反应详情

温度

140 °C

To 2-(3-Bromo-2-methyl-phenyl)-3-(3-dimethylamino-phenylamino)-acrylic acid ethyl ester (100 mg, 0.248 mmol) was added 4 g polyphosphoric acid. This stirred at 140° C. for 10 minutes. 50 ml water was added and the mixture was stirred. The resulting precipitate was filtered and washed with water. The filtrate was extracted with 10% methanol/dichloromethane solution. The organic layer was dried over anhydrous magnesium sulfate and concentrated in vacuo. The resulting residue was combined with the precipitate and purified by flash chromatography (gradient elution 2 to 5% methanol/dichloromethane) to yield 3-(3-Bromo-2-methyl-phenyl)-7-dimethylamino-1H-quinolin-4-one (22 mg, 0.062 mmol). MS (ESI) 357.0 (M+H)+.

1. stirringthe mixture was stirred
2. filtrationThe resulting precipitate was filtered
3. washwashed with water
4. extractionThe filtrate was extracted with 10% methanol/dichloromethane solution
5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
6. concentrationconcentrated in vacuo
7. custompurified by flash chromatography (gradient elution 2 to 5% methanol/dichloromethane)