1: 91 percent / Et3N, DMAP / ethyl acetate / 1 h / 0 °C 2: Mn(OAc)3*2H2O, Cu(OAc)2*H2O / acetic acid / 12 h / Ambient temperature 3: 77 percent / aq. NaCl / dimethylformamide / 3 h / Heating 4: 1.) 9-BBN, 2.) 30percent aq. H2O2, 2 M aq. NaOH / 1.) THF, 20 deg C, overnight, 2.) THF, 12 h 5: pyridinium dichromate / dimethylformamide / 1 h / Ambient temperature 6: methanol; diethyl ether 7: 56 percent / BH3*THF / tetrahydrofuran / 1 h / Heating View Scheme

1: thionyl chloride; nitrogen / chloroform / 1.25 h / Heating / reflux 2: nitrogen / dimethyl sulfoxide / 100 °C 3: methanol / 100 h / 0 - 20 °C View Scheme

1: 4 h / 160 °C 2: lithium aluminium tetrahydride / diethyl ether / 2 h / 50 °C / Heating / reflux 3: thionyl chloride; nitrogen / chloroform / 1.25 h / Heating / reflux 4: nitrogen / dimethyl sulfoxide / 100 °C 5: methanol / 100 h / 0 - 20 °C View Scheme

1: 4 h / 160 °C 2: lithium aluminium tetrahydride / diethyl ether / 2 h / 50 °C / Heating / reflux 3: thionyl chloride; nitrogen / chloroform / 1.25 h / Heating / reflux 4: nitrogen / dimethyl sulfoxide / 100 °C 5: methanol / 100 h / 0 - 20 °C View Scheme

1: lithium aluminium tetrahydride / diethyl ether / 2 h / 50 °C / Heating / reflux 2: thionyl chloride; nitrogen / chloroform / 1.25 h / Heating / reflux 3: nitrogen / dimethyl sulfoxide / 100 °C 4: methanol / 100 h / 0 - 20 °C View Scheme

hydrogen; palladium on activated charcoal in methanol P=2250.2 Torr;