tetrachloromethane; triphenylphosphine in N,N-dimethyl-formamide 15 h; Ambient temperature;

1: 68 percent / aq. HCl / 18 h / Heating 2: 50 percent / t-BuOK / dimethylformamide / 1.5 h / -10 °C 3: 93 percent / triphenylphosphine, CCl4 / dimethylformamide / 15 h / Ambient temperature View Scheme

1: 50 percent / t-BuOK / dimethylformamide / 1.5 h / -10 °C 2: 93 percent / triphenylphosphine, CCl4 / dimethylformamide / 15 h / Ambient temperature View Scheme

1: 53 percent / K2CO3 / dimethylsulfoxide / 18 h / Ambient temperature 2: 68 percent / aq. HCl / 18 h / Heating 3: 50 percent / t-BuOK / dimethylformamide / 1.5 h / -10 °C 4: 93 percent / triphenylphosphine, CCl4 / dimethylformamide / 15 h / Ambient temperature View Scheme