1: 92 percent / aq. HCl / ethanol / 1.5 h / Heating 3: 80 percent / isoamyl nitrite / ethanol; HCl / 1.) 0 deg C, 30 min, 2.) 25 deg C, 16 h 4: 76 percent / acetic anhydride / 1 h / 140 °C 5: SnCl2*2H2O, 12N HCl / H2O / 1.) 0 deg C, 2 h, 2.) 25 deg C, 16 h 6: KOH / H2O; ethanol / 2 h / Heating 7: 85 percent / Na / ethanol / 3 h / Heating 8: 80 percent / Et4N(1+)Cl(1-), PhNEt2,POCl3 / acetonitrile / 4 h / 100 °C 9: 53 percent / Na / NH3 / 2.5 h / -75 °C 10: 11 percent / 810 - 850 °C / 0 Torr View Scheme