L-4-Hydroxyphenylglycine is a naturally occurring aromatic amino acid featuring a glycine backbone substituted with a para-hydroxylated phenyl ring, classifying it as a hydroxyphenylglycine derivative within the amino acid family used for peptide-related studies. The molecule contains a free amino group and a free carboxyl group along with a phenolic hydroxyl side chain that can participate in hydrogen bonding and can undergo typical phenol-related derivatization while the stereocenter is specified as the L-form by the product name. L-4-Hydroxyphenylglycine is employed as a building block in peptide synthesis and as a substrate component for structure-activity and binding studies where an aromatic side chain bearing a hydroxyl group is required for chemical recognition or for analytical method development.
CAT No: CP09803
L-4-Hydroxyphenylglycine is an L-configured amino acid featuring a benzyl-like side chain bearing a para-hydroxyl group, together with the primary amino and carboxylic acid functionality typical of amino acid building blocks. The aromatic phenolic moiety enables hydrogen-bonding and electrophile/oxidation-sensitive chemistry, while the amino and carboxyl groups support peptide coupling and salt formation. The chiral center at the α-position provides stereochemical control for incorporation into peptides and for downstream synthesis of chiral intermediates. In protected or activated forms, L-4-hydroxyphenylglycine functions as a chemically addressable intermediate for constructing phenol-containing peptide segments, peptidomimetics, and aromatic side-chain derivatives.
1. Peptide Synthesis
L-4-Hydroxyphenylglycine is used in peptide synthesis workflows to introduce a para-hydroxyphenylglycine residue as a defined aromatic side chain within linear peptides and peptide fragments. The amino acid backbone supports standard peptide coupling after N-protection and carboxyl activation, while the phenolic hydroxyl can be protected as an ether or silyl group to prevent side reactions during amide bond formation. Stereochemical integrity of the L-α-center is maintained through mild coupling and appropriate protecting-group strategies, enabling stereochemically consistent peptide building block preparation. Incorporation of the phenolic side chain supports subsequent functional transformations such as selective deprotection, oxidation, or conjugation-compatible derivatization for downstream peptide analog generation.
2. Amino Acid Derivatization
L-4-Hydroxyphenylglycine is applied in amino acid derivatization chemistry where the phenolic hydroxyl serves as a handle for controlled functional group interconversion. The aromatic hydroxyl can be converted into protected phenol derivatives, activated aryl ethers, or leaving-group-bearing intermediates, while the amino acid functionality can be masked to direct chemoselective modifications at the side chain. The presence of both an α-amino group and a carboxyl group allows formation of salts, esters, amides, and activated intermediates that can be carried through multi-step synthetic sequences. Resulting derivatives are suitable for constructing structure-defined aromatic amino acid analogs used in synthetic organic chemistry and biochemical research intermediate preparation.
3. Chemical Biology Probes
L-4-Hydroxyphenylglycine is relevant to chemical biology and molecular recognition studies requiring aromatic, hydrogen-bonding-capable side chains for probe and ligand construction. The para-hydroxyl group can participate in specific noncovalent interactions and can be engineered into conjugation-ready motifs after protection/deprotection cycles. The amino acid scaffold can be incorporated into peptide-based probes or used as a chiral fragment for building receptor-binding or enzyme-interacting motifs, with the L-configuration supporting consistent stereochemical presentation. Downstream derivatization can enable attachment of reporter groups, affinity handles, or crosslinkable functionalities while preserving the phenolic recognition element.
4. Peptidomimetics And SAR
L-4-Hydroxyphenylglycine is utilized in peptidomimetic and SAR-oriented synthesis to generate aromatic side-chain-containing analogs that probe the role of phenolic hydrogen bonding and aromatic geometry in binding. The glycine-like backbone and the para-hydroxyphenyl substitution pattern support incorporation into constrained scaffolds or into backbone-modified analogs where the phenol remains chemically addressable. Protecting-group strategies for the phenolic hydroxyl and the amino/carboxyl groups enable sequential assembly of analog series and late-stage diversification. Resulting compounds can serve as structure-activity relationship study materials and as defined chiral intermediates for iterative medicinal chemistry and fragment-based optimization.
5. Pharmaceutical Intermediate Preparation
L-4-Hydroxyphenylglycine is employed as a chiral amino acid intermediate in pharmaceutical manufacturing supply chains for generating phenolic aromatic building blocks and peptide-like fragments used in process development. The α-amino and carboxy functionalities support conversion to N-protected amino acid derivatives, activated esters, and coupling-ready forms that integrate into larger synthetic routes. The phenolic hydroxyl can be managed through robust protection strategies to ensure compatibility with peptide coupling conditions and subsequent deprotection under controlled conditions. Downstream, the compound's stereochemical fidelity and functional-group pattern enable preparation of intermediates for fine chemical synthesis, including aromatic peptidomimetic fragments and phenol-bearing chiral compounds used in industrial-scale batch manufacturing.
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