Abstract

A novel macrocyclic bis(N-heterocyclic carbene) precursor was designed and prepared, which manifested high catalytic efficiency when combining Pd(OAc)2 in hydrodehalogenation of aryl halides. The generation of a little amount of the intermediate product chlorobenzene is closely related with the synergistic effect of two imidazoline protons lying on the two opposite sides of the macrocycle.

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