inexpensive and atom‐economical approach to CH bond functionalization, a cationic CoIII complex (see scheme) was used to generate nucleophilic organometallic species in situ without additional activating reagents. Under these conditions, aryl CH bonds underwent efficient addition to polar electrophiles, including α,β‐unsaturated N‐acyl pyrroles as β‐substituted ester and amide surrogates.