Cbz-L-3-Aminobutyric acid is a protected, naturally occurring amino acid derivative in which L-3-aminobutyric acid is capped at the α-amino group with a benzyloxycarbonyl (Cbz) protecting group, while retaining the free carboxylic acid functionality. The molecule therefore contains both an unprotected carboxyl group and a stereochemically specified L-configuration at the α-carbon, with the Cbz carbamate masking the amino group to reduce undesired side reactions during coupling. In peptide and amino acid synthesis workflows, the protected analogue is used as a building block that supports chemoselective formation of amide bonds at the carboxyl/activated carboxyl stage, and it can be deprotected to regenerate the amino functionality for subsequent assembly or further derivatization.
CAT No: CP03006
Cbz-L-3-Aminobutyric acid is an L-amino acid derivative featuring a chiral 3-aminobutyric acid backbone with a protected α-amino group masked as a benzyloxycarbonyl (Cbz) carbamate. The molecule contains a free carboxylic acid suitable for amide formation while the Cbz group provides stable handling during peptide coupling and can be removed under hydrogenolysis or strong deprotection conditions, enabling orthogonal protection schemes. The aliphatic side chain (-CH2-CH2-CH3) supports hydrophobic and conformationally informative incorporation into short peptides and peptidomimetic scaffolds. As a chiral amino acid intermediate, it exhibits the reactivity profile expected for protected amino acids used in peptide synthesis and downstream functionalization of the amino acid framework.
1. Peptide Synthesis
Cbz-L-3-Aminobutyric acid is used in peptide synthesis as a Cbz-protected amino acid building block for stepwise assembly of amide bonds at the α-carboxyl group. The free carboxylic acid participates in standard peptide coupling chemistry, while the Cbz carbamate on the stereodefined L-amino center suppresses undesired side reactions during chain elongation. Deprotection of the Cbz group enables controlled generation of the amino functionality for subsequent coupling steps or for terminal functionalization. Incorporation of the 3-aminobutyric acid side chain can modulate local hydrophobicity and backbone conformation in peptide analogs, supporting scaffold construction for biochemical research and synthetic methodology development.
2. Side-Chain Functionalization
Cbz-L-3-Aminobutyric acid serves as a chiral precursor for side-chain derivatization strategies that introduce additional functional handles onto the aliphatic 3-aminobutyric framework. The protected α-amino group allows selective transformations on the carboxyl group or side-chain under conditions compatible with carbamate stability, supporting routes to amino acid esters, amides, or activated intermediates for further elaboration. Cbz deprotection can then regenerate the free amine for conjugation, cyclization, or incorporation into larger molecular architectures such as peptidomimetic rings. Downstream products derived from this intermediate can be used to generate structure-activity relationship (SAR) libraries and to prepare functionalized amino acid derivatives for chemical biology workflows.
3. Protected Amino Acids
Cbz-L-3-Aminobutyric acid is suitable for protected amino acid chemistry where orthogonal protection and predictable deprotection behavior are required for multistep synthesis. The Cbz carbamate provides a stable N-protection element that withstands many coupling and intermediate-forming steps while maintaining stereochemical integrity at the L-center. The free carboxylic acid enables conversion to peptide-compatible activated forms, supporting iterative synthesis of protected amino acid sequences or fragment assembly. Hydrogenolysis-based removal of the Cbz group can be used to unmask the amino functionality at a chosen stage, facilitating controlled construction of N-terminus or internal residue derivatives in peptide science and fine chemical synthesis.
4. Chemical Biology Probes
Cbz-L-3-Aminobutyric acid can be applied in chemical biology research to prepare amino acid-containing probes and peptide-like constructs for biomolecular interaction studies. The combination of a protected amino group and a carboxylic acid enables attachment to linkers, formation of amide-linked conjugates, or incorporation into labeling peptides where subsequent deprotection and coupling steps are needed. The aliphatic side chain supports hydrophobic contact formation and can influence solubility and conformational preferences in probe design. Generated derivatives can function as intermediates for biomolecule modification, including preparation of labeled fragments used in binding assays, molecular recognition studies, and analytical method development.
5. Process Chemistry Intermediate
Cbz-L-3-Aminobutyric acid is relevant to process chemistry and specialty chemical production as a chiral, N-protected amino acid intermediate that fits scalable synthetic planning for peptide building blocks. The Cbz protection strategy offers a practical handle for controlling chemoselectivity during manufacturing steps that form activated carboxylic acid derivatives and assemble amide linkages. The stereodefined L-configuration supports downstream consistency for peptide coupling performance and reproducible intermediate quality in batch production. Carbamate deprotection to liberate the amino group can be integrated into downstream manufacturing routes for producing protected or unprotected amino acid derivatives used in industrial peptide and peptidomimetic workflows.
6. Peptidomimetics And SAR Studies
Cbz-L-3-Aminobutyric acid is utilized in peptidomimetic construction and SAR studies as an aliphatic chiral residue that can be incorporated into constrained or functionalized peptide analogs. The protected α-amino group supports controlled coupling to form amide frameworks, while the side-chain structure can be leveraged to tune hydrophobic surface area and conformational behavior. Cbz deprotection enables sequential functionalization steps, including attachment of additional substituents or formation of further protected derivatives for library synthesis. Resulting peptidomimetic intermediates can be advanced into structure-focused design cycles where amino acid derivatization and stereochemically defined scaffold assembly are central to generating comparable analog series for analytical and research applications.
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