反应详情

To a suspension of lithium aluminum hydride (LAH, 0.920 g, 24.24 mmol) in anhydrous THF (20 mL) at 0° C. was added dropwise a solution of ethyl 5-chloro-3-ethylpyridine-4-carboxylate (2.59 g, 12.12 mmol) in THF (30 mL). After stirring for 1 hour, the reaction mixture was slowly quenched with 15% aqueous NaOH and then water. Ethyl acetate was added, and the mixture was stirred for 10 minutes. The white precipitate was filtered off and washed with ethyl acetate (2×50 mL). The combined organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was evaporated to provide (3-chloro-5-ethylpyridin-4-yl)methanol as a thick oil (1.83 g, 88% yield) and used for the next step without any further purification; M+ 166.5.

1. customthe reaction mixture was slowly quenched with 15% aqueous NaOH
2. additionEthyl acetate was added
3. stirringthe mixture was stirred for 10 minutes
4. filtrationThe white precipitate was filtered off
5. washwashed with ethyl acetate (2×50 mL)
6. dry with materialThe combined organic layer was dried over anhydrous sodium sulfate
7. filtrationfiltered
8. customThe filtrate was evaporated