1.1: sodium carbonate / diethyl ether / 0.08 h / Inert atmosphere 1.2: 2 h / Inert atmosphere 2.1: trichlorophosphate / acetonitrile / 0.5 h / Reflux; Inert atmosphere 3.1: hydrogenchloride / ethanol; water / 2 h / Reflux; Inert atmosphere View Scheme

1: 93 percent / triethylamine / methanol / 0.17 h / Heating 2: 80 percent / NaBH4 / methanol / 30 h / 0 °C 3: 100 percent / formic acid / methanol; H2O / 0.5 h / Heating 4: 77 percent / 28percent aq. NH3, ferrous sulfate heptahydrate / methanol / 0.5 h / Heating 5: 35 percent / conc. H2SO4 / -10 °C 6: 30 percent / BBr3 / CH2Cl2 / 4 h / Ambient temperature View Scheme