N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine is a protected, derivatized L-ornithine amino acid derivative in which the α-amino group is carbamylated with a Boc protecting group and the δ-amino functionality is substituted with a 1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl moiety. The molecule contains both an amino acid α-carboxyl group and an α-carbon bearing the L-ornithine backbone, with the side-chain amine rendered non-free by the δ-substitution, while the Boc group and the cyclic dioxo "ylidene" substituent provide controlled chemoselectivity and conformationally defined functionality for downstream transformations. In peptide and amino acid synthesis workflows, this protected analogue is employed as a stepwise building block precursor where orthogonal protection and a masked side-chain nitrogen help manage side reactions and enable incorporation of a modified ornithine residue into larger peptide or peptidomimetic targets.
CAT No: CP08708
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine is an L-ornithine-derived amino acid derivative bearing an N-terminal Boc protecting group and a δ-side-chain nitrogen substituted with a 1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethylidene motif. The molecule retains the ornithine stereochemical framework at the α-carbon while presenting a protected α-amino functionality and a masked side-chain amine that can be selectively unveiled or transformed under peptide-synthesis compatible conditions. The appended cyclic dione/ylidene group introduces a rigid, electrophile-bearing handle that can participate in downstream derivatization and can be used to tune solubility and reactivity during intermediate handling. The presence of a free carboxylate (or carboxylic acid form depending on salt state) and protected amine functionality makes the compound suitable for controlled amino acid coupling, orthogonal protection strategies, and conversion into peptide building blocks or functional ornithine analogs for synthetic and biochemical studies.
1. Peptide Synthesis
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine supports peptide building block preparation and stepwise chain assembly in peptide synthesis workflows. The Boc group on the α-amino terminus enables standard N-protection/deprotection logic for orthogonal coupling, while the δ-side-chain nitrogen substitution provides a protected ornithine motif that can be carried through coupling steps without uncontrolled side reactions. The carboxyl functionality can be activated for amide bond formation to generate ornithine-containing peptide fragments with controlled side-chain chemistry. Downstream peptide analog construction can leverage the masked δ-nitrogen to introduce controlled cationic or functional side-chain patterns after selective transformation, aligning with peptide chemistry needs for chemoselective synthesis and reproducible intermediate quality.
2. Side-Chain Functionalization
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine is suitable for side-chain functionalization strategies where ornithine's δ-amino functionality is temporarily masked by an electrophile-bearing, carbonyl-rich substituent. The 4,4-dimethyl-2,6-dioxocyclohex-1-ylidene motif can serve as a reactive handle for further chemical modification, enabling controlled installation of functional groups on the ornithine side chain without disturbing the α-amino protection logic. The stereodefined α-carbon and preserved amino acid backbone facilitate incorporation into larger scaffolds while maintaining predictable regiochemistry at the side chain. The resulting derivatives can be used to generate ornithine-based probes, constrained peptidomimetic elements, or intermediate platforms for subsequent conjugation and structure-activity relationship studies.
3. Chiral Amino Acid Intermediates
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine functions as a chiral amino acid intermediate for stereocontrolled synthesis of L-ornithine derivatives and peptide-like building blocks. The L-configuration at the α-carbon provides a defined stereochemical starting point for downstream coupling and for constructing chiral amide linkages that preserve stereochemical integrity through synthetic sequences. The combination of Nα-Boc protection and δ-side-chain masking supports orthogonal manipulation, allowing selective deprotection or transformation of one functional region while retaining the other during multi-step routes. The compound's protected framework can be employed in fine chemical synthesis to prepare labeled or derivatized ornithine analogs, including intermediates used for combinatorial library generation and stereochemically defined SAR studies.
4. Chemical Biology Probes
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine can be applied in chemical biology research to create ornithine-containing probes and functionalized peptide analogs for studying biomolecular recognition. The amino acid backbone provides a recognizable structural element for incorporation into peptide conjugates, while the δ-side-chain substitution enables controlled introduction of reactive or binding-modulating features that can be revealed or further functionalized after conjugation. The Boc-protected α-amino group supports synthetic assembly of probe scaffolds with defined N-terminus chemistry, including compatibility with standard peptide coupling strategies used to attach probes to targeting motifs. The downstream products derived from this intermediate can support investigations of receptor-ligand interactions, enzyme substrate specificity, and biomolecule labeling workflows where stereochemical consistency and chemoselective side-chain behavior are required.
5. Pharmaceutical Intermediate Preparation
N-α-Boc-N-δ-1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl-L-ornithine is suitable for pharmaceutical intermediate preparation within industrial fine chemical synthesis and process chemistry contexts. The protected amino acid architecture, featuring an Nα-Boc group and a masked δ-amino functionality, aligns with manufacturing needs for isolable intermediates that tolerate activation chemistry for amide bond formation. The carbonyl-rich substituent on the δ-side chain can be leveraged as a controllable functional element during route design, supporting staged transformations that reduce cross-reactivity and simplify purification strategies in multi-step sequences. The compound can be converted into ornithine-derived fragments for peptidomimetic or peptide-like intermediates, supporting downstream synthesis of complex nitrogen-containing scaffolds used in applied product development chemistry.
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