calcium sulfate; iodine; silver carbonate 1.) dichlormethane, room temp., 2 h; 2.) room temp. 30 h; Yield given. Multistep reaction;

calcium sulfate; iodine; silver carbonate 1.) dichlormethane, room temp., 2 h; 2.) room temp. 30 h; Yield given. Multistep reaction;

1: 1.) Bu2SnO / 1.) benzene, MeOH, reflux, 2.5 h; 2.) DMF, 100-120 deg C, 3.5 h 2: 53 percent / LiAlH4, AlCl3 / diethyl ether; CH2Cl2 / 2 h / Heating 3: 47 percent / powdered molecular sieve 4 A, HgBr2 / 1,2-dichloro-ethane / 24 h / 45 °C 4: 95 percent / MeOH / 1 M NaOMe / 15 h / 20 °C 5: 44 percent / hydrogen / 10 percent Pd-C / ethanol; H2O / 72 h / 20 °C View Scheme

calcium sulfate; iodine; silver carbonate 1.) dichlormethane, room temp., 2 h; 2.) room temp. 30 h; Yield given. Multistep reaction;