Journal of the American Chemical Society p. 4222 - 4223 (2002)
Update date:2022-08-30
Topics:
Terao, Jun
Watanabe, Hideyuki
Ikumi, Aki
Kuniyasu, Hitoshi
Kambe, Nobuaki
A new method for the cross-coupling reaction of Grignard reagents with alkyl chlorides, bromides, and tosylates has been developed by the use of a nickel catalyst in the presence of a diene as an additive. This reaction proceeds efficiently at 0-25 °C in THF using primary and secondary alkyl and aryl Grignard reagents. Nickel complexes bearing no phosphine ligands, such as NiCl2, Ni(acac)2, and Ni(COD)2, afford the coupling products in good yields, whereas NiCl2(PPh3)2 and NiCl2(dppp) were less effective. 1,3-Butadiene shows the highest activity as an additive for the present coupling reaction. A plausible reaction pathway was proposed. Copyright
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