D-Isoglutamine benzyl ester hydrochloride is a D-configured amino acid derivative related to glutamine isomers, featuring an amino acid backbone bearing an amide side chain and an esterified carboxyl group converted to a benzyl ester. The molecule contains a free (or salt-associated) amino functionality and an amide side chain, while the carboxyl group is protected as a benzyl ester and the overall hydrochloride form provides chloride counterion for salt stabilization. It is used as a protected amino acid ester building block in peptide synthesis and in the preparation of more complex glutamine-like amide-containing peptides or conjugates, where the benzyl ester can support controlled stepwise assembly and downstream deprotection strategies.
CAT No: CP00758
D-Isoglutamine benzyl ester hydrochloride is a D-configured amino acid derivative featuring an isoglutamine (side-chain amide) motif, a benzyl ester functionality at the carboxylate position, and a hydrochloride salt form that supports handling of the amino group during synthesis. The molecule contains a stereogenic center consistent with D-amino acid chemistry, enabling stereochemically defined incorporation into peptide-like constructs and chiral intermediate sequences. The benzyl ester can participate in standard protecting-group strategies by remaining stable under many coupling conditions while enabling acid-mediated deprotection when benzyl cleavage is desired. The side-chain primary amide and the salt-associated amino functionality provide complementary nucleophilicity and hydrogen-bonding patterns that can be leveraged for derivatization, coupling, and downstream functional group transformations.
1. Protected Amino Acid Synthesis
D-Isoglutamine benzyl ester hydrochloride supports protected amino acid synthesis workflows where a D-configured, side-chain-amide-bearing building block is required for controlled peptide coupling. The benzyl ester and hydrochloride salt arrangement provide a practical orthogonal protection profile that helps manage carboxyl activation chemistry while maintaining the amino functionality in a synthetically addressable state. The D stereocenter enables stereochemically defined sequences during stepwise assembly, including the preparation of D-isoglutamine-containing intermediates for iterative synthesis. The side-chain amide can be retained through coupling steps and then transformed or unmasked in later stages, supporting protected amino acid chemistry and chiral intermediate preparation for fine chemical manufacturing.
2. Peptide Coupling Chemistry
D-Isoglutamine benzyl ester hydrochloride is suitable for peptide synthesis and peptide building block preparation where a protected carboxyl group and a functional side-chain amide are required for amide bond formation. The benzyl ester can be used as a carboxyl-protection handle while the amino functionality participates in coupling chemistry to generate peptide-like amide linkages with controlled stereochemistry at the D-center. The side-chain amide enables formation of intramolecular hydrogen-bonding patterns and can serve as a handle for subsequent derivatization into constrained or functionalized peptidomimetic motifs. The salt form can facilitate reproducible handling in automated or batch peptide assembly processes, supporting downstream conversion into D-amino acid derivatives used in structure-defined scaffold construction.
3. Bioconjugation Linker Development
D-Isoglutamine benzyl ester hydrochloride can be applied to chemical biology and bioconjugation linker development where a D-amino acid scaffold provides defined stereochemistry and robust amide-based functionality. The side-chain primary amide and the benzyl ester protection strategy allow staged functional group manipulation, including conversion to activated derivatives or incorporation into conjugation-ready intermediates after appropriate deprotection. The D-configuration can be leveraged to tune stability against enzymatic recognition and to maintain stereochemical integrity during conjugation chemistry. The resulting amino acid-based intermediates can be used to generate labeled biomolecule analogs, affinity probes, or peptide-based materials where controlled functional group placement and hydrogen-bonding capacity are relevant to molecular recognition.
4. Peptidomimetics And SAR Studies
D-Isoglutamine benzyl ester hydrochloride serves in peptidomimetic construction and structure-activity relationship studies where side-chain amide chemistry is used to probe binding interactions in amino acid-derived scaffolds. The isoglutamine side-chain amide provides a polar functional element that can be preserved, amidated, alkylated, or otherwise functionalized to generate a series of analogs with systematic changes to hydrogen-bonding and steric properties. The benzyl ester protection enables synthetic sequences that separate carboxyl management from side-chain modification, supporting orthogonal derivatization strategies common in SAR workflows. The D stereochemistry supports stereochemical mapping of binding determinants and can be incorporated into analog libraries for mechanistic studies of peptide-like recognition patterns.
5. Process Chemistry Intermediate Preparation
D-Isoglutamine benzyl ester hydrochloride is applicable as a chiral amino acid intermediate in process chemistry and specialty chemical production where protection-group logic and salt handling can be integrated into manufacturing routes. The benzyl ester provides a chemically addressable carboxyl protection mode that can be carried through coupling and intermediate transformations before controlled deprotection, aligning with scalable synthetic planning. The hydrochloride salt form can improve material handling characteristics for downstream conversions into activated carboxylic acid derivatives or coupling-ready species. The presence of the D-configured stereocenter and the side-chain amide supports reproducible generation of stereochemically defined building blocks used in industrial peptide intermediate preparation and applied fine chemical synthesis.
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