反应详情

温度

140 °C

A stirred mixture of methyl 3-cyclopropyl-3-oxopropanoate (3.49 g, 26.3 mmol), triethyl orthoformate (5.2 mL, 31.6 mmol), and 4-bromo-3-fluoroaniline (4.47 g, 26.0 mmol) was heated at 140° C. overnight with a Dean Stark trap. After this time the reaction was cooled to room temperature, diluted with methylene chloride and filtered through a pad of silica. The filtrate was concentrated to afford the desired product (7.5 g, 85%) as a light yellow solid: ESI MS m/z 343 [C14H13BrFNO3+H]+.

1. temperatureAfter this time the reaction was cooled to room temperature
2. filtrationfiltered through a pad of silica
3. concentrationThe filtrate was concentrated