lithium bromide in acetone 16 h; Heating; Yield given;

1: Et3N / CH2Cl2 / 1.) ice-bath, 10 min, 2.) gradually warming to room temperature, 30 min 2: LiBr / acetone / 16 h / Heating View Scheme

1: 80 percent / LiAlH4 / diethyl ether / 5 h / Heating 2: Et3N / CH2Cl2 / 1.) ice-bath, 10 min, 2.) gradually warming to room temperature, 30 min 3: LiBr / acetone / 16 h / Heating View Scheme