1: 1.) n-BuLi / 1.) -30 deg C, 1.5 h; 2.) -78 deg C, 4 h 2: 25 percent / AgNO3, N-chlorosuccinimide / acetonitrile; H2O View Scheme

1.1: n-BuLi / tetrahydrofuran; hexane 1.2: tetrahydrofuran; hexane / 20 °C 2.1: N-chlorosuccinimide; aq. silver nitrate / acetonitrile / 20 °C 3.1: 76 percent / Me3SiCl; CuCl2 / [PdCl2(CH3CN)2] / dioxane / 12 h / 70 °C View Scheme