in acetonitrile 0.5 h; Heating;

1: 80 percent / isoamylnitrite, HCl / ethanol / 1) 0 deg C, 2) 5 h, 20 deg C 2: 80 percent / acetic anhydride / 2 h / 110 °C 3: 95 percent / conc. H2SO4 / 3 h / 100 °C 4: 74 percent / SnCl2*2H2O, 12 N HCl / 1) 0 deg C, 2 h, 2) 20 deg C, 2 h 5: NaOEt / ethanol / 3 h / Heating 6: 77 percent / acetonitrile / 0.5 h / Heating View Scheme

1: 75 percent / diazabicyclooctane / H2O / 4 h / 65 °C 2: 80 percent / isoamylnitrite, HCl / ethanol / 1) 0 deg C, 2) 5 h, 20 deg C 3: 80 percent / acetic anhydride / 2 h / 110 °C 4: 95 percent / conc. H2SO4 / 3 h / 100 °C 5: 74 percent / SnCl2*2H2O, 12 N HCl / 1) 0 deg C, 2 h, 2) 20 deg C, 2 h 6: NaOEt / ethanol / 3 h / Heating 7: 77 percent / acetonitrile / 0.5 h / Heating View Scheme

1: NaOEt / ethanol / 3 h / Heating 2: 77 percent / acetonitrile / 0.5 h / Heating View Scheme

1: 95 percent / conc. H2SO4 / 3 h / 100 °C 2: 74 percent / SnCl2*2H2O, 12 N HCl / 1) 0 deg C, 2 h, 2) 20 deg C, 2 h 3: NaOEt / ethanol / 3 h / Heating 4: 77 percent / acetonitrile / 0.5 h / Heating View Scheme

1: 80 percent / acetic anhydride / 2 h / 110 °C 2: 95 percent / conc. H2SO4 / 3 h / 100 °C 3: 74 percent / SnCl2*2H2O, 12 N HCl / 1) 0 deg C, 2 h, 2) 20 deg C, 2 h 4: NaOEt / ethanol / 3 h / Heating 5: 77 percent / acetonitrile / 0.5 h / Heating View Scheme

1: 74 percent / SnCl2*2H2O, 12 N HCl / 1) 0 deg C, 2 h, 2) 20 deg C, 2 h 2: NaOEt / ethanol / 3 h / Heating 3: 77 percent / acetonitrile / 0.5 h / Heating View Scheme