lithium aluminium tetrahydride in tetrahydrofuran 1.) room temp., 4 h; 2.) reflux, 1 h;

1: 72 percent / LiAlH4 / tetrahydrofuran / 1.) room temp., 4 h; 2.) reflux, 1 h 2: 4 g / hydrogen bromide / acetic acid / 21 h / 60 °C 3: 98percent lithium hydride, LiAlH4 / tetrahydrofuran / 1.) room temp., 10 h; 2.) 60 deg C, 1 h View Scheme