1: 56 percent / K2CO3 / methanol / 0.17 h / Heating 2: Et3N / CH2Cl2 / 0.75 h / 0 °C 3: NaCl / dimethylformamide / 0.08 h / 120 °C 4: 99 percent / concd. HCl / 1.5 h / Heating 5: EtOCOCl, Et3N / acetone / 0.17 h / -5 °C 6: aq. NaN3 / acetone / 0.5 h / 0 °C 7: toluene / 1.5 h / Heating 8: 8 N HCl / 0.17 h / Heating 9: methanol / 14 h / 20 °C View Scheme

1: 57 percent / K2CO3 / methanol / 0.17 h / Heating 2: Et3N / CH2Cl2 / 0.75 h / 0 °C 3: NaCl / dimethylformamide / 0.08 h / 120 °C 4: 73 percent / concd. HCl / 1.5 h / Heating 5: EtOCOCl, Et3N / acetone / 0.17 h / -5 °C 6: aq. NaN3 / acetone / 0.5 h / 0 °C 7: toluene / 1.5 h / Heating 8: 8 N HCl / 0.17 h / Heating 9: 76 percent / methanol / 14 h / 20 °C View Scheme