boron tribromide in dichloromethane 4 h; Ambient temperature;

1: 93 percent / triethylamine / methanol / 0.17 h / Heating 2: 80 percent / NaBH4 / methanol / 30 h / 0 °C 3: 100 percent / formic acid / methanol; H2O / 0.5 h / Heating 4: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 5: 35 percent / conc. H2SO4 / -10 °C 6: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 80 percent / NaBH4 / methanol / 30 h / 0 °C 2: 100 percent / formic acid / methanol; H2O / 0.5 h / Heating 3: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 4: 35 percent / conc. H2SO4 / -10 °C 5: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 35 percent / conc. H2SO4 / -10 °C 2: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 100 percent / formic acid / methanol; H2O / 0.5 h / Heating 2: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 3: 35 percent / conc. H2SO4 / -10 °C 4: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 2: 35 percent / conc. H2SO4 / -10 °C 3: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 1.) triethylamine 2.) sodium azide / 1.) acetone, water, -5 deg C, 30 min, 2.) acetone, water, -5 deg C, 10 min 2: toluene / 0.17 h / Heating 3: 8N aq. HCl / 0.5 h / Heating 4: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme

1: 93 percent / triethylamine / methanol / 0.17 h / Heating 2: 80 percent / NaBH4 / methanol / 30 h / 0 °C 3: 100 percent / formic acid / methanol; H2O / 0.5 h / Heating 4: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 5: 35 percent / conc. H2SO4 / -10 °C 6: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme