1: 67 percent / CaCO3, CH3I / acetonitrile; H2O / 1.5 h / Heating 2: 65 percent / Jones reagent / acetone / 0.33 h / 0 °C View Scheme

Multi-step reaction with 3 steps 1: 91 percent / conc. HCl / acetone2: 82 percent / H2O; ethanol / 48 h / Ambient temperature; D-glucose, Baker's yeast3: 97 percent / acetone  

Multi-step reaction with 5 steps 1: 67 percent / CaCO3, CH3I / acetonitrile; H2O / 1.5 h / Heating2: 65 percent / Jones reagent / acetone / 0.33 h / 0 °C3: SOCl2 / CHCl3 / 2 h / 70 °C4: diethyl ether / 0.5 h5: 61.3 percent / KOAc, Cu(OAc)2 / acetic acid / 12 h / 60 - 70 °C