反应详情

温度

0 °C

To 2-fluoro-4-hydroxy-5-methoxy-benzaldehyde (39, 1.20 g, 7.05 mmol, prepared as described in Scheme 12 of Example 15) in tetrahydrofuran (60.0 mL) were added triphenylphosphine (1.93 g, 7.35 mmol) and 3-(diethylamino)-propan-1-ol, (0.96 g, 7.30 mmol). The reaction was cooled to 0° C., followed by slow addition of diethyl azodicarboxylate (1.28 g, 7.35 mmol). The reaction was allowed to warm to room temperature overnight. The reaction was poured into water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 10% methanol in dichloromethane to give a colorless oil (102, 0.90 g, 45.0%).

1. temperatureto warm to room temperature overnight
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated
6. custompurified by silica gel column chromatography
7. washeluting with 10% methanol in dichloromethane
8. customto give a colorless oil (102, 0.90 g, 45.0%)