1: HCl / methanol; CHCl3 / 1 h / Ambient temperature 2: 85 percent / acetonitrile / 6 h / Ambient temperature View Scheme

1: HCl / methanol; CHCl3 / 1 h / Ambient temperature 2: 85 percent / acetonitrile / 6 h / Ambient temperature 3: 1.) Et3N, 2.) 0.1 M aq. KCl / 1.) CHCl3, r.t., 6 h; 40 deg C, 12 h, 2.) r.t., 1 h 4: 47 percent / CHCl3 / 14 h / 65 °C View Scheme

With  hydrogenchloride in  methanol; chloroform 1 h;  Ambient temperature;   

Multi-step reaction with 3 steps 1: HCl / methanol; CHCl3 / 1 h / Ambient temperature2: 85 percent / acetonitrile / 6 h / Ambient temperature3: 1.) Et3N, 2.) 0.1 M aq. KCl / 1.) CHCl3, r.t., 6 h; 40 deg C, 12 h, 2.) r.t., 1 h  

Multi-step reaction with 3 steps 1: HCl / methanol; CHCl3 / 1 h / Ambient temperature2: 85 percent / acetonitrile / 6 h / Ambient temperature3: 92 percent / Et3N / benzene / 1.) 0 deg C, 15 min, 2.) r.t., 24 h