1: 92 percent / NaH / tetrahydrofuran / 3 h / Ambient temperature 2: 85 percent / H2 / PtO2 / ethyl acetate / 5 h / Ambient temperature 3: 66 percent / NaH / dimethylformamide / 3 h / Ambient temperature 4: NaH / dimethylformamide / 3 h / Ambient temperature 5: satd. aq. Na2S2O4 6: 88 percent / K2CO3 / acetone / 6 h / 45 °C 7: 72 percent / CF3COOH / CH2Cl2 / 8 h View Scheme