trichlorophosphate 25 h; Ambient temperature;

1: 68 percent / NBS, azobisisobutyronitrile / CCl4 / Heating 2: 89 percent / CHCl3 / 20 h / Ambient temperature 3: 86 percent / KOtBu / dimethylformamide / 5 h / 120 °C 4: 92 percent / POCl3 / 25 h / Ambient temperature View Scheme

1: 89 percent / CHCl3 / 20 h / Ambient temperature 2: 86 percent / KOtBu / dimethylformamide / 5 h / 120 °C 3: 92 percent / POCl3 / 25 h / Ambient temperature View Scheme

1: 78 percent / 3 h / 185 °C 2: 68 percent / NBS, azobisisobutyronitrile / CCl4 / Heating 3: 89 percent / CHCl3 / 20 h / Ambient temperature 4: 86 percent / KOtBu / dimethylformamide / 5 h / 120 °C 5: 92 percent / POCl3 / 25 h / Ambient temperature View Scheme

1: 86 percent / KOtBu / dimethylformamide / 5 h / 120 °C 2: 92 percent / POCl3 / 25 h / Ambient temperature View Scheme

1: LiBH4 / tetrahydrofuran 2: 69 percent View Scheme