4-(N,N-dimethlyamino)pyridine; triethylamine in dichloromethane 60 h;

1.1: 80 percent / triethylamine; 4-(dimethylamino)pyridine / CH2Cl2 / 60 h 2.1: N-chlorosuccinimide; dimethyl sulfide / CH2Cl2 / 3 h / -20 °C 2.2: triethylamine / CH2Cl2 / 1 h View Scheme