反应详情

A solution of 22.2 g of 4-(tert-butyl-dimethylsilyloxyethyl)-2-cyanopyridine in 220 ml anhydrous ethanol containing 0.19 g of sodium is stirred at room temperature for 24 hours. The solution is then cooled to 0° and 22 ml of 6N hydrochloric acid added. The solution is stirred at room temperature for 16 hours, cooled to 0° and 7.5 ml 6N sodium hydroxide added followed by 75 ml saturated aqueous sodium bicarbonate. Extraction with methylene chloride and flash chromatography using ethyl acetate yields ethyl 4-(2-hydroxyethyl)-pyridine-2-carboxylate.

1. temperatureThe solution is then cooled to 0°
2. temperaturecooled to 0°
3. extractionExtraction with methylene chloride and flash chromatography