1: 98 percent / potassium carbonate; potassium iodide / butan-2-one / 12 h / Heating 2: 93 percent / potassium t-butoxide / dimethylformamide / 2 h / 0 - 5 °C 3: 97 percent / acetic acid; cc. HCl / 11 h / 80 °C 4: 89 percent / pyridinium hydrobromide perbromide / CHCl3 / 1 h / 15 - 30 °C 5: 28 percent / potassium carbonate / CHCl3 / 96 h / Heating View Scheme

1: LiAlH4 / tetrahydrofuran / 0 °C 2: MnO2 / CH2Cl2 / 20 °C View Scheme

1: 98 percent / potassium carbonate; potassium iodide / butan-2-one / 12 h / Heating 2: 93 percent / potassium t-butoxide / dimethylformamide / 2 h / 0 - 5 °C View Scheme

pyridine hydrochloride in pyridine 8 h; Heating;