barium dihydroxide

1: sodium / methanol / 18 h 2: 89 percent / 50percent sodium hydride / tetrahydrofuran / 1 h / Ambient temperature 3: 80 percent / boron trifluoride etherate / CH2Cl2 / 2 h / Ambient temperature 4: 1.)sodium hydride / 1.) THF, 1 h, 2.) RT, 24 h 5: 96 percent / α,α-azobisisobutyronitrile, tributyltin hydride / toluene / 18 h / Heating 6: red mercuric oxide, boron trifluoride / acetone; H2O; tetrahydrofuran / 20 h 7: 80 percent / benzene / 10 h / Heating 8: 90 percent / H2 / W2 Raney nickel / ethanol / 18 h / Ambient temperature 9: Et3N / CH2Cl2 / 4 h / 0 °C 10: 70 percent / sodium sulfide nonahydrate, sulfur / dimethylformamide / 24 h / 90 °C 11: 75 percent / 1.) 0.1M potassium hydroxide, 2.) 5M HCl / ethanol / 24 h / Ambient temperature View Scheme