1: 92 percent / sodium ethoxide / ethanol / 2 h / Heating 2: 62 percent / SeO2 / dioxane / 6 h / Heating 3: 82 percent / hydrure de sodium / tetrahydrofuran / 2.5 h / 30 - 40 °C 4: 100 percent / Br2 / CCl4 / 2 h / 15 - 20 °C 5: 15 percent / chlorure de pyridinium / 0.33 h / Heating View Scheme

1: 90 percent / soude / H2O / 1 h 2: 62 percent / SeO2 / dioxane / 6 h / Heating 3: 82 percent / hydrure de sodium / tetrahydrofuran / 2.5 h / 30 - 40 °C 4: 100 percent / Br2 / CCl4 / 2 h / 15 - 20 °C 5: 15 percent / chlorure de pyridinium / 0.33 h / Heating View Scheme

1: 82 percent / hydrure de sodium / tetrahydrofuran / 2.5 h / 30 - 40 °C 2: 100 percent / Br2 / CCl4 / 2 h / 15 - 20 °C 3: 15 percent / chlorure de pyridinium / 0.33 h / Heating View Scheme

1: 62 percent / SeO2 / dioxane / 6 h / Heating 2: 82 percent / hydrure de sodium / tetrahydrofuran / 2.5 h / 30 - 40 °C 3: 100 percent / Br2 / CCl4 / 2 h / 15 - 20 °C 4: 15 percent / chlorure de pyridinium / 0.33 h / Heating View Scheme

1: 100 percent / Br2 / CCl4 / 2 h / 15 - 20 °C 2: 15 percent / chlorure de pyridinium / 0.33 h / Heating View Scheme

1: (i) aq. NaNO2, H2SO4, aq. H3PO2 2: KOH / ethanol / 1 h / Heating 3: Cu View Scheme

1: KOH / ethanol / 1 h / Heating 2: Cu View Scheme

chlorine in tetrachloromethane 2 h; Heating;