water; platinum (II) chloride in 1,4-dioxane T=100°C; 24 h;

1.1: n-BuLi / tetrahydrofuran; hexane / 0.5 h / -78 °C 1.2: 96 percent / I2 / tetrahydrofuran; hexane / 2 h 2.1: n-BuLi / tetrahydrofuran; hexane / 0.5 h / -20 °C 2.2: ZnCl2 / tetrahydrofuran; hexane / 0.5 h / 0 °C 2.3: 61 percent / Pd(PPh3)4 / tetrahydrofuran; hexane / 6 h / 60 °C 3.1: 3 percent / water / PtCl2 / dioxane / 24 h / 100 °C View Scheme