1: 1) NaH / 1) DMF, 0 to 20 deg C, 2) DMF, 0 to 20 deg C 2: 80 percent / diphenyl ether / 1 h / Heating 3: 65 percent / RuCl3*3H2O, NaIO4 / acetonitrile; CCl4; H2O / Ambient temperature 4: 97 percent / hydrogen / Pd(OH)2/C / H2O; acetic acid / 45 h / Ambient temperature View Scheme