1.1: 92 percent / SO2Cl2 / toluene / 0.25 h / 20 °C 2.1: 61.98 g / tetrahydrofuran / 3 h / 25 °C 3.1: formic acid / dimethylformamide / 24 h / 140 °C 3.2: NaOH / H2O / 0.5 h / 100 °C 4.1: Cu2O / quinoline / 1 h / 190 °C 5.1: 23 percent / POCl3 / 4 h / Heating View Scheme

1.1: 61.98 g / tetrahydrofuran / 3 h / 25 °C 2.1: formic acid / dimethylformamide / 24 h / 140 °C 2.2: NaOH / H2O / 0.5 h / 100 °C 3.1: Cu2O / quinoline / 1 h / 190 °C 4.1: 23 percent / POCl3 / 4 h / Heating View Scheme

1: Cu2O / quinoline / 1 h / 190 °C 2: 23 percent / POCl3 / 4 h / Heating View Scheme

1.1: formic acid / dimethylformamide / 24 h / 140 °C 1.2: NaOH / H2O / 0.5 h / 100 °C 2.1: Cu2O / quinoline / 1 h / 190 °C 3.1: 23 percent / POCl3 / 4 h / Heating View Scheme

trichlorophosphate 4 h; Heating;