1: 80 percent / 1.) sodium borohydride, boron trifluoride etherate, 2.)H2O, NaOH; 30percent H2O2 / 1.) THF, room temperature, 3 h, 2.) overnight 2: Jones reagent / acetone / 2 h / Ambient temperature 3: diethyl ether 4: 38 percent / sodium / toluene / 5 h / Heating 5: HCl / tetrahydrofuran / 10 h / Ambient temperature 6: zinc dust, acetic acid, HCl / 75 - 80 °C 7: KOH, hydrazine hydrate / bis-(2-hydroxy-ethyl) ether / 1.) reflux, 2 h, 2.) 210 deg C, 2 h View Scheme