1.1: NaH / dimethylformamide / 0.5 h / 0 °C 1.2: dimethylformamide / 16 h / 20 °C 2.1: LiI / dimethylformamide / 5 h / Heating 3.1: hexamethyldisilazane / CH2Cl2 / 0.67 h / 0 - 20 °C 4.1: NaI, m-CPBA / CH2Cl2; tetrahydrofuran / 0.5 h / 0 °C 5.1: (Bu3Sn)2 / benzene / 1 h / Heating; irradiation 5.2: 87 percent / 2,2'-azobisisobutyronitrile, Bu3SnH / benzene / 1.5 h / Heating View Scheme

2: LiI 3: 315 °C View Scheme