1.1: 81 percent / tetrabutylammonium bromide; sodium dithionite; potassium hydroxide / tetrahydrofuran; H2O / 16 h / 20 °C 2.1: 83 percent / phosphoryl chloride / CH2Cl2 / 0 - 20 °C 3.1: 72 percent / hydrogen peroxide; sulfuric acid / methanol; H2O / 1.5 h / 20 °C 4.1: 74 percent / tetrabutylammonium bromide; sodium dithionite; potassium hydroxide / tetrahydrofuran; H2O / 16 h / 20 °C 5.1: n-butyllithium; TMEDA / tetrahydrofuran / -78 - 20 °C 5.2: 55 percent / tetrahydrofuran / -78 - 20 °C 6.1: n-butyllithium; TMEDA / tetrahydrofuran / -78 - 20 °C 6.2: 95 percent / tetrahydrofuran / -78 - 20 °C 7.1: silver(II) oxide; nitric acid / dioxane; H2O / 0.03 h / 20 °C 7.2: sodium hydroxide / methanol; H2O / 0.5 h / 20 °C View Scheme

1.1: n-butyllithium; TMEDA / tetrahydrofuran / -78 - 20 °C 1.2: 95 percent / tetrahydrofuran / -78 - 20 °C 2.1: silver(II) oxide; nitric acid / dioxane; H2O / 0.03 h / 20 °C 2.2: sodium hydroxide / methanol; H2O / 0.5 h / 20 °C View Scheme

1.1: 86 percent / glacial acetic acid; sulfuric acid / H2O / 22 h / Heating 2.1: 77 percent / sulfuric acid / 5 h / Heating 3.1: 85 percent / perchloric acid / H2O / 16 h / 20 °C 4.1: sodium ethoxide / ethanol / 0.33 h / Heating 4.2: 56 percent / air / ethanol / 48 h / 20 °C View Scheme

1.1: 85 percent / perchloric acid / H2O / 16 h / 20 °C 2.1: sodium ethoxide / ethanol / 0.33 h / Heating 2.2: 56 percent / air / ethanol / 48 h / 20 °C View Scheme

1.1: 77 percent / sulfuric acid / 5 h / Heating 2.1: 85 percent / perchloric acid / H2O / 16 h / 20 °C 3.1: sodium ethoxide / ethanol / 0.33 h / Heating 3.2: 56 percent / air / ethanol / 48 h / 20 °C View Scheme

1.1: 99 percent / dimethylsulfoxide / 20 °C 2.1: 86 percent / glacial acetic acid; sulfuric acid / H2O / 22 h / Heating 3.1: 77 percent / sulfuric acid / 5 h / Heating 4.1: 85 percent / perchloric acid / H2O / 16 h / 20 °C 5.1: sodium ethoxide / ethanol / 0.33 h / Heating 5.2: 56 percent / air / ethanol / 48 h / 20 °C View Scheme

1.1: 96 percent / thionyl chloride / 1 h / 20 °C 2.1: 99 percent / dimethylsulfoxide / 20 °C 3.1: 86 percent / glacial acetic acid; sulfuric acid / H2O / 22 h / Heating 4.1: 77 percent / sulfuric acid / 5 h / Heating 5.1: 85 percent / perchloric acid / H2O / 16 h / 20 °C 6.1: sodium ethoxide / ethanol / 0.33 h / Heating 6.2: 56 percent / air / ethanol / 48 h / 20 °C View Scheme