1.1: sodium carbonate; dihydrogen peroxide / water; acetone / 14 h / 20 °C 2.1: toluene-4-sulfonic acid / toluene / 14 h / Reflux 3.1: trichlorophosphate / 14 h / 100 °C 3.2: 0 °C / pH 6 - 7 View Scheme

1: 73 percent / 3N Na2CO3, 15percent H2O2 / acetone / 6 h / Ambient temperature 2: 55 percent / TsOH / benzene / 20 h / Heating View Scheme

dihydrogen peroxide; sodium carbonate in methanol; water T=20°C; 4.5 h;

1.1: sodium carbonate; dihydrogen peroxide / water; acetone / 14 h / 20 °C 2.1: toluene-4-sulfonic acid / toluene / 14 h / Reflux 3.1: trichlorophosphate / 14 h / 100 °C 3.2: 0 °C / pH 6 - 7 4.1: sodium azide / N,N-dimethyl-formamide / 4 h / 80 °C 5.1: hydrogenchloride; SnCl2·2H2O / water; methanol / 5 h / Reflux View Scheme