L-Isoglutamine benzyl ester hydrochloride is a derivative of the amino acid isoglutamine featuring a benzyl ester on the carboxyl functionality while retaining the amino acid backbone and the side-chain amide characteristic of glutamine/isoglutamine analogues. The molecule is present as a hydrochloride salt, and the benzyl ester masks the carboxyl group to modulate polarity and chemoselectivity during handling, with stereochemistry specified as L at the α-position. It is used as a protected, carboxyl-derivatized amino acid building block for peptide and peptidomimetic synthesis and for preparing labeled or conjugatable isoglutamine-like residues where controlled deprotection and side-chain amide preservation are relevant to downstream coupling and analytical studies.
CAT No: CP00759
L-Isoglutamine benzyl ester hydrochloride is a chiral amino acid derivative featuring the L-isoglutamine side chain with a primary amide functionality and an amino acid backbone converted to a benzyl ester, present as the hydrochloride salt. The molecule bears a stereogenic center at the alpha carbon, enabling stereochemically defined incorporation into peptide-like constructs and synthetic intermediates. The benzyl ester and salt-forming amino functionality provide practical handles for protection and controlled deprotection, while the side-chain amide can participate in hydrogen-bonding-driven recognition and can be selectively transformed for further functionalization. The overall reactivity profile supports amino acid ester chemistry, peptide coupling compatibility after appropriate activation, and downstream derivatization commonly used in amino acid modification workflows.
1. Peptide Synthesis
L-Isoglutamine benzyl ester hydrochloride is applied in peptide building block preparation where the benzyl ester serves as a protected C-terminal functionality for stepwise chain assembly. The L-isoglutamine stereocenter and the side-chain amide enable construction of peptide analogs that maintain the isoglutamine geometry important for conformational and hydrogen-bonding patterns. The hydrochloride salt form can be leveraged to manage amine protonation state during coupling and to support consistent handling in protected amino acid synthesis. The resulting protected amino acid derivative can be activated for amide bond formation, supporting the generation of short peptides and peptidomimetic sequences used in biochemical research and synthetic organic chemistry.
2. Side-Chain Functionalization
L-Isoglutamine benzyl ester hydrochloride supports side-chain functionalization strategies because the side-chain primary amide provides a defined polar motif for chemical modification. The benzyl ester enables orthogonal protection relative to the amide, allowing selective transformations on the side chain while deferring backbone deprotection until later stages. Amide-to-derivative conversions and controlled functional group interconversions can be used to access analogs with altered hydrogen-bonding capacity, improved solubility, or tailored binding properties for structure-activity relationship studies. Downstream products derived from this intermediate can serve as research intermediates for medicinal chemistry campaigns and as defined building blocks for fine chemical synthesis.
3. Chemical Biology Probes
L-Isoglutamine benzyl ester hydrochloride is suitable for chemical biology workflows that require incorporation of an isoglutamine-like residue into labeled or affinity-tagged molecular probes. The side-chain amide can participate in specific intermolecular interactions, supporting probe design where hydrogen-bonding networks influence target recognition. The protected C-terminal benzyl ester and stereochemical integrity help maintain consistent chemical identity during synthesis of peptide-based probes and conjugation precursors. The hydrochloride salt form can facilitate handling during derivatization steps that ultimately generate functional molecules for biomolecular recognition studies and analytical research.
4. Protected Amino Acid Chemistry
L-Isoglutamine benzyl ester hydrochloride is used as a chiral protected amino acid intermediate in synthetic routes that require controlled ester protection and predictable deprotection behavior. The benzyl ester provides a removable C-terminal protecting group strategy compatible with orthogonal protection schemes commonly applied in peptide synthesis and amino acid derivatization. The L-configuration at the alpha carbon supports stereochemically defined intermediate formation, which is critical when downstream steps depend on stereochemical fidelity for coupling or for generating stereopure peptidomimetics. The side-chain amide remains available for selective transformations, enabling construction of a range of protected amino acid derivatives used across process chemistry intermediate preparation and specialty chemical production.
5. Pharmaceutical Manufacturing Intermediates
L-Isoglutamine benzyl ester hydrochloride can be employed in pharmaceutical manufacturing intermediate preparation where protected amino acid derivatives are required for scalable synthesis of peptide-like intermediates. The molecule's benzyl ester and hydrochloride salt form support practical protection-state control during multi-step processing, aligning with industrially relevant synthetic planning for protected amino acid chemistry. The defined stereocenter and functional group set can be carried through to downstream coupling or conversion operations that generate drug-relevant scaffolds or peptidomimetic precursors. The intermediate nature of this compound makes it applicable to fine chemical synthesis and chemical manufacturing routes that prioritize reproducible stereochemical outcomes and functional group compatibility.
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