1: 89 percent / pyridine / 12 h / Ambient temperature 2: SOCl2 / 3 h / Heating 3: (4-dimethylamino)pyridine, Et3N / CH2Cl2 / 12 h / Ambient temperature View Scheme

1: SOCl2 / 3 h / Heating 2: (4-dimethylamino)pyridine, Et3N / CH2Cl2 / 12 h / Ambient temperature View Scheme

4-(N,N-dimethlyamino)pyridine; triethylamine in dichloromethane 12 h; Ambient temperature; Yield given;