Multi-step reaction with 4 steps 1: 86 percent / 1percent aq. KOH / 15 h / Ambient temperature2: 85 percent / 1 N H2SO4, FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 4 h / Ambient temperature3: 82 percent / 6 N HCl / 6 h / Heating4: 53 percent / 0.2 N NaOH, NaBH4 / 1 h / Ambient temperature  

Multi-step reaction with 5 steps 1: NaSH / H2O / 2 h / Heating2: 86 percent / 1percent aq. KOH / 15 h / Ambient temperature3: 85 percent / 1 N H2SO4, FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 4 h / Ambient temperature4: 82 percent / 6 N HCl / 6 h / Heating5: 53 percent / 0.2 N NaOH, NaBH4 / 1 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 85 percent / 1 N H2SO4, FeSO4*7H2O, tert-butyl hydroperoxide / acetic acid; H2O / 4 h / Ambient temperature2: 82 percent / 6 N HCl / 6 h / Heating3: 53 percent / 0.2 N NaOH, NaBH4 / 1 h / Ambient temperature  

Multi-step reaction with 2 steps 1: 82 percent / 6 N HCl / 6 h / Heating2: 53 percent / 0.2 N NaOH, NaBH4 / 1 h / Ambient temperature  

With  sodium hydroxide; sodium tetrahydroborate 1 h;  Ambient temperature;