Our report describes the facile and scalable preparation of 9-thioxanthen-9-one 10,10-dioxides via Pd-catalyzed sulfonylative homocoupling of the appropriately substituted benzophenones. This transformation provides a straightforward route to previously unreported sulfone-fluoresceins and -fluorones. Several examples of these red fluorescent dyes have been prepared, characterized, and evaluated as live-cell permeant labels compatible with super-resolution fluorescence microscopy with 775 nm stimulated emission depletion.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10845149 | PMC |
| http://dx.doi.org/10.1021/acs.orglett.3c04300 | DOI Listing |
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