Boc-D-Lys(Boc)-OH*DCHA

Boc-D-Lys(Boc)-OH*DCHA is a protected lysine derivative featuring a Boc-protected amino acid backbone and a Boc-protected side-chain amino group, supplied as a dicyclohexylamine (DCHA) salt for improved handling and crystallinity in peptide chemistry workflows. The D-configuration at the alpha-carbon makes it a stereochemically defined building block for incorporating D-lysine residues into peptides and peptidomimetics. With two Boc-protected amines, this reagent is designed for controlled deprotection and subsequent amide bond formation during peptide assembly, supporting the preparation of stereochemically pure peptide intermediates and final sequences.

1. D-Lysine Peptide Building Block

Boc-D-Lys(Boc)-OH*DCHA is used by peptide synthesis groups to introduce a D-lysine residue into custom peptides where stereochemistry at the lysine alpha-carbon is a key design parameter. The dual Boc protection pattern supports sequential deprotection strategies in both segment condensation and protected-amino-acid assembly workflows, enabling downstream coupling to form peptide bonds while minimizing side reactions from the primary amine functionalities. Researchers developing D-amino-acid-containing peptides for structure-activity relationship studies and conformational control often select this specific protected lysine salt to maintain consistent reactivity and reproducible incorporation during synthesis.

2. Protected Intermediate For Libraries

Boc-D-Lys(Boc)-OH*DCHA is commonly selected for peptide library construction and modified peptide development because it provides a stable, isolable protected lysine unit that can be incorporated into multiple analogs with the same stereochemical and protection pattern. Medicinal chemistry and chemical biology teams preparing focused libraries of lysine-containing sequences rely on such protected amino acid salts to streamline parallel synthesis and to keep the side-chain amine masked until the desired stage of assembly. The presence of Boc groups on both the backbone and side chain supports controlled functional-group exposure, which is particularly useful when later steps require selective derivatization or when multiple protected segments must be assembled without premature amine reactivity.

3. Peptidomimetic And SAR Studies

Boc-D-Lys(Boc)-OH*DCHA supports peptidomimetic development where D-lysine incorporation is used to tune peptide properties through stereochemical substitution rather than through changing the lysine side-chain chemistry. In structure-activity relationship workflows, this reagent enables the preparation of analog series that differ specifically at the lysine stereocenter while retaining the protected amine functionality until coupling and final deprotection. Peptide chemistry teams working on backbone-modified or stereochemically defined analogs often prefer a Boc-protected D-lysine salt to ensure consistent coupling behavior and to reduce variability between synthesized analogs.

4. Pharmaceutical Intermediate Synthesis

Boc-D-Lys(Boc)-OH*DCHA is also used in the upstream development of peptide-based pharmaceutical intermediates, where defined, stereochemically pure protected amino acids are required to build larger protected fragments before final processing. Process development and custom manufacturing groups value the protected Boc/Boc protection pattern for its compatibility with standard protected-amino-acid handling and for enabling predictable downstream transformations during fragment assembly. This lysine derivative salt form is frequently chosen when robust solid handling and consistent reactivity of the protected amine building block are important for producing peptide intermediates at scale for research and development programs.

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