We report the synthesis and use of sydnone-based profluorophores as tools for imaging applications. These new probes display exquisite reactivity towards strain promoted cycloaddition reactions with cycloalkynes allowing fast, efficient and selective labeling in biological media. Styryl-pyridinium sydnone probes were found particularly interesting for click reactions to proceed selectively inside cells.
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| http://dx.doi.org/10.1039/c9cc01458f | DOI Listing |
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