DBCO-acid | CAS 1353016-70-2

DBCO-acid is a strained cyclooctyne building block designed for copper-free click chemistry, providing a reactive DBCO (dibenzocyclooctyne) handle that couples efficiently with azide-functional partners under mild conditions. As a carboxylic acid derivative, it is commonly used to introduce a DBCO moiety into linkers, surfaces, and biomolecule conjugates while retaining a functional group for further coupling or material attachment. This reagent is widely relevant to chemical biology workflows where stable, orthogonal conjugation is needed for probe, imaging, and materials fabrication.

1. Bioconjugation With Azides

DBCO-acid is frequently used to generate azide-reactive conjugates for research-grade labeling of biomolecules and biomolecule-derived constructs. The DBCO cyclooctyne enables copper-free strain-promoted azide–alkyne cycloaddition (SPAAC) with azide-bearing targets such as peptides, proteins, glycans, and nucleic-acid analogs, supporting workflows that benefit from avoiding copper-related effects on sensitive biomaterials. The carboxylic acid functionality also supports downstream derivatization into defined linkers, improving how conjugates are presented to cells, enzymes, or binding reagents in assay development and molecular biology toolkits.

2. Surface And Material Functionalization

DBCO-acid is commonly incorporated into surface modification strategies and polymer or hydrogel functionalization schemes where azide groups are presented on the material scaffold. Researchers use this reagent to install DBCO moieties onto coatings, nanoparticles, and macromolecular matrices so that subsequent azide-click steps can attach fluorescent tags, affinity ligands, or other functional components with minimal processing. The acid group facilitates coupling to activated surfaces or incorporation into material chemistries, making DBCO-acid a practical choice for building multicomponent materials used in imaging assays, biosensing platforms, and spatially organized chemical libraries.

3. Fluorescent Probe And Imaging Labeling

DBCO-acid is widely used as a DBCO source for preparing azide-reactive fluorescent probes and imaging reagents in chemical biology and molecular imaging research. By converting the acid into an appropriate linker format, the DBCO handle can be positioned to attach dyes, imaging reporters, or imaging-compatible tags to azide-functional biomolecules and probe scaffolds. This approach is especially useful when probe assembly must proceed under conditions compatible with labeled biomaterials, enabling modular construction of imaging reagents for microscopy, flow-based readouts, and platform screening.

4. Diagnostic Reagent Development

DBCO-acid is applied in the development of diagnostic and assay reagents that rely on modular conjugation to azide-functional capture elements, reporters, or assay components. In many research and industrial settings, DBCO-acid-derived linkers are used to prepare conjugates where a DBCO-bearing reagent can be clicked onto azide-tagged surfaces, beads, or assay reagents to assemble multiplexed detection formats. The carboxylic acid functionality supports integration into linker architectures used to control attachment geometry, which is valuable for building consistent reagent batches for assay prototyping and reagent kit workflows.