H-alpha-Me-DL-Phe-OMe · HCl

H-alpha-Me-DL-Phe-OMe · HCl is a hydrochloride salt of a methyl-branched phenylalanine methyl ester, featuring a chiral α-carbon bearing an additional methyl substituent (H-α-Me) and a para-unsubstituted phenyl side chain typical of Phe-derived peptide building blocks. The molecule is present as an amino ester hydrochloride, combining a protected-like ester functionality (Phe-OMe) with a protonated amine that supports controlled handling during coupling and subsequent transformations. The DL stereochemistry introduces racemic α-center composition, which can be exploited for method development, racemate-to-enantiomer workflows, or comparative structure-property studies. The ester group can participate in peptide coupling sequences after conversion to activated carboxyl derivatives, while the side-chain phenyl ring enables aromatic-specific derivatization, π-interactions in molecular design, and downstream formation of peptidomimetic scaffolds.

1. Peptide Synthesis

H-alpha-Me-DL-Phe-OMe · HCl is applied in peptide building block preparation where the phenylalanine-derived side chain and the α-amino ester framework support incorporation into short peptide sequences or peptide analogs after conversion of the ester into a coupling-ready carboxyl equivalent. The hydrochloride form stabilizes the amino functionality for controlled activation chemistry, and the α-methyl substitution can be used to probe steric effects on amide bond formation and conformational preferences. Racemic stereochemistry can be leveraged for coupling-condition screening, followed by stereochemical resolution or separation of diastereomeric intermediates when enantioenriched targets are required. Downstream, the resulting peptide fragments can feed into SAR studies, peptide library synthesis, and synthetic methodology development for α-substituted amino acid residues.

2. Chiral Building Block Development

H-alpha-Me-DL-Phe-OMe · HCl serves as a starting point for chiral amino acid intermediate workflows that address the α-methyl stereocenter introduced on the phenylalanine backbone. The DL configuration provides a practical substrate for resolution strategies such as formation of diastereomeric derivatives or chromatographic separation, while the methyl ester and protonated amine enable selective functional-group manipulation during stereochemical enrichment. The preserved phenyl side chain supports retention of aromatic recognition motifs while the α-methyl group can be used to generate stereochemically defined conformational constraints in later peptide or peptidomimetic constructs. The stereochemically controlled derivatives obtained from this intermediate can then be used to build enantioenriched analogs for structure-function comparisons and chiral synthesis method validation.

3. Amino Acid Derivatization

H-alpha-Me-DL-Phe-OMe · HCl is suitable for amino acid derivatization and protected amino acid chemistry where the methyl ester can be transformed into alternative carboxyl formats for subsequent coupling chemistry. The ester functionality can be hydrolyzed to the corresponding acid, re-esterified to different alkyl groups, or converted into activated intermediates compatible with standard peptide coupling reagents, enabling flexible downstream synthetic routes. The α-methyl substitution and phenyl side chain allow targeted modification strategies that tune steric bulk and aromatic electronics, supporting synthesis of substituted amino acid derivatives used in fragment-based molecular design. The hydrochloride salt format also facilitates reproducible handling for functional-group interconversions, making it relevant to fine chemical synthesis and chemical manufacturing intermediate preparation.

4. Peptidomimetics And SAR

H-alpha-Me-DL-Phe-OMe · HCl is used in peptidomimetic construction and SAR studies where α-methylation of a phenylalanine residue can modulate backbone conformational tendencies and influence binding-site complementarity. The phenyl ring provides an aromatic handle for hydrophobic and π-interaction-driven molecular recognition, while the α-methyl center can be incorporated into analogs to evaluate steric and conformational effects relative to non-methylated Phe derivatives. The amino ester scaffold supports stepwise assembly into amide-linked frameworks after ester-to-acid conversion or activation, enabling systematic generation of analog series for structure-activity relationship investigations. Racemic availability can support early-stage library synthesis and comparative studies, with later stereochemical refinement applied when enantioselective structure-property relationships are needed.

5. Pharmaceutical Intermediate Preparation

H-alpha-Me-DL-Phe-OMe · HCl functions as a chemical manufacturing intermediate for the synthesis of α-substituted amino acid derivatives used in medicinal chemistry and process chemistry development. The molecule's amino hydrochloride form and methyl ester group provide a practical platform for designing downstream routes that require controlled protection/deprotection logic, including conversion to carboxylic acid or activated ester/carboxylate intermediates for amide bond formation. The α-methyl substituent and phenyl side chain can be carried through manufacturing sequences to generate defined stereochemical or conformational elements within larger intermediates. The resulting derivatives can be applied to the preparation of peptide-like fragments, constrained building blocks, and intermediate sets used for scale-up planning and synthetic route optimization in specialty chemical production.

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