1: 76 percent / propionic acid / xylene / 3 h / Heating 2: 100 percent / H2 / PtO2 / hexane / 30 h / 760 Torr 3: 6.7 g / LAH / diethyl ether / 0.5 h / Ambient temperature 4: 98 percent / imidazole / dimethylformamide / 1 h 5: 89 percent / 0.67 h / Heating 6: TBAF / tetrahydrofuran / 24 h View Scheme

1: 100 percent / H2 / PtO2 / hexane / 30 h / 760 Torr 2: 6.7 g / LAH / diethyl ether / 0.5 h / Ambient temperature 3: 98 percent / imidazole / dimethylformamide / 1 h 4: 89 percent / 0.67 h / Heating 5: TBAF / tetrahydrofuran / 24 h View Scheme

tetrabutyl ammonium fluoride in tetrahydrofuran 24 h;

1: 98 percent / imidazole / dimethylformamide / 1 h 2: 89 percent / 0.67 h / Heating 3: TBAF / tetrahydrofuran / 24 h View Scheme

1: 6.7 g / LAH / diethyl ether / 0.5 h / Ambient temperature 2: 98 percent / imidazole / dimethylformamide / 1 h 3: 89 percent / 0.67 h / Heating 4: TBAF / tetrahydrofuran / 24 h View Scheme

1: 89 percent / 0.67 h / Heating 2: TBAF / tetrahydrofuran / 24 h View Scheme

water; acetic acid in tetrahydrofuran Ambient temperature;

1: pyridine / Ambient temperature 2: acetic acid, water / tetrahydrofuran / Ambient temperature View Scheme

1: Jones reagent / acetone / 0.25 h / Ambient temperature 2: KOH, methanol View Scheme