Abstract
Cu-catalyzed azide-alkyne cycloaddition has been developed as a new, simple, efficient, and generally applicable synthetic strategy, known as ‘Click Chemistry’. The reaction utilizes two bioorthogonal functional groups, azide and alkyne, which can be readily incorporated into biological molecules with straightforward chemical modification. The reaction can be performed in low substrate concentration under a wide range of conditions including aqueous physiological conditions, which finds a span of application ranging from material science, chemical biology/bio-conjugation, and pharmaceutical research and development. In this review, we focused on the new progress in developing the metal catalyzed, bioorthogonal azide-alkyne cycloaddition reaction (‘Click chemistry’) about catalyst species, the ligands and substrates and its application in the bio-imaging field from four aspects: (a) labeling of live cell surface; (b) imaging small molecules inside of living cells; (c) modifying cells with nanomaterials; and (d) vivo imaging.
Keywords: Click chemistry, Cu(I)-catalyzed azide-alkyne 1, 3-dipolar cycloaddition (CuAAC), CuI catalyst, Molecular imaging probe, Bioorthgonal reaction
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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