DBCO-NH-Boc | CAS 1539290-74-8

DBCO-NH-Boc is a cyclooctyne (DBCO) click chemistry reagent bearing a protected amine (Boc) that enables efficient strain-promoted azide–alkyne cycloaddition (SPAAC) under copper-free conditions. Its DBCO scaffold is widely used to label biomolecules, surfaces, and polymeric materials with high chemoselectivity toward azides, while the Boc-protected functionality supports downstream deprotection or conjugation workflows. As a result, DBCO-NH-Boc is commonly selected for building modular bioconjugates, preparing reactive intermediates for stepwise labeling, and generating functional imaging or assay-ready constructs.

1. Copper-Free Biomolecule Labeling

DBCO-NH-Boc is used in copper-free click labeling workflows where azide-bearing targets such as peptides, proteins, glycans, and nucleic-acid probes need to be modified without copper-related side reactions. The DBCO group provides rapid SPAAC reactivity for attaching the reagent to azide-functional biomolecules, while the Boc-protected amine offers a convenient handle for subsequent activation steps, such as converting the conjugate into a further reactive intermediate or enabling orthogonal coupling strategies. This makes DBCO-NH-Boc a practical choice for researchers building multi-component labeling schemes for assay development, biochemical studies, and probe optimization.

2. Stepwise Conjugate Assembly

DBCO-NH-Boc supports modular, stepwise assembly of complex conjugates because it combines a click-reactive DBCO moiety with a protected amine functionality that can be unmasked when a later stage requires additional chemistry. After SPAAC attachment to an azide-functional scaffold, deprotection of the Boc group can reveal an amine for subsequent coupling to activated esters, isothiocyanates, aldehyde-derived handles, or other electrophiles used in bioconjugation pipelines. This approach is frequently applied in platform development for molecular imaging reagents, affinity probes, and customizable reagent libraries where researchers need controlled introduction of functional groups at defined stages rather than one-pot labeling.

3. Surface and Material Functionalization

DBCO-NH-Boc is widely employed to functionalize azide-present surfaces and materials used in biomaterials research, diagnostic reagent development, and materials-based sensing. The DBCO group enables covalent attachment to azide-functional coatings, hydrogels, polymer films, and microfabricated substrates through copper-free SPAAC, yielding stable linkages suitable for downstream processing and characterization. The Boc-protected amine can further expand the range of post-functionalization chemistries, allowing material scientists to create surfaces with additional reactive sites for immobilizing capture ligands, tuning surface charge, or integrating multi-step assembly of assay components.

4. Molecular Imaging Probe Building

DBCO-NH-Boc is used as a building block for constructing azide-functional molecular imaging probes and related labeling reagents used in chemical biology workflows. Researchers typically incorporate the DBCO functionality to attach the probe scaffold to azide-bearing targeting elements or reporter constructs, while the Boc-protected amine enables later derivatization to introduce linkers, solubilizing groups, or conjugation-ready moieties required for probe format control. This reagent is therefore valuable in probe development settings where modular synthesis and orthogonal functional group management are important for generating imaging-compatible reagent variants and for systematic structure–property studies.