hydrogenchloride; diphenyl phosphoryl azide; triethylamine 1) dioxan, RT, 1 h, 2.) reflux, 15 min; Yield given. Multistep reaction;

lithium aluminium tetrahydride in tetrahydrofuran 1a) 0 deg C to room temperature, 30 min, 1b) room temperature, 1 h;

lithium aluminium tetrahydride in diethyl ether 2 h; Heating;

lithium aluminium tetrahydride in diethyl ether 2 h; Heating;

1: 75 percent / LiAlH4 / diethyl ether / 2 h / Heating 2: 80 percent / ethanol / 4 h / Irradiation 3: 95 percent / CBr4, Ph3P / diethyl ether / 1.) room temp., overnight; 2.) reflux, 2 h 4: 27 percent / t-BuOK / dimethylsulfoxide; pentane / 0.08 h / 20 °C View Scheme