1: LiBr / acetone / 5 h / Heating 3: KOH / ethanol; H2O / 5 h / Heating 4: 74 percent / N2H4*H2O, KOH / bis-(2-hydroxy-ethyl) ether; methanol / 125 deg C, 6 h; 195 deg C, 3 h View Scheme

lithium bromide in acetone 5 h; Heating; Yield given;