potassium hydrogencarbonate in methanol 0.833333 h; Heating;

sodium methylate in methanol 1 h; Heating;

1: 73 percent / CH3ONa / 14 h / 120 °C 2: tetrahydrothiophene 1,1-dioxide / 2 h / 40 - 45 °C 3: H2O / tetrahydrothiophene 1,1-dioxide / 70 deg C, 30 min; room temperature overnight View Scheme

1: tetrahydrothiophene 1,1-dioxide / 2 h / 40 - 45 °C 2: H2O / tetrahydrothiophene 1,1-dioxide / 70 deg C, 30 min; room temperature overnight View Scheme