triphenylphosphine; nickel dichloride; zinc in N,N-dimethyl-formamide T=50°C; 2 h;

1: 87 percent / dimethylformamide / 80 °C 2: 88 percent / NiCl2, P(Ph)3, Zn / dimethylformamide / 2 h / 50 °C View Scheme