Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide is a Boc-protected thionoserine derivative presented as a benzotriazolide-activated acyl transfer reagent, combining a chiral amino acid backbone with a benzotriazole leaving group and a benzyl-protected side-chain thioether. The molecule contains a tert-butoxycarbonyl (Boc) group on the amino functionality, a benzyl-protected sulfur substituent that modulates nucleophilicity and stability during peptide coupling, and an aromatic nitro-substituted benzotriazole system that supports efficient acyl transfer under peptide-synthesis-compatible conditions. The stereogenic center inherent to the thionoserine scaffold enables stereochemically defined incorporation into peptide sequences or peptide-like linkages, while the activated ester character of the benzotriazolide supports controlled downstream transformations. The nitrobenzotriazolide motif and Boc protection strategy together make the compound a chiral intermediate tailored for protected amino acid synthesis, peptide building block preparation, and subsequent functional group unveiling for synthetic elaboration.

1. Peptide Coupling Reagents

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide supports peptide synthesis workflows by functioning as a benzotriazolide-activated amino acid derivative that can participate in acyl transfer to form amide bonds with incoming nucleophiles. The Boc-protected amino group and the benzyl-protected sulfur substituent help preserve side-chain integrity during coupling, while the chiral thionoserine core provides stereochemical definition at the amino acid center. The 6-nitrobenzotriazole leaving group framework can be used to drive formation of peptide bonds under standard protected amino acid strategies, enabling assembly of thioether-containing peptide segments and peptide analogs. Downstream deprotection and side-chain unmasking can then yield functional thio-based motifs for further derivatization, making the compound relevant to peptide building block preparation and protected amino acid synthesis.

2. Side-Chain Functionalization

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide is suitable for side-chain functionalization programs where thionoserine-derived sulfur chemistry is required after peptide or fragment construction. The benzyl-protected thioether acts as a protecting-group handle that can be retained through peptide coupling and later removed to enable access to sulfur-centered reactivity for subsequent transformations. The nitro-substituted benzotriazolide activation supports incorporation of the thionoserine unit into larger scaffolds without premature exposure of the sulfur functionality. Resulting thioether-unmasked derivatives can be employed to generate sulfide-linked probes, thioether-to-sulfoxide/sulfone analogs, or sulfur-containing peptidomimetic motifs, aligning with amino acid derivatization and peptide science intermediate preparation.

3. Peptidomimetics And SAR Studies

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide can be applied in peptidomimetic construction and SAR studies where controlled incorporation of a chiral thionoserine residue is needed to tune backbone recognition and side-chain properties. The Boc-protected amino functionality and benzyl-protected thioether enable systematic generation of analog libraries with defined stereochemistry and protected-group compatibility. The benzotriazolide activation supports efficient assembly of peptide-like linkages, facilitating rapid synthesis of structure-defined fragments for molecular design and SAR screening campaigns. Nitrobenzotriazole activation chemistry also aligns with synthetic routes that require predictable coupling behavior, supporting downstream formation of analogs for biochemical research intermediate use and structure-function exploration.

4. Chemical Biology Labeling

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide supports chemical biology workflows that require incorporation of a thionoserine-derived residue into labeling constructs or affinity reagents. The protected amino acid architecture allows sequential assembly of peptide conjugates while maintaining side-chain protection through the coupling stage, and the chiral center helps preserve stereochemical fidelity in recognition elements. Benzyl-protected sulfur can serve as a controlled handle for later conjugation steps, enabling conversion to reactive sulfur-containing motifs suitable for probe attachment strategies. The resulting thioether-bearing peptide or peptide-like intermediates can be used to generate biomolecule-modifying reagents and analytical standards, connecting amino acid chemistry with downstream chemical biology reagent synthesis.

5. Pharmaceutical Intermediate Preparation

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide is applicable to pharmaceutical intermediate preparation where protected amino acid derivatives are required for controlled synthesis of peptide-based or peptide-derived intermediates. The Boc group provides an orthogonal protection element for amino functionality during coupling and allows later deprotection to enable further chain extension or functionalization, while the benzyl-protected sulfur helps manage side-chain stability under manufacturing-relevant synthetic conditions. The benzotriazolide activation enables formation of amide linkages under protected amino acid synthesis paradigms, supporting scalable route design for chiral building block incorporation. Nitrobenzotriazole activation chemistry and the defined stereocenter make the compound suitable for producing well-characterized intermediates that can feed downstream fine chemical synthesis and specialty chemical production of peptide-like structures.

6. Process Chemistry Intermediate

Boc-Thionoser(Bzl)-1-(6-nitro)benzotriazolide can be employed in process chemistry intermediate development for manufacturing routes that require reliable acyl transfer from a pre-activated amino acid derivative. The combination of Boc protection and benzyl-protected thioether reduces undesired side reactions during coupling operations, while the benzotriazolide leaving group supports consistent peptide bond formation behavior in synthetic sequences. The nitro-substituted benzotriazole framework provides a chemically distinct activation mode that integrates into protected amino acid synthesis strategies and can be aligned with downstream deprotection and purification planning. Resulting thionoserine-containing intermediates can be carried forward into larger-scale peptide building block preparation, enabling industrial chemical manufacturing workflows that depend on stereodefined amino acid incorporation and controlled functional group unmasking.

1. An Isolated TCR αβ Restricted by HLA-A* 02: 01/CT37 Peptide Redirecting CD8+ T Cells to Kill and Secrete IFN-γ in Response to Lung Adenocarcinoma Cell Lines

2. An interdomain binding site on HIV-1 Nef interacts with PACS-1 and PACS-2 on endosomes to down-regulate MHC-I

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

4. Immune responses to homocitrulline-and citrulline-containing peptides in rheumatoid arthritis

5. Novel Peptide-Based PD1 Immunomodulators Demonstrate Efficacy in Infectious Disease Vaccines and Therapeutics