1: 57 percent / K2CO3; H2O / methanol / 3 h / Heating 2: 77 percent / LiHMDS / tetrahydrofuran / -78 - 20 °C 3: 65 percent / NBS; benzoyl peroxide / CCl4 / Heating View Scheme

1: 57 percent / K2CO3; H2O / methanol / 3 h / Heating 2: 77 percent / LiHMDS / tetrahydrofuran / -78 - 20 °C View Scheme

water; potassium carbonate in methanol 3 h; Heating;