Boc-Glu-OcHex is a Boc-protected glutamic acid derivative in which the α-amino group is protected as a tert-butoxycarbonyl (Boc) carbamate and the carboxyl functionality is present as an OcHex ester. The side chain contains a γ-carboxyl group characteristic of glutamate, while the OcHex group (an esterified carboxyl form) modulates polarity and chemoselectivity relative to the corresponding free diacid, and the molecule retains the amino acid backbone with defined connectivity between the α-amino, α-carboxyl, and glutamate side chain. In peptide and amino-acid derivative synthesis, this protected glutamate ester is used as a precursor that can be assembled into larger peptide frameworks under conditions that require controlled handling of the amino group and protection/activation of carboxyl functionality for stepwise coupling and downstream functionalization.
CAT No: CP26353
CAS No:137506-13-9
Synonyms/Alias:BOC-GLU-OCHEX;137506-13-9;CTK3J1706;ZINC2555003;6363AH;K-4437
Boc-Glu-OcHex is a protected glutamic acid derivative featuring a Boc-protected alpha-amino group and a side-chain carboxyl group masked as an OcHex ester, providing controlled reactivity for peptide and peptide-segment synthesis. The glutamate side chain retains the correct carbon framework for incorporation into longer sequences, while the orthogonally protected carboxyl functionality helps manage chemoselectivity during stepwise assembly. This reagent is typically handled as a peptide-building block for protected intermediate workflows where acid-labile deprotection and subsequent coupling are required.
1. Solid-Phase Peptide Synthesis
Boc-Glu-OcHex is frequently used as a glutamate residue building block in solid-phase peptide synthesis workflows, where the Boc group and the OcHex side-chain ester support sequential coupling and controlled deprotection. Peptide synthesis groups rely on this protected form to minimize side reactions from the glutamate side-chain carboxyl during chain elongation, improving the reliability of segment assembly and downstream purification. The reagent is especially useful when glutamate must be incorporated as a defined residue while preserving the side-chain functionality for later conversion to the free carboxyl or for continued orthogonal protection strategies.
2. Solution-Phase Segment Coupling
Boc-Glu-OcHex is also applied in solution-phase peptide synthesis for preparing glutamate-containing peptide segments and intermediates, where chemoselective handling of the side-chain carboxyl is critical. Custom peptide manufacturing and medicinal chemistry chemistry teams use this type of protected amino acid derivative to reduce competing reactions that can arise from unprotected acidic side chains during condensation steps. The OcHex side-chain protection enables the glutamate residue to be introduced cleanly into larger fragments, supporting consistent coupling outcomes and facilitating purification of intermediates prior to final deprotection and assembly.
3. Protected Glutamate Intermediate Development
Boc-Glu-OcHex is well suited to pharmaceutical intermediate development and specialty peptide intermediate manufacturing when a protected glutamate unit must be carried through multi-step synthetic sequences without premature side-chain activation or hydrolysis. Process development chemists and contract synthesis groups select this reagent to manage functional-group compatibility across steps, particularly when the side-chain carboxyl needs to remain masked until a planned deprotection or activation stage. This makes Boc-Glu-OcHex a practical choice for building protected glutamate-containing intermediates that later serve as inputs for further derivatization, peptide assembly, or conversion to carboxylic acid functionalities under controlled conditions.
4. Glutamate Side-Chain Functionalization
Boc-Glu-OcHex is commonly used as a starting protected glutamate unit for workflows that require later transformation of the side-chain carboxyl into a defined derivative after peptide or intermediate assembly. Chemical biology and peptide engineering groups use protected glutamate residues to prepare sequences or fragments in which the side-chain carboxyl is reserved for subsequent modification, such as conversion to a free acid for standard peptide chemistry steps or controlled derivatization in downstream intermediate processing. The Boc/OcHex protection pattern supports maintaining the glutamate side chain in a protected state during earlier stages, helping ensure that functionalization occurs at the intended step rather than during initial coupling operations.
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