Ni(0)-Trialkylphosphine Complexes. Efficient Homo-coupling Catalyst for Aryl, Alkenyl, and Heteroaromatic Halides

Bis(trialkylphosphine)nickel(0) generated in situ from bis(trialkylphosphine)nickel(II) chloride was found to be an effective catalyst for a homo-coupling of aryl, alkenyl, or heteroaromatic halides with zinc powder. The catalytic reaction proceeded very well in NMP or HMPA solvent under mild conditions to afford dehalogenative-coupling products in good yields.

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