L-Quinoylalanine is an L-configured quinoyl-substituted amino acid featuring the α-amino and α-carboxyl functional groups of an amino acid framework alongside a quinoyl-containing side chain. The quinoyl moiety provides an aromatic, heteroatom-bearing functionality that can participate in noncovalent interactions and can serve as a chemical handle for derivatization or labeling, while the molecule retains the stereochemical identity implied by the "L-" designation. In biochemical and synthetic workflows, it is used as a defined amino acid building block for preparing modified peptides and as a substrate analogue in chemical biology and structure-activity studies where the quinoyl side chain is used to probe binding, labeling, or physicochemical effects.
CAT No: CP23601
L-Quinoylalanine is an L-configured amino acid derivative in which the side-chain is modified to incorporate a quinoyl (quinone-like, quinone/quinoyl) functionality while retaining the α-amino acid backbone. The molecule contains a stereogenic center at the α-carbon, pairing the L-amino acid geometry with a conjugated, redox-active aromatic system that can participate in electrophilic and nucleophilic transformations. The presence of an amino group and a carboxyl group (or their corresponding protected forms during synthesis) enables standard amino acid coupling chemistry, while the quinoyl moiety can undergo controlled derivatization or redox-dependent reactivity. As a chiral amino acid intermediate, L-Quinoylalanine can be incorporated into peptide-like scaffolds or converted into functionalized building blocks for downstream synthetic and biochemical studies.
1. Peptide Synthesis
L-Quinoylalanine supports peptide building block preparation for solid-phase or solution-phase peptide synthesis where the α-amino acid backbone enables amide bond formation at the N-terminus and the carboxyl group can be activated for coupling. The L-stereochemistry at the α-carbon provides stereodefined incorporation into peptide sequences, while the quinoyl side-chain can be maintained under appropriate conditions or selectively protected to prevent undesired side reactions during chain assembly. Side-chain reactivity can be leveraged by choosing compatible protection-group strategies for the quinoyl functionality, enabling controlled deprotection after peptide assembly. Peptide analogs containing quinoyl-bearing residues can then be used to probe sequence-dependent properties, redox behavior, and aromatic side-chain effects in peptide science and chemical biology.
2. Amino Acid Derivatization
L-Quinoylalanine serves as a chiral starting material for amino acid derivatization workflows that target the quinoyl side-chain for functional group transformation. The quinoyl motif can participate in electrophilic addition, conjugate formation, or redox-tuned chemistry, enabling conversion into quinoyl-functional intermediates such as protected quinone-like derivatives or conjugation-ready handles. The amino and carboxyl functionalities can be protected as needed to direct reactivity toward the side-chain, allowing orthogonal protection/deprotection schemes that separate backbone coupling from quinoyl modification. Downstream products include functional amino acid derivatives for incorporation into larger molecules, including peptidomimetics and redox-active probes used in applied chemical research and synthetic methodology development.
3. Chemical Biology Probes
L-Quinoylalanine can be applied in chemical biology research as a residue for constructing redox-active or aromatic side-chain probes that report on microenvironmental effects. The quinoyl side-chain provides a conjugated system that can influence electron transfer behavior and can be used to generate labeled or reactive peptide-like constructs for studying biomolecular interactions. The L-amino acid geometry supports stereochemically defined incorporation into peptide conjugates, improving interpretability in structure-function studies. Backbone-compatible functionalization enables attachment to carrier scaffolds, affinity tags, or imaging reagents, supporting downstream formation of biomolecule-modified materials used to interrogate binding, reactivity, and conformational effects.
4. Peptidomimetics And SAR
L-Quinoylalanine enables peptidomimetic construction where a quinoyl-bearing side chain is used to modulate aromaticity, conjugation, and redox character relative to canonical amino acid residues. The α-amino acid framework allows systematic variation of stereochemistry at the chiral center and controlled placement of the quinoyl moiety within a scaffold, supporting structure-activity relationship studies in medicinal chemistry and molecular design. Side-chain functionalization strategies can be tuned to generate analogs with distinct reactivity profiles, while backbone protection and coupling compatibility support iterative synthesis of libraries. Resulting quinoyl-containing peptidomimetics can be used as research intermediates for SAR-driven optimization of binding motifs and for studying how redox-active aromatic features influence molecular recognition.
5. Process Chemistry Intermediate
L-Quinoylalanine is suitable for process chemistry intermediate preparation in fine chemical manufacturing routes that require a chiral amino acid building block with a functional side chain. The presence of an L-configured α-carbon and standard amino acid functionality supports scalable protection-group strategies for controlled handling of the amino and carboxyl groups during downstream transformations. The quinoyl side-chain can be managed through selection of reaction conditions and temporary protection to minimize degradation or overreaction, enabling conversion into activated derivatives for coupling or further functionalization. Industrially relevant downstream uses include preparation of specialty amino acid derivatives, peptide coupling-ready intermediates, and redox-active building blocks that feed into larger manufacturing programs for research-grade reagents and functional materials.
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