H-D-beta-HSer-OH

H-D-beta-HSer-OH is a deuterium-labeled serine derivative in which the amino acid backbone corresponds to β-homologated serine architecture and the side chain bears a hydroxymethyl group, providing both an α-amino functionality and a primary alcohol for hydrogen-bonding and derivatization chemistry. The presence of a defined stereochemical relationship at the β-position and the incorporation of deuterium at the labeled site make the molecule suitable for isotopically tracked studies while retaining the polar, water-compatible profile typical of serine-based building blocks. The free carboxylic acid and free hydroxyl enable direct coupling chemistry or conversion into protected amino acid derivatives for peptide synthesis. The deuterium label can influence vibrational signatures and mass-based detection, supporting analytical method development and mechanistic studies in amino acid and peptide workflows.

1. Isotope Tracing Studies

H-D-beta-HSer-OH is applied in isotope-labeling research where deuterium incorporation supports mass spectrometric tracking of amino acid incorporation, peptide formation, and metabolic or chemical transformation pathways. The amino acid functional set, including the carboxylic acid and side-chain hydroxyl, can be converted into peptide-compatible protected forms so that labeled material can be incorporated into larger biomolecule constructs without losing the label at the targeted position. The β-position labeling and serine-like side chain can be leveraged to correlate label retention with specific bond-forming or bond-breaking events during synthesis or downstream processing. The resulting labeled derivatives can serve as analytical standards for LC-MS/MS quantitation and for mechanistic interpretation of amino acid derivatization and peptide coupling reactions.

2. Peptide Coupling Building Block

H-D-beta-HSer-OH is suitable for peptide synthesis development where the amino acid backbone and serine side-chain hydroxyl participate in standard amide bond formation after appropriate protection and activation. The free hydroxyl can be orthogonally protected to control chemoselectivity during stepwise assembly, while the carboxylic acid can be used to generate activated intermediates or to form peptide bonds under coupling conditions compatible with amino acid chemistry. The β-homologated structural motif can support construction of peptide analogs with altered spacing and backbone topology, enabling studies of how chain length and side-chain positioning affect recognition or conformation. The deuterium label can be retained through protected amino acid synthesis and peptide coupling to enable label-aware characterization of assembled peptides and their fragments.

3. Side-Chain Hydroxyl Functionalization

H-D-beta-HSer-OH is used in chemical biology and synthetic organic chemistry for side-chain functionalization strategies that transform the serine hydroxymethyl group into handles for conjugation or further derivatization. The hydroxyl group can be protected, activated, or converted into leaving-group equivalents to enable controlled attachment of linkers, affinity tags, or reactive moieties while maintaining the amino acid stereochemical integrity. The carboxylic acid and amino group allow sequential derivatization into intermediates for downstream C-terminal or N-terminal modification, supporting modular synthesis of labeled amino acid derivatives and peptidomimetic fragments. Deuterium labeling can further support kinetic or mechanistic studies of functional group transformations by providing an additional spectroscopic or mass-based dimension to product characterization.

4. Analytical Standards And Method Development

H-D-beta-HSer-OH is applied in analytical research as an isotopically defined amino acid reference for validating chromatographic behavior, ionization response, and fragmentation patterns in LC-MS methods targeting serine-containing peptides or amino acid metabolites. The combination of a free carboxylic acid and hydroxyl group provides predictable polarity and retention characteristics, while the deuterium label yields distinguishable mass shifts that can reduce ambiguity in complex matrices. The β-labeled architecture can help distinguish isomeric or near-isobaric species during method development for amino acid derivatization workflows. The compound can be employed to calibrate isotope-resolved quantitation and to support interpretation of labeled peptide fragments generated during peptide coupling and deprotection sequences.

5. Fine Chemical Intermediate Preparation

H-D-beta-HSer-OH is suitable as a chiral, deuterium-labeled amino acid intermediate in process chemistry and specialty chemical production where protected amino acid derivatives are required for controlled manufacturing of labeled building blocks. The presence of both an amino functionality and a primary alcohol enables systematic protection-group selection to manage chemoselectivity, including conversion into N-protected forms and hydroxyl-protected variants that are compatible with peptide coupling and downstream deprotection. The free carboxylic acid can be transformed into ester or activated acid forms to support scalable route design for producing labeled peptide segments, peptidomimetic scaffolds, or conjugation-ready intermediates. Deuterium retention through protection, activation, and coupling steps supports downstream production of isotopically labeled products used in research-grade biochemical and analytical workflows.

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