(R)-α-Methyl-2-bromophenylalanine·H2O is a halogenated, non-proteinogenic amino acid derivative featuring an α-methyl substituent and a 2-bromophenyl side chain, with the (R) stereochemical configuration specified at the α-carbon and a free amino acid backbone bearing an amino group and a carboxyl group. The molecule includes a bromine atom on the aromatic ring that provides distinct electronic and steric characteristics for selective chemical transformations, while the "·H2O" indicates the presence of associated water consistent with a hydrate form rather than a protected or esterified amino acid. In peptide and amino acid chemistry, this scaffold is used as a substrate or building block for preparing modified peptides and for structure-activity or labeling studies where the α-methyl group and ortho-bromine handle enable downstream derivatization and conformational effects.
(R)-α-Methyl-2-bromophenylalanine·H2O is a chiral, non-proteinogenic amino acid building block featuring an α-methyl stereocenter and a 2-bromophenyl side chain, supplied as a hydrate salt form. Its aryl bromide provides a synthetically useful handle for cross-coupling and late-stage functionalization, while the α-methyl substitution supports conformational and steric differentiation in peptide and peptidomimetic frameworks. Researchers use this compound as a stereochemically defined intermediate to access substituted aromatic amino acid derivatives and to introduce controlled steric character into non-natural peptide analogs.
1. Peptidomimetic Building Block
(R)-α-Methyl-2-bromophenylalanine·H2O is used in the synthesis of non-natural peptide analogs and peptidomimetics where a sterically biased α-methyl group and a substituted aromatic side chain are required to tune conformation and structure. Medicinal chemistry groups and custom peptide manufacturers incorporate this chiral amino acid building block into research-grade peptide series to generate analogs for structure-activity relationship studies, particularly when downstream diversification of the aryl bromide is part of the design workflow. The hydrate form is commonly selected for reliable handling in intermediate preparation and subsequent conversion into peptide-coupling-ready derivatives.
2. Medicinal Chemistry Diversification
(R)-α-Methyl-2-bromophenylalanine·H2O serves as a practical starting material for medicinal chemistry programs that rely on aryl bromide chemistry for diversification. Organic synthesis teams use the 2-bromophenyl moiety as a coupling handle to rapidly access a range of substituted phenyl analogs through standard cross-coupling strategies, enabling parallel synthesis of analog libraries around a fixed chiral amino acid core. This approach is especially useful when the α-methyl stereocenter must be preserved to maintain stereochemical integrity across iterative intermediate-to-analog conversions.
3. Pharmaceutical Intermediate Development
(R)-α-Methyl-2-bromophenylalanine·H2O is commonly positioned as a chiral intermediate for the preparation of substituted aromatic amino acid derivatives used in downstream process development. Pharmaceutical intermediate developers and specialty chemical manufacturers value the defined (R) configuration and the presence of a reactive aryl bromide functional group for constructing more complex scaffolds in a modular manner. The compound's amino acid functionality supports its conversion into a variety of derivative forms required for intermediate sequencing, while the aromatic bromide enables branching into multiple substituted targets without re-establishing the stereocenter.
4. Chiral Synthesis Reference Material
(R)-α-Methyl-2-bromophenylalanine·H2O is also used as a stereochemically defined chiral reference building block in synthetic method development and analytical workflow support for non-natural amino acid derivatives. Research laboratories employ it when validating stereochemical outcomes across derivative formation steps that retain the (R) configuration and when comparing products generated from different chiral starting materials. The combination of a stable chiral α-methyl center and an aryl bromide handle makes it a convenient anchor compound for characterizing substitution patterns and confirming structural integrity during intermediate screening.
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