H-D-Glu(AMC)-OH

H-D-Glu(AMC)-OH is a deuterated glutamic acid derivative bearing an AMC (7-amino-4-methylcoumarin) reporter on the side chain, presented as the free carboxylic acid at the α-position and with an N-terminal amino group protected as H (deuterated at the N-acidic position as indicated by H-). The molecule retains the glutamate stereochemical framework, including a chiral center at the α-carbon and a side-chain carboxylate that is conjugated to the AMC fluorophore, creating a compact amino acid-coumarin conjugate suitable for peptide and enzyme chemistry. The AMC moiety provides a chromophore/fluorophore that can participate in enzymatic cleavage readouts, while the glutamate functional groups support coupling reactions and downstream derivatization through carboxyl activation. The deuterium label can be used to control or track reaction pathways, support mass spectrometric discrimination, and improve interpretability in mechanistic and analytical studies of amino acid-based substrates.

1. Enzyme Assay Substrates

H-D-Glu(AMC)-OH is applied in biochemical research as an amino acid-coumarin substrate for monitoring protease, peptidase, or amidase activity via fluorescence or absorbance changes associated with AMC release. The glutamate backbone provides the recognition element, while the AMC reporter acts as a measurable tag that can be liberated or unmasked upon enzymatic processing. The presence of a free α-carboxylic acid and the side-chain AMC conjugation enable incorporation into substrate analog series and allow controlled structure-function comparisons across glutamate-directed enzyme systems. Deuterium labeling supports mechanistic studies and mass spectrometric confirmation of substrate integrity and cleavage products, linking amino acid chemistry to quantitative assay workflows.

2. Peptide Coupling Building Block

H-D-Glu(AMC)-OH is suitable for peptide synthesis workflows where glutamate-derived residues bearing a fluorescent reporter are required for N- or side-chain functional readouts. The amino acid functionality supports standard peptide coupling strategies after appropriate activation of the carboxyl group, while the AMC substituent remains chemically stable under typical peptide assembly conditions designed to preserve coumarin fluorescence. The stereodefined glutamate scaffold can be used to construct peptide building blocks that maintain stereochemical fidelity in glutamatergic motifs and in peptidomimetic analogs. Downstream peptide conjugates generated from this residue can serve as analytical probes, enabling structure-activity relationship studies and mechanistic mapping of proteolysis or binding events.

3. Analytical Mass Spectrometry Standards

H-D-Glu(AMC)-OH is utilized in analytical research and method development as a deuterated amino acid-AMC reference for LC-MS/MS quantification and fragmentation behavior studies. The AMC reporter provides a strong, characteristic signal that can be tracked alongside the glutamate-derived backbone, while deuterium enables discrimination from non-labeled analogs in isotope-dilution or comparative experiments. The free carboxylic acid and conjugated reporter structure support consistent extraction and chromatographic behavior across related amino acid derivatives. The resulting analytical standard utility extends to verifying derivatization efficiency, monitoring stability during sample handling, and confirming identity of peptide hydrolysis products that contain AMC-tagged glutamate units.

4. Side-Chain Functionalization Chemistry

H-D-Glu(AMC)-OH supports synthetic organic chemistry routes focused on side-chain functionalization of glutamate frameworks for fluorescent tagging and downstream conjugation. The glutamate side-chain carboxylate embedded in the AMC conjugate can be leveraged as a handle for further derivatization strategies, such as conversion to activated esters or incorporation into larger amino acid derivative architectures. The AMC moiety provides a built-in reporter that can be retained through multi-step synthesis and then used to track intermediates or final products in complex reaction sequences. Deuterium labeling can further assist in studying chemoselectivity and in tracing the fate of the amino acid residue during manufacturing-relevant transformations of amino acid intermediates.

5. Pharmaceutical Intermediate Preparation

H-D-Glu(AMC)-OH can be employed in pharmaceutical intermediate preparation as a labeled amino acid derivative for building peptide-like reagents used in biochemical screening and process analytics. The defined glutamate stereochemistry and the presence of a reporter-bearing side chain align with the synthesis of substrate analogs, reference materials, and assay-compatible intermediates used during lead optimization and formulation-adjacent testing. The coumarin reporter facilitates monitoring of intermediate formation and purification by providing spectroscopic detectability, while the free carboxylic acid enables conversion into activated derivatives for controlled coupling steps. Deuterium labeling supports robust analytical traceability across intermediate lots, aligning amino acid derivatization chemistry with industrially oriented documentation and characterization needs.

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