thionyl chloride 2 h; Ambient temperature;

1: LiAlH4, sodium sulfate / tetrahydrofuran 2: 95 percent / thionyl chloride / 2 h / Ambient temperature View Scheme

1: 1.) LiAlH4, sodium sulfate / 1.) THF, 0 deg C, 15 min; 2.) reflux, 12 h, THF 2: 95 percent / thionyl chloride / 2 h / Ambient temperature View Scheme