反应详情

Triphenylphosphine (5.89 g, 22.44 mmol) was added to a solution of 3-tert-butyl-4-hydroxybenzaldehyde (4 g, 22.44 mmol) in tetrahydrofuran (40 ml), followed by addition of 2-hydroxyethylmorpholine (2.94 g, 22.44 mmol) and then the dropwise addition of diethylazodicarboxylate (3.91 g, 22.44 mmol). The mixture was allowed to stir at room temperature for 3 days. The reaction was concentrated under reduced pressure and partitioned between 2N hydrochloric acid (200 ml) and ethyl acetate (150 ml). The aqueous layer was extracted with ethyl acetate (2×150 ml), basified to pH 9 with solid sodium bicarbonate, saturated with solid sodium chloride and extracted with ethyl acetate (3×150 ml). The combined organic layers were dried over magnesium sulfate and concentrated to afford 2.8 g (44%) of 3-tert-butyl-4-(2-morpholin-4-ylethoxy)benzaldehyde as a yellowish oil.

1. concentrationThe reaction was concentrated under reduced pressure
2. custompartitioned between 2N hydrochloric acid (200 ml) and ethyl acetate (150 ml)
3. extractionThe aqueous layer was extracted with ethyl acetate (2×150 ml)
4. extractionextracted with ethyl acetate (3×150 ml)
5. dry with materialThe combined organic layers were dried over magnesium sulfate
6. concentrationconcentrated