Synthesis of Indole‐ or Carbazole‐Tethered β‐Sulfonyl Fluorides Using Ethenesulfonyl Fluoride via Rh(III)‐Catalyzed C–H Activation

ABSTRACT An oxidant‐free Rh(III)‐catalyzed C–H activation strategy has been developed for the synthesis of indole‐ or carbazole‐tethered β‐sulfonyl fluorides, using ethenesulfonyl fluoride (ESF) as the coupling partner. The target products were obtained in good to excellent yields. Notably, the scalability and synthetic utility of this process were demonstrated through gram‐scale synthesis and further transformations.