1: 100 percent / AcOH / H2O / 8 h / Heating 2: 96 percent / P4S10, NaHCO3 / 1,2-dimethoxy-ethane / 15 h / 20 °C 3: 1.) (CH3)2SO4 / 1.) 12 h, 50 deg C, acetonitrile; 2.) 15 h, 20 deg C View Scheme

1: 100 percent / AcOH / H2O / 8 h / Heating 2: 96 percent / P4S10, NaHCO3 / 1,2-dimethoxy-ethane / 15 h / 20 °C 3: 1.) (CH3)2SO4 / 1.) 12 h, 50 deg C, acetonitrile; 2.) 15 h, 20 deg C View Scheme

1: 96 percent / P4S10, NaHCO3 / 1,2-dimethoxy-ethane / 15 h / 20 °C 2: 1.) (CH3)2SO4 / 1.) 12 h, 50 deg C, acetonitrile; 2.) 15 h, 20 deg C View Scheme

dimethyl sulfate 1.) 12 h, 50 deg C, acetonitrile; 2.) 15 h, 20 deg C; Yield given. Multistep reaction;