1: 1.) NaH / 1.) DMF, 60 deg C, 1 h, 2.) DMF, 1 h 2: ammonium formate, formic acid, formamide / 2 h / 120 °C 3: 85 percent / H2 / 10percent Pd/C / ethyl acetate; ethanol / 3 h 4: 99 percent / CHCl3 / 12 h / Heating View Scheme