hydrogenchloride; formaldehyd in acetic acid T=30°C;

hydrogenchloride in acetic acid 1 h;

1: 60 percent / TiCl4 / CH2Cl2 / 4.5 h 2: 98 percent / HCl gas, 37percent formalin / acetic acid / 30 °C View Scheme

1: 1.) fluoroboric acid, n-butyl nitrile / 1.) methanol, 0 deg C, 1 h, 2.) reflux 2: 60 percent / TiCl4 / CH2Cl2 / 4.5 h 3: 98 percent / HCl gas, 37percent formalin / acetic acid / 30 °C View Scheme