PALLADIUM-COPPER CATALYZED COUPLING OF IRON SIGMA-METALLA-ALKYNES WITH ARYL HALIDES - A SIMPLE WAY TO LINK ELECTROACTIVE ORGANOIRON COMPLEXES WITH AROMATIC STRUCTURES

In the presence of catalytic amounts of bis(triphenylphosphine)dichlor opalladium(II) [(Ph3P)(2)PdCl2] and copper iodide (CuI) in di-iso-prop ylamine, the terminal iron acetylide complex 1 [(Cp)(dppe)Fe(C=CH)] ( dppe = 1,2-bis(diphenylphosphino)ethane) can be coupled with various p ara- or meta-substituted aryl bromides or iodides 2a-g to give the cor responding functionalized complexes 3a-g [(Cp)(dppe)Fe(C=C-C6H4-G)] w ith fair yields (G = NO2, CN, H, Br, Bu-t, OMe). (C) 1997 Elsevier Sci ence S.A.