1: 5.1 g / pyridine / 15 h / Ambient temperature 2: 26.2 g / pyridine / 16 h / Ambient temperature 3: 16.9 g / sodium iodide / acetic anhydride / 0.5 h / 120 - 130 °C 4: 11.6 g / silver fluoride / pyridine / 3.5 h / 20 - 25 °C 5: 3.5 g / 5 M ammonium hydroxide / ethanol / 96 h / Ambient temperature 6: 2.4 g / bromine / methanol / 1 h / 0 - 5 °C 7: 104 mg / barium hydroxide / H2O / 5 h / 60 - 70 °C View Scheme