L-erythro-4-hydroxyglutamic acid is a naturally occurring, proteinogenic amino acid derivative classified as a hydroxy-substituted glutamic acid, featuring a five-carbon backbone with a side-chain hydroxyl at the 4-position and a stereodefined erythro relationship between the relevant substituents. The molecule contains a free amino group and a free carboxyl group on the α-carbon framework, while the side-chain hydroxyl provides an additional hydrogen-bonding and polarity site that can participate in chemical derivatization and coordination interactions. In research and peptide-related synthesis, it is used as a chemically defined building block for incorporating hydroxy-functional glutamate analogues into peptide structures and for preparing labeled or structurally modified amino acid derivatives used in structure-activity studies and analytical method development.
CAT No: CP06902
L-erythro-4-hydroxyglutamic acid is an L-configured amino acid derivative featuring a chiral 4-hydroxy substituent on the glutamate side chain, alongside a free or derivatizable α-amino and α-carboxyl functionality depending on the salt or protected form. The molecule contains a primary carboxylic acid and a secondary alcohol, enabling hydrogen-bonding interactions and providing orthogonal handles for selective protection, activation, and subsequent functionalization. The stereochemical relationship between the α-center and the erythro-configured hydroxy-bearing carbon supports stereodefined synthetic routes to hydroxylated glutamate analogs used in peptide and biochemical chemistry. The presence of both an alcohol and a carboxyl group supports conversion into activated intermediates, ester or amide derivatives, and downstream scaffolds such as protected amino acid building blocks for coupling chemistry.
1. Peptide Synthesis
L-erythro-4-hydroxyglutamic acid serves as a hydroxylated glutamate residue for peptide building block preparation in peptide synthesis workflows. The amino acid backbone supports N-protection strategies and C-terminal activation to enable amide bond formation with standard peptide coupling reagents, while the side-chain alcohol can be protected with suitable groups to control chemoselectivity during chain assembly. Stereodefined erythro hydroxyl placement can be preserved through orthogonal protection and deprotection sequences, allowing construction of peptides and peptide fragments containing a defined hydroxyglutamate motif. Resulting hydroxylated peptide analogs can be used for mapping recognition elements, studying conformational effects of side-chain hydrogen-bond donors, and generating scaffold libraries for structure-activity relationship studies.
2. Amino Acid Derivatization
L-erythro-4-hydroxyglutamic acid is well matched to amino acid derivatization programs that convert the side-chain alcohol into functional handles while retaining the glutamate framework. The secondary hydroxyl can be transformed into ethers, esters, or leaving-group-bearing derivatives, enabling controlled introduction of additional polarity, steric features, or reactive groups for subsequent conjugation steps. The carboxyl group can be activated or esterified to support formation of amides, mixed anhydrides, or other coupling-ready intermediates, supporting downstream synthetic utility in fine chemical synthesis. Hydroxyglutamate-derived intermediates can be applied to generate stereodefined analogs for biochemical probes, enzyme substrate studies, and intermediate preparation toward more complex amino acid-derived scaffolds.
3. Chemical Biology Probes
L-erythro-4-hydroxyglutamic acid can be employed in chemical biology research as a stereodefined amino acid motif for probing protein recognition and catalytic site interactions. The combination of an L-glutamate backbone and a side-chain hydroxyl supports hydrogen-bonding patterns that may mimic or perturb native ligand contacts, enabling targeted design of biochemical research intermediates. Side-chain functionalization can be used to introduce affinity tags, clickable groups, or reporter-compatible substituents while the backbone remains suitable for incorporation into peptide-like ligands. L-erythro-4-hydroxyglutamic acid-derived conjugation partners can support biomolecule modification strategies for mapping binding determinants and generating molecular tools for mechanistic studies.
4. Enzyme Studies
L-erythro-4-hydroxyglutamic acid is suitable for enzyme substrate and inhibitor design efforts where hydroxylated glutamate chemistry influences binding and turnover. The stereochemically defined hydroxy-bearing side chain provides a functional group that can participate in enzyme active-site hydrogen bonding and can be tuned through protection-state control to match the enzyme's requirements during assay-relevant synthesis. The α-amino and carboxyl groups support conversion into peptide-like substrates, activated analogs, or constrained derivatives that can be incorporated into larger constructs for mechanistic evaluation. Hydroxyglutamate analogs prepared from this compound can serve as research intermediates for studying substrate specificity, catalytic tolerance to side-chain modifications, and structure-function relationships in amino acid-processing enzymes.
5. Pharmaceutical Intermediate Preparation
L-erythro-4-hydroxyglutamic acid can function as a chiral amino acid intermediate for pharmaceutical intermediate preparation in process chemistry and fine chemical manufacturing. The molecule's L-configuration and erythro hydroxyl stereocenter enable stereodefined routes to hydroxylated glutamate analogs that can be further elaborated into amide-containing fragments, cyclic derivatives, or side-chain-modified scaffolds. Protection-group strategies for the amino and hydroxyl functionalities can be designed to withstand peptide coupling conditions and later deprotection steps, supporting scalable intermediate synthesis. Downstream derivatives generated from this hydroxyglutamate core can feed into medicinal chemistry programs requiring stereochemically controlled amino acid chemistry and reliable coupling-ready intermediates.
6. Polymer And Material Modification
L-erythro-4-hydroxyglutamic acid can be applied to functional material and polymer modification where amino acid-derived side chains introduce hydroxyl-rich functionality. The presence of a carboxyl group supports incorporation into polymer backbones or side chains via esterification or amide coupling to polymer-reactive groups, while the secondary alcohol enables further derivatization such as crosslinking or surface functional tuning. Stereodefined erythro hydroxyl placement can influence hydrogen-bonding density and interfacial interactions in polymer architectures. Hydroxyglutamate-based monomers or grafting intermediates derived from this compound can be used in specialty chemical production to generate materials with tailored polarity and reactive-site density for downstream functionalization.
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