All DMAC-TRZ derivatives were assessed in the substrate scope, except for OMePh-DMAC-TRZ, which was not tolerant to air under the reaction conditions, and the performance was cross compared with 4CzIPN and PTH. The dehalogenation of aryl bromides and chlorides bearing EWGs, (Ered = -1.88 V --2.04 V vs SCE, Figure ), was first considered.