1: 25 percent / ZnCl2; AcOH; H2SO4 / 50 °C 2: 100 percent / 50percent aq. H2SO4 / acetic acid / 2 h / 100 °C 3: H2 / 10percent Pd/C / methanol / 6 h / 1551.49 Torr 4: 3percent aq. H2O2; aq. NaOH / 1 h / Heating 5: 70 percent / POCl3 / 1 h / Heating View Scheme

1: 100 percent / 50percent aq. H2SO4 / acetic acid / 2 h / 100 °C 2: H2 / 10percent Pd/C / methanol / 6 h / 1551.49 Torr 3: 3percent aq. H2O2; aq. NaOH / 1 h / Heating 4: 70 percent / POCl3 / 1 h / Heating View Scheme

1: H2 / 10percent Pd/C / methanol / 6 h / 1551.49 Torr 2: 3percent aq. H2O2; aq. NaOH / 1 h / Heating 3: 70 percent / POCl3 / 1 h / Heating View Scheme

1: 3 h / Ambient temperature 2: POCl3 / dimethylformamide / 1.5 h / Heating View Scheme

trichlorophosphate 1 h; Heating;

1: 3percent aq. H2O2; aq. NaOH / 1 h / Heating 2: 70 percent / POCl3 / 1 h / Heating View Scheme

1: ethanol; NH3 2: pyridine 3: water; NaOH View Scheme