N-Fmoc-4-methoxybenzyl-glycine is a protected glycine analog featuring a methoxybenzyl substituent that enhances steric control. The residue is used in synthetic routes requiring aromatic tagging and modulation of backbone conformation. Researchers apply it to investigate linker design and side-chain orientation. Its protection scheme supports orthogonal peptide assembly.
CAT No: R2160
CAS No:1464058-65-8
Synonyms/Alias:N-Fmoc-4-methoxybenzyl-glycine;1464058-65-8;N-(((9H-FLUOREN-9-YL)METHOXY)CARBONYL)-N-(4-METHOXYBENZYL)GLYCINE;{[(9H-fluoren-9-ylmethoxy)carbonyl][(4-methoxyphenyl)methyl]amino}acetic acid;F80973;2-[9H-fluoren-9-ylmethoxycarbonyl-[(4-methoxyphenyl)methyl]amino]acetic acid;
N-Fmoc-4-methoxybenzyl-glycine is a synthetic amino acid derivative widely utilized in peptide chemistry and advanced biochemical research. Structurally, it features a glycine backbone modified with a 4-methoxybenzyl group and protected at the N-terminus with a fluorenylmethyloxycarbonyl (Fmoc) moiety. This dual modification imparts unique chemical properties, making the compound especially valuable for solid-phase peptide synthesis (SPPS) and the construction of complex peptide architectures. The presence of the 4-methoxybenzyl substituent allows for orthogonal deprotection strategies, enhancing the versatility and selectivity of synthetic protocols. As a result, N-Fmoc-4-methoxybenzyl-glycine is regarded as a critical building block for researchers developing novel peptides, studying structure-activity relationships, or engineering functionalized peptide-based materials.
Peptide Synthesis: In the context of SPPS, the compound serves as a protected glycine analog that facilitates the stepwise assembly of peptides. Its Fmoc group enables mild base-labile deprotection, which is compatible with a wide range of amino acid side-chain protecting groups. The 4-methoxybenzyl modification provides an additional layer of orthogonal protection, allowing selective manipulation of the glycine residue during synthesis. This feature is particularly advantageous when synthesizing peptides that require site-specific modifications or when incorporating noncanonical amino acids into challenging sequences.
Orthogonal Protection Strategies: The 4-methoxybenzyl group on the glycine side chain offers unique possibilities for orthogonal deprotection protocols. Researchers can exploit the differential lability of the Fmoc and 4-methoxybenzyl groups to achieve sequential deprotection, enabling the introduction of further modifications or conjugations at defined positions within the peptide chain. This property is essential for the synthesis of branched peptides, cyclic peptides, or peptide-drug conjugates where selective functionalization is required.
Structure-Activity Relationship Studies: The incorporation of N-Fmoc-4-methoxybenzyl-glycine into peptide sequences allows for systematic exploration of how side-chain modifications impact biological activity, stability, or folding. By substituting native glycine residues with this derivative, scientists can probe the effects of steric and electronic changes on peptide conformation and function. This capability is instrumental in the rational design of peptide therapeutics, enzyme inhibitors, or bioactive probes, supporting the development of molecules with improved selectivity or potency.
Peptide-Based Material Science: The unique chemical features of this protected glycine analog make it suitable for the synthesis of functionalized peptide materials. Researchers in the field of biomaterials leverage such derivatives to introduce specific chemical handles or responsive elements into peptide backbones, enabling the fabrication of hydrogels, nanostructures, or surface coatings with tailored properties. The ability to selectively deprotect and further derivatize the 4-methoxybenzyl group expands the toolkit for designing advanced materials with applications in biosensing, drug delivery, or tissue engineering.
Analytical Method Development: Due to its distinct chemical structure, N-Fmoc-4-methoxybenzyl-glycine is also employed as a model compound or standard in the optimization of chromatographic and spectrometric methods. Its defined protecting groups and side-chain modification make it a valuable reference for validating cleavage protocols, monitoring deprotection efficiency, or calibrating detection systems during peptide synthesis workflows. This application supports quality control and methodological refinement in both research and industrial peptide production environments.
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