Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride is a protected amino acid N-carboxyanhydride derived from L-aspartic acid, featuring a β-benzyl ester side chain and a Boc-protected amino functionality that is converted into the corresponding cyclic activated carboxyanhydride. The molecule contains the N-carboxyanhydride ring for controlled acyl transfer chemistry, while the Boc group and the benzyl ester protect the amino and side-chain carboxyl functionalities from undesired reactions during polymerization or stepwise chain growth. As an amino acid carboxyanhydride, it is employed as a precursor for preparing aspartate-containing peptide or polypeptide segments in solution or solid-phase workflows, and it can be used in synthetic studies that require incorporation of an aspartate residue with defined side-chain ester protection.
CAT No: CP00417
Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride is an activated aspartate-derived amino acid carboxyanhydride designed for controlled peptide chain growth under carboxyanhydride polymerization/segment-condensation conditions. The L-aspartate stereochemistry and side-chain functionality are preserved through the β-benzyl ester, while the Boc group provides a protected amino terminus for downstream assembly into peptide intermediates. This reagent form is widely used in research and process development settings where carboxyanhydride chemistry enables efficient preparation of aspartate-containing peptide segments and related protected intermediates.
1. Carboxyanhydride Peptide Segments
Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride is used by peptide synthesis groups to build aspartate-containing peptide segments via carboxyanhydride-based chain extension workflows. Researchers often select this specific activated form when they need reliable incorporation of the aspartate residue while maintaining the side-chain as a benzyl ester, which can be carried through early assembly steps and later transformed under standard peptide-processing conditions. The Boc-protected amino terminus supports compatibility with protected-peptide strategies, making the reagent a practical choice for constructing defined oligomers and protected intermediates for subsequent coupling or deprotection.
2. Protected Aspartate Intermediate Synthesis
Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride serves as a key intermediate building block for preparing protected aspartate derivatives used in custom peptide manufacturing and medicinal chemistry intermediate development. In development laboratories, the β-benzyl ester side-chain protection is leveraged to manage aspartate's carboxyl reactivity during multi-step synthetic sequences, particularly when orthogonal functional group handling is required across coupling, purification, and final deprotection stages. The carboxyanhydride activation provides a convenient route to peptide-ready protected constructs where the aspartate residue must be introduced in a controlled, residue-specific manner.
3. Aspartate-Rich Oligomer Development
Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride is frequently employed in research programs that generate aspartate-rich oligomers and protected peptide scaffolds for structure-property studies. Peptide chemists value this reagent when the target sequence requires multiple aspartate residues or when aspartate side-chain protection must be maintained consistently across the growing chain to reduce side reactions and improve reproducibility. The combination of L-configuration retention and stable side-chain ester protection supports downstream processing into final peptide constructs used in chemical biology tool development and protein-interaction studies.
4. Process-Scale Peptide Building
Boc-L-aspartic acid β-benzyl ester N-carboxyanhydride is also used in industrial and semi-industrial peptide intermediate workflows where activated amino acid reagents can improve step economy and reproducibility for protected peptide segment manufacture. Process development teams often choose carboxyanhydride reagents to streamline the introduction of specific residues—here, an aspartate unit with benzyl ester side-chain protection—into protected oligomer intermediates that can be carried forward to final assembly. This application is particularly relevant when aspartate protection must remain intact through multiple downstream operations, supporting consistent quality in peptide intermediate supply for custom synthesis programs.
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