反应详情

75.8 g of 4-methoxy-3,5-dimethyl-2-pyridylmethanol dissolved in 200 ml of methylene chloride are added dropwise at 0° to 38 ml of thionyl chloride in 400 ml of methylene chloride. After stirring at room temperature for 16 hours 1800 ml of ether are added dropwise thereto while cooling and the mixture is stirred further at room temperature for 2 hours. The precipitated crystals are filtered off under suction and washed with ether. There is obtained 2-(chloromethyl)-4-methoxy-3,5-dimethylpyridine hydrochloride of melting point 130°-131°.

1. additionare added dropwise
2. temperaturewhile cooling
3. filtrationThe precipitated crystals are filtered off under suction
4. washwashed with ether