H-D-Asn(Mtt)-OH

H-D-Asn(Mtt)-OH is a protected asparagine derivative in which the side-chain amide of L-asparagine is maintained while the amino group is rendered as an N-protected residue bearing a 4-methyltrityl (Mtt) group. The molecule contains a free carboxylic acid (C-terminal functionality) paired with a chiral center at the alpha position, and the N-Mtt protection introduces a bulky, acid-labile protecting-group environment that modulates nucleophilicity and peptide-coupling behavior. The Mtt group is designed to withstand many coupling conditions yet can be removed under controlled deprotection strategies, enabling access to the asparagine amino functionality for subsequent transformations. The combination of an amino-acid backbone, a protected nitrogen, and an intact side-chain amide makes H-D-Asn(Mtt)-OH suitable as a stereodefined building block and intermediate for peptide synthesis and downstream derivatization workflows.

1. Peptide Synthesis

H-D-Asn(Mtt)-OH is applied in peptide building-block preparation where orthogonal protection and stereochemical control are required for amide bond formation. The protected amino functionality (N-Mtt) and the free carboxylic acid support standard peptide coupling chemistry while limiting side reactions from the nitrogen during chain assembly. The D-configuration at the alpha carbon enables incorporation of stereochemically defined asparagine analogs into peptides and can be used to probe backbone stereochemical effects, improve stability against proteolysis, or tune conformational preferences. The side-chain carboxamide remains available for hydrogen-bonding interactions in the assembled peptide, supporting realistic structure-function studies and peptidomimetic construction. H-D-Asn(Mtt)-OH thus functions as a protected amino acid intermediate compatible with iterative peptide synthesis and subsequent deprotection steps.

2. Unnatural Amino Acid Incorporation

H-D-Asn(Mtt)-OH is used for unnatural amino acid incorporation in chemical biology and peptide engineering programs that require D-amino acid stereocenters. The D-asparagine backbone provides a chiral inversion relative to the natural L configuration, while the N-Mtt protecting group helps manage reactivity during coupling and limits undesired cross-linking or oligomerization. The retained side-chain amide can participate in specific intermolecular recognition motifs, allowing researchers to design peptide analogs with altered hydrogen-bonding patterns and backbone dynamics. Controlled deprotection of the Mtt group can expose the protected nitrogen for further functionalization or for generating peptide fragments that match downstream synthesis requirements. H-D-Asn(Mtt)-OH therefore serves as a stereodefined chiral amino acid intermediate for constructing D-amino-acid-containing molecular scaffolds.

3. Side-Chain Functionalization

H-D-Asn(Mtt)-OH is relevant to side-chain functionalization strategies where the asparagine side-chain amide and the protected alpha-amino group can be leveraged for sequential derivatization. The side-chain carboxamide can be transformed into alternative functional handles through established chemistries, while the N-Mtt group provides a temporary protection layer that can be removed to enable selective downstream modifications. The presence of a free carboxylic acid enables conversion into activated derivatives for fragment coupling, including preparation of peptide segments or conjugation-ready intermediates. The stereogenic D-center can be maintained through these transformations, supporting stereospecific synthesis of functionalized amino acid derivatives and peptide analogs. H-D-Asn(Mtt)-OH thus supports amino acid derivatization workflows that connect protected amino acid chemistry with functional group installation on peptide-relevant scaffolds.

4. SAR Studies And Molecular Design

H-D-Asn(Mtt)-OH is applied in structure-activity relationship (SAR) studies and molecular design workflows that require controlled incorporation of D-asparagine residues into peptide-like candidates. The N-Mtt protection provides a predictable protection/deprotection handle, enabling consistent peptide coupling and fragment assembly across a series of analogs. The free carboxylic acid and side-chain amide together create a defined hydrogen-bonding and polarity profile that can be used to modulate binding interactions in SAR libraries. The D stereochemistry at the alpha carbon allows systematic exploration of stereochemical effects on conformation, stability, and intermolecular recognition without changing the side-chain identity. H-D-Asn(Mtt)-OH therefore functions as a chiral, protected amino acid building block for generating stereochemically defined analog panels used in medicinal chemistry and peptidomimetic design.

5. Pharmaceutical Manufacturing Intermediates

H-D-Asn(Mtt)-OH is suitable for pharmaceutical intermediate preparation where protected amino acid building blocks are manufactured and used in controlled peptide synthesis supply chains. The Mtt-protected nitrogen and free carboxylic acid allow it to be handled as a defined, isolable chiral intermediate with functional-group compatibility for coupling steps in peptide manufacturing. The orthogonal nature of the N-protection strategy supports downstream deprotection and conversion into peptide fragments under manufacturing-relevant conditions, helping standardize synthetic sequences. The D-asparagine stereochemistry can be incorporated into manufacturing routes for D-amino-acid-containing peptides and peptide analogs used as research and development materials. H-D-Asn(Mtt)-OH thus aligns with industrial chemical manufacturing needs for stereodefined, protected amino acid intermediates that support scalable peptide construction and subsequent processing.

1. Odorant binding protein based biomimetic sensors for detection of alcohols associated with Salmonella contamination in packaged beef

2. Effect of Short-Term Desiccation, Recovery Time, and CAPA-PVK Neuropeptide on the Immune System of the Burying Beetle Nicrophorus vespilloides

3. Application of human liver organoids as a patient-derived primary model for HBV infection and related hepatocellular carcinoma

4. GLP-1, exendin-4 and C-peptide regulate pancreatic islet microcirculation, insulin secretion and glucose tolerance in rats

5. Myotropic activity and immunolocalization of selected neuropeptides of the burying beetle Nicrophorus vespilloides (Coleoptera: Silphidae)