iodine in dichloromethane further reagent: NaI;

triethylamine in acetonitrile 24 h;

2: 95 percent / imidazole / dimethylformamide / 0.08 h 3: 72 percent / Br2 / CH2Cl2 / 0.17 h 4: 54 percent / tBuLi, NIS / tetrahydrofuran; pentane / 0.33 h / -78 °C 5: 85 percent / Bu4NF / tetrahydrofuran / 0.05 h 6: 88 percent / diisopropylethylamine / CH2Cl2 / 0.5 h / Ambient temperature 7: 40 percent / NEt3 / acetonitrile / 24 h View Scheme

1: 89 percent / iPr2NEt / benzene / 2 h / 0 °C 3: 95 percent / imidazole / dimethylformamide / 0.08 h 4: 72 percent / Br2 / CH2Cl2 / 0.17 h 5: 54 percent / tBuLi, NIS / tetrahydrofuran; pentane / 0.33 h / -78 °C 6: 85 percent / Bu4NF / tetrahydrofuran / 0.05 h 7: 88 percent / diisopropylethylamine / CH2Cl2 / 0.5 h / Ambient temperature 8: 40 percent / NEt3 / acetonitrile / 24 h View Scheme

1: 85 percent / Bu4NF / tetrahydrofuran / 0.05 h 2: 88 percent / diisopropylethylamine / CH2Cl2 / 0.5 h / Ambient temperature 3: 40 percent / NEt3 / acetonitrile / 24 h View Scheme

1: 75 percent / I2 / CH2Cl2; tetrahydrofuran / 0.08 h 2: 85 percent / Bu4NF / tetrahydrofuran / 0.05 h 3: 88 percent / diisopropylethylamine / CH2Cl2 / 0.5 h / Ambient temperature 4: 40 percent / NEt3 / acetonitrile / 24 h View Scheme