反应详情

温度

-35 °C

x)—The alcohol obtained in the previous step (1.5 g) in dry tetrahydrofuran (24 ml) was added to a refluxing solution of lithium (2.12 g) in liquid ammonia (98 ml). After 4.5 h stirring at −35° C., 2-propanol was added in 30 min. and the ammonia was allowed to evaporate. Water was added and the product was extracted into ethyl acetate. The combined organic phases were washed with brine, dried over sodium sulfate and concentrated under reduced pressure, to give (7α,17β)-7-ethyl-3-methoxyestra-2,5(10),14-trien-17-ol (1.65 g) The product was used in the following step without further purification.

1. customto evaporate
2. additionWater was added
3. extractionthe product was extracted into ethyl acetate
4. washThe combined organic phases were washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated under reduced pressure