1: 90 percent / Na2S2O4, Na2CO3 / H2O / 0.5 h / Heating 2: 70 percent / 1 h 3: 82 percent / anhyd. NaOAc / 1 h / Heating 4: 68 percent / 10percent NaOH / H2O / 1 h / Heating 5: 90 percent / NaBH4 / ethanol / 1 h / Heating 6: 88 percent / conc. HCl / aq. ethanol / 3 h / Heating View Scheme

1: SOCl2, pyridine / benzene / Heating 2: Cl2 / CCl4 3: 28percent aq. NH3 View Scheme

1: 90 percent / Na2S2O4, Na2CO3 / H2O / 0.5 h / Heating 2: 70 percent / 1 h 3: 82 percent / anhyd. NaOAc / 1 h / Heating 4: 68 percent / 10percent NaOH / H2O / 1 h / Heating View Scheme