Abstract

Under mild conditions, the copper(I) complex [Cu I(TMPA)CH 3CN]PF 6 (TMPA=tris(2-pyridyl-methyl)amine), reacts stoichiometrically with benzyl and allyl halides, and α-halo-ketones to produce near quantitative yields of carbon-carbon reductively coupled products bibenzyls, diolefins or diketones, respectively. The copper complex acts as the halide acceptor and the copper(II) complex [Cu II(TMPA)X]PF 6 (XCl − or Br −) is also isolated. No firm mechanistic conclusions can be drawn, but the intermediacy of oxidatively added RX products, i.e. organo-Cu(II) or Cu(III), is suggested.

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