1: 74 percent / aq. potassium iododichloride / H2O / 18 h / 55 - 60 °C 2: 92 percent / thionyl chloride 3: N,N-dimethyl-acetamide / 16 h / Ambient temperature 4: pyridine / 6 h / Ambient temperature View Scheme

1: 92 percent / thionyl chloride 2: N,N-dimethyl-acetamide / 16 h / Ambient temperature 3: pyridine / 6 h / Ambient temperature View Scheme

1: N,N-dimethyl-acetamide / 16 h / Ambient temperature 2: pyridine / 6 h / Ambient temperature View Scheme

pyridine 6 h; Ambient temperature; Yield given;