phosphorus pentoxide in various solvent(s) 2.5 h; Heating;

1: 1.) diborane, 2.) H2O2 / 1.) THF, 20 deg C, 1.5 h, 2.) THF-ethanol-water, 0 deg C, 1 h, room temp. overnight 2: 55 percent / CrO3, H2SO4 / acetone; H2O / 0.5 h / 0 °C 3: 20 percent / ter-BuOK / tetrahydrofuran; hexamethylphosphoric acid triamide / 5 h / 55 °C 4: 90 percent / LiAlH4 / tetrahydrofuran / 1 h 5: 48 percent / P2O5 / various solvent(s) / 2.5 h / Heating View Scheme

1: 90 percent / LiAlH4 / tetrahydrofuran / 1 h 2: 48 percent / P2O5 / various solvent(s) / 2.5 h / Heating View Scheme

1: 20 percent / ter-BuOK / tetrahydrofuran; hexamethylphosphoric acid triamide / 5 h / 55 °C 2: 90 percent / LiAlH4 / tetrahydrofuran / 1 h 3: 48 percent / P2O5 / various solvent(s) / 2.5 h / Heating View Scheme

1: 55 percent / CrO3, H2SO4 / acetone; H2O / 0.5 h / 0 °C 2: 20 percent / ter-BuOK / tetrahydrofuran; hexamethylphosphoric acid triamide / 5 h / 55 °C 3: 90 percent / LiAlH4 / tetrahydrofuran / 1 h 4: 48 percent / P2O5 / various solvent(s) / 2.5 h / Heating View Scheme