1: 92.3 percent / Zn, AcOH / ethanol / 5 h / Heating 2: benzene / 24 h / Heating 3: NaBH4 / methanol / 1.5 h / 0 °C 4: 1) NaH / 1) DMF, 0 to 20 deg C, 2) DMF, 0 to 20 deg C 5: 80 percent / diphenyl ether / 1 h / Heating 6: 65 percent / RuCl3*3H2O, NaIO4 / acetonitrile; CCl4; H2O / Ambient temperature 7: 97 percent / hydrogen / Pd(OH)2/C / H2O; acetic acid / 45 h / Ambient temperature View Scheme