disodium hydrogenphosphate; sodium amalgam in methanol T=0°C; 2 h;

1: 96 percent / 6percent Na-Hg, Na2HPO4 / methanol / 2 h / 0 °C 2: TEMPO, NaOCl, KBr, 5percent NaHCO3 / acetone / 2 h / 0 °C 3: acetone 4: 100 percent / CH2Cl2 / 1 h / Ambient temperature 5: 100 percent / 1M HCl, propylene oxide / ethanol / Heating View Scheme