Boc-L-Lys(Palm)-OH

Boc-L-Lys(Palm)-OH is a Boc-protected lysine building block bearing a side-chain Palm protecting group on the ε-amino functionality, providing orthogonal protection for stepwise peptide assembly. The lysine backbone is in the L-configuration, and the protected ε-amino group is designed to tolerate standard peptide synthesis conditions while remaining available for controlled deprotection and subsequent coupling. As a protected amino acid intermediate, it is commonly selected in peptide chemistry workflows that require robust side-chain protection and reliable segment condensation for lysine-containing sequences.

1. Solid-Phase Peptide Synthesis

Boc-L-Lys(Palm)-OH is used by peptide synthesis groups to incorporate lysine residues into protected peptide sequences where both the α-amino group and the ε-amino side chain must be masked during chain elongation. The Boc group supports Fmoc-free or Boc-based synthetic strategies, while the Palm-protected lysine side chain helps maintain chemoselectivity during repeated coupling cycles, enabling consistent assembly of lysine-rich peptides. This format is particularly useful when downstream steps require selective unmasking of the lysine ε-amino group for further functionalization, branching, or attachment of additional protected fragments.

2. Lysine Side-Chain Functionalization

Boc-L-Lys(Palm)-OH serves as a practical intermediate for workflows that plan controlled exposure of the lysine ε-amino group after peptide assembly. Researchers use this protected lysine to prepare peptide scaffolds that will later be modified at the side chain, such as for attachment of affinity tags, conjugation handles, or additional amino acid units in branching architectures. The Palm protection pattern helps reduce premature side reactions of the ε-amino group during peptide synthesis, supporting cleaner downstream derivatization of the lysine side chain while preserving the peptide backbone integrity.

3. Pharmaceutical Intermediate Building Blocks

Boc-L-Lys(Palm)-OH is frequently employed in medicinal chemistry and custom peptide manufacturing as a protected lysine unit for generating peptide-based intermediates used in lead optimization and structure-activity relationship studies. Development teams rely on protected amino acid building blocks to standardize the preparation of lysine-containing fragments with defined protection patterns, which streamlines the assembly of complex intermediates and reduces variability between batches. The combination of α-Boc protection with a Palm-protected ε-amino side chain supports predictable handling during intermediate synthesis, purification, and subsequent conversion into higher-order peptide structures.

1. Oleic acid and glucose regulate glucagon-like peptide 1 receptor expression in a rat pancreatic ductal cell line

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

3. Cationic cell-penetrating peptides are potent furin inhibitors

4. Characterization of Novel P-Selectin Targeted Complement Inhibitors in Murine Models of Hindlimb Injury and Transplantation

5. cRGD-functionalized, DOX-conjugated, and 64Cu-labeled superparamagnetic iron oxide nanoparticles for targeted anticancer drug delivery and PET/MR imaging