1: NaH, 18-crown-6 / 1.) toluene, r.t., 1 h, 2.) toluene, reflux, 24 h 2: 15percent aq. NaOH / 40 h / Heating 3: 85 percent / KOH, hydrazine hydrate / bis-(2-hydroxy-ethyl) ether / 1.) 140 deg C, 2.) 190-200 deg C, 5 h View Scheme

1: NaH, 18-crown-6 / 1.) toluene, r.t., 1 h, 2.) toluene, reflux, 24 h 2: 15percent aq. NaOH / 40 h / Heating View Scheme