Propargyl-PEG4-beta-D-glucose | CAS 1397682-63-1

Propargyl-PEG4-beta-D-glucose is a PEGylated, carbohydrate-functionalized propargyl ether designed for copper-free or copper-catalyzed click chemistry workflows, enabling rapid attachment of a defined glycan handle to diverse biomolecules and materials. The reagent combines a terminal alkyne for click conjugation with a beta-D-glucose motif that is commonly used to introduce sugar recognition features, improve solubility, and tune hydrophilicity through a flexible PEG4 spacer. As a result, it is widely used in glyco-bioorthogonal labeling, surface functionalization, and the construction of carbohydrate-decorated probes and materials for research-grade molecular imaging and diagnostics development.

1. Glycan-Decorated Probe Labeling

Propargyl-PEG4-beta-D-glucose is used to build carbohydrate-bearing molecular probes for glycan-focused chemical biology workflows, where a glucose motif provides a recognizable sugar element for downstream assay design. Researchers incorporate the propargyl handle to generate defined conjugates with azide-functional dyes, affinity tags, or imaging scaffolds, supporting consistent probe architecture and improved aqueous compatibility via the PEG4 spacer. This approach is particularly common in experiments that require controlled multivalent presentation of sugar units on otherwise non-glycosylated reporters, such as fluorescent or luminescent readouts.

2. Cell Surface Glycomimetic Materials

Propargyl-PEG4-beta-D-glucose is a practical building block for creating glucose-functionalized biomaterials and surfaces intended for cell-interaction studies and glycomimetic engineering. The terminal alkyne enables click-based coupling to azide-modified polymers, hydrogels, or coating chemistries, allowing researchers to present glucose in a flexible, water-friendly format that can be patterned on substrates. PEG4 spacing helps reduce steric crowding and supports more uniform sugar presentation, which is valuable when constructing materials for receptor-binding investigations and extracellular matrix mimicry.

3. Imaging and Diagnostic Reagent Platforms

Propargyl-PEG4-beta-D-glucose is frequently selected for assembling sugar-functional imaging and diagnostic reagent platforms where click conjugation is used to attach the glucose-bearing ligand to reporter systems. By reacting the propargyl group with azide-containing imaging moieties or diagnostic tags, teams can generate modular conjugates with consistent glycan positioning and improved solubility relative to non-PEGylated sugar derivatives. This modularity supports rapid iteration of probe formats, including conjugates designed for fluorescence-based detection, luminescence readouts, and other research imaging modalities that benefit from carbohydrate-decorated surfaces or probes.

4. Multivalent Sugar Conjugate Libraries

Propargyl-PEG4-beta-D-glucose is well suited for producing multivalent sugar conjugate libraries used in screening and structure–function studies in chemical biology and molecular diagnostics research. Click-compatible coupling to azide-functional scaffolds enables systematic variation of sugar density and conjugate architecture, while the PEG4 linker provides a tunable spacing element that can influence accessibility of the glucose motif. Such libraries are commonly leveraged to compare how glycan presentation affects binding behavior of carbohydrate-interacting proteins, lectin-like targets, and engineered recognition systems, supporting rational design of glycan-based research reagents.