1: 56 percent / 8 molpercent RhCl(PPh3)3 / acetonitrile; H2O / 5 h / Heating 2: 1.) O3, CF3COOH, 2.) Me2S / 1.) CH2Cl2, CH3OH, -60 deg C, 2.) CH2Cl2, CH3OH, 0 deg C 3: H2S(g), HCl(g), TiCl4 / 24 h / 0 - 20 °C View Scheme