1: AcBr / 16 h / 20 °C 2: TsOH*H2O / acetonitrile / 16 h / 20 °C View Scheme

1: 95 percent / silver zeolite / CH2Cl2 / 1 h / Ambient temperature 2: 85 percent / sodium methoxide / methanol View Scheme

acetyl-bromide T=20°C; 16 h; Yield given;

silver zeolite in dichloromethane 1 h; Ambient temperature;

1: 74 percent / Hg(CN)2 2: 53 percent / aq. HCl / acetone View Scheme

1: 54 percent / silver zeolite / CH2Cl2 / 40 h / Ambient temperature 2: 99 percent / methanol / 0.5 h View Scheme

1: 54 percent / silver zeolite / CH2Cl2 / 40 h / Ambient temperature 2: 99 percent / methanol / 0.5 h 3: 64 percent / p-TsOH*H2O / acetonitrile / 0.83 h / Ambient temperature 4: 90 percent / 1) NaH / tetrahydrofuran / 21 h / Ambient temperature 5: 1) sodium cyanoborohydride, mol. sieves 3A, 2) TFA / 1) DMF, 15 min, RT, 2) DMF, 43 h 6: 66 percent / silver triflate, collidine / nitromethane / 1) -25 deg C, 30 min, 2) RT, 4.5 h 7: 86 percent / ammonium cerium(IV) nitrate / acetonitrile; H2O / Ambient temperature; 1) 0 deg C, 10 min, 2) RT, 45 min View Scheme

silver zeolite in dichloromethane 40 h; Ambient temperature;

1: 1) AgOTf, 2,4,6-trimethylpyridine / 1) CH2Cl2, -40 deg C, 5 min, 2) CH2Cl2, RT, 18 h 2: N2H4*H2O / ethanol / 8 h / Heating 3: pyridine / 18 h / Ambient temperature 4: NaOMe / methanol 5: H2 / Pd-C / methanol; ethanol; H2O View Scheme

1: 95 percent / silver zeolite / CH2Cl2 / 1 h / Ambient temperature 2: 85 percent / sodium methoxide / methanol 3: 85 percent / p-toluenesulphonic acid / acetonitrile 4: 86 percent / sodium hydride / 1,2-dimethoxy-ethane 5: 95 percent / molecular sieves, sodium cyanoborohydride, HCl / tetrahydrofuran; diethyl ether / 1 h / Ambient temperature View Scheme