1: benzyl 3,6-di-O-benzyl-2-deoxy-2-N-phthalimido-β-D-glucopyranoside With ethylenediamine in ethanol Reflux; 2: acetic anhydride in ethanol 3 h;

triethylsilane; boron trifluoride diethyl etherate in dichloromethane T=0°C; 1 h;

tetra-(n-butyl)ammonium iodide; di(n-butyl)tin oxide in benzene 24 h; Heating;

1: p-toluenesulphonic acid / acetonitrile / 60 h / 60 °C 2: NaH / tetrahydrofuran 3: NaCNBH3, molecular sieves 3 Angstroem, etheral HCl / tetrahydrofuran / 0.75 h View Scheme

1: 80.65 percent / trifluoroacetic acid / methanol; H2O 2: 1.) bis(tributylstannyl)oxide, 2.) tetrabutylammonium iodide / 1.) toluene, reflux, 16 h, 2.) reflux, 4 h View Scheme

1: 78 percent / barium oxide, barium hydroxide octahydrate / dimethylformamide / 16 h 2: 80.65 percent / trifluoroacetic acid / methanol; H2O 3: 1.) bis(tributylstannyl)oxide, 2.) tetrabutylammonium iodide / 1.) toluene, reflux, 16 h, 2.) reflux, 4 h View Scheme

1: 78 percent / barium oxide, barium hydroxide octahydrate / dimethylformamide / 16 h 2: 80.65 percent / trifluoroacetic acid / methanol; H2O 3: 1.) bis(tributylstannyl)oxide, 2.) tetrabutylammonium iodide / 1.) toluene, reflux, 16 h, 2.) reflux, 4 h View Scheme

1: 6.88 g / NaOMe / methanol / Ambient temperature 2: p-toluenesulphonic acid / acetonitrile / 60 h / 60 °C 3: NaH / tetrahydrofuran 4: NaCNBH3, molecular sieves 3 Angstroem, etheral HCl / tetrahydrofuran / 0.75 h View Scheme

1: 1. BF3*Et2O 2. trimethylsilyl trifluoromethanesulfonate / 1. CH2Cl2, room temperature 2. 1,2-dichloroethane 2: NaOCH3 / methanol 3: 3 g / p-TosOH / acetone / 1 h / Heating 4: barium hydroxide, barium oxide / dimethylformamide 5: 1.89 g / amberlyst 15 (H+) / methanol; H2O / 6 h / Ambient temperature 6: 69 percent / dibutyltin oxide, tetrabutylammonium iodide / benzene / 24 h / Heating View Scheme

1: 4.6 g / pyridine 2: 1. BF3*Et2O 2. trimethylsilyl trifluoromethanesulfonate / 1. CH2Cl2, room temperature 2. 1,2-dichloroethane 3: NaOCH3 / methanol 4: 3 g / p-TosOH / acetone / 1 h / Heating 5: barium hydroxide, barium oxide / dimethylformamide 6: 1.89 g / amberlyst 15 (H+) / methanol; H2O / 6 h / Ambient temperature 7: 69 percent / dibutyltin oxide, tetrabutylammonium iodide / benzene / 24 h / Heating View Scheme