1: 96 percent / LiAlH4 / diethyl ether / 3 h / Heating 2: pyridine / 1.) 1 h, 0 deg C; 2.) 4.5 h, 20 deg C 3: LiBr / acetone / 20 °C 4: 1.) Mg / 1.) diethyl ether View Scheme

sodium hydroxide in methanol

lithium aluminium tetrahydride in diethyl ether 3 h; Heating;