反应详情

温度

45 °C

2-(1,4-Dioxaspiro[4.5]dec-8-yl)pyridine N-oxide (3 g, 12.75 mmol) was combined with glacial acetic acid (20 mL), concentrated hydrochloric acid (10 mL), and water (10 mL). The resulting mixture was heated to 45° C. for 24 hours. The reaction was cooled to 0° C. and the pH was adjusted to 6 with 20% sodium hydroxide solution. The phases were separated and the aqueous layer was extracted with ethyl acetate (3×100 mL). The combined organic extracts were washed with water and brine, then dried (sodium sulfate), and concentrated under reduced pressure to yield 1.8 g of the product as an oil.

1. temperatureThe reaction was cooled to 0° C.
2. customThe phases were separated
3. extractionthe aqueous layer was extracted with ethyl acetate (3×100 mL)
4. washThe combined organic extracts were washed with water and brine
5. dry with materialdried (sodium sulfate)
6. concentrationconcentrated under reduced pressure