Abstract
AbstractRhodium‐catalyzed addition/elimination of arylaluminum reagents with vinylarenes was achieved to obtain stilbene derivatives. The reaction of diethyl(phenyl)aluminum with styrene in the presence of the chloro(1,5‐cyclooctadiene)rhodium(I) dimer, [RhCl(cod)]2, and diisopropyl ketone (2,4‐dimethyl‐3‐pentanone) as an additive occurred to give (E)‐stilbene in quantitative yield. The use of other arylaluminum reagents afforded β‐arylated products in good to excellent yields. This reaction was found to be promoted by ketones as additives, which are reduced to the corresponding alcohols, as confirmed by analysis of the crude reaction mixture by 1H NMR spectroscopy.
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