1: ion exchanger Lewatit MP 5 (OH-form) / methanol / 1 h / 50 °C / yield: 70-80 percent 2: 21.9 percent Chromat. / 1 N HCl / 2 h / 60 °C / further temperatures: 23, 40, 80 deg C; different times: 10, 20, 30, 60, 120 min View Scheme

hydrogenchloride T=80°C; 2 h; Title compound not separated from byproducts;

hydrogenchloride

Mechanism;

Heatingheating more than 149 deg C;

1: N2O4 / CHCl3 / 50 - 60 °C 2: pyridine / 2 h / Heating View Scheme