Boc-11-Aminoundecanoic acid

Boc-11-Aminoundecanoic acid is a Boc-protected amino acid building block featuring an 11-carbon aliphatic side chain, providing a long, flexible spacer for chemical and peptide-related synthesis. The Boc group on the amino functionality supports controlled stepwise assembly in protected amino acid workflows, while the extended hydrophobic chain makes it useful for constructing linkers and spacer segments where conformational freedom and distance control are required. As a protected amino acid intermediate, it is commonly selected when downstream coupling requires a stable, non-zwitterionic handle that can be incorporated into larger synthetic sequences.

1. Linker Building Blocks

Boc-11-Aminoundecanoic acid is frequently used by medicinal chemistry and chemical biology teams to build long-chain amine-containing linkers for conjugation-ready intermediates. The extended undecyl spacer helps separate functional domains in multicomponent constructs, such as tethered ligands, polymer conjugates, and affinity reagents, where steric spacing can improve coupling efficiency and downstream handling. Its Boc-protected amine format supports stepwise synthesis of amine-functional derivatives while maintaining compatibility with common protecting-group strategies used in linker assembly.

2. Peptide Spacer Synthesis

Boc-11-Aminoundecanoic acid supports the preparation of peptide and peptidomimetic segments that require a hydrophobic, flexible spacer between bioactive motifs. Researchers building custom peptides for structure-activity relationship studies, receptor-binding probes, or enzyme-substrate analogs often select this type of long-chain amino acid building block to modulate effective distance and conformational sampling along the peptide backbone. The Boc-protected amino group enables its use as a defined, protected unit during protected-amino-acid assembly workflows, helping maintain sequence integrity when preparing longer, multi-residue constructs.

3. Pharmaceutical Intermediate Development

Boc-11-Aminoundecanoic acid is applied in pharmaceutical intermediate development where long aliphatic amines are needed as synthetic handles for further functionalization. Process and R&D chemists use this protected amino acid to introduce a controlled, linear spacer into larger molecules, including intermediates for amide formation, urea/amine derivatives, and subsequent derivatization steps that require a stable protected amine during earlier stages of synthesis. The combination of a Boc-protected nitrogen and a hydrophobic, flexible chain makes it practical for assembling complex intermediates without exposing a free amine prematurely.

4. Surface And Polymer Conjugation

Boc-11-Aminoundecanoic acid is commonly incorporated into linker precursors used for surface immobilization and polymer conjugation strategies that rely on primary amine functionality after deprotection. Materials and bioconjugation groups use the long aliphatic chain to improve accessibility of the reactive amine to coupling chemistry and to tune the spacing between the surface and the attached biomolecule or functional group. The protected form supports controlled manufacturing of conjugation-ready intermediates, allowing the amine to be generated at the appropriate stage for coupling to activated surfaces, polymer backbones, or other macromolecular platforms.

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