1: 75 percent / H2O / 32 °C / bakers'yeast (glucose, KH2PO4, NH4H2PO4, MgSO4, CaCO3), 1) 12 h, 2) 2 d 2: 71 percent Turnov. / Et3N / diethyl ether / 96 h / Ambient temperature 3: 76 percent / H2 / Pd/C / ethanol / 144 h / 760 Torr 4: 36 percent / conc. HCl / H2O / 8 h / 95 °C View Scheme

sulfuryl dichloride; benzene T=0°C;

sulfuryl dichloride; toluene-4-sulfonic acid 1) CH2Cl2, rt, 3 h, reflux, 40 min; 2) benzene, reflux; Yield given. Multistep reaction;