N-α-Benzyl-L-Valine methyl ester hydrochloride is an amino acid ester derivative of L-valine in which the α-amino group is substituted with a benzyl (N-α-benzyl) protecting group and the carboxyl group is esterified as a methyl ester. The molecule contains a branched isopropyl side chain typical of valine, retains the stereogenic center associated with the named L-configuration, and is present as a hydrochloride salt to form a protonated amine that improves handling and defines the salt form. In peptide and amino acid synthesis, this protected ester functions as a stepwise precursor that bears an N-α benzyl-protected amino group and a methyl ester handle for controlled transformations toward more complex valine-containing peptide derivatives.
CAT No: CP02212
N-α-Benzyl-L-Valine methyl ester hydrochloride is an L-valine-derived amino acid methyl ester bearing an N-α-benzyl protecting group and present as a hydrochloride salt. The molecule contains a stereogenic center at the valine α-carbon, a branched isopropyl side chain that supports hydrophobic peptide and ligand interactions, and a methyl ester that can be converted into amides or acids for downstream coupling chemistry. The benzyl-protected amine and ester functionality together create a protected amino acid derivative suitable for controlled peptide assembly, while the hydrochloride form enhances handling of the N-terminus during synthesis. The benzyl group can be removed under hydrogenolysis conditions, and the ester can be hydrolyzed or transformed to enable C-terminal modification, making the compound a practical chiral intermediate for amino acid derivatization and peptide building block preparation.
1. Peptide Synthesis
N-α-Benzyl-L-Valine methyl ester hydrochloride is used in peptide synthesis workflows where a protected, chiral amino acid ester is required for N-terminus compatibility and reliable coupling. The N-α-benzyl group protects the amino functionality from side reactions during activation of the carboxylate equivalent, while the methyl ester can be converted to an acid or activated derivative as part of peptide coupling chemistry. The L-valine stereochemistry is preserved through the sequence, supporting stereodefined incorporation into peptide chains and downstream SAR studies. The resulting peptide intermediates and protected fragments can be assembled into longer sequences using standard peptide coupling strategies, aligning with research and fine chemical synthesis needs.
2. Protected Amino Acid Chemistry
N-α-Benzyl-L-Valine methyl ester hydrochloride serves as a protected amino acid intermediate for derivatization strategies that require orthogonal functional group control. The benzyl-protected amine and methyl ester provide two distinct handles for sequential transformations, enabling controlled deprotection to reveal a free amine for further coupling or for conversion into alternative protecting-group patterns. Ester hydrolysis can generate a carboxylic acid for C-terminal modification, while the hydrochloride salt form helps maintain the amine in a defined protonation state during handling and intermediate preparation. The compound's chiral center and hydrophobic valine side chain make it suitable for constructing stereochemically defined amino acid derivatives used in synthetic methodology development and peptide building block preparation.
3. Chiral Building Block Development
N-α-Benzyl-L-Valine methyl ester hydrochloride functions as a chiral amino acid intermediate for stereoselective synthesis of valine-containing scaffolds and peptidomimetic fragments. The preserved L-configuration at the α-carbon provides a stereochemical bias that can be carried into amide-forming steps, including conversion of the methyl ester into activated carboxyl derivatives for fragment coupling. The N-α-benzyl protection supports selective transformations at the carboxylate side while preventing premature amine participation, supporting route design for multi-step chiral synthesis. Downstream derivatives can include N-deprotected amino acid forms for sequential assembly, as well as ester-to-amide or ester-to-acid conversions that enable incorporation into larger molecular architectures for chemical biology and medicinal chemistry research.
4. Pharmaceutical Intermediate Preparation
N-α-Benzyl-L-Valine methyl ester hydrochloride is applicable to pharmaceutical intermediate preparation where controlled protection of the amino group and defined ester functionality are required in process-oriented synthesis. The benzyl-protected amine can be managed to reduce unwanted side reactions during manufacturing-scale coupling steps, while the methyl ester provides a manipulable C-terminal equivalent that can be converted into carboxylic acid or activated intermediates. The hydrochloride salt form can improve reproducibility in handling and intermediate isolation for chiral building blocks used in drug-like molecule construction. The compound can be incorporated into peptide-like fragments, valine-based linkers, or protected amino acid sequences that feed into downstream fine chemical manufacturing and process chemistry routes.
5. Peptidomimetics And SAR Studies
N-α-Benzyl-L-Valine methyl ester hydrochloride is suitable for peptidomimetic construction and structure-activity relationship studies that depend on stereodefined valine residues. The branched isopropyl side chain contributes hydrophobic character that can influence binding mode and conformational preferences in peptide analogs, while the protected amine and ester enable systematic modification of termini during analog generation. Benzyl deprotection can furnish a free N-terminus for iterative coupling, and ester conversion supports generation of amide-linked analogs or terminal functional groups for library synthesis. The resulting valine-containing intermediates can be used to build stereochemically consistent series of analogs for SAR evaluation and chemical biology investigations.
6. Analytical Research Standards
N-α-Benzyl-L-Valine methyl ester hydrochloride can be employed as a reference material and analytical intermediate for method development in amino acid derivative analysis. The defined stereochemistry, benzyl-protected N-terminus, and methyl ester functionality create a distinct chemical signature useful for monitoring protected amino acid synthesis, deprotection progress, and ester-to-acid or ester-to-amide transformations. The hydrochloride salt form supports reproducible sample preparation for chromatographic and spectrometric characterization of protected amino acid intermediates. Incorporation into analytical workflows helps ensure structural verification of valine-based building blocks used across peptide synthesis, chiral intermediate manufacturing, and biochemical research intermediate preparation.
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