Pd(II)-Catalyzed ortho-trifluoromethylation of arenes using TFA as a promoter
"Chemical equation presented" A Pd(II)-catalyzed C-H activation/trifluoromethylation of arenes with an electrophilic trifluoromethylation reagent using diverse heterocycle directing groups is reported. The presence of trifluoroacetic acid is crucial for this catalytic reaction.