Dehalogenation of aryl halides was efficiently performed in refluxing THF using a catalytic combination composed of Ni(0)/ N -heterocyclic carbene (NHC)/ β -hydrogen-containing alkoxide. IMes·HCl (1,3-bis(2,4,6-trimethylphenyl)imidazolium chloride) and Ni(acac) 2 used respectively as carbene and Ni(0) precursors associated to in situ generated i -PrONa were found to be the most effective for the dehalogenation of functionalized aryl chlorides, bromides, iodides, and polyhalogenated hydrocarbons.
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Desmarets et al. (2002) studied this question.
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