1.1: CHCl3 / 17 h / 20 °C 1.2: 53 percent / triethylamine / CHCl3 / 0.58 h / 20 °C 2.1: 25 percent / LDA / tetrahydrofuran / 1.5 h / -78 °C View Scheme

dimethylphenylsilane; C19H8O7Ru3 in 1,4-dioxane T=20°C; 1 h; Inert atmosphere;