N-α-Fmoc-N-δ-xanthyl-D-glutamine

N-α-Fmoc-N-δ-xanthyl-D-glutamine is an Fmoc-protected D-glutamine derivative in which the α-amino group is masked as an N-(9H-fluoren-9-ylmethoxycarbonyl) carbamate and the δ-side-chain amide is further protected as an xanthyl (xanthate-derived) group. The molecule retains the glutamine backbone stereochemistry at the D-configuration at the α-carbon, while presenting a masked side-chain nitrogen that can be selectively unveiled under appropriate deprotection conditions. The combination of a stable aromatic Fmoc group for temporary protection and a side-chain-protecting xanthyl group for chemoselective handling supports controlled peptide coupling and downstream functional group exposure. The presence of carbamate and xanthyl-derived functionalities also provides a defined reactivity profile for peptide synthesis workflows and for preparing glutamine-containing intermediates used in chemical biology and process-scale fine chemical manufacturing.

1. Peptide Synthesis

N-α-Fmoc-N-δ-xanthyl-D-glutamine serves as a protected glutamine building block for solid-phase peptide synthesis and related stepwise peptide assembly. The Fmoc carbamate protects the α-amino group during chain elongation, enabling standard peptide coupling chemistry at the N-terminus after Fmoc removal, while the xanthyl-protected δ-amide nitrogen remains masked to prevent side reactions during activation of the peptide backbone. The D-stereocenter in the glutamine α-position supports incorporation of D-amino acid motifs into peptides for conformational tuning, protease resistance studies, and stereochemically defined analog libraries. The resulting glutamine side-chain unmasking strategy supports generation of D-glutamine-containing peptide sequences and enables reliable downstream transformations of the side-chain amide functionality in peptide science.

2. Side-Chain Functionalization

N-α-Fmoc-N-δ-xanthyl-D-glutamine is suitable for amino acid derivatization routes that require controlled exposure of the glutamine side-chain amide after peptide or intermediate construction. The xanthyl-protected δ-amide nitrogen can be managed to maintain orthogonality relative to the Fmoc group, allowing selective deprotection and subsequent conversion into electrophilic or conjugation-ready derivatives through established amide-handling chemistry. The glutamine side-chain provides a chemically recognizable handle for generating peptidomimetic scaffolds, for installing linkers used in bioconjugation, or for enabling post-synthetic modifications that preserve the D-configuration at the backbone stereocenter. The protected amino acid framework therefore supports stereochemically consistent functionalized products used in chemical biology research and in manufacturing of defined peptide analog intermediates.

3. Chemical Biology Probes

N-α-Fmoc-N-δ-xanthyl-D-glutamine can be applied in chemical biology workflows that require incorporation of D-glutamine residues into peptide probes and molecular recognition elements. The protected α-amino group and masked δ-amide nitrogen facilitate synthesis of peptides with minimal side reactions, while the D-glutamine stereochemistry supports probing of stereospecific binding modes and substrate recognition patterns in enzyme or receptor systems. The glutamine side-chain amide serves as a hydrogen-bonding motif once deprotected, enabling formation of structured interactions in probe scaffolds and supporting SAR-style comparisons across stereoisomeric variants. The compound's compatibility with peptide construction strategies makes it useful for generating research-grade intermediates for probe libraries, labeling reagents, and stereodefined biochemical investigation materials.

4. Pharmaceutical Intermediate Preparation

N-α-Fmoc-N-δ-xanthyl-D-glutamine is relevant to pharmaceutical intermediate preparation where protected amino acid derivatives are required for controlled synthesis of D-amino acid-containing peptide fragments. The Fmoc carbamate provides a robust temporary protection strategy for the α-amino group during sequential coupling steps, while the xanthyl-protected side-chain amide supports chemoselective handling of glutamine functionality in multi-step manufacturing routes. The defined stereochemistry at the glutamine α-carbon helps ensure consistency in downstream peptide analogs used as process intermediates for active pharmaceutical ingredient (API) synthesis or for formulation-relevant peptide materials. The compound's protected-group architecture aligns with industrial fine chemical synthesis practices that prioritize orthogonality, predictable deprotection behavior, and reproducible intermediate generation.

5. Process Chemistry And Scale-Up

N-α-Fmoc-N-δ-xanthyl-D-glutamine can be employed in process chemistry development for producing protected D-glutamine building blocks and for integrating them into scalable peptide coupling operations. The stable Fmoc group supports batch manufacturing workflows that require controlled N-protection and predictable deprotection timing, while the xanthyl-protected δ-amide enables suppression of undesired side reactions during activation and coupling of peptide fragments. The glutamine backbone contains functional groups that participate in standard peptide synthesis logic, allowing route design that links protected amino acid synthesis to subsequent intermediate formation for larger peptide or peptidomimetic targets. The resulting process suitability supports production of stereochemically defined peptide intermediates used in specialty chemical production and industrial peptide manufacturing pipelines.

1. Urinary Metabolites Associated with Blood Pressure on a Low-or High-Sodium Die

2. Peptides as Active Ingredients: A Challenge for Cosmeceutical Industry

3. Store-operated Ca2+ entry sustains the fertilization Ca2+ signal in pig eggs

4. Investigating Potential Interactions Between Neurohypophyseal Peptides, their Drug Analogs, and Coagulation Factor VIII

5. Quantitative Analysis of Ligands Effects on Bioefficacy of Nanoemulsion encapsulating Depigmenting Active