1: Et3N / acetone / 0.25 h / 0 °C 2: 1.) NaN3, 2.) 8 M HCl / 1.) Me2CO, H2O, 0 deg C, 30 min, 2.) reflux, 10 min 3: 60 percent / methanol / 24 h / 20 °C View Scheme

Multi-step reaction with 2 steps 1: SOCl2 / 1,2-dichloro-ethane; dimethylformamide / 0.42 h / Heating2: 90 percent / conc. HCl / 1 h / 90 °C  

Multi-step reaction with 2 steps 1: Et3N / acetone / 0.25 h / 0 °C2: 1.) NaN3, 2.) 8 M HCl / 1.) Me2CO, H2O, 0 deg C, 30 min, 2.) reflux, 10 min