L-6-Hydroxynorleucine is a natural, non-proteinogenic amino acid characterized by a straight-chain side chain bearing a hydroxyl substituent at the 6-position relative to the amino group, with a free α-amino group and a free α-carboxyl group. The molecule contains a stereogenic center at the α-carbon consistent with the L designation and presents a side-chain alcohol functionality that can participate in hydrogen bonding and can be chemically modified (e.g., via derivatization or protection) to control reactivity during synthesis. L-6-Hydroxynorleucine is used as a defined amino acid building block for peptide and peptidomimetic synthesis and for structure-activity or labeling studies where an internal hydroxyl group on a long aliphatic chain is required.
CAT No: CP07302
L-6-Hydroxynorleucine is an L-configured, non-proteinogenic amino acid featuring a straight-chain side chain terminating in a secondary alcohol at the 6-position relative to the amino acid backbone. The molecule contains a stereogenic center at the α-carbon and a hydroxyl functional group capable of hydrogen bonding and derivatization, while the amino and carboxylic acid functionalities support standard amino acid coupling chemistry. As a chiral amino acid with an unprotected alcohol, it can participate in peptide bond formation after appropriate protection strategies, and it can undergo selective functional group transformations to generate protected or activated derivatives. The combination of a hydrophilic hydroxyl handle and a stable amino acid scaffold makes L-6-Hydroxynorleucine a practical intermediate for amino acid derivatization, peptidomimetic construction, and downstream synthetic elaboration.
1. Peptide Synthesis
L-6-Hydroxynorleucine supports peptide building block preparation for solid-phase and solution-phase peptide synthesis, where the α-amino and α-carboxyl groups enable amide bond formation. The side-chain secondary alcohol at the 6-position can be protected as an ether or ester to prevent competing reactions during coupling and deprotection sequences. Incorporation of the L-stereocenter into peptide frameworks enables stereochemically defined analogs that can be used to probe backbone/side-chain recognition and conformational effects. Downstream peptide analogs prepared from L-6-Hydroxynorleucine can serve as controlled substrates for biochemical assays and as scaffold components in peptide chemistry workflows.
2. Amino Acid Derivatization
L-6-Hydroxynorleucine is suitable for amino acid derivatization strategies that transform the free secondary alcohol into functional handles for further synthetic elaboration. The hydroxyl group can be converted into protected forms compatible with peptide coupling, or into activated intermediates that enable substitution, esterification, or ether formation without disturbing the amino acid stereochemistry. The amino acid backbone can also be manipulated through N- and C-terminal protection patterns to generate coupling-ready derivatives for protected amino acid synthesis. Resulting L-6-Hydroxynorleucine derivatives can function as biochemical research intermediates, enabling side-chain functionalization and controlled access to hydroxyl-bearing peptidomimetics.
3. Chemical Biology Probes
L-6-Hydroxynorleucine can be applied in chemical biology research where hydroxyl-bearing, stereodefined amino acid residues are incorporated into peptides or small molecules to modulate molecular recognition. The secondary alcohol provides a hydrogen-bonding motif and a site for conjugation chemistry, including formation of protected linkers or derivatized tags after orthogonal protection. The L-configuration at the α-carbon supports stereochemically defined incorporation into biomolecular scaffolds, which can be important for interpreting structure-activity relationship studies in enzyme binding or substrate recognition contexts. L-6-Hydroxynorleucine-derived constructs can therefore serve as probe components for mapping interaction surfaces and for generating defined analog libraries in biochemical research.
4. Peptidomimetics And SAR
L-6-Hydroxynorleucine is applicable to peptidomimetic construction and SAR studies through its hydroxyl-functional side chain and chiral amino acid backbone. The side-chain alcohol can be used to tune polarity, hydrogen-bond donor/acceptor patterns, and steric profile in analog design, while the amino acid core supports systematic variation of N-/C-terminal protection and coupling chemistry. Derivatives prepared from L-6-Hydroxynorleucine can be used to build constrained or substituted scaffolds, including hydroxyl-functional fragments that mimic native residue behavior. Downstream analogs can support structure-guided medicinal chemistry workflows focused on stereochemical effects and side-chain functional group contributions.
5. Process Chemistry Intermediate
L-6-Hydroxynorleucine is relevant to process chemistry intermediate preparation for fine chemical synthesis, where chiral amino acid frameworks with a single reactive alcohol handle are used to design robust manufacturing routes. The presence of an α-amino/α-carboxyl motif enables conversion into protected amino acid derivatives that are compatible with scalable peptide coupling steps and controlled deprotection logic. Secondary alcohol functionality supports orthogonal protection strategies that can be selected to withstand coupling conditions and enable predictable downstream transformations. L-6-Hydroxynorleucine-derived intermediates can therefore be employed in industrial chemical manufacturing contexts that require stereodefined building blocks for peptide analogs and hydroxyl-functional specialty chemicals.
6. Analytical Standards
L-6-Hydroxynorleucine can be utilized in analytical research as a stereodefined reference material for method development and verification in amino acid and peptide analysis. The hydroxyl-bearing side chain provides a distinct chemical signature for chromatographic separation and derivatization-based detection, while the L-configuration supports unambiguous stereochemical benchmarking. Protected derivatives and labeled analogs derived from L-6-Hydroxynorleucine can be prepared to match specific analytical workflows, including detection of peptide fragments containing hydroxyl-functional residues. L-6-Hydroxynorleucine thus functions as a chemically defined standard precursor supporting downstream analytical method validation and quality control of amino acid derivative processes.
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