反应详情

温度

50 °C

To 5-chloro-2-fluoro-N-(2-methoxy-4-pyridyl)benzamide (3.8 g, 13.50 mmol) in acetonitrile (126.3 mL) was added TMSI (7.7 mL, 54.00 mmol). The reaction was stirred at 50° C. overnight. The acetonitrile was evaporated and the crude re-dissolved in ethyl acetate. The organics were washed with water, dried over sodium sulfate, filtered and concentrated. Purification by silica gel chromatography using a gradient of ethyl acetate in hexanes (0-100%) and then methanol in dichloromethane (0-20%) yielded 5-chloro-2-fluoro-N-(2-oxo-1H-pyridin-4-yl)benzamide (950 mg, 26%) as a white solid. ESI-MS m/z calc. 266.03. found 267.1 (M+1)+; Retention time: 1.24 minutes (3 minutes run).

1. customThe acetonitrile was evaporated
2. dissolutionthe crude re-dissolved in ethyl acetate
3. washThe organics were washed with water
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification by silica gel chromatography