N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine is a hydrophobic dipeptide featuring Cbz protection that stabilizes the N-terminus. The residue pairing encourages β-sheet-like tendencies and promotes hydrophobic packing. Researchers use it to study aggregation behavior, enzymatic recognition, and structural transitions. Its protection provides synthetic control.
CAT No: R2271
CAS No:7801-71-0
Synonyms/Alias:Z-LEU-LEU-OH;7801-71-0;(S)-2-((S)-2-(((Benzyloxy)carbonyl)amino)-4-methylpentanamido)-4-methylpentanoic acid;CHEMBL203568;(2S)-4-methyl-2-[[(2S)-4-methyl-2-(phenylmethoxycarbonylamino)pentanoyl]amino]pentanoic acid;N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine;N-[(Phenylmethoxy)carbonyl]-L-leucyl-L-leucine;MFCD00038296;N-Cbz-L-Leu-L-Leu-OH;N-Cbz-L-leucinyl-L-leucine;SCHEMBL4872585;BDBM50179750;AKOS016014308;N-Benzyloxycarbonyl-L-leucyl-L-leucine;AS-56436;NS00046929;G77533;(S)-2-((S)-2-(benzyloxycarbonyl)-4-methylpentanamido)-4-methylpentanoic acid;(S)-2-((S)-2-(benzyloxycarbonylamino)-4-methylpentanamido)-4-methylpentanoic acid;
N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine, also recognized as Z-Leu-Leu-OH, is a synthetic dipeptide featuring two leucine residues protected by a benzyloxycarbonyl (Z or Cbz) group at the N-terminus. This compound is widely valued in biochemical research for its stability, hydrophobic character, and unique structural properties. The presence of the Z-protecting group allows for selective manipulation during peptide synthesis, making it a versatile intermediate in the assembly of more complex peptide sequences. Its robust peptide bond and resistance to nonspecific enzymatic degradation enable its use in a variety of laboratory applications, particularly where controlled hydrolysis or protease activity is of interest. Researchers appreciate its defined stereochemistry and compatibility with diverse analytical and preparative techniques, which facilitate studies in enzymology, medicinal chemistry, and molecular biology.
Peptide Synthesis: In peptide chemistry, Z-Leu-Leu-OH plays a pivotal role as a protected dipeptide building block. The benzyloxycarbonyl group shields the N-terminus from undesired reactions, allowing chemists to elongate peptide chains selectively at the C-terminus. This protection strategy is essential for stepwise solid-phase or solution-phase peptide synthesis, where specific sequence fidelity and minimized side reactions are crucial. By integrating this dipeptide into larger peptide constructs, researchers can efficiently incorporate two consecutive leucine residues while maintaining control over the overall sequence assembly. Its use streamlines synthetic protocols, reduces byproduct formation, and enhances the purity of the final peptide products.
Enzyme Substrate Studies: As a model substrate, N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine is frequently employed in enzymatic assays to investigate the specificity and kinetics of proteases, particularly those that recognize hydrophobic residues. The Z-protected dipeptide structure provides a defined platform for studying cleavage patterns and catalytic mechanisms of serine and cysteine proteases. By monitoring the hydrolysis of this substrate, scientists can elucidate enzyme preferences, determine inhibitor efficacy, and screen for novel proteolytic activities. The compound's stability under assay conditions ensures reproducible results and facilitates the development of robust enzyme activity assays.
Protease Inhibitor Screening: In the search for new protease inhibitors, Z-Leu-Leu-OH serves as a valuable reference substrate. Its defined structure and susceptibility to cleavage by specific proteases make it ideal for high-throughput screening platforms. Researchers can assess the inhibitory potency of candidate molecules by measuring their ability to prevent the hydrolysis of this dipeptide. This approach supports the identification and optimization of lead compounds for further development in therapeutic or agricultural contexts, where modulation of protease activity is desirable.
Structural Biology: The defined stereochemistry and rigidity of N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine render it useful in structural biology studies. Crystallographers and spectroscopists utilize it to probe peptide-protein interactions, map binding sites, and elucidate conformational dynamics. Its incorporation into model systems enables the dissection of hydrophobic interactions and the role of leucine-rich motifs in protein folding and stability. The compound's compatibility with NMR and X-ray crystallography further enhances its utility in detailed structural analyses.
Peptide Drug Design: In medicinal chemistry, Z-Leu-Leu-OH is often integrated into the design and synthesis of peptide-based drug candidates. Its hydrophobic dipeptide motif mimics structural elements found in biologically active peptides, allowing medicinal chemists to explore structure-activity relationships and optimize binding affinities for target proteins. The Z-protecting group can be selectively removed under mild conditions, enabling subsequent functionalization or conjugation with bioactive moieties. By leveraging the unique properties of this compound, researchers can develop novel peptide analogs with improved stability, bioavailability, or target selectivity, advancing the field of peptide therapeutics.
Analytical Method Development: In analytical chemistry, N-((Phenylmethoxy)carbonyl)-L-leucyl-L-leucine finds application as a calibration standard or reference compound in chromatographic and spectrometric methods. Its well-defined structure and physicochemical properties facilitate the validation of analytical techniques, such as HPLC or mass spectrometry, which are essential for the accurate quantification and identification of peptides in complex biological samples. By serving as a benchmark in method development and quality control, this compound supports reliable peptide analysis across research and industrial laboratories.
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