Boc-L-Leu-CHN2 is a Boc-protected L-leucine derivative bearing a diazomethyl (CHN2) functional group on the side chain, classifying it as a modified amino acid suitable for peptide-related synthesis. The molecule contains a Boc-protected amino functionality and a free carboxyl group, with the diazomethyl substituent providing a chemically reactive handle while the leucine backbone retains the hydrophobic isobutyl side-chain character associated with leucine-derived residues. In synthetic chemistry workflows, it is employed as a protected amino acid building block for stepwise incorporation of the diazomethyl functionality into peptides or peptide-like structures, enabling access to further derivatization or labeling strategies through the diazomethyl group.
CAT No: CP25874
CAS No:52716-48-0
Synonyms/Alias:Boc-L-Leu-CHN2;CTK8F8290;ZINC101016389;N-[(1S)-1-(Diazoacetyl)-3-methylbutyl]carbamicacidtert-butylester;52716-48-0
Chemical Name:N-alpha-t-Butyloxycarbonyl-L-leucinyl-diazomethane, (S)-3-Boc-amino-1-diazo-5-methyl-2-hexanone
Boc-L-Leu-CHN2 is a Boc-protected L-leucine derivative bearing a diazomethyl (CHN2) functionality, combining a protected amino acid backbone with a reactive diazo group that is commonly leveraged as a synthetic handle in downstream transformations. This structure supports preparation of leucine-containing intermediates where controlled introduction of a diazo-derived functionality is required, while the Boc group provides stability during handling and coupling-oriented steps in peptide and intermediate workflows.
1. Diazo-Intermediate Synthesis
Boc-L-Leu-CHN2 is used by synthetic chemistry teams developing leucine-based diazo intermediates for subsequent functionalization, including conversion into carbonyl or substituted methylene motifs via diazo chemistry. The Boc protection helps maintain the amino acid stereochemical integrity and suppresses undesired side reactions during intermediate preparation, making it a practical building block when the diazo unit must be introduced late in a sequence. Researchers in pharmaceutical intermediate development and specialty chemical manufacturing often select this format to obtain a defined leucine-derived scaffold with a single, strategically placed reactive handle.
2. Leucine-Tagged Building Blocks
Boc-L-Leu-CHN2 serves as a leucine-tagged precursor for assembling more complex amino acid derivatives used in medicinal chemistry and structure-activity relationship (SAR) studies. Teams building side-chain-modified analogs rely on the protected amino acid core to carry stereochemical information forward, while the diazomethyl group enables diversification into new substitution patterns that can be screened as part of lead optimization. Because the product is already protected at the amino terminus, it integrates cleanly into workflows where leucine-derived fragments are appended to larger scaffolds without requiring re-protection of the amine.
3. Peptide Fragment Diversification
Boc-L-Leu-CHN2 is applied in peptide fragment and modified-peptide precursor development when a diazo-derived functionality is needed to introduce a reactive or transformable moiety at a leucine position prior to final assembly. In custom peptide manufacturing research, the Boc-protected amino acid form supports stepwise construction of protected intermediates, while the diazo group provides a route to generate functionalized derivatives that can be carried into subsequent coupling or derivatization steps. This use case is particularly relevant when the target sequence or conjugate requires a leucine-based modification that is most conveniently installed through diazo chemistry rather than through direct side-chain functional group manipulation.
4. Labeled/Derivatization Workflow Support
Boc-L-Leu-CHN2 is also used in analytical and method-development contexts where diazo-containing amino acid derivatives are required as defined standards or derivatization intermediates for downstream characterization. Chemistry groups developing LC-MS-compatible derivatization schemes may prefer a Boc-protected leucine scaffold to reduce variability associated with free amine reactivity, while the diazo functionality provides a controlled transformation point for generating detectable or separable products. This makes the reagent useful for building reproducible analytical workflows that depend on consistent intermediate formation from a leucine-derived starting material.
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