1: 74 percent / NaI / dimethylformamide / 42 h / 65 °C 3: powdered sodium hydroxide / dioxane / 14 h / Ambient temperature; further solvents were also used 4: Adogen, sodium dithionite, NaHCO3 / cyclohexane; H2O / 2 h / Heating View Scheme
1: 74 percent / NaI / dimethylformamide / 42 h / 65 °C 3: powdered sodium hydroxide / dioxane / 14 h / Ambient temperature; further solvents were also used 4: Adogen, sodium dithionite, NaHCO3 / cyclohexane; H2O / 2 h / Heating 5: pyridine / 4 h / Ambient temperature View Scheme