反应详情

To a stirred solution of 3-trifluoromethylaniline (1.90 g, 11.8 mmol), triethylamine (1.43 g, 14.5 mmol) and 4-N,N-dimethylaminopyridine (1 mg) in dichloromethane (20 ml) is added at 0° C. ethyl malonyl chloride (1.78 g, 11.8 mmol). The reaction mixture is warmed to room temperature overnight, then allowed to stand for two days. Water (20 ml) is added and the product is extracted with dichloromethane (1 l). The organic phase is washed with saturated ammonium chloride solution (500 ml) and saturated sodium chloride solution (200 ml), dried over magnesium sulphate monohydrate, filtered and concentrated. The crude product is chromatographed over silica gel with cyclohexane/ethyl acetate mixtures as eluent.

1. extractionthe product is extracted with dichloromethane (1 l)
2. washThe organic phase is washed with saturated ammonium chloride solution (500 ml) and saturated sodium chloride solution (200 ml)
3. dry with materialdried over magnesium sulphate monohydrate
4. filtrationfiltered
5. concentrationconcentrated
6. customThe crude product is chromatographed over silica gel with cyclohexane/ethyl acetate