Boc-L-3-Aminobutyric acid is a protected amino acid derivative in which the amino group of L-3-aminobutyric acid is protected as a tert-butoxycarbonyl (Boc) carbamate, while the molecule retains the free carboxylic acid functionality characteristic of an amino acid building block. The side chain is a three-carbon aliphatic chain terminating in a primary amino substituent, giving the compound two nitrogen-containing functional groups overall (one protected carbamate nitrogen and one unprotected primary amine) and a stereocenter consistent with the L designation in the name. In peptide and amino acid derivative synthesis, this Boc-protected scaffold is used to control chemoselectivity by differentiating the protected carbamate from the free amine, supporting stepwise construction of amide-linked and amine-functionalized products for conjugation, crosslinking, or structure-activity studies.
CAT No: CP03004
Boc-L-3-Aminobutyric acid is a Boc-protected L-3-aminobutanoic acid building block featuring a protected alpha-amino group and an unprotected primary amine at the side chain, enabling controlled incorporation of the 3-aminobutyl motif into larger nitrogen-rich structures. This amino acid derivative is commonly used in peptide and peptidomimetic synthesis workflows where the Boc group provides temporary protection for stepwise assembly while the side-chain amine can be carried forward for further functionalization or for forming additional amide/urea/amine linkages.
1. Peptide And Peptidomimetic Synthesis
Boc-L-3-Aminobutyric acid is used as a protected amino acid building block for assembling peptides and peptidomimetic scaffolds that require a 3-aminobutyl side chain. Researchers in custom peptide synthesis and medicinal chemistry often select this derivative to introduce a terminally functionalized aliphatic amine at a defined position, supporting downstream derivatization without losing the ability to continue chain assembly. The Boc protection on the alpha-amino group supports sequential coupling strategies, while the side-chain primary amine provides a handle for orthogonal chemistry in later steps, such as conversion to urea or amide linkages to tune polarity and hydrogen-bonding patterns.
2. Side-Chain Functionalization Intermediates
Boc-L-3-Aminobutyric acid is widely used as an intermediate for preparing nitrogen-functionalized molecules where controlled access to both an amino functionality and a protected backbone is required. In pharmaceutical intermediate development, the side-chain primary amine enables rapid transformation into a variety of derivatives used in SAR campaigns, including amide formation with activated carboxylic acids, sulfonamide construction, and other amine-to-amine or amine-to-carbonyl coupling strategies. The Boc-protected alpha-amino group helps maintain reactivity selectivity during multistep sequences, allowing chemists to address the side-chain amine first and then manage backbone deprotection/activation when incorporating the fragment into the next synthetic stage.
3. Urea And Amide Linker Construction
Boc-L-3-Aminobutyric acid serves as a practical building block for constructing urea and amide-containing linkers that incorporate a flexible 3-aminobutyl spacer. Medicinal chemistry groups frequently use this reagent to generate libraries of analogs where the terminal amine is converted into carbonyl-linked motifs to modulate solubility, conformational freedom, and intermolecular interactions. The presence of the primary side-chain amine provides direct access to carbonyl-forming coupling outcomes, while the Boc protection on the alpha-amino group supports compatibility with peptide-coupling and derivatization workflows that require temporary suppression of backbone reactivity.
4. Polyamine-Like Fragment Building
Boc-L-3-Aminobutyric acid is also applied in the synthesis of polyamine-like fragments and nitrogen-rich scaffolds used in chemical biology and materials research, particularly when a protected amino acid-derived handle is needed to control stepwise assembly. Polymer and biomaterials chemists may incorporate the 3-aminobutyl motif into amine-functionalized intermediates that later undergo further coupling, crosslinking, or surface attachment chemistry. The derivative's protected alpha-amino group helps prevent undesired reactions during early stages, while the unprotected side-chain primary amine provides a reliable functional endpoint for subsequent conjugation steps.
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5. SERS spectrum of the peptide thymosin‐β4 obtained with Ag nanorod substrate
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