1: 8 percent / K2CO3 / dimethylformamide / 24 h / Ambient temperature 2: 26 percent / 8N HCl / 3 h / Ambient temperature 3: 32 percent / Et3N / CCl4 / 1 h / Ambient temperature View Scheme

potassium carbonate in N,N-dimethyl-formamide 24 h; Ambient temperature;

1: 8 percent / K2CO3 / dimethylformamide / 24 h / Ambient temperature 2: 26 percent / 8N HCl / 3 h / Ambient temperature View Scheme