Boc-L-Dap(Boc)-OH·DCHA

Boc-L-Dap(Boc)-OH·DCHA is a protected L-2,3-diaminopropanoic acid derivative in which the α-amino functionality is carbamylated as a Boc-protected group and the side-chain amino group is also protected as a Boc carbamate, while the carboxylic acid remains present for peptide coupling chemistry. The molecule bears two stereochemically relevant amino acid-derived centers consistent with L-configuration and is supplied as a dicyclohexylamine (DCHA) salt, which can influence handling, crystallinity, and solubility in nonpolar versus polar organic media. The dual Boc protection pattern provides orthogonal deprotection logic relative to other amine-protecting groups, supporting controlled exposure of primary amines during sequential synthesis. The resulting reactivity profile centers on Boc-mediated amine protection/deprotection and carboxyl activation for amide bond formation, making the compound a chiral, protected diamino acid intermediate compatible with peptide building-block workflows.

1. Peptide Synthesis

Boc-L-Dap(Boc)-OH·DCHA is applied in peptide synthesis where the protected α-carboxyl group and Boc-protected diamine side chain support stepwise amide bond construction without uncontrolled cross-linking. The presence of two Boc carbamates helps suppress side reactions from the diamine during coupling and allows selective generation of a free primary amine after acid-mediated Boc removal. The amino acid backbone stereochemistry of the L-diaminopropanoic acid framework enables incorporation into peptide sequences that require defined cationic spacing for salt formation and binding-site mimicry. Downstream peptide assembly can proceed with the diamine exposed for further functionalization, enabling formation of peptide analogs and constrained cationic motifs relevant to peptide science and synthetic methodology development.

2. Side-Chain Functionalization

Boc-L-Dap(Boc)-OH·DCHA supports side-chain functionalization strategies in synthetic organic chemistry and chemical biology workflows that require controlled access to a primary amine. The side-chain Boc carbamate functions as a removable handle that can be deprotected to generate a nucleophilic diamine-derived site for acylation, sulfonylation, alkylation, or conjugation chemistry. The carboxylic acid permits conversion to activated esters or amide-forming derivatives, enabling attachment to scaffolds while maintaining orthogonal protection for sequential modification. The DCHA salt form can improve practical handling during derivatization steps, supporting preparation of functionalized amino acid derivatives used in molecular design and downstream conjugate synthesis.

3. Protected Amino Acids

Boc-L-Dap(Boc)-OH·DCHA is suitable for protected amino acid chemistry as a dual-Boc diamino acid building block that aligns with common peptide coupling and selective deprotection schemes. The α-Boc protection and side-chain Boc protection provide a two-stage amine masking pattern that can be exploited to control which nitrogen participates in subsequent transformations. The preserved carboxylic acid enables conversion into peptide-ready intermediates, supporting incorporation into protected peptide fragments and allowing C-terminal or internal residue construction depending on activation strategy. The resulting protected amino acid intermediate can be employed to generate libraries of protected diamino acid derivatives for fine chemical synthesis and stereochemically defined peptide analog preparation.

4. Bioconjugation Chemistry

Boc-L-Dap(Boc)-OH·DCHA is used in bioconjugation chemistry to prepare cationic amine-bearing linkers and amino acid-based handles for attachment to biomolecules. The diamine motif, once deprotected, can participate in nucleophilic coupling reactions that form stable amide or urea linkages, while the Boc strategy helps prevent premature reaction during linker synthesis. The amino acid-derived stereocenter can be retained to maintain structural fidelity in conjugates where spatial arrangement of cationic nitrogens influences molecular recognition. Downstream conjugate formation can be applied to labeling reagents, affinity probes, and peptide-based biomolecule modifiers that rely on controlled exposure of primary amines for reproducible attachment chemistry.

5. Process Chemistry Intermediate

Boc-L-Dap(Boc)-OH·DCHA is relevant to process chemistry intermediate preparation for industrial fine chemical synthesis where robust protection-group behavior and salt handling can be integrated into scalable manufacturing routes. The dual Boc protection pattern reduces undesired side reactions from diamine functionality during carboxyl activation and coupling operations, supporting cleaner intermediate isolation and consistent impurity profiles. The DCHA salt form can be leveraged to tune crystallization behavior and improve batch-to-batch handling characteristics during conversion to peptide building blocks or further derivatization intermediates. The compound's defined stereochemistry and protected functional-group array make it suitable for downstream manufacture of protected amino acid derivatives used across peptide science, specialty chemical production, and applied synthetic chemistry.

6. Peptidomimetics And SAR Studies

Boc-L-Dap(Boc)-OH·DCHA is applied in peptidomimetics and structure-activity relationship studies where a stereodefined diamino acid residue is incorporated to tune charge distribution and hydrogen-bonding patterns. The protected diamine side chain enables incorporation into peptide analog scaffolds while maintaining compatibility with sequential synthetic steps and controlled deprotection for later diversification. The ability to generate a free primary amine from the Boc-protected side chain supports systematic SAR-driven modification such as introducing substituted amides, cationic derivatives, or conjugatable groups on the residue. The resulting peptidomimetic building blocks can be used to construct libraries of amino acid-containing analogs for mechanistic probing and rational scaffold refinement in applied medicinal chemistry research workflows.

1. SERS spectrum of the peptide thymosin‐β4 obtained with Ag nanorod substrate

2. Immune responses to peptides containing homocitrulline or citrulline in the DR4-transgenic mouse model of rheumatoid arthritis

3. Exosomes-mediated Transfer of miR-125a/b in Cell-to-cell Communication: A Novel Mechanism of Genetic Exchange in the Intestinal Microenvironment

4. Implications of ligand-receptor binding kinetics on GLP-1R signalling

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