Rh-Catalyzed Carboxylates Directed C-H Activation for the Synthesis of <i>ortho</i>
-Carboxylic 2-Arylethenesulfonyl Fluorides: Access to Unique Electrophiles for SuFEx Click Chemistry
A carboxylic ester directed monoselective coupling of sp2 C–H bonds with ethenesulfonyl fluoride (ESF) was achieved by using a RhIII catalyst. This protocol gives access to a class of ortho‐carboxylic‐functionalized 2‐arylethenesulfonyl fluorides. The versatile and unique properties of carboxylic groups will significantly improve the capability of using 2‐arylethenesulfonyl fluorides as covalent probes