1: 2) NaClO4 / 1) etanol, reflux, 1 h, 2) Ethanol/H2O, 0 deg C, 12 h 2: 1) Na2CO3, 2) 5 N H2SO4 / 1) pyridine/H2O, room temp., 1 h, 2) ether View Scheme

1: 2) NaClO4 / 1) etanol, reflux, 1 h, 2) Ethanol/H2O, 0 deg C, 12 h 2: 1) Na2CO3, 2) 5 N H2SO4 / 1) pyridine/H2O, room temp., 1 h, 2) ether 3: HCO2H / 3 h / Heating View Scheme

1: 2) NaClO4 / 1) etanol, reflux, 1 h, 2) Ethanol/H2O, 0 deg C, 12 h 2: 1) Na2CO3, 2) 5 N H2SO4 / 1) pyridine/H2O, room temp., 1 h, 2) ether 3: 79 percent / benzene / 1 h / Ambient temperature 4: K2CO3 / benzene / 8 h / Heating View Scheme