Multi-step reaction with 3 steps 1: HCl, acetyl chloride / 0 - 20 °C2: 68 percent / N,N-diisopropylethylamine / CH2Cl2 / Ambient temperature; in dark3: 92 percent / ruthenium trichloride hydrate, NaIO4 / CCl4; acetonitrile; H2O / 0.08 h / Ambient temperature