1: 90 percent / Br2, NaOH / H2O / 0.5 h / 50 °C 2: 90 percent / conc. H2SO4 / 17 h / Heating 3: 55 percent / 10 h / 150 - 155 °C 4: POCl3 / acetonitrile / 4 h / Heating 5: NaBH4 / methanol; H2O / 2 h / Ambient temperature 6: sodium methylsulfinylmethanide / dimethylsulfoxide / 15 h View Scheme

1: 90 percent / conc. H2SO4 / 17 h / Heating 2: 55 percent / 10 h / 150 - 155 °C 3: POCl3 / acetonitrile / 4 h / Heating 4: NaBH4 / methanol; H2O / 2 h / Ambient temperature 5: sodium methylsulfinylmethanide / dimethylsulfoxide / 15 h View Scheme

1: 55 percent / 10 h / 150 - 155 °C 2: POCl3 / acetonitrile / 4 h / Heating 3: NaBH4 / methanol; H2O / 2 h / Ambient temperature 4: sodium methylsulfinylmethanide / dimethylsulfoxide / 15 h View Scheme

1: POCl3 / acetonitrile / 4 h / Heating 2: NaBH4 / methanol; H2O / 2 h / Ambient temperature 3: sodium methylsulfinylmethanide / dimethylsulfoxide / 15 h View Scheme