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Membrane‐Permeant, Bioactivatable Coumarin Derivatives for In‐Cell Labelling

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The delivery of small molecule fluorophores with minimal compartmentalization is currently one of the most critical technical problems in intracellular labelling. Here we introduce sulfonated and phosphonated coumarin dyes, demonstrate… Click to show full abstract

The delivery of small molecule fluorophores with minimal compartmentalization is currently one of the most critical technical problems in intracellular labelling. Here we introduce sulfonated and phosphonated coumarin dyes, demonstrate rapid cell entry via a prodrug approach, and show a lack of interaction with membranes, organelles, or other compartments. The dyes show no specific localization and are evenly distributed in the cells. Our fluorogenic, clickable phosphonate derivatives successfully tagged model targets in intact cells and the increase in brightness upon click reaction was around 60‐fold.

Keywords: derivatives cell; membrane permeant; cell labelling; coumarin derivatives; permeant bioactivatable; bioactivatable coumarin

Journal Title: Chembiochem
Year Published: 2022

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