1: 1.) 9-BBN, 2.) H2O2, NaOH / 1.) THF 2: 61 percent / PDC / dimethylformamide View Scheme

1: 4-DMAP / CH2Cl2 2: 1,3-dimethyl-2-phenyl-1,3,2-diazaphospholidine 3: 1.) 9-BBN, 2.) H2O2, NaOH / 1.) THF 4: 61 percent / PDC / dimethylformamide View Scheme

1.1: diisobutylaluminium hydride / hexane; dichloromethane / 0.5 h / -78 °C / Inert atmosphere 2.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere 2.2: 2 h / 0 °C / Inert atmosphere 3.1: mercury(II) diacetate; water / tetrahydrofuran / 23 h / 0 - 20 °C / Inert atmosphere 4.1: sodium dihydrogenphosphate; sodium chlorite; dihydrogen peroxide / water; acetonitrile / 1 h / 0 °C / Inert atmosphere View Scheme

1.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere 1.2: 2 h / 0 °C / Inert atmosphere 2.1: mercury(II) diacetate; water / tetrahydrofuran / 23 h / 0 - 20 °C / Inert atmosphere 3.1: sodium dihydrogenphosphate; sodium chlorite; dihydrogen peroxide / water; acetonitrile / 1 h / 0 °C / Inert atmosphere View Scheme

1: triethylamine / |Inert atmosphere 2: dimethyl sulfoxide / |Inert atmosphere 3: potassium hydroxide / water; ethanol / 90 °C / |Inert atmosphere View Scheme

1: dimethyl sulfoxide / |Inert atmosphere 2: potassium hydroxide / water; ethanol / 90 °C / |Inert atmosphere View Scheme

trifluoroacetic acid in dichloromethane T=0 - 20°C; 2 h;

T=20°C; 18 h;

in diethyl ether Yield given;

triethylamine; isobutyl chloroformate 1.) THF, -20 deg C, 30 min; 2.) Et2O, r.t., 16 h; Yield given. Multistep reaction;