1: 63 percent / NaHCO3 / dimethylformamide / 20 h / 90 °C 2: 1) Mg / 1) Et2O, toluene, 2) toluene, 2 h, reflux 3: KOH / bis-(2-hydroxy-ethyl) ether / 1.5 h / 210 °C View Scheme

1: 63 percent / NaHCO3 / dimethylformamide / 20 h / 90 °C 2: 1) Mg / 1) Et2O, toluene, 2) toluene, reflux 3: KOH / bis-(2-hydroxy-ethyl) ether / 1.5 h / 210 °C View Scheme