featuring a chiral α-carbon with a methyl side chain and a terminal carboxamide functionality. The hydrochloride counterion is associated with the amide nitrogen (and/or residual basic sites depending on salt form), which can influence solubility and handling during peptide-coupling or derivatization workflows. The compound's primary reactive motif is the carboxamide group, which can participate in acyl-transfer, N-protection/deprotection planning, and downstream conversion to N-substituted alanine derivatives. As a stereochemically defined amino acid amide, it serves as a controlled chiral building block for synthetic organic chemistry and as a biochemical research intermediate where D-configuration matters for stability and recognition.

1. Peptide Coupling Building Block

D-Alanine amide hydrochloride supports peptide synthesis strategies where a D-alanine-derived amide terminus is required, such as preparing D-Ala-containing fragments or testing coupling chemistries that maintain stereochemical integrity. The D-configuration at the α-carbon and the carboxamide functionality align with workflows that distinguish N- and C-terminal equivalents, enabling planned conversion to protected amino acid derivatives or incorporation into longer sequences via amide bond formation. Salt formation with hydrochloride can be leveraged to improve handling consistency during coupling setup and subsequent neutralization steps in synthetic planning. Downstream, the compound can be converted into D-alanine-based peptide building blocks or used to generate amide-terminated intermediates for fragment assembly in peptide science and peptidomimetic construction.

2. Chiral Amino Acid Derivatization

D-Alanine amide hydrochloride is suitable for chiral amino acid derivatization and stereochemical studies because the D-amino acid backbone provides a defined stereocenter adjacent to the amide. The amide nitrogen can be functionalized through N-acylation or N-alkylation strategies, while the methyl side chain provides a compact hydrophobic handle for tuning reactivity and physicochemical behavior in downstream analogs. The hydrochloride salt form can influence nucleophilicity and solvation, which may be relevant when selecting protecting-group strategies for controlled transformations. Resulting derivatives can serve as chiral intermediates for SAR studies, stereoselective synthesis development, and construction of D-alanine-containing scaffolds used in applied chemical research.

3. Chemical Biology Substrate Analog

D-Alanine amide hydrochloride can be applied in chemical biology research as a D-alanine amide substrate or recognition probe where amide-linked amino acid motifs are used to interrogate enzyme specificity and binding preferences. The carboxamide group mimics an amino acid-derived functional handle that can be recognized by protease-like or amidase-like systems, while the D-configuration can help differentiate stereochemical tolerance and reduce susceptibility to certain proteolytic pathways. Planned derivatization of the amide nitrogen or conversion to labeled analogs can enable biochemical investigation of reaction pathways, substrate turnover, and molecular recognition events. Downstream use may include generating tool compounds for assay development, mechanistic studies, and comparative evaluation of stereochemical effects on enzyme-substrate interactions.

4. Analytical Reference Standard

D-Alanine amide hydrochloride is appropriate for analytical research and method development where enantiomerically defined amino acid amides are used as standards or calibration materials. The defined D-stereochemistry and stable amide functionality support reproducible chromatographic or spectrometric behavior, particularly when evaluating chiral separation performance or monitoring derivatization efficiency. Salt formation with hydrochloride can affect ionization and retention characteristics, which can be incorporated into method selection for LC-MS or related analytical workflows. Resulting analytical standards can be used for quality control of amino acid derivative synthesis, verification of stereochemical outcomes, and characterization of complex peptide or peptidomimetic mixtures containing D-alanine motifs.

5. Pharmaceutical Intermediate Preparation

D-Alanine amide hydrochloride functions as a chiral amino acid-based intermediate for pharmaceutical intermediate preparation and fine chemical synthesis routes that require a D-alanine-derived amide unit. The amide group provides a chemically stable platform for further N-protection planning, conversion to N-substituted intermediates, or transformation into protected amino acid derivatives compatible with peptide coupling chemistry. The hydrochloride salt form can be used to manage reactivity and handling during multi-step syntheses where controlled nucleophilicity and consistent stoichiometry are needed. Downstream manufacturing utility includes supplying stereochemically defined D-alanine-derived building blocks for synthesis of D-amino acid-containing intermediates, process chemistry intermediates, and specialized chemical production workflows that rely on chiral fidelity.

1. Oleic acid and glucose regulate glucagon-like peptide 1 receptor expression in a rat pancreatic ductal cell line

2. Emu oil in combination with other active ingredients for treating skin imperfections

3. Peptides as Active Ingredients: A Challenge for Cosmeceutical Industry

4. Cell-based adhesion assays for isolation of snake venom’s integrin antagonists

5. High fat diet and GLP-1 drugs induce pancreatic injury in mice