2-chloro-1-methyl-pyridinium iodide; triethylamine in dichloromethane 2 h; Heating;

1: 72 percent / 8N hydrochloric acid / H2O / 70-80 deg C, 0.5 h; reflux, 0.5 h 2: 89 percent / 2-chloro-1-methylpyridinium iodide, triethylamine / CH2Cl2 / 2 h / Heating View Scheme