Fmoc-D-Dap(2-Cl-Z)-OH

Fmoc-D-Dap(2-Cl-Z)-OH is an Fmoc-protected, D-configured amino acid derivative featuring the α-amino and α-carboxyl framework of diaminopropionic acid (Dap) with a side-chain bearing a protected amino group. The side-chain functionality is masked as a 2-chloro-benzyloxycarbonyl (2-Cl-Z) carbamate, introducing a benzylic protecting group that can participate in orthogonal deprotection schemes relative to the Fmoc group. The molecule combines an aromatic Fmoc chromophore with a second aromatic carbamate motif, enabling UV-active handling and analytical traceability during protected amino acid synthesis. The stereochemically defined D center and the protected side-chain amine support controlled peptide coupling and downstream conversion to free diamino functionality for peptide science, medicinal chemistry, and synthetic intermediate preparation.

1. Peptide Synthesis

Fmoc-D-Dap(2-Cl-Z)-OH is used in peptide building and solid-phase peptide synthesis workflows where the Fmoc group enables stepwise N-terminal protection and coupling. The protected side-chain amine as the 2-Cl-Z carbamate provides a stable handle that can remain inert during standard peptide assembly conditions, while the D stereochemistry helps define the chiral residue geometry in the growing chain. The α-amino protection and carboxyl functionality support routine amide bond formation strategies, and the orthogonal protecting-group pattern supports selective unveiling of the side-chain for later functionalization. Resulting peptide products can incorporate Dap-derived diamino motifs for charge modulation, receptor-binding studies, and peptidomimetic scaffold construction, while maintaining compatibility with protected amino acid chemistry.

2. Peptidomimetics And SAR

Fmoc-D-Dap(2-Cl-Z)-OH is applied in structure-activity relationship studies and peptidomimetic design where a protected diamino side chain is required to tune basicity and hydrogen-bonding patterns. The Dap side chain, once deprotected from the 2-Cl-Z carbamate, can generate a defined cationic functionality that influences molecular recognition in fragment-based molecular design and SAR campaigns. The Fmoc-protected amino acid format facilitates incorporation into analog libraries using standardized peptide coupling chemistry, while the stereochemical configuration provides consistent spatial orientation of the diamino group. Downstream deprotection and derivatization can yield free diamino residues for cyclization, salt-bridge engineering, or conjugation handles, supporting systematic exploration of structure-function relationships in applied medicinal chemistry.

3. Chemical Biology Labeling

Fmoc-D-Dap(2-Cl-Z)-OH supports chemical biology workflows that require protected amino acid incorporation followed by controlled unveiling of reactive amines for labeling chemistry. The protected side-chain carbamate masks the diamino functionality during synthesis, reducing undesired side reactions while enabling incorporation into peptides or protein-reactive constructs. The Fmoc group enables purification-friendly handling during assembly, and subsequent deprotection can provide a primary amine suitable for amide formation, carbamate exchange, or coupling to electrophilic probes. The resulting labeled biomolecules can be used to probe binding interfaces, map interaction networks, or generate affinity reagents, leveraging the defined D stereochemistry and diamino charge distribution for reproducible conjugation.

4. Protected Amino Acid Intermediate

Fmoc-D-Dap(2-Cl-Z)-OH serves as a chiral, protected amino acid intermediate for manufacturing routes that rely on orthogonal protection strategies and predictable functional group timing. The presence of two protected sites, Fmoc on the α-amino group and 2-Cl-Z on the side-chain amine, enables sequential deprotection logic that can be integrated into fine chemical synthesis planning. The aromatic carbamate protecting group and the chlorinated benzylic motif can be leveraged for downstream transformations where controlled conversion of protected amines to free diamino species is required. Industrially relevant use includes preparing protected building blocks for peptide-derived intermediates, enabling scalable synthesis of diamino-containing fragments and supporting downstream generation of functionalized amino acid derivatives for specialty chemical production.

5. Pharmaceutical Manufacturing Intermediates

Fmoc-D-Dap(2-Cl-Z)-OH can be employed in pharmaceutical intermediate preparation where protected amino acid derivatives are manufactured for incorporation into peptide-like active ingredients or process intermediates. The Fmoc-protected form aligns with common peptide manufacturing practices that use orthogonal protection to manage reactive amines during controlled assembly and purification steps. The D-configured stereocenter and the 2-Cl-Z side-chain protection help manage chemoselectivity, supporting consistent formation of defined diamino-containing structures in downstream synthetic sequences. The resulting intermediates can feed into peptidomimetic production, linker installation, or late-stage functionalization strategies that require reliable protected amino acid chemistry compatible with industrial scale fine chemical synthesis.

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