1: 71.8 percent / aq. H2SO4 / 5 h / Heating 2: 94.7 percent / thionyl chloride / benzene 3: 94.7 percent / SnCl4 / benzene 4: 99.3 percent / NaBH4 / methanol 5: 89.9 percent / KHSO4 6: H2 / 5percent Pd-C / 5 h / 230 °C View Scheme