1: 92 percent / diisobutylaluminium hydride / toluene / 2 h / 45 °C 2: 97 percent / hydrazine monohydrate, potassium hydroxide / bis-(2-hydroxy-ethyl) ether / 1.) 80 deg C, 1 h, 2.) reflux, 2 h 3: 88 percent / acetic anhydride / 2 h / Heating View Scheme